NJU7391
A
– 1
–
2-CHANNEL Audio Processor with eala surround
Q GENERAL DESCRIPTION QPACKAGE OUTLINE
The NJU7391A is a 2-channel Audio Processor with 5-in 1-out
stereo audio selector, 2-band Tone Control and eala surround.
The NJU7391A performs low noise and low distortion
characteristics with resistance ladder circuit.
All of functions are controlled via three-wired serial bus.
Q FEATURES
O Operating Voltage +4.7 to +9.7V
O Three-wired serial bus
O Low output noise -110dBVtyp.
O Low THD 0.002%typ. (Vo=1Vrms, Gv=0dB, f=1kHz)
0.01%typ. (Vo=2Vrms, Gv=0dB, f=1kHz)
0.01%typ (Vo=2Vrms, Gv=+6dB, f=10kHz)
O Input Selector(X5)
O Input Gain 0 to +14dB/2dBstep
O Volume 0 to -95.0dB / 1dBstep, MUTE
O Tone Control 0 to
±14dB/2dBstep
O eala Surround 3-level effects
O CMOS Technology
O Package Outline SSOP32
Q BLOCK DIAG RA M
NJU7391AV
32
31
30
27
26
25
24
23
29
28
20
19
18
17
22
21
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
bias
+
+
+
+
+
+
+
+
+
+
INPUT(Ach)
INPUT(Bch)
TRE
VOL
BASS
TRE
BASS
VOL
+ + OUTPUT(Bch)
OUTPUT(Ach)
3-wire
eala
+
V+ digi
V+ ana
1uF
1uF
6.8nF
47nF
220nF
5.6k
4.7nF
4.7uF
1uF
1uF
6.8nF
47nF
220nF
5.6k
4.7nF
4.7uF
4.7uF
DA TA
CLOCK
LATCH
V+
GND ana
GND digi
100uF
NJU7391A
– 2 –
QPIN CONFIGURATION
SSOP32
No. Symbol Function No Symbol Function
1 IN1A Ach Input1 Terminal 17 LATCH 3-Wired LATCH Input Terminal
2 IN2A Ach Input2 Terminal 18 V+ A Analog Supply Terminal
3 IN3A Ach Input3 Terminal 19 V+ D Digital Supply Terminal
4 IN4A Ach Input4 Terminal 20 VREF Reference Voltage Terminal
5 IN5A Ach Input5 Terminal 21 OUTB Bch Output Terminal
6 SELOUTA Ach Selector Output Terminal 22 SRB Bch Surround Filter Terminal
7 VOL1A Ach Volume Input Terminal 23 TONE-DBB Bch Bass(Tone) Filter Terminal
8 TONE-HA Ach Treble(Tone) Filter Terminal 24 TONE-BB Bch Bass(Tone) Filter Terminal
9 TONE-BA Ach Bass(Tone) Filter Terminal 25 TONE-HB Bch Treble(Tone) Filter Terminal
10 TONE-DBA Ach Bass(Tone) Filter Terminal 26 VOL1B Bch Volume Input Terminal
11 SRA Ach Surround Filter Terminal 27 SELOUTB Bch Selector Output Terminal
12 OUTA Ach Output Terminal 28 IN5B Bch Input5 Terminal
13 GND D Digital Ground Terminal 29 IN4B Bch Input4 Terminal
14 GND A Analog Ground Terminal 30 IN3B Bch Input3 Terminal
15 DATA 3-Wired DATA Input Terminal 31 IN2B Bch Input2 Terminal
16 CLOCK 3-Wired CLOCK Input Terminal 32 IN1B Bch Input1 Terminal
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
30
29
28
27
26
IN1
A
IN2
A
IN3
A
SELOUT
A
VOL1
A
IN4
A
IN5
A
TONE-H
TONE-B
A
TONE-DB
A
SR
A
OUT
A
GND D
GND
A
DAT
A
IN1B
IN2B
IN3B
SELOUTB
VOL1B
IN5B
TONE-HB
TONE-BB
TONE-DBB
SRB
25
24
23
22
21
OUTB
VREF
V+ D
V+
A
20
19
18
17
32
IN4B
16
CLOCK LATCH
31
NJU7391
A
– 3 –
Q ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER SYMBOL RATING UNIT
Power Supply Voltage V+ 10 (Note1) V
Power Dissipation PD 800 (Note2) mW
Maximum Input Voltage VIMAX 0 ~ V+ (Note3) V
Operating Temperature Range Topr -40 ~ +85 °C
Storage Temperature Range Tstg -40 ~ +125 °C
(Note1) Pay attention to supply voltage not to exceed the absolute maximum power supply voltage by spike noise etc.
