MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 General Description The MAX4230-MAX4234 single/dual/quad, high-output drive CMOS op amps feature 200mA of peak output current, rail-to-rail input, and output capability from a single 2.7V to 5.5V supply. These amplifiers exhibit a high slew rate of 10V/s and a gain-bandwidth product (GBWP) of 10MHz. The MAX4230-MAX4234 can drive typical headset levels (32), as well as bias an RF power amplifier (PA) in wireless handset applications. The MAX4230 comes in a tiny 5-pin SC70 package and the MAX4231, single with shutdown, is offered in a 6-pin SC70 package and in 1.5mm x 1.0mm UCSP and thin DFN packages. The dual op-amp MAX4233 is offered in the space-saving 10-bump chip-scale package (UCSPTM), providing the smallest footprint area for a dual op amp with shutdown. These op amps are designed to be part of the PA control circuitry, biasing RF PAs in wireless headsets. The MAX4231/ MAX4233 offer a SHDN feature that drives the output low. This ensures that the RF PA is fully disabled when needed, preventing unconverted signals to the RF antenna. Applications RF PA Biasing Controls in Handset Applications Portable/Battery-Powered Audio Applications Portable Headphone Speaker Drivers (32) Audio Hands-Free Car Phones (Kits) Tablet/Notebook Computers Digital-to-Analog Converter Buffers Transformer/Line Drivers Motor Drivers Benefits and Features Optimized for Headsets and High-Current Outputs * 200mA Output Drive Capability * 100dB Voltage Gain (RL = 100k) * 85dB Power-Supply Rejection Ratio * No Phase Reversal for Overdriven Inputs * Unity-Gain Stable for Capacitive Loads to 780pF Suitable for High-Bandwidth Applications * 10MHz Gain-Bandwidth Product * High Slew Rate: 10V/s Extends the Battery Life of Portable Applications * 1.1mA Supply Current per Amplifier Low-Power Shutdown Mode Reduces Supply Current to < 1A Small Package Options * Tiny, 2.1mm x 2.0mm Space-Saving SC70 Package Ordering Information PINPACKAGE 5 SC70 TOP MARK ACS MAX4230AXK/V+T -40C to +125C 5 SC70 +AUU MAX4230AUK+T -40C to +125C 5 SOT23 ABZZ MAX4231AXT+T -40C to +125C 6 SC70 MAX4231AUT+T -40C to +125C 6 SOT23 ABNF MAX4231ART+T -40C to +125C 6 UCSP AAM -40C to +125C 6 Thin DFN (Ultra-Thin LGA) +AH PART MAX4230AXK+T MAX4231AYT+T TEMP RANGE -40C to +125C ABA +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Ordering Information continued at end of data sheet. Typical Operating Circuit ANTENNA 2.7V TO 5.5V Selector Guide appears at end of data sheet. Pin/Bump Configurations appear at end of data sheet. ILOAD = 30mA RISO SHDN C R 19-2164; Rev 19; 1/15 PA CLOAD Visit www.maximintegrated.com/products/patents for product patent marking information. UCSP is a trademark of Maxim Integrated Products, Inc. MAX4231 DAC RF MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Absolute Maximum Ratings Supply Voltage (VDD to VSS) ................................................6V All Other Pins ...................................