Datasheet Sound Processor with Built-in 3-band Equalizer BD37541FS Key Specifications General Description BD37541FS is a sound processor with built-in 3-band equalizer for car audio. The functions are stereo input selector (which can switch single and ground isolation input), input-gain control, main volume, loudness, 5ch fader volume and mixing input. Moreover, "Advanced switch circuit", which is an original ROHM technology, can reduce various switching noise (ex. No-signal, low frequency like 20Hz & large signal inputs). Also, "Advanced switch" makes control of microcomputer easier, and can construct a high quality car audio system. Features Reduced switching noise of input gain control, mute, main volume, fader volume, bass, middle, treble, loudness, mixing by using advanced switch circuit. Built-in differential input selector that can make various combination of single-ended / differential input. Built-in ground isolation amplifier inputs, which is ideal for external stereo input. Built-in input gain controller reduces switching noise for volume of a portable audio input. Decreased number of external components due to built-in 3-band equalizer filter and loudness filter. It is possible to control Q, GV, fO of 3-band equalizer through I2C BUS control. It is possible to adjust the gain of the bass, middle, treble up to 20dB with 1 dB step gain adjustment. It is equipped with output terminals for Subwoofer. Moreover, the stereo signal output of the front and rear can also be chosen by the I2C BUS control. Built-in mixing input. Energy-saving design resulting in low-current consumption is achieved by utilizing the Bi-CMOS process. It has the advantage in quality over scaling down the power heat control of the internal regulators. Input terminals and output terminals are organized and separately laid out to keep the signal flow in one direction which results in simpler and smaller PCB layout. It is possible to control the I2C BUS by 3.3V / 5V. Power Supply Voltage Range: Circuit Current (No signal): Total Harmonic Distortion 1: (FRONT,REAR) Total Harmonic Distortion 2: (SUBWOOFER) Maximum Input Voltage: Cross-talk Between Selectors: Volume Control Range: Output Noise Voltage 1: (FRONT,REAR) Output Noise Voltage 2: (SUBWOOFER) Residual Output Noise Voltage: Operating Temperature Range: Package 7.0V to 9.5V 38mA(Typ) 0.001%(Typ) 0.002%(Typ) 2.3Vrms(Typ) -100dB(Typ) +15 dB to -79dB 3.8Vrms(Typ) 4.8Vrms(Typ) 1.8Vrms(Typ) -40C to +85C W(Typ) x D(Typ) x H(Max) SSOP-A32 13.60mm x 7.80mm x 2.01mm Applications It is optimal for car audio systems. It can also be used for audio equipment of mini Compo, micro Compo, TV, etc. Product structureSilicon monolithic integrated circuit www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211114001 This product has no designed protection against radioactive rays 1/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Typical Application Circuit BD37541FS TOP VIEW Pin Configuration A1 1 32 FIL A2 2 31 GND B1 3 30 SDA B2 4 29 SCL C1 5 28 VCC C2 6 27 OUTF1 DP1 7 26 OUTF2 DN 8 25 OUTR1 9 24 OUTR2 EP1 10 23 OUTS1 EN1 11 22 OUTS2 EN2 12 21 TEST EP2 13 20 N.C. MIN 14 19 MUTE LDA1 15 18 LDA2 LDB1 16 17 LDB2 DP2 Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name A1 A2 B1 B2 C1 C2 DP1 DN DP2 EP1 EN1 EN2 EP2 MIN LDA1 LDB1 Description Pin No. A input terminal of 1ch A input terminal of 2ch B input terminal of 1ch B input terminal of 2ch C input terminal of 1ch C input terminal of 2ch D positive input terminal of 1ch D negative input terminal D positive input terminal of 2ch E positive input terminal of 1ch E negative input terminal of 1ch E negative input terminal of 2ch E positive input terminal of 2ch Mixing input terminal Loudness setting terminal of 1ch Loudness setting terminal of 1ch www.rohm.co.jp (c) m 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2/33 Pin Name LDB2 LDA2 MUTE N.C. TEST OUTS2 OUTS1 OUTR2 OUTR1 OUTF2 OUTF1 VCC SCL SDA GND FIL Description Loudness setting terminal of 2ch Loudness setting terminal of 2ch External compulsory mute terminal No Connection Test Pin Subwoofer output terminal of 2ch Subwoofer output terminal of 1ch Rear output terminal of 2ch Rear output terminal of 1ch Front output terminal of 2ch Front output terminal of 1ch Power supply terminal I2C Communication clock terminal I2C Communication data terminal GND terminal VCC/2 terminal TSZ02201-0C2C0E100560-1-1 16.Dec.2015 Rev.001 BD37541FS Block Diagram 30 29 28 27 26 25 Fader 31 Fader 32 24 23 22 21 20 19 18 17 14 15 16 VCC VCC/2 GND I2C BUS LOGIC Fader Fader Fader Fader Fader Gain:0dB to -79dB/1dB stepstep Gain:0dB-79B/1dB no pop noise Loudness Loudness Gain: 20dB to 0dB/1dB step Gain:20dB0B/1B step no pop noise 3 Band P-EQ (Tone control) Gain: +20dB to -20dB/1dB stepstep Gain+20dB-20dB/1dB no pop noise Bassf0=60/80/100/120Hz Q=0.5/1.0/1.5/2.0 Meddle:f0=500/1k/1.5k/2.5kHz Q=0.75/1/1.25/1.5 Treblef0=7.5k/10k/12.5k/15kHz Q=0.75/1.25 Volume Gain: +15dB to -79dB/1dB stepstep Gain+15dB-79dB/1dB no pop noise Input Gain Gain: +20dB to -0dB/1dB step Gain+20dB0dB/1dB step no pop noise Loudness 3 Band P-EQ (Tone control) Volume/Mute Input Gain Input selector (3 single-end and 2 stereo ISO) GND ISO amp 100k 1 100k 2 100k 3 100k 4 www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 100k 5 100k 6 GND ISO amp 250k 7 250k 8 3/33 GND ISO amp 250k 9 250k 10 GND ISO amp 250k 11 250k 12 250k 13 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Absolute Maximum Ratings (Ta=25C) Parameter Symbol Rating Unit Power Supply Voltage VCC 10.0 V Input Voltage VIN VCC+0.3 to GND-0.3 V Power Dissipation Pd Storage Temperature 0.95 Tstg (Note 1) W -55 to +150 C (Note 1) When mounted on the standard