Because the difference between the absolute maximum power supply voltage and the operating voltage is small.
(Note2) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
(Note3) Don’t apply the input voltage that exceeds supply voltage.
QELECTRICAL CHARACTERISTICS(Ta=25°C,V+=9V,RL=47kΩ,Vin=100mVrms/1kHz,VOL=0dB,TONE=OFF,SUR=OFF)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Operating Voltage V
+ 4.7 9.0 9.7 V
Supply Current I
DD No signal - 10 18 mA
Reference Voltage V
REF No signal 3.5 4.0 4.5 V
Input impedance RIN - 60 - kΩ
Output impedance ROUT - 200 - Ω
Maximum Input Voltage VIM VOL=0dB,THD=1% - 3.0 - Vrms
Maximum Output Voltage VOM OUTPUT
VOL=0dB,THD=1% - 3.0 - Vrms
Maximum Gain GVMAX VOL=0dB -1.0 0 1.0 dB
Minimum Gain GVMIN V
IN=1Vrms, VOLA/B=MUTE - -100 -90 dB
Maximum Input Gain GVINMAX GVIN=”111”(+14dB) - 14 - dB
Channel Balance GCB VOL=0dB -1 0 1 dB
Cross Talk CT
VIN=1Vrms
Selected Input : 0Ω
Unselected Input : Signal
- - -80 dB
Channel Separation CS VIN=1Vrms - - -80 dB
Total Harmonic Distortion 1 THD+N1 VO=1Vrms, BW=400Hz-30kHz - 0.002 0.01 %
Total Harmonic Distortion 2 THD+N2 VO=2Vrms, BW=400Hz-30kHz - 0.01 - %
Total Harmonic Distortion 3 THD+N3
GVIN=”011” (GVIN=+6dB)
Vo=2Vrms, f=10kHz
BW=400Hz ~ 80kHz
- 0.01 - %
Output Noise VNO Rg=0Ω, A-weight - -110 -97 dBV
XTone Control Characteristics
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
High Frequency Boost HFBST BCT=”1”,TREB=”111”, f=10kHz 11.5 14.0 16.5 dB
High Frequency Cut HFCUT BCT=”0”,TREB=”111”, f=10kHz -16.5 -14.0 -11.5 dB
Low Frequency Boost LFBST BCB=”1”,BASS=”111”, f=100Hz 11.5 14.0 16.5 dB
Low Frequency Cut LFCUT BCB=”0”,BASS=”111”, f=100Hz -16.5 -14.0 -11.5 dB
NJU7391A
– 4 –
XSurround (eala) Characteristics
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Surround 1 SUR1 SUR=”01”, f=100Hz, Ain-Aout 1.6 3.6 5.6 dB
Surround 2 SUR2 SUR=”10”, f=100Hz, Ain-Aout 4.3 6.3 8.3 dB
Surround 3 SUR3 SUR=”11”, f=100Hz, Ain-Aout 6.6 8.6 10.6 dB
Surround 4 SUR4 SUR=”11”, f=100Hz, Ain-Bout 2.8 4.8 6.8 dB
XLogic Control Characteristics
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
High Level Input Voltage VIH DATA,CLOCK,LATCH 2.6 - 5.5 V
Low Level Input Voltage VIL DATA,CLOCK,LATCH 0 - 1.0 V
NJU7391
A
– 5 –
CONTROL DATA FORMAT
(7) MSB First
SYMBOL PARAMETER MIN TYP MAX UNIT
t1 CLOCK Clock Width 4 - -
µsec
t2 CLOCK Pulse Width (High) 2 - -
µsec
t3 CLOCK Pulse Width (Low) 2 - -
µsec
t4 LATCH Rise Hold Time 4 - -
µsec
t5 DATA Setup Time 1.6 - - µsec
t6 DATA Hold Time 1.6 - - µsec
t7 CLOCK Setup Time 1.6 - - µsec
t8 LATCH High Pulse Width 1.6 - - µsec
CONTROL DAT A
NJU7391A control data is constructed with 16bits.