(VSS - 0.3V) to (VDD + 0.3V) Output Short-Circuit Duration to VDD or VSS (Note 1) ...............10s Continuous Power Dissipation (Multilayer, TA = +70C) 5-Pin SC70 (derate 3.1mW/C above +70C) ..............247mW 5-Pin SOT23 (derate 3.9mW/C above +70C)............313mW 6-Pin SC70 (derate 3.1mW/C above +70C) ..............245mW 6-Pin SOT23 (derate 13.4mW/C above +70C)........1072mW 6-Pin Thin DFN (derate 2.1mW/C above +70C)...170.2mW 6-Bump UCSP (derate 3.9mW/C above +70C) .....308.3mW 8-Pin SOT23 (derate 5.1mW/C above +70C).........408.2mW 8-Pin MAX(R) (derate 4.8mW/C above +70C) .......387.8mW 10-Pin MAX (derate 8.8mW/C above +70C) .......707.3mW 10-Bump UCSP (derate 5.6mW/C above +70C) .....448.7mW 14-Pin SO (derate 11.9mW/C above +70C) ..........952.4mW 14-Pin TSSOP (derate 10mW/C above +70C) ......796.8mW Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (excluding 6 and 10 UCSP, soldering, 10s) ................+300C Soldering Temperature (reflow) .......................................+260C MAX is a registered trademark of Maxim Integrated Products, Inc. Note 1: Package power dissipation should also be observed. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC Electrical Characteristics (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = connected to (VDD/2), VSHDN = VDD, TA = +25C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL Operating Supply Voltage Range VDD Input Offset Voltage VOS Input Bias Current (Note 4) CONDITIONS Inferred from PSRR test MIN TYP 2.7 0.85 IB VCM = VSS to VDD Input Offset Current IOS VCM = VSS to VDD Input Resistance RIN Common-Mode Input Voltage Range VCM Inferred from CMRR test MAX UNITS 5.5 V 6 mV 1 pA 50 pA 1000 M VSS VDD V Common-Mode Rejection Ratio CMRR VSS < VCM < VDD 52 70 dB Power-Supply Rejection Ratio PSRR VDD = 2.7V to 5.5V 73 85 dB Shutdown Output Impedance ROUT VSHDN = 0V (Note 3) 10 VSHDN = 0V, RL = 200 (Note 3) 68 mV Output Voltage in Shutdown Large-Signal Voltage Gain VOUT(SHDN) AVOL VSS + 0.20V < VOUT < VDD 0.20V RL = 32 Output Voltage Swing VOUT RL = 200 RL = 2k www.maximintegrated.com RL = 100k 100 RL = 2k 85 RL = 200 74 98 dB 80 VDD - VOH 400 500 VOL - VSS 360 500 VDD - VOH 80 120 VOL - VSS 70 120 VDD - VOH 8 14 VOL - VSS 7 14 mV Maxim Integrated 2 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 DC Electrical Characteristics (continued) (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = connected to (VDD/2), VSHDN = VDD, TA = +25C, unless otherwise noted.) (Note 2) PARAMETER Output Source/Sink Current SYMBOL IOUT CONDITIONS IDD Shutdown Supply Current (per Amplifier) (Note 3) IDD(SHDN) SHDN Logic Threshold (Note 3) VDD = 5V, VIN = 100mV 200 IL = 10mA VDD = 2.7V IL = 30mA VDD = 5V MAX VDD - VOH 128 200 VOL - VSS 112 175 VDD - VOH 240 320 VOL - VSS 224 300 VDD = 5.5V, VCM = VDD/2 1.2 2.3 1.1 2.0 VDD = 5.5V 0.5 1 VDD = 2.7V 0.1 1 VSHDN = 0V, RL = Shutdown mode VIH Normal mode 0.8 VDD x 0.57 VSS < VSHDN < VDD (Note 3) UNITS mA VDD = 2.7V, VCM = VDD/2 VIL SHDN Input Bias Current TYP 70 Output Voltage Quiescent Supply Current (per Amplifier) MIN VDD = 2.7V, VIN = 100mV 50 mV mA A V pA DC Electrical Characteristics (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = connected to (VDD/2), VSHDN = VDD, TA = -40 to +125C, unless other wise noted.) (Note 2) PARAMETER SYMBOL Operating Supply Voltage Range VDD Input Offset Voltage VOS Offset-Voltage Tempco Input Bias Current (Note 4) Common-Mode Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Inferred from PSRR test IB VCM 5.5 V 8 mV V/C 17 TA = -40C to +125C 550 Inferred from CMRR test VSS PSRR VDD = 2.7V to 5.5V 70 VOUT UNITS TA = -40C to +85C 46 AVOL MAX 3 VSS < VCM < VDD Large-Signal Voltage Gain TYP 2.7 CMRR VOUT(SHDN) VDD V dB VSS + 0.20V < VDD - 0.20V RL = 2k 76 RL = 200 67 RL = 32 TA = +85C VDD - VOH 650 VOL - VSS 650 VDD - VOH 150 VOL - VSS 150 VDD - VOH 20 VOL - VSS 20 RL = 200 pA dB 150 VSHDN = 0V, RL = 200 (Note 3) RL = 2k www.maximintegrated.com MIN VOS/T Output Voltage in Shutdown Output Voltage Swing CONDITIONS mV dB mV Maxim Integrated 3 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 DC Electrical Characteristics (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = connected to (VDD/2), VSHDN = VDD, TA = -40 to +125C, unless other wise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS VDD = 2.7V IL = 10mA Output Voltage IL = 30mA TA = -40C to +85 Quiescent Supply Current (per Amplifier) IDD Shutdown Supply Current (per Amplifier) (Note 3) IDD(SHDN) SHDN Logic Threshold (Note 3) VDD = 5V MIN TYP MAX VDD - VOH 250 VOL - VSS 230 VDD - VOH 400 VOL - VSS 370 VDD = 5.5V, VCM = VDD/2 2.8 VDD = 2.7V, VCM = VDD/2 2.5 VSHDN < 0V, RL = VIL Shutdown mode VIH Normal mode VDD = 5.5V 2.0 VDD = 2.7V 2.0 0.8 VDD x 0.61 UNITS mV mA A V AC Electrical Characteristics (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = (VDD/2), RL = connected to (VDD/2), VSHDN = VDD, TA = +125C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Gain-Bandwidth Product GBWP VCM = VDD/2 10 MHz Full-Power Bandwidth FPBW VOUT = 2VP-P, VDD = 5V 0.8 MHz Slew Rate SR 10 V/s Phase Margin PM 70 Degrees Gain Margin GM 15 dB 0.0005 % 8 pF Total Harmonic Distortion Plus Noise THD+N Input Capacitance CIN Voltage-Noise Density en f = 10kHz, VOUT = 2VP-P, AVCL = 1V/V f = 1kHz 15 f = 10kHz 12 Channel-to-Channel Isolation f = 1kHz, RL = 100k 125 dB Capacitive-Load Stability AVCL = 1V/V, no sustained oscillations 780 pF Shutdown Time Enable Time from Shutdown Power-Up Time nV/Hz tSHDN (Note 3) 1 s tENABLE (Note 3) 6 s 5 s tON Note 2: All units 100% tested at +25C. All temperature limits are guaranteed by design. Note 3: SHDN logic parameters are for the MAX4231/MAX4233 only. Note 4: Guaranteed by design. www.maximintegrated.com Maxim Integrated 4 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Typical Operating Characteristics (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RL = , connected to VDD/2, VSHDN = VDD, TA = +25C, unless otherwise noted.) GAIN AND PHASE vs. FREQUENCY (CL = 250pF) 120 60 90 50 60 40 30 30 0 20 -30 10 -60 0 -90 -10 -120 AV = 1000V/V -30 0.01k 0.1k 1k -150 10k 100k 1M 60 40 30 30 0 20 -30 10 -60 0 -90 -10 -120 AV = 1000V/V CL = 250pF -30 0.01k 0.1k FREQUENCY (Hz) 1k 1M -180 10M 100M -30 -40 -50 -60 -70 100 OUTPUT IMPEDANCE () MAX4230 toc03 -20 10 1 0.1 -80 AV = 1V/V AV = 1V/V -90 -100 0.01k 0.1k 1k 10k 100k 1M 0.01 10M 1k 10k 1.2 1.0 0.8 0.6 0.4 MAX4230 toc06 100 SUPPLY CURRENT (nA) 1.4 90 80 70 60 0.2 -40 -20 0 20 40 60 80 TEMPERATURE (C) www.maximintegrated.com 10M 110 MAX4230 toc05 1.6 1M SUPPLY CURRENT vs. TEMPERATURE (SHDN = LOW) SUPPLY CURRENT vs. TEMPERATURE 1.8 100k FREQUENCY (Hz) FREQUENCY (Hz) SUPPLY CURRENT (mA) 100k OUTPUT IMPEDANCE vs. FREQUENCY 0 0 10k 1000 -10 2.0 -150 FREQUENCY (Hz) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY PSRR (dB) 90 50 -20 -180 10M 100M 120 60 MAX4230 toc04 -20 MAX4230 toc02 70 GAIN (dB) GAIN (dB) 70 PHASE () MAX4230 toc01 PHASE () GAIN AND PHASE vs. FREQUENCY 100 120 50 SHDN = VSS -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) Maxim Integrated 5 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Typical Operating Characteristics (continued) (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RL = , connected to VDD/2, VSHDN = VDD, TA = +25C, unless otherwise noted.) 