19-2136; Rev 1; 9/01 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute The MAX4335-MAX4338 have 90dB power-supply rejection ratio (PSRR), eliminating the need for costly pre-regulation in most audio applications. Both the input voltage range and the output voltage swing include both supply rails, maximizing dynamic range. The MAX4335/MAX4336 single amplifiers are available in ultra-small 6-pin SC70 packages. The MAX4337/ MAX4338 dual amplifiers are available in an 8-pin SOT23 and a 10-pin MAX package, respectively. All devices are specified from -40C to +85C. ________________________Applications 32 Headphone Drivers Portable/Battery-Powered Instruments Wireless PA Control Hands-Free Car Phones Transformer/Line Drivers DAC/ADC Buffers Features 50mA Output Drive Capability Low 0.003% THD (20kHz into 10k) Rail-to-Rail(R) Inputs and Outputs 2.7V to 5.5V Single-Supply Operation 5MHz Gain-Bandwidth Product 95dB Large-Signal Voltage Gain 90dB Power-Supply Rejection Ratio No Phase Reversal for Overdrive Inputs Ultra-Low Power Shutdown/Mute Mode Reduces Supply Current to 0.04A Places Output in High-Impedance State Thermal Overload Protection Ordering Information TEMP RANGE PINPACKAGE MAX4335EXT-T -40C to +85C 6 SC70-6 AAX MAX4336EXT-T -40C to +85C 6 SC70-6 AAW MAX4337EKA-T -40C to +85C 8 SOT23-8 AAIK MAX4337EUA -40C to +85C 8 MAX -- MAX4338EUB -40C to +85C 10 MAX -- PART TOP MARK Pin Configurations appear at end of data sheet. Typical Operating Circuit VCC TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 0.005 RL = 10k, VCC = 5V VOUT = 2VP-P R3 C1 VIN THD + NOISE (%) C2 MAX4335 MAX4336 R4 32 0.004 0.003 R2 R1 C3 0.002 10 100 1k 10k 100k FREQUENCY (Hz) Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX4335-MAX4338 General Description The MAX4335-MAX4338 op amps deliver 40mW per channel into 32 from ultra-small SC70/SOT23 packages making them ideal for mono/stereo headphone drivers in portable applications. These amplifiers have a 5MHz gain-bandwidth product and are guaranteed to deliver 50mA of output current while operating from a single supply of 2.7V to 5.5V. The MAX4336 and the MAX4338 have a shutdown/mute mode that reduces the supply current to 0.04A per amplifier and places the outputs in a high-impedance state. MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to GND) ..................................-0.3V to +6V All Other Pins to GND ....................(GND - 0.3V) to (VCC + 0.3V) Output Short-Circuit Duration to VCC or GND ............Continuous Continuous Power Dissipation (TA = +70C) 6-Pin SC70 (derate 3.1mW/C above +70C) ...............245mW 8-Pin SOT23 (derate 9.1mW/C above +70C).............727mW 8-Pin MAX (derate 4.5mW/C above +70C) ..............362mW 10-Pin MAX (derate 5.6mW/C above +70C) .............444mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C 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 (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VSHDN = VCC, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN Inferred from PSRR Test 2.7 TYP MAX UNITS 5.5 V Operating Supply Voltage Range VCC Quiescent Supply Current (Per Amplifier) ICC Input Offset Voltage VOS VCM = GND to VCC 0.6 3 IB VCM = GND to VCC 100 400 nA IOS VCM = GND to VCC 7 30 nA |VIN- - VIN+| < 