19-1192; Rev 3; 2/98 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown Applications Portable/Battery-Powered Equipment Data-Acquisition Systems Signal Conditioning Low-Power, Low-Voltage Applications ____________________________Features 3MHz Gain-Bandwidth Product 245A Quiescent Current per Amplifier Available in Space-Saving SOT23-5 Package (MAX4330) +2.3V to +6.5V Single-Supply Operation Rail-to-Rail Input Common-Mode Voltage Range Rail-to-Rail Output Voltage Swing 250V Offset Voltage Low-Power, 9A (per amp) Shutdown Mode (MAX4331/MAX4333) No Phase Reversal for Overdriven Inputs Capable of Driving 2k Loads Unity-Gain Stable Ordering Information PART TEMP. RANGE PINPACKAGE SOT TOP MARK MAX4330EUK-T MAX4331ESA MAX4331EUA MAX4332ESA MAX4333ESD MAX4333EUB MAX4334ESD -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C 5 SOT23-5 8 SO 8 MAX 8 SO 14 SO 10 MAX 14 SO ABAJ -- -- -- -- -- -- Selector Guide PART NO. OF AMPS SHUTDOWN PIN-PACKAGE PER PACKAGE MODE MAX4330 1 -- MAX4331 1 Yes MAX4332 2 -- MAX4333 2 Yes MAX4334 4 -- Pin Configurations TOP VIEW 5-pin SOT23 8-pin SO/MAX 8-pin SO 10-pin MAX, 14-pin SO OUT 1 VEE 2 5 VCC 4 IN- MAX4330 14-pin SO IN+ 3 SOT23-5 Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. MAX4330-MAX4334 General Description The MAX4330-MAX4334 single/dual/quad op amps combine a wide 3MHz bandwidth, low-power operation, and excellent DC accuracy with Rail-to-Rail inputs and outputs. These devices require only 245A per amplifier, and operate from either a single +2.3V to +6.5V supply or dual 1.15V to 3.25V supplies. The input commonmode voltage range extends 250mV beyond VEE and VCC, and the outputs swing rail-to-rail. The MAX4331/ MAX4333 feature a shutdown mode in which the output goes high impedance and the supply current decreases to 9A per amplifier. Low-power operation combined with rail-to-rail input common-mode range and output swing makes these amplifiers ideal for portable/battery-powered equipment and other low-voltage, single-supply applications. Although the minimum operating voltage is specified at 2.3V, these devices typically operate down to 2.0V. Low offset voltage and high speed make these amplifiers excellent choices for signal-conditioning stages in precision, low-voltage data-acquisition systems. The MAX4330 is available in the space-saving 5-pin SOT23 package, and the MAX4331/MAX4333 are offered in a MAX package. MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC to VEE .....................................................7V IN_+, IN_-, SHDN Voltage................(VEE - 0.3V) to (VCC + 0.3V) Output Short-Circuit Duration.................................... Continuous (short to either supply) Continuous Power Dissipation (TA = +70C) 5-Pin SOT23 (derate 7.1mW/C above +70C).............571mW 8-Pin SO (derate 5.88mW/C above +70C).................471mW 8-Pin MAX (derate 4.10mW/C above +70C) ............330mW 10-Pin MAX (derate 5.60mW/C above +70C) ..........444mW 14-Pin SO (derate 8.33mW/C above +70C)...............667mW Operating Temperature Ranges MAX433_C/D .......................................................0C to +70C MAX433_E_ _....................................................