board (70 x 70 x 1.6 mm3), derate by 7.6mW/C for Ta above 25C. Thermal resistance ja = 131.6(C/W) Material : A FR4 grass epoxy board(3% or less of copper foil area Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum ratings. Recommended Operating Conditions Parameter Symbol Min Typ Max Unit Power Supply Voltage VCC 7.0 - 9.5 V Temperature Topr -40 - +85 C Electrical Characteristics GENERAL BLOCK (Unless specified, Ta=25C, VCC=8.5V, f=1kHz, VIN=1Vrms, Rg=600, RL=10k, A1 input, Input gain 0dB, Mute OFF, Volume 0dB, Tone control 0dB, Loudness 0dB, Mixing OFF, Fader 0dB) Limit Parameter Unit Min Typ Max Conditions Circuit Current (No Signal) IQ 38 48 mA No signal Voltage Gain GV -1.5 0 +1.5 dB GV=20log(VOUT/VIN) Channel Balance CB -1.5 0 +1.5 dB CB = GV1-GV2 THD+N1 0.001 0.05 THD+N2 0.002 0.05 VNO1 3.8 15 Vrms VNO2 4.8 15 Vrms Residual Output Noise Voltage * VNOR 1.8 10 Vrms Crosstalk Between Channels * CTC -100 -90 dB RR -70 -40 dB VOUT=1Vrms BW=400Hz-30KHz VOUT=1Vrms BW=400Hz-30KHz Rg = 0 BW = IHF-A Rg = 0 BW = IHF-A Fader = -dB Rg = 0 BW = IHF-A Rg = 0 CTC=20log(VOUT/VIN) BW = IHF-A f=1kHz VRR=100mVrms RR=20log(VCC IN/VOUT) Input Impedance(A, B,C) RIN_S 70 100 130 k Input Impedance(D, E) RIN_D 175 250 325 k Maximum Input Voltage VIM 2.1 2.3 Vrms Crosstalk Between Selectors * CTS -100 -90 dB CMRR 50 65 dB Total Harmonic Distortion 1 (FRONT,REAR) Total Harmonic Distortion 2 (SUBWOOFER) Output Noise Voltage 1 (FRONT,REAR) * Output Noise Voltage 2 (SUBWOOFER) * Ripple Rejection INPUT SELECTOR Symbol Common Mode Rejection Ratio * www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 4/33 VIM at THD+N(VOUT)=1 BW=400Hz-30KHz Rg = 0 CTS=20log(VOUT/VIN) BW = IHF-A XP1 and XN input XP2 and XN input CMRR=20log(VIN/VOUT) BW = IHF-A,[*X...D,E] TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS MIXING TREBLE MIDDLE BASS VOLUME MUTE INPUT GAIN BLOCK Electrical Characteristics - continued Limit Parameter Symbol Unit Min Typ Max Conditions Input gain 0dB VIN=100mVrms GIN=20log(VOUT/VIN) Input gain 20dB VIN=100mVrms GIN=20log(VOUT/VIN) Minimum Input Gain GIN_MIN -2 0 +2 dB Maximum Input Gain GIN_MAX 18 20 22 dB Gain Set Error GIN_ERR -2 0 +2 dB Mute Attenuation * GMUTE -105 -85 dB Maximum Gain GV_MAX 13 15 17 dB Maximum Attenuation * GV_MIN -100 -85 dB Attenuation Set Error 1 GV_ERR1 -2 0 +2 dB GAIN & ATT=+15dB to -15dB Attenuation Set Error 2 GV_ERR2 -3 0 +3 dB ATT=-16dB to -47dB Attenuation Set Error 3 GV_ERR3 -4 0 +4 dB ATT=-48dB to -79dB Maximum Boost Gain GB_BST 18 20 22 dB Maximum Cut Gain GB_CUT -22 -20 -18 dB Gain Set Error GB_ERR -2 0 +2 dB Maximum boost gain GM_BST 18 20 22 dB Maximum cut gain GM_CUT -22 -20 -18 dB Gain set error GM_ERR -2 0 +2 dB Maximum Boost Gain GT_BST 18 20 22 dB Maximum Cut Gain GT_CUT -22 -20 -18 dB Gain Set Error GT_ERR -2 0 +2 dB Input Impedance RIN_M 19 27 35 k Maximum Input Voltage VIM_M 2.0 2.2 Vrms GMX_MIN -100 -85 dB Maximum Attenuation www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 5/33 GAIN=+1dB to +20dB Mute ON GMUTE=20log(VOUT/VIN) BW = IHF-A Volume = 15dB VIN=100mVrms GV=20log(VOUT/VIN) Volume = -DB GV=20LOG(VOUT/VIN) BW = IHF-A Gain=+20dB f=100Hz VIN=100mVrms GB=20log (VOUT/VIN) Gain=-20dB f=100Hz VIN=2Vrms GB=20log (VOUT/VIN) Gain=-20dB to +20dB f=100Hz Gain=+20dB f=1kHz VIN=100mVrms GM=20log (VOUT/VIN) Gain=-20dB f=1kHz VIN=2Vrms GM=20log (VOUT/VIN) Gain=-20dB to +20dB f=1kHz Gain=+20dB f=10kHz VIN=100mVrms GT=20log (VOUT/VIN) Gain=-20dB f=10kHz VIN=2Vrms GT=20log (VOUT/VIN) Gain=-20dB to +20dB f=10kHz VIM at THD+N(VOUT)=1 BW=400Hz-30KHz MIX=OFF GMX=20log(VOUT/VIN) BW=INF-A TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS LOUDNE SS FADER / SUBWOOFER BLOCK Electrical Characteristics - continued Limit Parameter Symbol Unit Min Typ Max Conditions Maximum Attenuation * GF_MIN -100 -90 dB Fader = -dB GF=20log(VOUT/VIN) BW = IHF-A Attenuation Set Error 1 GF_ERR1 -2 0 +2 dB ATT=-1dB to -15dB Attenuation Set Error 2 GF_ERR2 -3 0 +3 dB ATT=-16dB to -47dB Attenuation Set Error 3 GF_ERR3 -4 0 +4 dB ATT=-48dB to -79dB Output Impedance ROUT 50 VIN=100mVrms Maximum Output Voltage VOM 2 2.2 Vrms Maximum Gain GL_MAX 17 20 23 dB Gain Set Error GL_ERR -2 0 +2 dB THD+N=1 BW=400Hz-30KHz Gain 20dB VIN=100mVrms GL=20log(VOUT/VIN) GAIN=+1dB to +20dB VP-9690A(Average value detection, effective value display) filter by Matsushita Communication is used for * measurement. Phase between input / output is same. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 6/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS 20 10 0 0 2 4 6 8 1 100Hz 0.1 0.1 0.01 0.01 0.001 0.001 10 0.001 0.01 0.1 1 10 Output Voltage : VOUT [Vrms] Power Supply Voltage : VCC [V] VCC[V] Figure 2. Thd vs Vo Vout (V) Figure 1. Circuit Current (No Signal) vs Power Supply Voltage Figure 2. Total Harmonic Distortion vs Output Voltage 5 4 3 25 20 15 10 5 2 Gain=0dB Bass Gain [dB] Gain (dB) 1 10kHz 1kHz 1 0 -1 -2 -3 -4 -5 10 100 1k 10k 100k 0 -5 -10 -15 -20 -25 10 Frequency (Hz) 100 1k 10k 100k Frequency [Hz] Figure 3. Gain vs Frequency www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 BASS GAIN : -20dB to +20dB /1dB step fO : 60Hz Q : 0.5 Figure 4. Bass Gain vs Frequency Figure 4. Bass Gain vs Freq 7/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 Vout 30 10 VIN [Vrms] 40 10 Total Harmonic Distortion : THD+N [%] 50 THD+N (%) Iq[mA] Circuit Current (No Signal) : IQ [mA] Typical Performance Curves BD37541FS Typical Performance Curves - continued 25 20 15 10 5 fO : 60/80/100/120Hz BASS GAIN : 20dB Q : 0.5 10 5 0 -5 -10 Gain [dB] Gain [dB] 25 20 15 -15 -20 -25 10 100 1k 10k Q : 0.5/1/1.5/2 BASS GAIN : 20dB fO : 60Hz 0 -5 -10 -15 -20 -25 100k 10 100 Figure Frequency 5. Bass fo vs Freq [Hz] MIDDLE GAIN : -20dB to +20dB /1dB step fO: 500Hz Q : 0.75 10 100 1k 10k 100k 25 20 15 10 5 100k 0 -5 -10 -15 -20 -25 fO : 500/1k/1.5k/2.5kHz MIDDLE GAIN : 20dB Q : 0.75 10 100 1k 10k 100k Frequency [Hz] Frequency [Hz] Figure 7. Middle Gain vs Frequency www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 10k Figure 6. Bass Q vs Frequency Gain [dB] Middle Gain [dB] Figure 5. Bass fO vs Frequency 25 20 15 10 5 0 -5 -10 -15 -20 -25 1k Frequency [Hz] Figure 8. Middle fO vs Frequency 8/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS 25 20 15 10 5 0 -5 -10 -15 -20 -25 25 Q : 0.75/1/1.25/1.5 Gain (dB) MIDDLE GAIN : 20dB fO : 500Hz 10 100 1k 10k TREBLE GAIN:-20dB to +20dB /1dB step fO : 7.5kHz Q : 0.75 20 Treble Gain [dB] Gain [dB] Typical Performance Curves - continued 15 10 5 0 -5 -10 -15 -20 -25 10 100k 100 10k 100k Frequency [Hz] Frequency [Hz] Frequency (Hz) Figure 10. Treble Gain vs Frequency Figure 9. Middle Q vs Frequency 25 25 fO : 7.5k/10k/12.5k/15kHz TREBLE GAIN : 20dB Q : 0.75 20 15 Q : 0.75/1.25 TREBLE GAIN : 20dB fO : 7.5kHz 20 15 10 10 5 Gain[dB] (dB) Gain Gain [dB] 1k 0 -5 5 0 -10 -5 -10 -15 -15 -20 -20 -25 -25 10 100 1k 10k 100k 10 Frequency (Hz) 100 1k 10k 100k Frequency [Hz] Frequency (Hz) Figure 11. Treble fO vs Frequency www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 Figure 12. Treble Q vs Frequency 9/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Typical Performance Curves - continued 1000 Din-Audio [uVrms] Output Noise [Vrms] Output Noise [Vrms] [uVrms] 1000 IHF-A 100 10 DIN-Audio 100 10 1 1 -80 -70 -60 -50 -40 -30 -20 -10 0 Volume Gain[dB] Gain [dB] Volume 10 20 -20 -15 -10 -5 5 10 15 20 Figure 14. Output Noise vs Bass Gain 1000 IHF-A Output Noise [Vrms] DIN-Audio [uVrms] 1000 [uVrms] 0 BassGain Gain[dB] [dB] Bass Figure 13. Output Noise vs Volume Gain Output Noise [Vrms] IHF-A 100 10 DIN-Audio IHF-A 100 10 1 1 -20 -15 -10 -5 0 5 10 15 20 Treble TrebleGain Gain[dB] [dB] -20 -15 -10 -5 0 5 10 15 20 Middle Gain[dB] [dB] Middle Gain Figure 16. Output Noise vs Treble Gain Figure 15. Output Noise vs Middle Gain www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 10/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Typical Performance Curves - continued 2.5 0 [Vrms] Output Voltage : VOUT [Vrms] Gain (dB) Gain [dB] -10 -20 -30 -40 -50 -60 -70 2.0 1.5 1.0 0.5 0.0 10 100 1k 10k 100k 100 Frequency [Hz] Frequency (Hz) 1000 10000 RLOAD [ohm] [ohm] 100000 Figure 17. CMRR vs Frequency Figure 18. Output Voltage vs RLOAD Figure 19. Advanced Switch 1 Figure 20. Advanced Switch 2 www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 11/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Timing Chart CONTROL SIGNAL SPECIFICATION (1) Electrical Specifications and Timing for Bus Lines and I/O Stages SDA tBUF tLOW tHD;STAT tF t R tSP SCL tHD;STA P tHD;DAT tHIGH tSU;DAT tSU;STAT tSU;STOT Sr S P Figure 21. I2C-bus Signal Timing Diagram Table 1 Characteristics of the SDA and SCL bus lines for I2C-bus devices (Ta=25C, VCC=8.5V) Fast-mode I2C-bus Parameter Symbol Min Max 400 1 SCL clock frequency fSCL 0 2 Bus free time between a STOP and START condition tBUF 1.3 Hold time (repeated) START condition. After this period, the first clock 3 tHD;STA 0.6 pulse is generated 4 LOW period of the SCL clock tLOW 1.3 5 HIGH period of the SCL clock tHIGH 0.6 6 Set-up time for a repeated START condition tSU;STA 0.6 7 Data hold time: tHD;DAT 0.06(Note) 8 Data set-up time tSU;DAT 120 9 Set-up time for STOP condition tSU;STO 0.6 Unit kHz S S S S S S ns S All values refer to VIH Min and VIL Max Levels (see Table 2). (Note) A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the VIH Min of the SCL signal) in order to bridge the undefined region of the falling edge of SCL. For 7(tHD;DAT), 8(tSU;DAT), make the setup in which the margin is full. Table 2 Characteristics of the SDA and SCL I/O stages for I2C-bus devices Parameter 10 11 12 13 14 Symbol LOW level input voltage: HIGH level input voltage: Pulse width of spikes which must be suppressed by the input filter. LOW level output voltage: at 3mA sink current Input current each I/O pin with an input voltage between 0.4V and 4.5V. tHD;STA HD;STA :2s 2us tHD;DAT HD;DAT :1s 1us VIL VIH tSP VOL1 II tSU;DAT SU;DAT 1us :1s Fast-mode devices Min -0.3 2.3 0 0 -10 Max +1 5 50 0.4 +10 Unit V V ns V A tSU;STO SU;STO 2us :2s SCL SCL BUF tBUF 4us :2s tHIGH HIGH 1us :1s LOW tLOW 3us :3s SDA SDA SCL : 250kHz SCL clock clockfrequency frequency250kHz Figure 22. A Command Timing Example in the I2C Data Transmission www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 12/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS (2) I2C BUS FORMAT S 1bit MSB LSB Slave Address 8bit S Slave Address A Select Address Data P MSB LSB MSB LSB A Select Address A Data A P 1bit 8bit 1bit 8bit 1bit 1bit = Start condition (Recognition of start bit) = Recognition of slave address. The first 7 bits correspond to the slave address. The least significant bit is "L" which corresponds to write mode. = ACKNOWLEDGE bit (Recognition of acknowledgement) = Select address corresponding to volume, bass or treble. = Data on every volume and tone. = Stop condition (Recognition of stop bit) (3) I2C BUS Interface Protocol (a) Basic Format S Slave Address A Select Address A Data A MSB LSB MSB LSB MSB LSB P (b) Automatic Increment (Select Address increases (+1) according to the number of data.) Slave Address A Select Address A Data1 A Data2 A MSB LSB MSB LSB MSB LSB MSB LSB (Example) Data1 shall be set as data of address specified by Select Address. Data2 shall be set as data of address specified by Select Address +1. DataN shall be set as data of address specified by Select Address +N-1. S DataN MSB (c) Configuration Unavailable for Transmission (In this case, only Select Address1 is set.) S Slave Address A Select Address1 A Data A Select Address 2 A Data A MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB (Note) If any data is transmitted as Select Address 2 next to data, it is recognized as data, not as Select Address 2. A P LSB P (4) Slave Address MSB A6 1 A5 0 www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 A4 0 A3 0 A2 0 13/33 A1 0 A0 0 LSB R/W 0 80H TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS (5) Select Address & Data Select Address (hex) Items Data MSB D7 D6 Initial setup 1 01 Advanced switch ON/OFF 0 D5 D4 Advanced switch time of Input Gain/Volume Tone/Fader/Loudness Mixing Subwoofer Output Select LSB D3 D2 0 1 0 0 0 0 0 0 1 0 Initial setup 2 02 0 0 Initial setup 3 03 0 0 Input Selector 05 0 0 Input selector Input gain 06 0 Full-diff Type Mute ON/OFF 0 0 Input Gain Volume gain Fader 1ch Front Fader 2ch Front Fader 1ch Rear Fader 2ch Rear Fader Subwoofer Mixing Bass setup Middle setup Treble setup 20 28 29 2A 2B 2C 30 41 44 47 Bass gain 51 Middle gain 54 Treble gain 57 Loudness Gain System Reset 75 FE 0 0 0 Bass Boost/ Cut Middle Boost/ Cut Treble Boost/ Cut 0 1 0 Volume Gain / Attenuation Fader Attenuation Fader Attenuation Fader Attenuation Fader Attenuation Fader Attenuation Mixing ON / OFF Bass fO 0 Middle fO 0 Treble fO 0 0 0 0 0 Bass Gain 0 0 Middle Gain 0 0 Treble Gain 0 0 D0 Advanced switch time of Mute 0 0 0 0 Loudness Hicut 0 0 D1 Bass Q Middle Q 0 Treble Q Loudness Gain 0 0 1 Advanced switch Note 1. The Advance Switch works in the latch part while changing from one function to another. 2. Upon continuous data transfer, the Select Address rolls over because of the automatic increment function, as shown below. 01020305062028292A2B2C 3041444751545775 3. Advance switch is not used for the function of input selector, subwoofer output select etc. Therefore, please apply mute on the side when changing these settings. 4. When using mute function of this IC at the time of changing input selector, please switch mute ON/OFF for waiting advanced-mute time. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 14/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Select address 01 (hex) Time MSB D7 0.6msec 1.0msec 1.4msec 3.2msec Advanced Switch ON/OFF Time MSB D7 4.7 msec 7.1 msec 11.2 msec 14.4 msec Advanced Switch ON/OFF Mode MSB D7 OFF 0 ON 1 Advanced switch time of Mute D6 D5 D4 D3 D2 D1 0 Advanced switch time 0 of Input gain/Volume 0 0 1 Tone/Fader/Loudness 1 Mixing 1 LSB D0 0 1 0 1 Advanced switch time of Input gain/Volume/Tone/Fader/ LSB Loudness/Mixing D6 D5 D4 D3 D2 D1 D0 0 0 0 1 Advanced switch 0 0 1 Time of Mute 1 0 1 1 D6 0 Advanced switch ON/OFF LSB D5 D4 D3 D2 D1 D0 Advanced switch time of Input gain/Volume Advanced switch 0 1 Tone/Fader/Loudness Time of Mute Mixing Select address 02(hex) Mode MSB D7 D6 Sub Front Rear Prohibition 0 0 Subwoofer Output Select D5 D4 D3 D2 0 0 0 1 0 0 1 0 1 1 D1 LSB D0 0 0 : Initial Condition www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 15/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Select address 05(hex) MSB D7 Mode Input Selector D4 D3 0 0 0 0 0 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 OUTF1 OUTF2 D6 D5 D2 D1 A A1 A2 0 0 B B1 B2 0 0 C C1 C2 0 1 D single DP1 DP2 0 1 E1 single EP1 EN1 0 1 FullE2 single EN2 EP2 0 1 diff bias 0 0 type A diff A1 B1 1 1 select C diff B2 C2 0 0 D diff DP1 DP2 1 1 E full diff EP1 EP2 0 0 Input SHORT 0 0 Prohibition Other setting Input SHORT : The input impedance of each input terminal is lowered from 100k(Typ) to 6 k(Typ). (For quick charge of coupling capacitor) Mode Negative Input Bias MSB D7 0 1 D6 D5 0 0 Full-diff Bias Type Select D4 D3 D2 D1 LSB D0 0 1 0 1 0 1 1 0 0 0 1 LSB D0 Input Selector : Initial condition EP1 Negative input type 10 1ch 1ch signal input For Ground -isolation type. EN1 1ch Differential 11 EN2 12 EP2 2ch 2ch signal input Bias type For differential amplifier type 2ch Differential 13 EP1 1ch 10 1ch signal input EN1 1ch Differential 11 EN2 12 2ch 2ch signal input EP2 2ch Differential 13 www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 16/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Select address 06 (hex) Mode 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB 16dB 17dB 18dB 19dB 20dB MSB D7 Mute ON/OFF D6 D5 0 0 Input Gain D4 D3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 0 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 1 Mute ON/OFF D4 D3 D2 D1 1 Prohibition Mode OFF ON MSB D7 0 1 D6 D5 0 0 1 LSB D0 Input Gain : Initial condition www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 17/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Select address 20, 28, 29, 2A, 2B, 2C (hex) MSB Vol, Fader Gain Gain & ATT D7 D6 D5 D4 0 0 0 0 0 0 0 0 Prohibition 0 1 1 1 15dB 0 1 1 1 14dB 0 1 1 1 13dB 0 1 1 1 -77dB 1 1 0 0 -78dB 1 1 0 0 -79dB 1 1 0 0 1 1 0 1 Prohibition 1 1 1 1 -dB 1 1 1 1 (Only 0dB to -dB are available at address 28, 29, 2A, 2B,2C) / Attenuation D3 D2 D1 0 0 0 0 0 0 LSB D0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 1 1 1 0 1 1 1 0 0 1 1 0 1 0 1 0 1 1 1 1 1 1 0 1 D1 0 1 LSB D0 0 1 Select address 30(hex) Gain & ATT MIX ON MIX OFF MSB D7 1 1 D6 0 1 Mixing Gain / Attenuation D5 D4 D3 D2 0 0 0 0 1 1 1 1 Select address 41(hex) Q factor 0.5 1.0 1.5 2.0 fO 60Hz 80Hz 100Hz 120Hz MSB D7 D6 0 0 D5 D6 0 0 Q factor D3 D2 Bass fO MSB D7 Bass D4 D5 0 0 1 1 0 Bass D4 0 1 0 1 fO D3 0 0 LSB D1 0 0 1 1 D0 0 1 0 1 LSB D2 D1 D0 Bass Q factor 0 Select address 44(hex) Q factor 0.75 1.0 1.25 1.5 fO 500Hz 1kHz 1.5kHz 2.5kHz D7 D6 Middle D5 D4 0 0 Middle fO MSB MSB D7 D6 0 0 D5 0 0 1 