1.2V 500 |VIN- - VIN+| > 1.2V 8.4 Input Bias Current Input Offset Current Differential Input Resistance Input Common-Mode Voltage Range RIN(Diff) VCM VCC = 5.5V 1.3 VCC = 2.7 1.2 Inferred from CMRR Test GND Common-Mode Rejection Ratio CMRR VCM = GND to VCC 60 Power-Supply Rejection Ratio PSRR VCC = 2.7V to 5.5V 70 Output Resistance ROUT AVCL = 1V/V VCC = 5V: RL = 10k VOUT = 0.4V to 4.6V Large-Signal Voltage Gain AVOL Output Voltage Swing VOUT 2 90 dB 0.05 95 VCC = 2.7V: RL = 32 VOUT = 0.5V to 2.2V 62 72 VCC = 5V; RL = 100 V dB 84 VCC = 5V; RL = 10k mV 80 70 VCC = 2.7V; RL = 32 mA k VCC VCC = 5V: RL = 100 VOUT = 0.5V to 4.5V VCC = 2.7V; RL = 10k 1.8 dB VCC - VOH 100 VOL 100 VCC - VOH 220 400 VOL 280 400 VCC - VOH 100 VOL 100 VCC - VOH 190 350 VOL 240 350 _______________________________________________________________________________________ mV SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute MAX4335-MAX4338 DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VSHDN = VCC, TA = +25C, unless otherwise noted.) PARAMETER Output Drive SYMBOL CONDITIONS MIN TYP MAX VCC = 2.7V; ISOURCE, ISINK = 50mA VCC - VOH 270 500 VOL 360 500 VCC = 5V; ISOURCE, ISINK = 50mA VCC - VOH 270 500 VOL 360 500 IOUT Short-Circuit Current mV ISC 110 VIH Normal mode VIL Shutdown mode IIL VCC = 5V, GND < VSHDN < VCC Output Leakage Current in Shutdown IOUT(SHDN) VCC = 5V, VSHDN = 0, VOUT = 0, VCC Shutdown Supply Current (Per Amplifier) ICC(SHDN) SHDN = GND; VCC = 5V SHDN Logic Levels SHDN Leakage Current UNITS mA 0.7 x VCC 0.3 x VCC V 0.5 A 0.01 0.5 A <0.04 0.5 A DC ELECTRICAL CHARACTERISTICS (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VSHDN = VCC, TA = -40C to +85C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL Operating Supply Voltage Range VCC Inferred from PSRR test Quiescent Supply Current (Per Amplifier) ICC VCC = 5.5V Input Offset Voltage VOS Input Bias Current CONDITIONS MIN MAX UNITS 5.5 V 2.25 mA VCM = GND to VCC 6 mV 2.7 TYP IB VCM = GND to VCC 600 nA Input Offset Current IOS VCM = GND to VCC 60 nA Input Common-Mode Voltage Range VCM Inferred from CMRR test VCC V GND Common-Mode Rejection Ratio CMRR VCM = GND to VCC 50 dB Power-Supply Rejection Ratio PSRR VCC = 2.7V to 5.5V 64 dB VCC = 5V: RL = 100, VOUT = 0.6V to 4.4V 66 VCC = 2.7V: RL = 32, VOUT = 0.6V to 2.1V 56 Large-Signal Voltage Gain AVOL dB _______________________________________________________________________________________ 3 MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VSHDN = VCC, TA = -40C to +85C, unless otherwise noted.) (Note 1) PARAMETER Output Voltage Swing Output Drive SHDN Logic Level SHDN Leakage Current SYMBOL VOUT CONDITIONS MIN TYP MAX VCC - VOH 500 VOL 500 VCC = 5V; RL = 100 VCC - VOH 400 VOL 400 VCC = 2.7V; ISOURCE, ISINK = 50mA VCC - VOH 650 VOL 650 VCC = 5V; ISOURCE, ISINK = 50mA VCC - VOH 650 VOL 650 VCC = 2.7V; RL = 32 IOUT UNITS mV mV VIH Normal mode VIL Shutdown mode 0.7 x VCC IIL 0.3 x VCC V VCC = 5V, GND < VSHDN < VCC 1 A Output Leakage Current in Shutdown V = 5V, VSHDN = 0, VOUT = 0; IOUT(SHDN) CC VCC 1 A Shutdown Supply Current (Per Amplifier) ICC(SHDN) VSHDN = 0; VCC = 5V 1 A AC ELECTRICAL CHARACTERISTICS (VCC = 2.7V, GND = 0, VCM = VCC/2, VOUT = VCC/2, VSHDN = VCC, AVCL = 1V/V, CL = 15pF, RL = to VCC/2, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL Gain-Bandwidth Product GBWP Full-Power Bandwidth FBWP CONDITIONS TYP 5 VOUT = 2VP-P, VCC = 5V MAX UNITS MHz 280 kHz SR 1.8 V/s Phase Margin PM 70 degrees Gain Margin GM 18 dB Slew Rate VCC = 5V, RL = 100, VOUT = 2VP-P Total Harmonic Distortion 4 MIN THD f = 1kHz 0.005 f = 10kHz 0.02 VCC = 5V, RL = 10k, VOUT = 2VP-P, f = 10kHz VCC = 2.7V; f = 1kHz RL = 32, f = 10kHz VOUT = 2VP-P 0.003 0.01 0.03 _______________________________________________________________________________________ % SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute MAX4335-MAX4338 AC ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V, GND = 0, VCM = VCC/2, VOUT = VCC/2, VS HDN = VCC, AVCL = 1V/V, CL = 15pF, RL = to VCC/2, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL Settling Time to 0.01% CONDITIONS tS 2V step Crosstalk CT VOUT = 2VP-P; f = 1kHz Input Capacitance CIN Input Voltage-Noise Density en Input Current-Noise Density In MIN TYP f = 10kHz dB 5 pF nV/Hz 0.6 pA/Hz f = 1kHz No sustained oscillation Enable Time from Shutdown 100 26 f = 10kHz UNITS s f = 1kHz Capacitive-Load Stability Shutdown Time MAX 2 200 pF tSHDN 1 s tENABLE 1 s tON 5 s Power-Up Time Note 1: All devices are 100% production tested at TA = +25C. All limits over temperature are guaranteed by design. __________________________________________Typical Operating Characteristics (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VS HDN = VCC, TA = +25C, unless otherwise noted.) 1.2 VCC = 2.7V 1.1 2.1 2.0 1.9 1.8 1.7 -15 10 35 TEMPERATURE (C) 60 85 800 700 600 VCC = 5.5V 500 400 300 VCC = 2.7V 100 0 1.5 -40 900 200 1.6 1.0 MAX4335-8 toc03 2.2 SUPPLY CURRENT (pA) VCC = 5.5V 1000 MAX4335-8 toc02 MAX4335-8 toc01 1.3 2.3 MINIMUM OPERATING VOLTAGE (V) SUPPLY CURRENT (mA) 1.4 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE MINIMUM OPERATING VOLTAGE vs. TEMPERATURE SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE -40 -15 10 35 TEMPERATURE (C) 60 85 -40 -15 10 35 60 85 TEMPERATURE (C) _______________________________________________________________________________________ 5 Typical Operating Characteristics (continued) (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VS HDN = VCC, TA = +25C, unless otherwise noted.) INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE 0.4 0.2 0 -0.2 -0.4 VCC = 5.5V 50 0 -50 -100 SC70 -0.6 200 50 VCM = VCC VCC = 2.7V 0 -50 VCM = 0 VCC = 2.7V -100 -150 VCM = 0 VCC = 5.5V -200 -200 -15 10 35 60 -250 0 85 1 2 3 4 5 -40 6 10 35 60 TEMPERATURE (C) COMMON-MODE REJECTION RATIO vs. TEMPERATURE OUTPUT LOW VOLTAGE vs. TEMPERATURE OUTPUT HIGH VOLTAGE vs. TEMPERATURE 83 82 VCC = 5.5V RL = 100 440 81 VCC = 2.7V RL = 100 400 360 320 280 240 200 VCC = 2.7V RL = 100 VCC = 5.5V RL = 100 160 350 80 -15 10 35 60 85 200 150 100 VCC = 5.5V RL = 100 VCC = 2.7V RL = 100 0 -40 85 VCC = 2.7V RL = 100 250 50 120 80 VCC = 5.5V RL = 100 300 OUTPUT HIGH VOLTAGE (mV) MAX4335-8 toc07 84 480 MAX4335-8 toc08 COMMON-MODE VOLTAGE (V) 85 -40 -15 TEMPERATURE (C) OUTPUT LOW VOLTAGE (mV) -40 -15 10 35 60 85 -40 -15 10 35 60 85 TEMPERATURE (C) TEMPERATURE (C) TEMPERATURE (C) OUTPUT CURRENT vs. OUTPUT VOLTAGE (SINKING) OUTPUT CURRENT vs. OUTPUT VOLTAGE (SOURCING) LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SINKING, VCC = 5.5V) VCC = 5.5V 150 VCC = 2.7V 100 50 150 VCC = 2.7V 100 0.4 0.8 OUTPUT VOLTAGE (V) 1.2 1.6 95 RL = 1k 85 75 65 55 0 0 RL = 100k 105 RL = 100 50 0 RL REFERENCED TO VCC 115 LARGE-SIGNAL GAIN (dB) 200 OUTPUT CURRENT (mA) 200 250 MAX4335 toc11 VCC = 5.5V MAX4335 toc10 250 MAX4335 toc12 CMRR (dB) 100 -150 -1.0 6 VCM = VCC VCC = 5.5V 150 -0.8 MAX4335-8 toc06 VCC = 2.7V INPUT BIAS CURRENT (nA) MAX 0.6 100 MAX4335 toc05 INPUT OFFSET VOLTAGE (mV) 0.8 INPUT BIAS CURRENT (nA) MAX4335-8 toc04 1.0 INPUT BIAS CURRENT vs. TEMPERATURE MAX4335-8 toc09 INPUT OFFSET VOLTAGE vs. TEMPERATURE OUTPUT CURRENT (mA) MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute 0 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT VOLTAGE (V) 1.4 1.6 0 0.1 0.2 0.3 OUTPUT VOLTAGE (V) _______________________________________________________________________________________ 0.4 0.5 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute 100 90 RL = 100 80 70 RL REFERENCED TO VCC 105 RL = 100k 60 95 RL = 100k 85 RL = 100 75 65 RL = 1k 55 90 RL = 100k RL = 100 RL = 1k 80 70 RL = 32 60 45 50 35 40 0.5 0.1 LARGE-SIGNAL GAIN vs. TEMPERATURE 100 GAIN (dB) VCC = 5V RL = 100 80 VCC = 2.7V RL = 32 70 60 50 -15 10 35 60 0.5 0.05 0.15 0.25 0.35 0.45 0.55 0.65 0.75 GAIN AND PHASE vs. FREQUENCY GAIN AND PHASE vs. FREQUENCY (CL = 200pF) MAX4335-8 toc17 MAX4335-8 toc18 70 180 60 50 144 50 144 40 108 40 108 30 72 30 72 20 36 20 36 10 0 AVCL = 1000V/V AVCL = 1000V/V 180 10 0 0 -36 0 -36 -10 -72 -10 -72 -108 -20 -108 -20 -30 -144 10M -30 1k 10k 100k 1M 100 1k 10k 100k 1M -144 10M TEMPERATURE (C) FREQUENCY (Hz) FREQUENCY (Hz) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY OUTPUT IMPEDANCE vs. FREQUENCY TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY -20 -30 -40 -50 -60 -70 -80 -90 10 1 AV = 1 0.1 MAX4335/8 toc21 0.040 VCC = 5V VOUT = 2VP-P 500kHz LOWPASS FILTER RL = 10k to VCC/2 0.035 0.030 THD + NOISE (%) -10 100 MAX4335-8 toc20 MAX4335-8 toc19 10 0 216 216 100 85 OUTPUT IMPEDANCE () -40 0.4 OUTPUT VOLTAGE (V) 60 VCC = 2.7V RL = 100k 90 0.3 OUTPUT VOLTAGE (V) 70 MAX4335 toc16 110 0.2 GAIN (dB) 0.2 0.3 0.4 OUTPUT VOLTAGE (V) PHASE (DEGREES) 0.1 LARGE-SIGNAL GAIN (dB) 100 RL REFERENCED TO VCC/2 50 PSRR (dB) 110 0.025 0.020 0.015 0.010 0.005 -100 -110 0 0.01 100 1k 10k 100k FREQUENCY (Hz) 1M 10M 1k 10k 100k FREQUENCY (Hz) 1M 10M 10 100 1k 10k 100k FREQUENCY (Hz) _______________________________________________________________________________________ 7 PHASE (DEGREES) RL = 1k LARGE-SIGNAL GAIN (dB) LARGE-SIGNAL GAIN (dB) 110 115 LARGE-SIGNAL GAIN (dB) RL REFERENCED TO VCC/2 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SOURCING, VCC = 2.7V) MAX4335 toc14 MAX4335 toc13 120 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SINKING, VCC = 2.7V) MAX4335 toc15 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (SOURCING, VCC = 5.5V) MAX4335-MAX4338 Typical Operating Characteristics (continued) (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VS HDN = VCC, TA = +25C, unless otherwise noted.) ____________________________Typical Operating Characteristics (continued) (VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = to VCC/2, VS HDN = VCC, TA = +25C, unless otherwise