1.8 1.6 MAX4230 toc08 2 MAX4230 toc07 2.0 VDD = 2.7V 1.0 0.8 0.6 80 VDD - VOUT (mV) 1.2 VDD = 5.0V 0 -1 0.4 VDD = 5.0V RL = 200 100 1 1.4 VOS (mV) SUPPLY CURRENT (mA) OUTPUT SWING HIGH vs. TEMPERATURE INPUT OFFSET VOLTAGE vs. TEMPERATURE MAX4230/34 toc09 SUPPLY CURRENT PER AMPLIFIER vs. SUPPLY VOLTAGE VDD = 2.7V RL = 200 60 40 20 0.2 2.5 3.0 3.5 4.0 4.5 5.0 80 0 100 120 0 20 40 60 -40 -20 0 20 40 60 100 120 80 0 -0.5 -1.0 MAX4230/3 toc12 1.2 SUPPLY CURRENT (mA) 0.5 1.0 0.8 0.6 0.4 -1.5 -2.0 80 100 120 MAX4230/3 toc11 MAX4230/3 toc10 VDD = 2.7V RL = 200 1.0 VDD = 2.7V 0 0.5 1.5 1.0 2.0 0.2 2.5 0 0.5 1.5 1.0 2.0 2.5 COMMON-MODE VOLTAGE (V) COMMON-MODE VOLTAGE (V) SUPPLY CURRENT PER AMPLIFIER vs. COMMON-MODE VOLTAGE TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs. PEAK-TO-PEAK OUTPUT VOLTAGE 0.45 MAX4230/34 toc13 1.4 1.2 VOUT = 2VP-P 500kHz LOWPASS FILTER 0.40 10 0.35 1 0.30 THD+N (%) 1.0 0.8 0.25 0.20 f = 10kHz VDD = 5V RL = 25 RL = 2k RL = 100k RL = 250 MAX4230/34 toc15 TEMPERATURE (C) THD+N (%) VOUT - VSS (mV) 60 SUPPLY CURRENT PER AMPLIFIER vs. COMMON-MODE VOLTAGE 20 SUPPLY CURRENT (mA) 40 INPUT OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE 40 0.1 0.15 0.6 VDD = 5.0V 0.4 0.2 20 OUTPUT SWING LOW vs. TEMPERATURE 60 -40 -20 0 TEMPERATURE (C) 80 0 -20 TEMPERATURE (C) VDD = 5.0V RL = 200 100 -40 SUPPLY VOLTAGE (V) 140 120 -2 5.5 MAX4230/34 toc14 2.0 INPUT OFFSET VOLTAGE (mV) 0 RL = 32 0.10 0.05 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 COMMON-MODE VOLTAGE (V) www.maximintegrated.com 0 0.001 RL = 10k 10 100 1k FREQUENCY (Hz) 10k 100k 0.0001 4.0 4.2 4.4 4.6 4.8 5.0 PEAK-TO-PEAK OUTPUT VOLTAGE (V) Maxim Integrated 6 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Typical Operating Characteristics (continued) (VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RL = , connected to VDD/2, VSHDN = VDD, TA = +25C, unless otherwise noted.) SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX4230/34 toc17 MAX4230/34 toc16 MAX4230/34 toc18 IN IN IN 50mV/div 50mV/div 1V/div OUT OUT OUT 400ns/div LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) OUTPUT CURRENT vs. OUTPUT VOLTAGE (SOURCING, VDD = 2.7V) OUTPUT CURRENT vs. OUTPUT VOLTAGE (SINKING, VDD = 2.7V) OUTPUT CURRENT (mA) 70 1V/div OUT 60 50 40 30 20 -50 -100 -150 0 0.5 1.0 1.5 2.0 OUTPUT VOLTAGE (V) www.maximintegrated.com 2.5 3.0 -30 -40 -50 -60 -80 0 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT VOLTAGE (V) OUTPUT CURRENT vs. OUTPUT VOLTAGE (SINKING, VDD = 5.0V) INPUT VOLTAGE NOISE vs. FREQUENCY VDIFF = 100mV -50 -100 -150 -250 -20 OUTPUT VOLTAGE (V) -200 -200 -250 0 OUTPUT CURRENT (mA) VDIFF = 100mV MAX4230/34 toc23 OUTPUT CURRENT (mA) 0 OUTPUT CURRENT vs. OUTPUT VOLTAGE (SINKING, VDD = 5.0V) 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 MAX4230/34 toc23 0 VDIFF = 100mV -10 -70 10 400ns/div 0 0 0.5 1.0 1.5 2.0 OUTPUT VOLTAGE (V) 2.5 3.0 200 100 10 100 1.4 1.6 MAX4230/34 toc24 IN VDIFF = 100mV OUTPUT CURRENT (mA) 80 INPUT VOLTAGE NOISE (nV/Hz) MAX4230/34 toc19 MAX4230/34 toc21 400ns/div MAX4230/34 toc20 400ns/div 1k 10k 100k FREQUENCY (Hz) Maxim Integrated 7 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Pin Description PIN BUMP MAX4231 MAX4230 MAX4232 SOT23/ MAX4233 MAX4234 MAX4231 SOT23/ SOT23/ SC70/Thin TSSOP/SO MAX UCSP SC70 MAX DFN MAX4233 UCSP NAME FUNCTION 1 1 -- -- -- B1 -- IN+ Noninverting Input 2 2 4 4 11 A1 B4 VSS Negative Supply Input. Connect to ground for singlesupply operation. 