MSB LSB
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Data Select Address Chip Address
MSB
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Don’t
Care VOLA 0 0 0 0 0 1 0 1
Don’t
Care VOLB 0 0 0 1 0 1 0 1
BCB BAS BCT TRE 0 0 1 0 0 1 0 1
SUR SEL GVIN 0 0 1 1 0 1 0 1
LSB
INITIAL CONDITION
MSB LSB
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1
0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1
0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1
LATCH
DAT
A
CLOCK
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
MSB LSB
t7 t1
t2 t3
t4 t8
t5 t6
NJU7391A
– 6 –
DEFINITION OF RESISTOR
XVolume A, Volume B 0dB to -95dB in 1dB/step. *Each volume is controlled independently.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Don’t
Care VOLA 0 0 0 0 0 1 0 1
Don’t
Care VOLB 0 0 0 1 0 1 0 1
< Volume Control Data >
Data Setting
D14 D13 D12 D11 D10 D9 D8
1 1 1 1 1 1 1 0dB (7)
1 1 1 1 1 1 0 -1dB
1 1 1 1 1 0 1 -2dB
1 1 1 1 1 0 0 -3dB
1 1 1 1 0 1 1 -4dB
1 1 1 1 0 1 0 -5dB
1 1 1 1 0 0 1 -6dB
1 1 1 1 0 0 0 -7dB
1 1 1 0 1 1 1 -8dB
1 1 1 0 1 1 0 -9dB
1 1 1 0 1 0 1 -10dB
1 1 1 0 1 0 0 -11dB
1 1 1 0 0 1 1 -12dB
1 1 1 0 0 1 0 -13dB
1 1 1 0 0 0 1 -14dB
1 1 1 0 0 0 0 -15dB
1 1 0 1 1 1 1 -16dB
• • • • • •
0 1 0 1 1 1 1 -80dB
0 1 0 0 1 1 1 -88dB
0 1 0 0 0 0 0 -95dB
0 0 Don’t Care MUTE(7)
(7)Initial Setting
NJU7391
A
– 7 –
_Tone Control
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BCB BAS BCT TRE 0 0 1 0 0 1 0 1
●BCB : Boost Cut select for Bass control
“0” : Cut
“1” : Boost
●BAS : BASS Level Setting
Cut Level : -14 to 0dB (2dB/step)
Boost Level : 0 to +14dB (2dB/step)
●BCT : Boost Cut select for Treble control
“0” : Cut
“1” : Boost
●TRE : BASS Level Setting
Cut Level : -14 to 0dB (2dB/step)
Boost Level : 0 to +14dB (2dB/step)
< Tone Control Data >
•BAS: TONE-BASS Level
Data
D15 D14 D13 D12
BCB BAS
Setting
1 1 1 1 +14dB
1 1 1 0 +12dB
1 1 0 1 +10dB
1 1 0 0 +8dB
1 0 1 1 +6dB
1 0 1 0 +4dB
1 0 0 1 +2dB
1 0 0 0 0dB
0 0 0 0 0dB (7)
0 0 0 1 -2dB
0 0 1 0 -4dB
0 0 1 1 -6dB
0 1 0 0 -8dB
0 1 0 1 -10dB
0 1 1 0 -12dB
0 1 1 1 -14dB
(7)Initial Setting
•TRE: TONE-TREBLE Level
Data
D11 D10 D9 D8
BCT TRE
Setting
1 1 1 1 +14dB
1 1 1 0 +12dB
1 1 0 1 +10dB
1 1 0 0 +8dB
1 0 1 1 +6dB
1 0 1 0 +4dB
1 0 0 1 +2dB
1 0 0 0 0dB
0 0 0 0 0dB (7)
0 0 0 1 -2dB
0 0 1 0 -4dB
0 0 1 1 -6dB
0 1 0 0 -8dB
0 1 0 1 -10dB
0 1 1 0 -12dB
0 1 1 1 -14dB
(7)Initial Setting
NJU7391A
– 8 –
XSurround(eala), Input Selector, Input Gain
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