noted.) CHANNEL-TO-CHANNEL ISOLATION vs. FREQUENCY RL = 100 1 RL = 1k 0.1 RL = 100k 0.01 -60 MAX4335/8 toc23 FREQUENCY = 10kHz CHANNEL-TO-CHANNEL ISOLATION MAX4335 toc22 10 SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) -70 IN 20mV/div -80 -90 OUT 20mV/div -100 -110 3.5 4.0 4.5 5.0 10 5.5 100 1k 10k 100k 1M 10M FREQUENCY (Hz) SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) MAX4335 toc25 PEAK-TO-PEAK OUTPUT VOLTAGE (V) VCC = 5V 200ns/div LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) VCC = 5V IN 20mV/div IN 2V/div IN 2V/div OUT 20mV/div OUT 2V/div OUT 2V/div 200ns/div 2s/div _______________________________________________________________________________________ 2s/div MAX4335 toc27 3.0 MAX4335 toc26 0.001 8 MAX4335 toc24 TOTAL HARMONIC DISTORTION PLUS NOISE vs. PEAK-TO-PEAK OUTPUT VOLTAGE THD + NOISE (%) MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute L INPUT VREF MAX4338 MUTE R INPUT Pin Description PIN NAME MAX4337 MAX4335 MAX4336 FUNCTION MAX4338 SOT23 MAX + + IN1 , IN2 1 1 3, 5 3, 5 3, 7 2 2 4 4 4 3 3 2, 6 2, 6 2, 8 GND IN2 , IN2 4 4 1, 7 1, 7 1, 9 OUT1, OUT2 5 -- -- -- -- N.C. -- 5 -- -- 5, 6 SHDN1, SHDN2 6 6 8 8 10 VCC Noninverting Input Ground Inverting Input Output(s) No Connection. Not internally connected. Drive SHDN low for shutdown. Drive SHDN high or connect to VCC for normal operation. Positive Supply _______________________________________________________________________________________ 9 MAX4335-MAX4338 Typical Application Circuit MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute Applications Information 5.5V Package Power Dissipation Warning: Due to the high-output-current drive, this op amp can exceed the absolute maximum power-dissipation rating. As a general rule, as long as the peak current is less than or equal to 50mA, the maximum package power dissipation will not be 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 following equation gives an approximation of the package power dissipation: R C VIN = 2VP-P MAX4335 MAX4336 R 32 PIC(DISS) VRMS IRMS COS where: VRMS = the RMS voltage from VCC to VOUT when sourcing current = the RMS voltage from V OUT to V EE when sinking current IRMS = the RMS current flowing out of or into the op amp and the load = the phase difference between the voltage and the current. For resistive loads, COS = 1. Figure 1. A Circuit Example where the MAX4335/MAX4336 is Dissipating High Power 5.5V R CIN VIN = 2VP-P For example, the circuit in Figure 1 has a package power dissipation of 220mW. ( ) CC > 1V = 2.043VRMS 2 2.75V 1V / 32 = + 32 2 2 = 108mARMS Therefore, PIC(DISS) = VRMS IRMS COS = 220mW Adding a coupling capacitor improves the package power dissipation because there is no DC current to the load, as shown in Figure 2. ( ) VPEAK VRMS VCC - VDC - 2 = 5.5V - 2.75V - 1V = 2.043VRMS 2 I IRMS IDC + PEAK 2 = 22mARMS 10 MAX4335 MAX4336 32 2 = 5.5V - 2.75V - IRMS IDC + R VPEAK VRMS VCC - VDC - IPEAK CC = 0A + 1 2 RL fL WHERE fL IS THE LOW-FREQUENCY CUTOFF Figure 2. A Circuit Example where Adding a Coupling Capacitor Greatly Reduces the Power Dissipation of Its Package Therefore, PIC(DISS) = VRMS IRMS COS = 45mW The absolute maximum power-dissipation rating of the package may be exceeded if the configuration in Figure 1 is used with the MAX4335/MAX4336 amplifiers at a high ambient temperature of 79C (220.6mW/C plus a derating of 3.1mW/C x 9C = 247.9mW). Note that the 247.9mW just exceeds the absolute maximum power dissipation of 245mW for the 6-pin SC70 package. 