3 3 -- -- -- B2 -- IN- 4 4 -- -- -- A2 -- OUT Amplifier Output 5 6 8 10 4 A3 B1 VDD Positive Supply Input -- 5 -- 5, 6 -- B3 C4, A4 SHDN, SHDN1, SHDN2 -- -- 3 3 3 -- C3 IN1+ Noninverting Input to Amplifier 1 -- -- 2 2 2 -- C2 IN1- Inverting Input to Amplifier 1 -- -- 1 1 1 -- C1 OUT1 Amplifier 1 Output -- -- 5 7 5 -- A3 IN2+ Noninverting Input to Amplifier 2 -- -- 6 8 6 -- A2 IN2- -- -- 7 9 7 -- A1 OUT2 -- -- -- -- 10, 12 -- -- -- -- -- -- 9, 13 -- -- -- -- -- -- 8, 14 -- -- Detailed Description Rail-to-Rail Input Stage The MAX4230-MAX4234 CMOS operational amplifiers have parallel-connected n- and p-channel differential input stages that combine to accept a common-mode range extending to both supply rails. The n-channel stage is active for common-mode input voltages typically greater than (VSS + 1.2V), and the p-channel stage is active for common-mode input voltages typically less than (VDD - 1.2V). Applications Information Package Power Dissipation Warning: Due to the high output current drive, this op amp can exceed the absolute maximum powerdissipation rating. As a general rule, as long as the peak current is less than or equal to 40mA, the maximum www.maximintegrated.com IN3+, N4+ IN3-, IN4OUT3, OUT4 Inverting Input Shutdown Control. Tie to high for normal operation. Inverting Input to Amplifier 2 Amplifier 2 Output Noninverting Input to Amplifiers 3 Inverting Input to Amplifiers 3 and Amplifiers 3 and 4 Outputs package power dissipation is not exceeded for any of the package types offered. There are some exceptions to this rule, however. The absolute maximum power-dissipation rating of each package should always be verified using the following equations. The equation below gives an approximation of the package power dissipation: PIC(DISS) VRMS IRMS COS where: VRMS = RMS voltage from VDD to VOUT when sourcing current and RMS voltage from VOUT to VSS when sinking current. IRMS = RMS current flowing out of or into the op amp and the load. = phase difference between the voltage and the current. For resistive loads, COS = 1. Maxim Integrated 8 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 RF 3.6V LEFT AUDIO INPUT CIN RIN COUT HEADPHONE JACK TO 32 STEREO HEADSET R C MAX4230 MAX4231 VIN = 2VP-P VBIAS MAX4230 R COUT 32 RIGHT AUDIO INPUT Figure 1. MAX4230/MAX4231 Used in Single-Supply Operation Circuit Example For example, the circuit in Figure 1 has a package power dissipation of 196mW: RMS (VDD - VDC ) + = 3.6V - 1.8V + VPEAK 2 1.0V = 2.507VRMS 2 I 1.8V 1.0V / 32 + IRMS IDC + PEAK = 32 2 2 = 78.4mA RMS where: VDC = the DC component of the output voltage. IDC = the DC component of the output current. VPEAK = the highest positive excursion of the AC component of the output voltage. IPEAK = the highest positive excursion of the AC component of the output current. Therefore: PIC(DISS) = VRMS IRMS COS = 196mW Adding a coupling capacitor improves the package power dissipation because there is no DC current to the load, as shown in Figure 2: CIN RIN RF Figure 2. Circuit Example: Adding a Coupling Capacitor Greatly Reduces Power Dissipation of its Package VRMS VPEAK 2 1.0V = = 0.707VRMS 2 I 1.0V / 32 IRMS IDC + PEAK =0A + 2 2 = 22.1mA RMS Therefore: PIC(DISS) = VRMS IRMS COS = 15.6mW If the configuration in Figure 1 were used with all four of the MAX4234 amplifiers, the absolute maximum power dissipation rating of this package would be exceeded (see the Absolute Maximum Ratings section). 