SUR SEL GVIN 0 0 1 1 0 1 0 1
< Surround(eala) Data >
Data
D15 D14 Setting
0 0 BYPASS (7)
0 1 Surround1(MIN)
1 0 Surround2(MID)
1 1 Surround3(MAX)
(7)initial setting
< Input Selector Data >
Data
D13 D12 D11 Setting
0 0 0 Input 1 (7)
0 0 1 Input 2
0 1 0 Input 3
0 1 1 Input 4
1 0 0 Input 5
(7)initial setting
< Input Gain Data >
Data
D10 D9 D8 Setting
0 0 0 BYPASS (7)
0 0 1 +2dB
0 1 0 +4dB
0 1 1 +6dB
1 0 0 +8dB
1 0 1 +10dB
1 1 0 +12dB
1 1 1 +14dB
(7)initial setting
NJU7391
A
– 9 –
TERMINAL DESCRIPTION
No. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE
1
2
3
4
5
28
29
30
31
32
IN1A
IN2A
IN3A
IN4A
IN5A
IN5B
IN4B
IN3B
IN2B
IN1B
Ach input1 terminal
Ach input2 terminal
Ach input3 terminal
Ach input4 terminal
Ach input5 terminal
Bch input5 terminal
Bch input4 terminal
Bch input3 terminal
Bch input2 terminal
Bch input1 terminal
200
60k
V+ ∗ (4/9)
6
9
12
21
24
27
SELOUTA
TONE-BA
OUTA
OUTB
TONE-BB
SELOUTB
Ach selector output terminal
Ach Bass(tone) filter terminal
Ach output terminal
Bch output terminal
Bch Bass(tone) filter terminal
Bch selector output terminal
200
V+ ∗ (4/9)
7
26
VOL1A
VOL1B
Ach Volume input terminal
Bch Volume input terminal
200
40k :VOL= 0 ~ -7dB
80k :VOL= -8dB ~
V+ ∗ (4/9)
8
10
23
25
TONE-HA
TONE-DBA
TONE-DBB
TONE-HB
Ach Treble(tone) filter terminal
Ach Bass(tone) filter terminal
Bch Bass(tone) filter terminal
Bch Treble(tone) filter terminal
200
V+ ∗ (4/9)
11
22
SRA
SRB
Ach Surround filter terminal
Bch Surround filter terminal
200
V+ ∗ (4/9)
NJU7391A
– 10 –
TERMINAL DESCRIPTION
No. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE
15
16
17
DATA
CLOCK
LATCH
3-Wired DATA terminal
3-Wired CLOCK terminal
3-Wired LATCH terminal
4k
20 VREF Reference voltage terminal
160k
200k
200
V+ ∗ (4/9)
NJU7391
A
– 11 –
APPLICATION CIRCUI T
32
31
30
27
26
25
24
23
29
28
20
19
18
17
22
21
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
bias
+
+
+
+
+
+
+
+
+
+
INPUT(Ach)
INPUT(Bch)
TRE
VOL
BASS
TRE
BASS
VOL
+ + OUTPUT(Bch)
OUTPUT(Ach)
3-wire
eala
+
V+ digi
V+ ana
1uF
1uF
6.8nF
47nF
220nF
5.6k
4.7nF
4.7uF
1uF
1uF
6.8nF
47nF
220nF
5.6k
4.7nF
4.7uF
4.7uF
DA TA
CLOCK
LATCH
+
V+
GND 100uF
GND ana
GND digi
100nF
Please connect the wiring for the de-coupling capacitor (especially C13) between V+ and GND as
short as possible to reduce the digital bus noise.
NJU7391A
– 12 –
APPLICATION NOTE
(1) TONE Control Application note
(a) Bass Control
(a-1)Boost (a-2)Cut
(Hz)
(dB)
Table.a-1 : Internal resistance in each Gain.