1 Q factor D3 D2 0 Middle fO D4 D3 0 1 0 0 1 0 LSB D1 0 0 1 1 D0 0 1 0 1 LSB D2 0 D1 D0 Middle Q factor : Initial condition www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 18/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Select address 47 (hex) Q factor 0.75 1.25 fO 7.5kHz 10kHz 12.5kHz 15kHz D7 D6 Treble D5 D4 0 0 Treble fO MSB MSB D7 D6 0 0 D5 0 0 1 1 Q factor D3 D2 0 Treble D4 0 1 0 1 fO D3 0 LSB D1 D0 0 1 0 0 D2 D1 D0 0 0 Treble Q factor D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 LSB Select address 51, 54, 57 (hex) Gain 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB 16dB 17dB 18dB 19dB 20dB MSB Bass/Middle/Treble Gain D7 D6 D5 Bass/ Middle/ Treble Boost /cut 0 0 D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Prohibition Mode Boost Cut MSB D7 0 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 LSB Bass/Middle/Treble Boost/Cut D6 D5 D4 D3 D2 D1 0 0 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 LSB D0 Bass/Middle/Treble Gain :Initial condition www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 19/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Select address 75 (hex) MSB D7 Mode Hicut1 Hicut2 Hicut3 Hicut4 0 MSB Gain D7 0dB 1dB 2dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB 16dB 17dB 18dB 19dB 20dB 0 Prohibition D6 0 0 1 1 D5 0 1 0 1 Loudness Hicut D4 D3 D2 LSB D0 Loudness Gain Loudness Gain D4 D3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 Loudness Hicut 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 1 D6 D1 D5 LSB D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 : Initial condition (6) About Power ON Reset Built-in IC initialization is made during power ON of the supply voltage. Please send initial data to all addresses at supply voltage on. And please turn ON mute until this initial data is sent. Parameter Rise Time of VCC VCC Voltage of Release Power ON Reset Symbol Limit Unit Min Typ Max tRISE 33 sec VPOR 4.1 V Conditions VCC rise time from 0V to 5V (7) About External Compulsory Mute Terminal It is possible to force mute externally by setting an input voltage to the MUTE terminal. Mute Voltage Condition Mode GND to 1.0V MUTE ON 2.3V to VCC MUTE OFF Establish the voltage of MUTE in the condition you want to set. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 20/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Application Information 1. Function and Specifications Function Specifications Stereo input Input selector Input gain Mute Volume Single-End/Diff/Full-Diff (Possible to set the number of single-end/diff/full-diff as follows ) Single-End Differential Full-Differential Mode 1 0 3 1 Mode 2 1 2 1 Mode 3 3 1 1 Mode 4 4 0 1 Mode 5 5 1 0 Mode 6 6 0 0 Table.1 Combination of input selector +20dB to 0dB (1dB step) Possible to use "Advanced switch" for prevention of switching noise. Possible to use "Advanced switch" for prevention of switching noise. +15dB to -79dB (1dB step), -dB Possible to use "Advanced switch" for prevention of switching noise. +20dB to -20dB (1dB step) Bass Q=0.5, 1, 1.5, 2 fO =60, 80, 100, 120Hz Possible to use "Advanced switch" for prevention of switching noise. +20dB to -20dB (1dB step) Middle Q=0.75, 1, 1.25, 1.5 fO=500, 1k, 1.5k 2.5kHz Possible to use "Advanced switch" for prevention of switching noise. +20dB to -20dB (1dB step) Treble Q=0.75, 1.25 fO=7.5k, 10k, 12.5k, 15kHz Possible to use "Advanced switch" for prevention of switching noise. Fader Loudness 0dB to -79dB, -dB Possible to use "Advanced switch" for prevention of switching noise. 20dB to 0dB(1dB step) Possible to use "Advanced switch" for prevention of switching noise. Monaural input Mixing 0dB/-dB Possible to use "Advanced switch" for prevention of switching noise. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 21/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS 2. Volume / Fader Volume Attenuation Data (dB) D7 D6 D5 D4 D3 D2 +15 0 1 1 1 0 0 +14 0 1 1 1 0 0 +13 0 1 1 1 0 0 +12 0 1 1 1 0 1 +11 0 1 1 1 0 1 +10 0 1 1 1 0 1 +9 0 1 1 1 0 1 +8 0 1 1 1 1 0 +7 0 1 1 1 1 0 +6 0 1 1 1 1 0 +5 0 1 1 1 1 0 +4 0 1 1 1 1 1 +3 0 1 1 1 1 1 +2 0 1 1 1 1 1 +1 0 1 1 1 1 1 0 1 0 0 0 0 0 -1 1 0 0 0 0 0 -2 1 0 0 0 0 0 -3 1 0 0 0 0 0 -4 1 0 0 0 0 1 -5 1 0 0 0 0 1 -6 1 0 0 0 0 1 -7 1 0 0 0 0 1 -8 1 0 0 0 1 0 -9 1 0 0 0 1 0 -10 1 0 0 0 1 0 -11 1 0 0 0 1 0 -12 1 0 0 0 1 1 -13 1 0 0 0 1 1 -14 1 0 0 0 1 1 -15 1 0 0 0 1 1 -16 1 0 0 1 0 0 -17 1 0 0 1 0 0 -18 1 0 0 1 0 0 -19 1 0 0 1 0 0 -20 1 0 0 1 0 1 -21 1 0 0 1 0 1 -22 1 0 0 1 0 1 -23 1 0 0 1 0 1 -24 1 0 0 1 1 0 -25 1 0 0 1 1 0 -26 1 0 0 1 1 0 -27 1 0 0 1 1 0 -28 1 0 0 1 1 1 -29 1 0 0 1 1 1 -30 1 0 0 1 1 1 -31 1 0 0 1 1 1 -32 1 0 1 0 0 0 Fader Volume only 0dB to -dB are available. D1 D0 (dB) D7 D6 D5 D4 D3 D2 D1 D0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 -33 -34 -35 -36 -37 -38 -39 -40 -41 -42 -43 -44 -45 -46 -47 -48 -49 -50 -51 -52 -53 -54 -55 -56 -57 -58 -59 -60 -61 -62 -63 -64 -65 -66 -67 -68 -69 -70 -71 -72 -73 -74 -75 -76 -77 -78 -79 - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 Initial condition www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 22/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS 3. Application Circuit FIL GND SDA SCL 10 VCC MUTE OUTF1 OUTF2 OUTR1 OUTR2 OUTS1 OUTS2 0.1 10 10 10 10 10 10 10 TEST 30 29 28 27 26 25 Fader 31 Fader 32 24 23 22 21 20 19 18 17 14 15 16 VCC VCC/2 GND I2C BUS LOGIC Fader Fader Fader Fader Fader Gain:0dB to -79dB/1dB stepstep Gain:0dB-79B/1dB no pop noise Loudness Loudness Gain: 20dB to 0dB/1dB step Gain:20dB0B/1B step no pop noise 3 Band P-EQ (Tone control) Gain+20dB-20dB/1dB Gain: +20dB to -20dB/1dB step step no pop noise Bassf0=60/80/100/120Hz Q=0.5/1.0/1.5/2.0 Meddle:f0=500/1k/1.5k/2.5kHz