1V / 32 2 ______________________________________________________________________________________ SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute Rail-to-Rail Input Stage Devices in the MAX4335-MAX4338 family of highoutput-current amplifiers have rail-to-rail input and output stages designed for low-voltage, single-supply operation. The input stage consists of separate NPN and PNP differential stages that combine to provide an input common-mode range that extends 0.25V beyond the supply rails. The PNP stage is active for input voltages close to the negative rail, and the NPN stage is active for input voltages near the positive rail. The switchover transition region, which occurs near VCC/2, has been extended to minimize the slight degradation in common-mode rejection ratio caused by mismatch of the input pairs. Since the input stage switches between the NPN and PNP pairs, the input bias current changes polarity as the input voltage passes through the transition region. Match the effective impedance seen by each input to reduce the offset error caused by input bias currents flowing through external source impedances (Figures 3 and 5). High source impedances, together with input capacitance, can create a parasitic pole that produces an underdamped signal response. Reducing the input impedance or placing a small (2pF to 10pF) capacitor across the feedback resistor improves response. The MAX4335-MAX4338's inputs are protected from large differential input voltages by 1k series resistors and back-to-back double diodes across the inputs (Figure 5). For differential voltages less than 1.2V, input resistance is typically 500k. For differential input voltages greater than 1.2V, input resistance is approximately 8.4k. The input bias current is given by the following equation: IBIAS = (VDIFF - 1.2V) / 8.4k MAX4335-MAX4338 Single-Supply Speaker Driver The MAX4335/MAX4336 can be used as a single-supply speaker driver, as shown in the Typical Operating Circuit. Capacitor C1 is used for blocking DC (a 0.1F ceramic capacitor can be used). When choosing resistors R3 and R4, take into consideration the input bias current as well as how much supply current can be tolerated. Choose resistors R1 and R2 according to the amount of gain and current desired. Capacitor C3 ensures unity gain for DC. A 10F electrolytic capacitor is suitable for most applications. The coupling capacitor C2 sets a low-frequency pole and is fairly large in value. For a 32 load, a 100F coupling capacitor gives a low-frequency pole at 50Hz. The low-frequency pole can be set according to the following equation: = 1 / 2 (RLC2) MAX4335-MAX4338 R3 R3 = R1 R2 R1 R2 Figure 3. Reducing Offset Error Due to Bias Current (Noninverting) MAX4335-MAX4338 R3 R3 = R1 R2 R1 R2 Figure 4. Reducing Offset Error Due to Bias Current (Inverting) Rail-to-Rail Output Stage The minimum output is within millivolts of ground for single-supply operation, where the load is referenced to ground (GND). Figure 6 shows the