Gain R1 R2
±14dB 36.1kΩ 2.9kΩ
±12dB 34.4kΩ 4.6kΩ
±10dB 31.7kΩ 7.3kΩ
±8dB 28.1kΩ 10.9kΩ
±6dB 23.9kΩ 15.1kΩ
±4dB 17.3kΩ 21.7kΩ
±2dB 10.1kΩ 28.9kΩ
±0dB 0Ω 39kΩ
OUT
R1 R2
IN
C1 C2
R3
TO NE- DB ( PIN: 10 , 23 ) TO NE- B( PIN: 9 ,24 )TONE-DB( PIN:10,23) TONE-B(PIN:9,24)
IN OUT
R2 R1
C2 C1
R3
213)21(2
1
0CCRRR
f∗∗∗+
=
π
()
()
21322 132321
20
0CCRCR CRCRRR
LogG +∗+∗
∗
+∗++
±=
()
21322
213)21(
CCRCR
CCRRR
Q+∗+∗
∗∗∗+
=
NJU7391
A
– 13 –
Table.a-1 (fc : variable)
f0 =variable, Gain=14dB, Q≈0.7
f0 C1 (F) C2 (F) R3
(Ω)
50 100n 470n 5.6k
100 47n 220n 5.6k
200 22n 100n 5.6k
Table.a-2 (Q : variable)
f0≈100Hz, Gain=14dB, Q =variable
Q C1 (F) C2 (F) R3
(Ω)
0.5 33n 330n 6.2k
0.7 47n 220n 5.6k
1 100n 150n 3.9k
Table.a-3 (Gain : variable)
f0≈100Hz, Gain=14dB setting
Gain(dB) C1 (F) C2 (F) R3
(Ω)
10 100n 100n 6.8k
14 47n 220n 5.6k
17.5 68n 330n 2.2k
Gain vs Frequency (TONE BASS )
V+=9V, Vin=0.1Vrms, TONE Gain=+14dB, Ta=25oC
-5
0
5
10
15
20
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
C1=100nF
C2=470nF
R3=5.6kΩ
C1=47nF
C2=220nF
R3=5.6kΩ
C1=22nF
C2=100nF
R3=5.6kΩ
Gain vs Frequency (TONE BASS )
V+=9V, Vin=0.1Vrms, TONE Gain=+14dB, Ta=25oC
-5
0
5
10
15
20
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
C1=100nF
C2=150nF
R3=3.9kΩ
C1=47nF
C2=220nF
R3=5.6kΩ
C1=33nF
C2=330nF
R1=6.2kΩ
Gain vs Frequency (TONE BASS )
V+=9V, Vin=0.1Vrms, TONE Gain=+14dB, Ta=25oC
-5
0
5
10
15
20
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
C1=100nF
C2=100nF
R3=6.8kΩ
C1=47nF
C2=220nF
R3=5.6kΩ
C1=68nF
C2=330nF
R3=2.2kΩ
NJU7391A
– 14 –
(b) Treble Control
(b-1) Boost (b-2)Cut
(dB)
Table.b-1 : Internal resistance in each Gain.
Gain R1(Ω) R2(Ω)
±14dB 16.2kΩ 3.3kΩ
±12dB 15.2kΩ 4.3kΩ
±10dB 14.2kΩ 5.3kΩ
±8dB 12.8kΩ 6.7kΩ
±6dB 10.9kΩ 8.6kΩ
±4dB 8.2kΩ 11.3kΩ
±2dB 4.7kΩ 14.8kΩ
±0dB 0Ω 19.5kΩ
Table.b-2 (fc : variable)
Gain=14dB, fc =variable
fc(Hz) C1 (F)
1.8k 22n
4k 10n
8.5k 4.7n
18k 2.2n
TONE-H(PIN:8,25)
C1
IN OUT
R2 R1
IN OUT
TONE-H(PIN:8,25)
R1 R2
C1
()()
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡
×××+
×+±= 2
212/11
1
2
1
120 RCf
R
R
LogGV
π
Gain vs Frequency (TONE TREBLE )
V+=9V, Vin=0.1Vrms, TONE Gain=+14dB, Ta=25oC
-5
0
5
10
15
20
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
C1=3.3nF
C1=4.7nF
C1=6.8nF
C1=10nF
NJU7391
A
– 15 –
Supply Current vs Supply Voltage
Ta=25oC
0
5
10
15
051015
Supply Voltage (V)
Supply Current (mA)
Gain vs Volume Control
V+=9V, Vin(VolIN)=1Vrms,f=1kHz,Rg=0Ω
-100
-80
-60
-40
-20
0
-100 -80 -60 -40 -20 0
Volume Control (dB)
Gain (dB)
Gain vs Frequency (Volume)
V+=9V, VOL=0dB to MUTE -10dBstep, Vin=1Vrms, Ta=25
o
C
-120
-100
-80
-60
-40
-20
0
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