Q=0.75/1/1.25/1.5 Treblef0=7.5k/10k/12.5k/15kHz Q=0.75/1.25 Volume Gain+15dB-79dB/1dB Gain: +15dB to -79dB/1dB stepstep no pop noise Input Gain Gain+20dB0dB/1dB step Gain: +20dB to -0dB/1dB step no pop noise Loudness 3 Band P-EQ (Tone control) Volume/Mute Input Gain Input selector (3 single-end and 2 stereo ISO) GND ISO amp 100k 1 100k 2 2.2 100k 3 2.2 Single1 GND Isolation2 100k 4 2.2 100k 5 2.2 Single2 100k 6 2.2 250k 7 2.2 Single3 GND Isolation3 (Note) About single inputIsolation2,3 1 to 3, it is possible to change from Single13GND singleAbout input to GNDinput Isolation 2,3. single 13,input it is possible to change from 1 to input 3 single input to GND Isolation 2,3. GND ISO amp 250k 8 2.2 GND ISO amp 250k 10 9 10 250k 2.2 GND Isolation1 or Single4 GND ISO amp 250k 11 2.2 250k 12 10 250k 13 2.2 Full Differential or Single5, Single6 2.2 2.2 MIN (Note) GNDFull Isolation1 and Full Differential, it is possible to GND About Isolation1, DifferentialSingle46 change from Isolation1 differentialand input single inputit4istopossible 6. About GND FulltoDifferential, to change from differential input to single input 46. Unit R : [] C : [F] Figure 23. BD37541FS Notes on wiring Please connect the decoupling capacitor of the power supply in the shortest possible distance to GND. GND lines should be one-point connected. Wiring pattern of Digital should be away from that of Analog unit and crosstalk should not be acceptable. SCL and SDA lines of I2C BUS should not be parallel if possible. The lines should be shielded, if they are adjacent to each other. Analog input lines should not be parallel if possible. The lines should be shielded, if they are adjacent to each other. About TEST pin (Pin 21), please leave it OPEN. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 23/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Power Dissipation About the thermal design of the IC Characteristics of an IC have a great deal to do with the temperature at which it is used, and exceeding absolute maximum ratings may degrade and destroy elements. Careful consideration must be given to the heat of the IC from the two standpoints of immediate damage and long-term reliability of operation. Reference data SSOP-A32 1.5 measurement Condition : ROHM Standard board board Size : 70 x 70 x 1.6(mm3) material : A FR4 grass epoxy board (3% or less of copper foil area) Power Dissipation : Pd (W) 0.95W 1.0 ja = 131.6C/W 0.5 0.0 0 25 50 75 85 100 125 150 Ambient Temperature : Ta (C) Figure 24. Temperature Derating Curve (Note) Values are actual measurements and are not guaranteed. Power dissipation values vary according to the board on which the IC is mounted. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 24/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS I/O Equivalent Circuits Terminal No. Terminal Name Terminal Voltage Equivalent Circuit Terminal Description A terminal for signal input. The input impedance is 100k (typ). VCC 1 A1 2 A2 3 B1 4 B2 5 C1 6 C2 4.25 100K GND Input terminal available to Single/Differential mode. The input impedance is 250k (typ). VCC Vcc 7 DP1 8 DN 9 DP2 10 EP1 11 EN1 12 EN2 13 EP2 4.25 250 250K GND GND The loudness characteristic setting terminal. VCC 15 LDA1 18 LDA2 4.25 1.65V GND The loudness characteristic setting terminal. VVCC CC 16 LDB1 17 LDB2 4.25 GND GND A terminal for external compulsory mute. If terminal voltage is High level, the mute is OFF. And if the terminal voltage is Low level, the mute is on. VCC 0.58xVCC 250K 19 MUTE 1.65V GND Values in the pin explanation and input/output equivalent circuit are reference values only and are not guaranteed. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 25/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS I/O Equivalent Circuits - continued Terminal No. Terminal Name Terminal Voltage Equivalent Circuit Terminal Description A terminal for fader and Subwoofer output. VCC 22 OUTS2 23 OUTS1 24 OUTR2 25 OUTR1 26 OUTF2 27 OUTF1 28 VCC 4.25 GND Power supply terminal. 8.5 A terminal for clock input of I2C BUS communication. VCC 29 SCL 1.65V GND A terminal for data input of I2C BUS communication. VCC 30 SDA 1.65V GND Ground terminal. 31 GND 0 1/2 VCC terminal. Voltage for reference bias of analog signal system. The simple precharge circuit and simple discharge circuit for an external capacitor are built in. VCC 50k 32 FIL 4.25 50k GND VCC 14 MIN A terminal for signal input. The input impedance is 27k (Typ). 4.25 27K GND 21 TEST - TEST terminal Values in the pin explanation and input/output equivalent circuit are reference values only and are not guaranteed. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 26/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Operational Notes 1. Reverse Connection of Power Supply Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when connecting the power supply, such as mounting an external diode between the power supply and the IC's power supply pins. 2. Power Supply Lines Design the PCB layout pattern to provide low impedance supply lines. Separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog block. Furthermore, connect a capacitor to ground at all power supply pins. Consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. Ground Voltage Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition. 4. Ground Wiring Pattern When using both small-signal and large-current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal ground caused by large currents. Also ensure that the ground traces of external components do not cause variations on the ground voltage. The ground lines must be as short and thick as possible to reduce line impedance. 