-40C to +85C Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+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 = +2.3V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL tied to (VCC / 2), V S HDN 2V, TA = +25C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Bias Current Input Offset Current Differential Input Resistance Common-Mode Input Voltage Range SYMBOL VOS CONDITIONS VCM = VEE to VCC TYP MAX MAX433_EUA/EUB 0.65 1.5 MAX4330EUK 0.65 1.5 MAX4331ESA 0.25 0.6 MAX4332ESA/MAX4333ESD 0.25 0.9 MAX4334ESD 0.25 1.0 Output Resistance Off-Leakage Current in Shutdown 2 mV IB VEE < VCM < VCC 25 65 VEE < VCM < VCC 1 12 | VIN+ - VIN- | < 1.4V | VIN+ - VIN- | > 2.5V 2.3 M 2 k RIN(DIFF) -0.25 VCM CMRR -0.25V < VCM < (VCC + 0.25V) VCC = 2.3V Power-Supply Rejection Ratio UNITS IOS VCC = 5V Common-Mode Rejection Ratio MIN PSSR ROUT IOUT(SHDN) VCC = 2.3V to 6.5V VCC + 0.25 MAX433_EUA/EUB 68 88 MAX4330EUK 67 87 MAX4331ESA 74 93 MAX4332ESA/ MAX4333ESD 71 93 MAX4334ESD 69 92 MAX433_EUA/EUB 65 84 MAX4330EUK 64 82 MAX4331ESA 71 90 MAX4332ESA/ MAX4333ESD 69 90 MAX4334ESD 66 89 MAX433_EUA/EUB 76 88 MAX4330EUK 76 88 MAX4331ESA 79 92 MAX4332ESA/ MAX4333ESD 77 90 MAX4334ESD 75 90 AV = 1 V S HDN < 0.8V, VOUT = 0V to VCC _______________________________________________________________________________________ nA V dB dB dB 0.1 0.1 nA 2 A Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown (VCC = +2.3V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL tied to (VCC / 2), V S HDN 2V, TA = +25C, unless otherwise noted.) PARAMETER Large-Signal Voltage Gain Output Voltage Swing SYMBOL AVOL VOUT Output Short-Circuit Current ISC SHDN Logic Threshold (Note 1) VIL VIH SHDN Input Current CONDITIONS MIN TYP VOUT = 0.2V to 2.1V, RL = 100k VCC = 2.3V VOUT = 0.35V to 1.95V, RL = 2k VOUT = 0.2V to 4.8V, RL = 100k VCC = 5V VOUT = 0.35V to 4.65V, RL = 2k VCC - VOH RL = 100k VOL VCC - VOH RL = 2k VOL 93 78 93 83 112 90 120 95 8 8 100 70 VCC Quiescent Supply Current per Amplifier ICC Shutdown Supply Current per Amplifier ICC(SHDN) UNITS dB 30 30 175 150 20 Low (shutdown mode) High (normal mode) 0.8 2.3 VCC = 5V VCC = 2.3V VCC = 5V VCC = 2.3V VCM = VOUT = VCC / 2 V S HDN < 0.8V 275 245 17 9 mA mV mA 2.0 VEE < V S HDN < VCC Operating Supply-Voltage Range MAX V 2 A 6.5 V 325 290 25 14 A A DC ELECTRICAL CHARACTERISTICS (VCC = +2.3V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL tied to (VCC / 2), V S HDN 2V, TA = -40C to +85C, unless otherwise noted.) PARAMETER Input Offset Voltage SYMBOL VOS CONDITIONS VCM = VEE to VCC MIN TYP MAX433_EUA MAX433_EUK/EUB MAX4331ESA MAX4332ESA/MAX4333ESD 3.2 3.8 0.7 1 MAX4334ESD Offset-Voltage Tempco Input Bias Current Input Offset Current Power-Supply Rejection Ratio UNITS mV 1 VOS/T 3 V/C IB VEE < VCM < VCC 115 nA IOS VEE < VCM < VCC 15 nA PSRR VCC = 2.3V to 6.5V MAX433_EUA MAX433_EUK/EUB MAX4331ESA 72 71 76 MAX4332ESA/ MAX4333ESD 73 MAX4334ESD Common-Mode Input Voltage Range MAX VCM dB 71 -0.15 VCC + 0.15 V _______________________________________________________________________________________ 3 MAX4330-MAX4334 DC ELECTRICAL CHARACTERISTICS (continued) MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown DC ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.3V to +6.5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL tied to (VCC / 2), V S HDN 2V, TA = -40C to +85C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS VCC = 5V Common-Mode Rejection Ratio CMRR -0.25V < VCM < (VCC + 0.25V) VCC = 2.3V Off-Leakage Current in Shutdown IOUT(SHDN) AVOL VCC = 5V RL = 100k Output Voltage Swing VOUT RL = 2k SHDN Logic Threshold (Note 1) 63 MAX4330EUK 62 MAX4331ESA 72 MAX4332ESA/ MAX4333ESD 69 MAX4334ESD 67 MAX433_EUA/EUB 58 MAX4330EUK 57 MAX4331ESA 68 MAX4332ESA/ MAX4333ESD 66 MAX4334ESD 65 90 VOUT = 0.35V to 1.95V, RL = 2k 70 VOUT = 0.2V to 4.8V, RL = 100k 90 VOUT = 0.35V to 4.65V, RL = 2k 74 40 40 VCC - VOH 200 VOL 180 VIH High (normal mode) 0.8 2.0 VEE < V S HDN < VCC VCC TA = -40C to +85C Quiescent Supply Current per Amplifier ICC VCM = VOUT = VCC / 2 Shutdown Supply Current per Amplifier ICC(SHDN) V S HDN < 0.8V 2.3 V A 6.5 V 350 VCC = 2.3V 330 VCC = 5V 30 VCC = 2.3V 17 _______________________________________________________________________________________ mV 2 VCC = 5V Note 1: SHDN logic thresholds are referenced to VEE. Note 2: The MAX4330EUK is 100% tested at TA = +25C. All temperature limits are guaranteed by design. A dB VOL Low (shutdown mode) UNITS dB VCC - VOH Operating Supply-Voltage Range 4 MAX 5 VOUT = 0.2V to 2.1V, RL = 100k VIL SHDN Input Current MAX433_EUA/EUB TYP V SHDN < 0.8V, VOUT = 0V to VCC VCC = 2.3V Large-Signal Voltage Gain MIN A A Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown MAX4330-MAX4334 AC ELECTRICAL CHARACTERISTICS (VCC = +5V, VEE = 0V, VCM = 0V, VOUT = (VCC / 2), RL = 10k to (VCC / 2), V S HDN 2V, CL = 15pF, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL Gain-Bandwidth Product GBWP Full-Power Bandwidth FPBW CONDITIONS MIN TYP VOUT = 4Vp-p MAX UNITS 3 MHz 190 kHz Slew Rate SR 1.5 V/s Phase Margin PM 55 degrees 10 dB 0.012 % Gain Margin GM Total Harmonic Distortion THD Settling Time to 0.01% f = 10kHz, VOUT = 2Vp-p, AVCL = +1V/V tS Input Capacitance AV = +1V/V, 2V step CIN 4 s 3 pF Input Noise Voltage Density VNOISE f = 10kHz 28 nV/Hz Input Current Noise Density INOISE f = 10kHz 0.26 pA/Hz f = 10kHz, MAX4332/MAX4333/MAX4334 -124 dB AV = 1, no sustained oscillations Crosstalk Capacitive Load Stability Shutdown Time Enable Time from Shutdown Power-Up Time 150 pF t S HDN 0.8 s tENABLE 1 s tON 5 s __________________________________________Typical Operating Characteristics (VCC = +5V, VEE = 0V, VCM = VCC / 2, V S HDN > 2V, TA = +25C, unless otherwise noted.) 40 45 20 0 -45 PHASE 10 GAIN (dB) GAIN PHASE (DEGREES) GAIN (dB) 135 30 72 GAIN 20 36 0 0 -36 PHASE -20 1k 10k 100k 1M FREQUENCY (Hz) 10M -180 100M AV = +1 -20 -40 -60 -72 -108 -135 -10 0 180 144 108 -90 0 -20 100 AV = +1000 90 40 MAX4330/34-TOC02 60 MAX4330/34-TOC03 50 180 PSRR (dB) AV = +1000 PHASE (DEGREES) MAX4330/34-TOC01 60 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY GAIN AND PHASE vs. FREQUENCY (CL = 150pF) GAIN AND PHASE vs. FREQUENCY (NO LOAD) -80 -144 -40 100 1k 10k 100k 1M FREQUENCY (Hz) 10M -180 100M -100 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) _______________________________________________________________________________________ 5 ____________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC / 2, V S HDN > 2V, TA = +25C, unless otherwise noted.) 100 330 310 ICC (A) 1 SHDN = 0V 270 250 VCC = 2.3V 230 15 VCC = 2.3V 210 0.1 VCC = 6.5V 20 VCC = 6.5V 290 10 25 ICC (A) AV = +1 MAX4330/34-TOC05 350 MAX4330/34-TOC04 1k OUTPUT IMPEDANCE () SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE MAX4330/34-TOC06 OUTPUT IMPEDANCE vs. FREQUENCY 10 190 170 150 10k 100k 1M FREQUENCY (Hz) 10M 100M 5 -60 OUTPUT LEAKAGE CURRENT vs. TEMPERATURE MAX4330/34-TOC07 1000 800 600 400 OUT SHORT TO VCC 200 VCC = 2.3V TO 6.5V 20 40 60 80 100 -60 -40 -20 1000 30 500 0 -500 60 80 100 30 VCC = 2.7V, VCM = VCC 0 VCC = 2.3V, VCM = VEE -10 80 0 -10 0 100 VCC = 6.5V, RL = 2k 150 VCC = 2.3V, RL = 2k 100 50 VCC = 6.5V, VCM = VEE -40 -40 -20 0 20 60 TEMPERATURE (C) 80 100 5 6 7 RL TO VCC VCC = 6.5V RL = 2k 80 VCC = 2.3V RL = 2k 60 40 VCC = 6.5V RL = 100k VCC = 2.3V RL = 100k 0 0 40 4 100 20 VCC = 6.5V, RL = 100k -30 3 120 VCC = 2.3V, RL = 100k -20 2 OUTPUT SWING LOW vs. TEMPERATURE RL TO VEE 200 1 COMMON-MODE VOLTAGE (V) 250 VCC - VOUT (mV) 20 10 0 20 40 60 TEMPERATURE (C) OUTPUT SWING HIGH vs. TEMPERATURE MAX4330-34 TOC8a 40 10 -30 -60 -40 -20 INPUT BIAS CURRENT vs. TEMPERATURE VCC = 6.5V, VCM = VCC VCC = 6.5V VCC = 2.3V 20 -20 TEMPERATURE (C) 50 100 SO PACKAGE VOUT - VEE (mV) 40 80 40 MAX4330/34-TOC09 20 60 INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE -1500 0 40 INPUT OFFSET VOLTAGE vs. TEMPERATURE -1000 -60 -40 -20 20 TEMPERATURE (C) SOT/MAX PACKAGES -200 0 TEMPERATURE (C) 1500 0 6 0 INPUT BIAS CURRENT (nA) AV = OPEN LOOP SHDN = 0V OUT SHORT VCC = 6.5V TO VEE VCC = 2.3V INPUT OFFSET VOLTAGE (V) OUTPUT LEAKAGE CURRENT (pA) 1200 -40 -20 MAX4330-34/TOC08 1k MAX4330/34-TOC07a 100 MAX4330/34-TOC12 0.01 INPUT BIAS CURRENT (nA) MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown -60 -40 -20 0 20 40 60 TEMPERATURE (C) 80 100 -60 -40 -20 0 20 40 TEMPERATURE (C) _______________________________________________________________________________________ 60 80 100 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown (VCC = +5V, VEE = 0V, VCM = VCC / 2, V S HDN > 2V, TA = +25C, unless otherwise noted.) 113 -90 103 106 VCM = -0.25V TO +5.25V 88 -130 83 -140 78 80 100 RL = 2k RL = 100k 86 0.3 0.4 0.5 115 VOUT(p-p) = VCC - 1V 110 0.4 GAIN (dB) 110 RL = 2k RL TO VCC 100 VCC = 2.3V RL TO VEE 95 90 RL TO VCC 0.5 0.6 85 0 0.1 0.2 0.3 0.4 0.5 OUTPUT VOLTAGE: EITHER SUPPLY (V) OUTPUT VOLTAGE: EITHER SUPPLY (V) LARGE-SIGNAL GAIN vs. TEMPERATURE (RL = 100k) MINIMUM OPERATING VOLTAGE vs. TEMPERATURE 125 2.00 1.95 VCC (V) 1.80 1.75 VCC = 2.3V RL TO VCC OR VEE 0 20 40 60 TEMPERATURE (C) 80 100 TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY 1.85 120 -60 -40 -20 1 THD + NOISE (%) 1.90 VCC = 6.5V RL TO VCC 0.6 MAX4330/34-TOC18 VOUT(p-p) = VCC - 1V MAX4330/34-TOC17 VCC = 6.5V RL TO VEE RL TO VEE VCC = 6.5V 105 RL = 10k 115 0.6 MAX4330/34-TOC19 0.3 0.5 LARGE-SIGNAL GAIN vs. TEMPERATURE (RL = 2k) 90 0.2 0.4 100 80 0.1 0.3 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (VCC = 6.5V, RL TO VEE) 95 0 0.2 OUTPUT VOLTAGE: EITHER SUPPLY (V) 105 RL = 2k 0.1 OUTPUT VOLTAGE: EITHER SUPPLY (V) RL = 100k 90 115 0 0.6 125 GAIN (dB) GAIN (dB) 0.2 120 RL = 10k 100 130 0.1 130 120 110 94 90 0 MAX4330/34-TOC16 130 RL = 2k 98 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (VCC = 6.5V, RL TO VCC) 140 RL = 10k 102 93 -120 0 20 40 60 TEMPERATURE (C) RL = 10k 98 MAX4330/34-TOC15 -110 GAIN (dB) 110 GAIN (dB) 108 -100 RL = 100k 114 -80 -60 -40 -20 GAIN (dB) 118 MAX4330/34-TOC10 RL = 100k MAX4330/34-TOC14 -70 MAX4330/34-TOC13 118 MAX4330/34-TOC11 COMMON-MODE REJECTION (dB) -60 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (VCC = 2.3V, RL TO VEE) LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE (VCC = 2.3V, RL TO VCC) COMMON-MODE REJECTION vs. TEMPERATURE AV = +1 2Vp-p SIGNAL 500kHz LOWPASS FILTER RL = 10k TO VCC / 2 0.1 0.01 1.70 1.65 110 1.60 -60 -40 -20 0 20 40 TEMPERATURE (C) 60 80 100 0.001 -60 -40 -20 0 20 40 TEMPERATURE (C) 60 80 100 1 10 100 1k 10k 100k FREQUENCY (Hz) _______________________________________________________________________________________ 7 MAX4330-MAX4334 ____________________________Typical Operating Characteristics (continued) ____________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC / 2, V S HDN > 2V, TA = +25C, unless otherwise noted.) TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK SIGNAL AMPLITUDE CROSSTALK vs. FREQUENCY 0.1 RL = 2k RL = 10k 0.01 120 110 100 RL = 100k 80 4.0 4.2 4.4 4.6 4.8 4 RL TO VEE VOUT = VCC / 2 0 1 5.0 UNSTABLE REGION 6 2 90 0.001 MAX4330/34-TOC21 8 LOAD RESISTANCE (k) 130 CROSSTALK (dB) AV = +1 1kHz SINE WAVE 500kHz LOWPASS FILTER RL TO VCC / 2 CAPACITIVE LOAD STABILITY 10 MAX4330/34-TOC22 140 MAX4330/34-TOC20 1 THD + NOISE (%) 10 100 1000 10000 FREQUENCY (kHz) PEAK-TO-PEAK SIGNAL AMPLITUDE (V) 0 200 600 400 800 LOAD CAPACITANCE (pF) SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) MAX4330/34-TOC23 MAX4330/34-TOC22 AV = -1 AV = +1 IN VOLTAGE (50mV/div) VOLTAGE (50mV/div) IN OUT OUT TIME (200ns/div) TIME (200ns/div) LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX4330/34-TOC25 MAX4330/34-TOC24 IN VOLTAGE (2V/div) IN VOLTAGE (2V/div) MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown OUT OUT TIME (5s/div) 8 TIME (5s/div) _______________________________________________________________________________________ 1000 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown PIN MAX4333 10-Pin 14-Pin SO MAX -- -- MAX4330 MAX4331 MAX4332 1 6 -- 2 4 4 4 3 3 -- 4 2 5 MAX4334 NAME FUNCTION -- OUT Output 4 11 VEE Negative Supply. Ground for singlesupply operation. -- -- -- IN+ Noninverting Input -- -- -- -- IN- Inverting Input 7 8 10 14 4 VCC Positive Supply -- 1, 5 -- -- 5, 7, 8, 10 -- N.C. No Connection. Not internally connected. -- -- 1, 7 1, 9 1, 13 1, 7 OUT1, OUT2 Outputs for Amplifiers 1 and 2 -- -- 3, 5 3, 7 3, 11 3, 5 IN1+, IN2+ Noninverting Inputs to Amplifiers 1 and 2 -- -- 2, 6 2, 8 2, 12 2, 6 IN1-, IN2- Inverting Inputs to Amplifiers 1 and 2 -- 8 -- -- -- -- SHDN Shutdown Input for Amplifier. Drive low for shutdown mode. Drive high or connect to VCC for normal operation. Shutdown for Amplifiers 1 and 2. Drive low for shutdown mode. Drive high or connect to VCC for normal operation. -- -- -- 5, 6 6, 9 -- SHDN1, SHDN2 -- -- -- -- -- 8, 14 OUT3, OUT4 Outputs for Amplifiers 3 and 4 -- -- -- -- -- 9, 13 IN3-, IN4- Inverting Inputs for Amplifiers 3 and 4 -- -- -- -- -- 10, 12 IN3+, IN4+ Noninverting Inputs for Amplifiers 3 and 4 _______________________________________________________________________________________ 9 MAX4330-MAX4334 Pin Description MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown _______________Detailed Description Rail-to-Rail Input Stage The MAX4330-MAX4334 have rail-to-rail input and output stages that are specifically designed for lowvoltage, single-supply operation. The input stage consists of separate NPN and PNP differential stages, which operate together to provide a common-mode range extending to 0.25V beyond both supply rails. The crossover region, which occurs halfway between VCC and VEE, is extended to minimize degradation in CMRR caused by mismatched input pairs. The input offset voltage is typically 250V. Low offset voltage, high bandwidth, rail-to-rail common-mode input range, and rail-to-rail outputs make this family of op amps an excellent choice for precision, low-voltage data-acquisition systems. Since the input stage consists of NPN and PNP