Supply Current vs Temparature
V+=9V
5
10
15
-50 0 50 100
Temparature (oC)
Supply Current (mA)
MUTE Level vs Frequency (MUTE)
V+=9 V, Vi n(Vo l IN )=1 Vrm s , Vo l =MUTE , Rg =0 Ω, Ta=25
o
C
0
20
40
60
80
100
120
10 100 1000 10000 100000
Frequency (Hz)
MUTE Level (dB
)
Channel Separation vs Frequency
V+=9V, Vin=1Vrms,Vo=OUTPUT, Rg=0Ω, Vol=0dB, Ta=25
o
C
0
20
40
60
80
100
120
10 100 1000 10000 100000
Frequency (Hz)
Channel Separation (dB)
MUT
E
85,25,-40
o
C
Ain-Bout, Bin-Aout
TYPICAL CHARACTERISTICS
NJU7391A
– 16 –
CrossTalk vs Frequency
V+=9V, Vin(SEL2-5)=1Vrms,Vin(SEL1)=GND, Vo=OUTPUT,
Rg=0Ω, Vol=0dB, Ta=25
o
C
0
20
40
60
80
100
120
10 100 1000 10000 100000
Frequency (Hz)
Cross Talk (dB)
THD+N vs Output Voltage
(Volume Sw eep)
V+=9 V, Vi n(Ach ), f=1 kHz, Vo (Ach)OU TPUT, Rg = 0 Ω,
BW=20Hz-20kHz, Ta=25
o
C
0.0001
0.001
0.01
0.1
1
10
0.01 0.1 1 10
Output Voltage (Vrms)
THD + N (%)
THD+N vs OutputVoltage
(Frequency Sw eep)
V+=9V,Vin(Ach),Vo(Ach)OUTPUT,Rg=0Ω
BW=20Hz-80kHz,Ta=25
o
C
0.0001
0.001
0.01
0.1
1
10
0.01 0.1 1 10
Output Voltage (Vrms)
THD + N (%)
THD+N vs Output Voltage
V+=9 V, Vi n(Ach ), f=1 kHz, Vo (Ach)OU TPUT, Rg = 0 Ω,
BW=20Hz-20kHz
0.0001
0.001
0.01
0.1
1
10
0.01 0.1 1 10
Output Voltage (Vrms)
THD + N (%)
0dB
-10dB
-20dB
-30dB
100,1kHz
20kHz
85
o
C
-40
o
C
25
o
C
Output Noise vs Temparature
V+=9V, Vin=GND, Rg=0Ω, A-weight
-120
-115
-110
-105
-100
-50 0 50 100
Temparature (
o
C)
Output Noise (dBV)
TYPICAL CHARACTERISTICS
NJU7391
A
– 17 –
Gain vs Frequency (TONE BASS)
V+=9V, Vin=0.1Vrms, BASS Gain=2dB steps, Ta=25
o
C
-20
-15
-10
-5
0
5
10
15
20
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
Gain vs Frequency (eala)
V+=9V, Vin(Ach)=0.1Vrms, Vout=Bch, Ta=25
o
C
-15
-10
-5
0
5
10
15
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
Gain vs Frequency (TONE)
V+=9V, Vin=0.1Vrms, TONE Gain=+14dB, -14dB
-20
-15
-10
-5
0
5
10
15
20
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
Gain vs Frequency (eala)
V+=9V, Vin(Ach)=0.1Vrms, Vout=Ach, Ta=25
o
C
-15
-10
-5
0
5
10
15
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
Gain vs Frequency (eala)
V+=9V, Vin(Ach)=0.1Vrms,Surround level=Surround3
-15
-10
-5
0
5
10
15
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
Gain vs Frequency (TONE TREB)
V+=9V, Vin=0.1Vrms, TREB Gain=2dB steps, Ta=25
o
C
-20
-15
-10
-5
0
5
10
15
20
10 100 1000 10000 100000
Frequency (Hz)
Gain (dB)
-40
o
C
-40
o
C
25
o
C
85
o
C
85
o
C
25
o
CSurround3
Surround1
Surround2
Surround1
Surround2
Surround3 85,25
o
C
85,25
o
C
-40
o
C
Ain-Aout
Ain-Bout
TYPICAL CHARACTERISTICS
NJU7391A
– 18 –
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
NJR:
NJU7391V-TE2