5. Thermal Consideration Should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. In case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the Pd rating. 6. Recommended Operating Conditions These conditions represent a range within which the expected characteristics of the IC can be approximately obtained. The electrical characteristics are guaranteed under the conditions of each parameter. 7. Inrush Current When power is first supplied to the IC, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the IC has more than one power supply. Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. Operation Under Strong Electromagnetic Field Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction. 9. Testing on Application Boards When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may subject the IC to stress. Always discharge capacitors completely after each process or step. The IC's power supply should always be turned off completely before connecting or removing it from the test setup during the inspection process. To prevent damage from static discharge, ground the IC during assembly and use similar precautions during transport and storage. 10. Inter-pin Short and Mounting Errors Ensure that the direction and position are correct when mounting the IC on the PCB. Incorrect mounting may result in damaging the IC. Avoid nearby pins being shorted to each other especially to ground, power supply and output pin. Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. 11. Unused Input Pins Input pins of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance and extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause unexpected operation of the IC. So unless otherwise specified, unused input pins should be connected to the power supply or ground line. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 27/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Operational Notes - continued 12. Regarding the Input Pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a parasitic diode or transistor. For example (refer to figure below): When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should be avoided. Resistor Transistor (NPN) Pin A Pin B C E Pin A N P+ P N N P+ N Pin B B Parasitic Elements N P+ N P N P+ B N C E Parasitic Elements P Substrate P Substrate GND GND Parasitic Elements GND Parasitic Elements GND N Region close-by Figure 25. Example of monolithic IC structure 13. About Signal Input (a) About Input Coupling Capacitor Constant Value The constant value of input coupling capacitor C(F) is decided with respect to the input impedance R IN() at the input signal terminal of the IC. The first HPF characteristic of RC is composed. GdB CF 0 RIN A(f) fHz INPUT A f 2 fCRIN 2 2 1 2 fCRIN (b) About the Input Selector SHORT SHORT mode is the command which makes switch SSH =ON of input selector part so that the input impedance RIN of all terminals becomes small. Switch SSH is OFF when SHORT command is not selected. The constant time brought about by the small resistance inside and the capacitor outside the LSI becomes small when this command is used. The charge time of the capacitor becomes short. Since SHORT mode turns ON the switch of SSH and makes it low impedance, please use it at no signal condition. www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 28/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Operational Notes - continued 14. About Mute Terminal (Pin 19) when Power Supply is OFF There should be no applied voltage across the Mute terminal (Pin 19) when power-supply is OFF. If in case voltage is supplied to mute terminal, please insert a series resistor (about 2.2k) to Mute terminal. (Please refer to Application Circuit Diagram.) 15. About TEST Pin TEST Pin should be left as OPEN. Pin 21 is TEST Pin. 16. About MIX About Specification of Fader - at MIX ON. Mix_signal is added to Main_signal after Fader_Gain(+15dB to -79dB) like the figure. When Fader is set at -, the signal after a MIX signal is added is done with MUTE because the - circuit of Fader is in the step after the addition circuit. +15dB to -79dB +7dB to -79dB Figure 26. About Front Fader and MIX www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 29/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Operational Notes - continued 17. About the External Parts Setting of Loudness Circuit This IC is equipped with a Loudness circuit. The Loudness gain is fixed inside the IC but its frequency characteristic can be changed freely by adjusting the external part filter. The circuit composition of the Loudness part is shown below. Incidentally, when not using the Loudness circuit, please short the pins between LDA1(Pin 15) and LDB1(Pin 16), and between LDA2(Pin 18) and LDB2(Pin 17), so as to avoid the inner amplifier inputs to become floating. Loudness LDA1 LDB1 15 LDB2 16 56k R2 17 18 56k R1 1000p 4.7k R1 1000p C1 R3 LDA2 C1 4.7k 4.7k 0.047 R2 4.7k R3 0.047 C2 C2 Figure 27. About the External Parts Setting of Loudness Circuit The Loudness frequency characteristics are decided according to Figure 27. G_LOUD can be made 20dB when external parts used are the same with Figure 27 (the recommended value). G_LOUD is the amount of effect of Loudness when Loudness Gain is set at 20dB (P.20). When Loudness frequency characteristics are changed, each parameter (Gain, Frequency) shown in Figure 27 can be decided using the following approximate equation below. (Note) Design fc2 value more than one digit bigger than fc1 to get effect on Loudness. Loudness cut-off frequency fc1 1 2C 2 R1 R 3 Hz fc2 1 2C1 R 2 R 3 Hz Loudness Gain (The amount of effect of Loudness) R3 G_LOUD 20 log R1 R3 dB R3 G_HICUT 20 log R // R R 3 1 2 www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 