pairs, the input bias current changes polarity as the input voltage passes through the crossover region. Match the effective impedance seen by each input to reduce the offset error due to input bias currents flowing through external source impedances (Figures 1a and 1b). The combination of high source impedance with input capacitance (amplifier input capacitance plus stray capacitance) creates a parasitic pole that produces an underdamped signal response. Reducing input capacitance or placing a small capacitor across the feedback resistor improves response. The MAX4330-MAX4334's inputs are protected from large differential input voltages by internal 1k series resistors and back-to-back triple diode stacks across the inputs (Figure 2). For differential input voltages (much less than 1.8V), input resistance is typically 2.3M. For differential input voltages greater than 1.8V, input resistance is around 2k, and the input bias current can be approximated by the following equation: IBIAS = (VDIFF - 1.8V) / 2k In the region where the differential input voltage approaches 1.8V, input resistance decreases exponentially from 2.3M to 2k as the diode block begins conducting. Inversely, the bias current increases with the same curve. 10 MAX4330 MAX4331 MAX4332 MAX4333 MAX4334 R3 R3 = R1 R2 R1 R2 Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting) MAX4330 MAX4331 MAX4332 MAX4333 MAX4334 R3 R3 = R1 R2 R1 R2 Figure 1b. Reducing Offset Error Due to Bias Current (Inverting) ______________________________________________________________________________________ Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown MAX4330-MAX4334 1k 1k Figure 2. Input Protection Circuit RISO = 0, AV = +1 CL = 510pF IN 1V/div OUT 1V/div 20s/div VCC = 3V, RL = 2k TO VCC / 2 Figure 3. Rail-to-Rail Input/Output Voltage Range Rail-to-Rail Output Stage The MAX4330-MAX4334 output stage can drive up to a 2k load and still typically swing within 125mV of the rails. Figure 3 shows the output voltage swing of a MAX4331 configured as a unity-gain buffer. The operating voltage is a single +3V supply, and the input voltage is 3Vp-p. The output swings to within 70mV of VEE and 100mV of V CC , even with the maximum load applied (2k to mid-supply). IN 50mV/div OUT 50mV/div 2s/div VCC = 3V, RL = 100k Figure 4. Small-Signal Transient Response with Excessive Capacitive Load Driving a capacitive load can cause instability in many op amps, especially those with low quiescent current. The MAX4330-MAX4334 are stable for capacitive loads up to 150pF. The Capacitive Load Stability graph in the Typical Operating Characteristics gives the stable operating region for capacitive vs. resistive loads. Figures 4 and 5 show the response of the MAX4331 with an excessive capacitive load, compared with the response when a series resistor is added between the output and the capacitive load. The resistor improves the circuit's response by isolating the load capacitance from the op amp's output (Figure 6). ______________________________________________________________________________________ 11 MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown AV = +1, CL = 510pF RISO = 39 50mV/div IN RISO 50mV/div OUT CL MAX4330 MAX4331 MAX4332 MAX4333 MAX4334 2s/div Figure 5. Small-Signal Transient Response with Excessive Capacitive Load and Isolation Resistor MAX4330 MAX4331 MAX4332 MAX4333 MAX4334 VCC 0V TO +2.7V STEP FOR POWER-UP TEST, +2.7V