60mW Single-Supply Stereo Headphone Driver Two MAX4230/MAX4231s can be used as a single-supply, stereo headphone driver. The circuit shown in Figure 2 can deliver 60mW per channel with 1% distortion from a single 5V supply. The input capacitor (CIN), in conjunction with RIN, forms a highpass filter that removes the DC bias from the incoming signal. The -3dB point of the highpass filter is given by f -3dB = www.maximintegrated.com 1 2R INC IN Maxim Integrated 9 MAX4230-MAX4234 C1 0.1mF R1 16k R2 82k 0.5VP-P 3V 3V 2 R5 51k C2 0.1F High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 32W fS = 100Hz 1/2 MAX4232 8 3 VCC = 3.0V RL = 100k 1 4 R4 10k R3 10k 6 R6 51k 5 IN 1V/div OUT 1V/div 7 1/2 MAX4232 5s/div Figure 3. Dual MAX4230/MAX4231 Bridge Amplifier for 200mW at 3V Figure 4. Rail-to-Rail Input/Output Range Choose gain-setting resistors RIN and RF according to the amount of desired gain, keeping in mind the maximum output amplitude. The output coupling capacitor, COUT, blocks the DC component of the amplifier output, preventing DC current flowing to the load. The output capacitor and the load impedance form a highpass filer with the -3dB point determined by: Rail-to-Rail Output Stage f -3dB = 1 2R INC OUT For a 32 load, a 100F aluminum electrolytic capacitor gives a low-frequency pole at 50Hz. Bridge Amplifier The circuit shown in Figure 3 uses a dual MAX4230 to implement a 3V, 200mW amplifier suitable for use in sizeconstrained applications. This configuration eliminates the need for the large coupling capacitor required by the single op-amp speaker driver when single-supply operation is necessary. Voltage gain is set to 10V/V; however, it can be changed by adjusting the 82k resistor value. Rail-to-Rail Input Stage The MAX4230-MAX4234 CMOS op amps have parallel connected n- and p-channel differential input stages that combine to accept a common-mode range extending to both supply rails. The n-channel stage is active for common-mode input voltages typically greater than (VSS + 1.2V), and the p-channel stage is active for commonmode input voltages typically less than (VDD -1.2V). www.maximintegrated.com The minimum output is within millivolts of ground for single-supply operation, where the load is referenced to ground (VSS). Figure 4 shows the input voltage range and the output voltage swing of a MAX4230 connected as a voltage follower. The maximum output voltage swing is load dependent; however, it is guaranteed to be within 500mV of the positive rail (VDD = 2.7V) even with maximum load (32 to ground). Observe the Absolute Maximum Ratings for power dissipation and output short-circuit duration (10s, max) because the output current can exceed 200mA (see the Typical Operating Characteristics.) Input Capacitance One consequence of the parallel-connected differential input stages for rail-to-rail operation is a relatively large input capacitance CIN (5pF typ). This introduces a pole at frequency (2RCIN)-1, where R is the parallel combination of the gain-setting resistors for the inverting or noninverting amplifier configuration (Figure 5). If the pole frequency is less than or comparable to the