30/33 dB TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Ordering Information B D 3 7 5 Part Number 4 1 F S Package FS: SSOP-A32 - E2 Packaging and forming specification E2: Embossed tape and reel Marking Diagram SSOP-A32(TOP VIEW) Part Number Marking BD37541FS LOT Number 1PIN MARK www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 31/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Physical Dimension, Tape and Reel Information Package Name www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 SSOP-A32 32/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 BD37541FS Revision History Date Revision 16.Dec.2015 001 Changes New Release www.rohm.com (c) 2015 ROHM Co., Ltd. All rights reserved. TSZ2211115001 33/33 TSZ02201-0C2C0E100560-1-2 16.Dec.2015 Rev.001 Datasheet Notice Precaution on using ROHM Products 1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment, OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you (Note 1) , transport intend to use our Products in devices requiring extremely high reliability (such as medical equipment equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property ("Specific Applications"), please consult with the ROHM sales representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ROHM's Products for Specific Applications. (Note1) Medical Equipment Classification of the Specific Applications JAPAN USA EU CHINA CLASS CLASSb CLASS CLASS CLASS CLASS 2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM's Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation 4. The Products are not subject to radiation-proof design. 5. Please verify and confirm characteristics of the final or mounted products in using the Products. 6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in the range that does not exceed the maximum junction temperature. 8. Confirm that operation temperature is within the specified range described in the product specification. 9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / Circuit board design 1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products, please consult with the ROHM representative in advance. For details, please refer to ROHM Mounting specification Notice-PGA-E (c) 2015 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet Precautions Regarding Application Examples and External Circuits 1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics. 2. You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. Therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. Precaution for Electrostatic This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control). Precaution for Storage / Transportation 1. Product performance and soldered connections may deteriorate if the Products are stored in the places where: [a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [b] the temperature or humidity exceeds those recommended by ROHM [c] the Products are exposed to direct sunshine or condensation [d] the Products are exposed to high Electrostatic 2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period. 3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of which storage time is exceeding the recommended storage time period. Precaution for Product Label QR code printed on ROHM Products label is for ROHM's internal use only. Precaution for Disposition When disposing Products please dispose them properly using an authorized industry waste company. Precaution for Foreign Exchange and Foreign Trade act Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign trade act, please consult with ROHM in case of export. Precaution Regarding Intellectual Property Rights 1. All information and data including but not limited to application example contained in this document is for reference only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. 2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the Products with other articles such as components, circuits, systems or external equipment (including software). 3. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any third parties with respect to the Products or the information contained in this document. Provided, however, that ROHM will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the Products, subject to the terms and conditions herein. Other Precaution 1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM. 2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of ROHM. 3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the Products or this document for any military purposes, including but not limited to, the development of mass-destruction weapons. 4. The proper names of companies or products described in this document are trademarks or registered trademarks of ROHM, its affiliated companies or third parties. Notice-PGA-E (c) 2015 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet General Precaution 1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents. ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny ROHM's Products against warning, caution or note contained in this document. 2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior notice. Before purchasing or using ROHM's Products, please confirm the la test information with a ROHM sale s representative. 3. The information contained in this doc ument is provi ded on an "as is" basis and ROHM does not warrant that all information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. Notice - WE (c) 2015 ROHM Co., Ltd. All rights reserved. Rev.001 Datasheet bd37541fs - Web Page Buy Distribution Inventory Part Number Package Unit Quantity Minimum Package Quantity Packing Type Constitution Materials List RoHS bd37541fs SSOP-A32 2000 2000 Taping inquiry Yes