input voltage range and the output voltage swing of a MAX4335 connected as a voltage follower. The maximum output voltage swing is load dependent; however, it is guaranteed to be within 400mV of the positive rail (VCC = 2.7V) even with maximum load (32 to VCC/2). Driving Capacitive Loads The MAX4335-MAX4338 have a high tolerance for capacitive loads. They are stable with capacitive loads up to 200pF. Figure 7 is a graph of the stable operating region for various capacitive loads vs. resistive loads. ______________________________________________________________________________________ 11 MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute 4.2k 4.2k Figure 5. Input Protection Circuit Figures 8 and 9 show the transient response with excessive capacitive loads (330pF), with and without the addition of an isolation resistor in series with the output. Figure 10 shows a typical noninverting capacitive-load-driving circuit in the unity-gain configuration. The resistor improves the circuit's phase margin by isolating the load capacitor from the op amp's output. Power-Up and Shutdown/Mute Modes The MAX4336/MAX4338 have a shutdown option. When the shutdown pin (SHDN) is pulled low, supply current drops to 0.04A per amplifier (VCC = 5V), the amplifiers are disabled, and their outputs are placed in a high-impedance state. Pulling SHDN high enables the amplifier. In the dual MAX4338, the two amplifiers shut down independently. Figure 11 shows the MAX4336's output voltage response to a shutdown pulse. The MAX4335-MAX4338 typically settle within 5s after power-up (Figure 12). Power Supplies and Layout The MAX4335-MAX4338 can operate from a single 2.7V to 5.5V supply. Bypass the power supply with a 0.1F ceramic capacitor in parallel with at least 1F. 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' input/output pins, minimizing trace and lead lengths. 12 Thermal Overload Protection The MAX4335-MAX4338 includes thermal overload protection circuitry. When the junction temperature of the device exceeds +140C, the supply current drops to 120A per amplifier (VCC = 5V) and the outputs are placed in a high-impedance state. The device returns to normal operation when the junction temperature falls to below +120C. Short-Circuit Current Protection The MAX4335-MAX4338 incorporate a smart short-circuit protection feature. Figure 7 shows the output voltage region where the protection circuitry is active. A fault condition occurs when IOUT > 110mA and VOUT > 1V (sinking current) or when IOUT > 110mA and (VCC VOUT) > 1V (sourcing current). When a fault is detected, the short-circuit protection circuitry is activated and the output current is limited to 110mA, protecting the device and the application circuitry. When the smart short circuit is not active, the output current can safely exceed 110mA (see the Output Current vs. Output Voltage Graph in the Typical Operating Characteristics). ______________________________________________________________________________________ SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute MAX4335-MAX4338 VOUT VCC IN SOURCE MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT ACTIVATED FOR (VCC - VOUT) < 1V. OUTPUT CURRENT CAN SAFELY EXCEED 110mA. IN (1V/div) VCC - 1V SHORT-CIRCUIT