unity-gain bandwidth (10MHz), the phase margin is reduced, and the amplifier exhibits degraded AC performance through either ringing in the step response or sustained oscillations. The pole frequency is 10MHz when R = 2k. To maximize stability, R << 2k is recommended. Maxim Integrated 10 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 2500 Rf VIN R MAX4230 VOUT R' = R || Rf RfCf = RCIN CAPACITIVE LOAD (pF) Cf INVERTING 2000 UNSTABLE 1500 STABLE 1000 500 0 VDD = 5.0V RL TO VDD/2 1 10 100 1k 10k 100k RESISTIVE LOAD () NONINVERTING VIN Figure 6. Capacitive-Load Stability MAX4230 VOUT Rf 20mV/div Cf R' = R || Rf RfCf = RCIN R 20mV/div VDD = 3.0V, CL = 1500pF RL = 100k, RISO = 0 1/div Figure 5. Inverting and Noninverting Amplifiers with Feedback Compensation Figure 7. Small-Signal Transient Response with Excessive Capacitive Load To improve step response when R > 2k, connect small capacitor Cf between the inverting input and output. Choose Cf as follows: Cf = 8(R/Rf) [pf] where Rf is the feedback resistor and R is the gain-setting resistor (Figure 5). 20mV/div Driving Capacitive Loads The MAX4230-MAX4234 have a high tolerance for capacitive loads. They are stable with capacitive loads up to 780pF. Figure 6 is a graph of the stable operating region for various capacitive loads vs. resistive loads.Figures 7 and 8 show the transient response with excessive capacitive loads (1500pF), with and without the addition of an isolation resistor in series with the output. Figure 9 shows a typical noninverting capacitive-load-driving circuit in the unity-gain configuration. www.maximintegrated.com 20mV/div VDD = 3.0V, CL = 1500pF RL = 100k, RISO = 39 1/div Figure 8. Small-Signal Transient Response with Excessive Capacitive Load with Isolation Resistor Maxim Integrated 11 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 SHDN 2V/div IDD 1mA/div RISO CL OUT 2V/div 100s/div Figure 9. Capacitive-Load-Driving Circuit 1V/div Figure 11. Shutdown Enable/Disable Supply Current VDD 2V/div IDD 1mA/div 1V/div 4s/div 40s/div Figure 10. Shutdown Output Voltage Enable/Disable Figure 12. Power-Up/Down Supply Current The resistor improves the circuit's phase margin by isolating the load capacitor from the op amp's output. Selector Guide Power-Up and Shutdown Modes The MAX4231/MAX4233 have a shutdown option. When the shutdown pin (SHDN) is pulled low, supply current drops to 0.5A per amplifier (VDD = 2.7V), the amplifiers are disabled, and their outputs are driven to VSS. Since the outputs are actively driven to VSS in shutdown, any pullup resistor on the output causes a current drain from the supply. Pulling SHDN high enables the amplifier. In the dual MAX4233, the two amplifiers shut down independently. Figure 10 shows the MAX4231's output voltage to a shutdown pulse. The MAX4231-MAX4234 typically settle within 5s after power-up. Figures 11 and 12 show IDD to a shutdown plus and voltage power-up cycle. www.maximintegrated.com PART AMPS PER PACKAGE SHUTDOWN MODE MAX4230 Single -- MAX4231 Single Yes MAX4232 Dual -- MAX4233 Dual Yes MAX4234 Quad -- When exiting shutdown, there is a 6s delay before the amplifier's output becomes active (Figure 10). Maxim Integrated 12 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Pin/Bump Configurations TOP VIEW IN+ 1 VSS 2 + 5 VDD IN+ 1 + 6 VDD VSS 2 5 SHDN IN- 3 4 OUT MAX4231 IN- 3 4 OUT SC70/SOT23 1 IN1- 2 IN1+ 3 10 VDD MAX4233 VSS 4 A 9 OUT2 VSS 6 5 4 OUT1 1 2 OUT 1 2 3 8 VDD 3 1 IN+ VSS IN- A VDD 2 OUT2 3 IN2- IN2+ MAX4232 MAX4231 VDD MAX4233 4 SHDN2 OUT1 1 + 14 OUT4 13 IN4- IN1- 2 VSS VDD 4 12 IN4+ MAX4234 IN+ IN- SHDN C UCSP Power Supplies and Layout The MAX4230-MAX4234 can operate from a single 2.7V to 5.5V supply, or from dual 1.35V to 2.5V supplies. or single-supply operation, bypass the power supply with a 0.1F ceramic capacitor. For dual-supply operation, bypass each supply to ground. Good layout improves performance by decreasing the amount of stray capacitance at the op amps' inputs and outputs. Decrease stray capacitance by placing external components close to the op amps' pins, minimizing trace and lead lengths. OUT1 IN1- IN1+ SHDN1 9 IN3- IN2- 6 8 OUT3 OUT2 7 UCSP 11 VSS 10 IN3+ IN2+ 5 B 6 IN2- SOT23/MAX IN1+ 3 B 7 OUT2 5 IN2+ VSS 4 6 SHDN2 MAX + IN1+ 3 Thin DFN (Ultra-Thin LGA) 8 IN27 IN2+ SHDN1 5 OUT MAX4231 + SOT23/SC70 OUT1 1 SHDN IN1- 2 MAX4230 + VDD TSSOP/SO Ordering Information (continued) PART TEMP RANGE PINPACKAGE TOP MARK MAX4232AKA+T -40C to +125C 8 SOT23 AAKW MAX4232AUA+T -40C to +125C 8 MAX -- MAX4233AUB+T -40C to +125C 10 MAX -- MAX4233ABC+T -40C to +125C 10 UCSP ABF MAX4234AUD -40C to +125C 14 TSSOP -- MAX4234AUD/V+ -40C to +125C 14 TSSOP +YWD MAX4234ASD -40C to +125C 14 SO -- +Denotes a lead-free(Pb)/RoHS-compliant package. T = Tape and reel. /V denotes an automotive-qualified part. *EP = Exposed pad. www.maximintegrated.com Maxim Integrated 13 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. LAND PATTERN NO. 5 SC70 X5+1 21-0076 90-0188 6 SC70 X6SN+1 21-0077 90-0189 5 SOT23 U5+1 21-0057 90-0174 6 SOT23 U6SN+1 21-0058 90-0175 8 MAX U8+1 21-0036 90-0092 8 SOT23 K8+5 21-0078 90-0176 10 MAX U10+2 21-0061 90-0330 10 UCSP B12+4 21-0104 -- 6 UCSP R61A1+1 21-0228 -- 6 Thin DFN (Ultra-Thin LGA) Y61A1+1 21-0190 90-0233 14 TSSOP U14+1 21-0066 90-0113 14 SO S14+1 21-0041 90-0112 www.maximintegrated.com Maxim Integrated 14 MAX4230-MAX4234 High-Output-Drive, 10MHz, 10V/s, Rail-to-Rail I/O Op Amps with Shutdown in SC70 Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 7 7/08 Added 6-pin DFN package for the MAX4231 8 10/08 Corrected top mark for MAX4321, 6 SOT23 package; changed MAX4320 and 4321 to lead-free packages 9 10/08 Added shutdown pin limits 10 12/08 Added automotive part number 11 9/09 Corrected top mark designation and pin configuration, and added UCSP package 12 1/10 Updated Absolute Maximum Ratings section 2 13 1/11 Added 10 MAX to Package Information section 14 14 10/11 Updated Electrical Characteristics table with specs for bias current at various temperatures 1-4 15 3/12 Updated thermal data in the Absolute Maximum Ratings 2 16 6/12 Added automotive part number for MAX4230 1 17 12/13 Updated tENABLE specification in the AC Electrical Characteristics 6 18 10/14 Corrected DFN references and added ultra-thin LGA reference to Ordering Information, Pin Configurations, and Package Information 19 1/15 Updated General Description, Applications, and Benefits and Features sections DESCRIPTION 1, 2, 8, 13 1 3, 4 13 1, 2, 8, 13 1, 13, 14 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. (c) 2015 Maxim Integrated Products, Inc. 15 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX4234AUD/V+ MAX4234AUD/V+T MAX4233ABC+TG45 MAX4232AKA-T MAX4233AUB MAX4233AUB-T MAX4234ASD MAX4234ASD-T MAX4234AUD MAX4234AUD-T