PROTECTION CIRCUITRY LIMITS OUTPUT CURRENT TO 110mA OUT (1V/div) 1V IN SINK MODE, SHORT-CIRCUIT PROTECTION CIRCUITRY IS NOT ACTIVATED FOR VOUT < 1V. OUTPUT CURRENT CAN SAFELY EXCEED 110mA. 0 CAPACITIVE LOAD (pF) MAX4335-fig07 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 VCC = 5.0V RL to VCC/2 IN (20mV/div) UNSTABLE REGION OUT (20mV/div) STABLE REGION 10 100 VCC = 3.0V, CL = 330pF RL = 100k, RISO = 0 MAX4335-fig08 Figure 7. Short-Circuit Protection Figure 6. Rail-to-Rail Input/Output Range 1k 10k 100k 1s/div RESISTIVE LOAD () Figure 8. Capacitive-Load Stability Figure 9. Small-Signal Transient Response with Excessive Capacitive Load ______________________________________________________________________________________ 13 VCC = 3.0V, CL = 330pF RL = 100k, RISO = 39 IN (20mV/div) RISO MAX4336 CL OUT (20mV/div) 1s/div Figure 11. Capacitive-Load-Driving Circuit MAX4335-fig12 Figure 10. Small-Signal Transient Response with Excessive Capacitive Load with Isolation Resistor MAX4335-fig11 MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute VCC 1V/div SHDN 1V/div OUT 1V/div OUT 2V/div 5s/div Figure 12. Shutdown Output Voltage Enable/Disable 14 5s/div Figure 13. Power-Up/Down Output Voltage ______________________________________________________________________________________ SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute TOP VIEW IN+ 1 GND 2 IN - 6 MAX4335 MAX4336 3 VCC OUT1 1 IN1- 2 5 4 SHDN (N.C.) OUT SC70 8 VCC 7 OUT2 MAX4337 IN1+ 3 6 IN2- GND 4 5 IN2+ SOT23/MAX 10 VCC OUT1 1 IN1- 2 IN1+ 3 GND SHDN1 9 OUT2 8 IN2- 4 7 IN2+ 5 6 SHDN2 MAX4338 MAX ( ) MAX4335 ONLY ___________________Chip Information MAX4335 TRANSISTOR COUNT: 1200 MAX4336 TRANSISTOR COUNT: 1200 MAX4337 TRANSISTOR COUNT: 2400 MAX4338 TRANSISTOR COUNT: 2400 PROCESS: BiCMOS ______________________________________________________________________________________ 15 MAX4335-MAX4338 Pin Configurations Package Information 4X S 8 E y 0.500.1 8 INCHES DIM A A1 A2 b H c D e E H 0.60.1 1 L 1 0.60.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6 0 0.0207 BSC 8LUMAXD.EPS (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0 6 0.5250 BSC TOP VIEW A1 A2 e FRONT VIEW A c b L SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 SOT23, 8L.EPS MAX4335-MAX4338 SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute 16 ______________________________________________________________________________________ SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O Op Amps with Shutdown/Mute 10LUMAX.EPS e 4X S 10 INCHES 10 H y 0.500.1 0.60.1 1 1 0.60.1 BOTTOM VIEW TOP VIEW D2 MILLIMETERS MAX DIM MIN 0.043 A 0.002 0.006 A1 A2 0.030 0.037 0.116 0.120 D1 D2 0.114 0.118 E1 0.116 0.120 0.118 E2 0.114 0.199 H 0.187 L 0.0157 0.0275 L1 0.037 REF b 0.007 0.0106 e 0.0197 BSC c 0.0035 0.0078 0.0196 REF S 0 6 MAX MIN 1.10 0.05 0.15 0.75 0.95 2.95 3.05 3.00 2.89 3.05 2.95 2.89 3.00 4.75 5.05 0.40 0.70 0.940 REF 0.177 0.270 0.500 BSC 0.090 0.200 0.498 REF 0 6 E2 GAGE PLANE A2 c A b D1 A1 FRONT VIEW E1 L L1 SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 10L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0061 REV. I 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX4335-MAX4338 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)