STEP FOR SHUTDOWN- 2k ENABLE TEST 0V TO +2.7V STEP FOR SHUTDOWN TEST 1V/div OUT 500mV/div 10k 100 SUPPLY-CURRENT MONITORING POINT 5s/div Figure 8. Power-Up/Down Output Voltage Figure 7. Power-Up/Shutdown Test Circuit __________Applications Information Power-Up The MAX4330-MAX4334 outputs typically settle within 5s after power-up. Using the test circuit of Figure 7, Figures 8 and 9 show the output voltage and supply current on power-up and power-down. 12 VCC VOUT SHDN 2k Figure 6. Capacitive-Load-Driving Circuit Shutdown Mode The MAX4331/MAX4333 feature a low-power shutdown mode. When the shutdown pin (SHDN) is pulled low, the supply current drops to 9A per amplifier (typical), the amplifier is disabled, and the outputs enter a highimpedance state. Pulling SHDN high or leaving it floating enables the amplifier. Figures 10 and 11 show the MAX4331/MAX4333's output voltage and supply-current responses to a shutdown pulse. ______________________________________________________________________________________ Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown 1V/div ICC 100A/div Figure 9. Power-Up/Down Supply Current Do not three-state SHDN. Due to the output leakage currents of three-state devices and the small internal pull-up current for SHDN, three-stating this pin could result in indeterminate logic levels, and could adversely affect op-amp operation. 1V/div SHDN 500mV/div OUT 5s/div MAX4330-MAX4334 VCC 5s/div Figure 10. Shutdown Output Voltage Enable/Disable 1V/div SHDN The logic threshold for SHDN is always referred to VEE, not GND. When using dual supplies, pull SHDN to VEE to place the op amp in shutdown mode. Power Supplies and Layout The MAX4330-MAX4334 operate from a single +2.3V to +6.5V power supply, or from dual 1.15V to 3.25V supplies. For single-supply operation, bypass the power supply with a 0.1F capacitor to ground (VEE). For dual supplies, bypass both VCC and VEE with their own set of capacitors to ground. Good layout technique helps optimize performance by decreasing the amount of stray capacitance at the op amp's inputs and outputs. To decrease stray capacitance, minimize trace lengths by placing external components close to the op amp's pins. 100A/div ICC 5s/div Figure 11. Shutdown Enable/Disable Supply Current ______________________________________________________________________________________ 13 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown MAX4330-MAX4334 Pin Configurations (continued) TOP VIEW N.C. 1 IN- 2 OUT1 1 VCC IN1- 2 8 SHDN 7 MAX4331 8 VCC 7 OUT2 MAX4332 IN+ 3 6 OUT IN1+ 3 6 IN2- VEE 4 5 N.C. VEE 4 5 IN2+ SO/MAX SO OUT1 1 IN1- 2 IN1+ 3 VEE SHDN1 10 VCC 9 OUT2 8 IN2- 4 7 IN2+ 5 6 SHDN2 MAX4333 MAX OUT1 1 14 VCC OUT1 1 14 OUT4 IN1- 2 13 OUT2 IN1- 2 13 IN4- IN1+ 3 12 IN2- IN1+ 3 VEE 4 11 IN2+ VCC 4 N.C. 5 10 N.C. IN2+ 5 SHDN1 6 9 SHDN2 IN2- 6 9 IN3- N.C. 7 8 N.C. OUT2 7 8 OUT3 MAX4333 SO 14 12 IN4+ MAX4334 11 VEE 10 IN3+ SO ______________________________________________________________________________________ Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown MAX4330/MAX4331 TRANSISTOR COUNT: 199 SUBSTRATE CONNECTED TO VEE MAX4332/MAX4333 TRANSISTOR COUNT: 398 SUBSTRATE CONNECTED TO VEE MAX4334 TRANSISTOR COUNT: 796 SUBSTRATE CONNECTED TO VEE Tape-and-Reel Information D P0 W P2 B0 t D1 F P NOTE: DIMENSIONS ARE IN MM. AND FOLLOW EIA481-1 STANDARD. K0 A0 3.988 0.102 40.005 0.203 P2 2.007 0.051 t 0.254 0.127 W 8.001 +0.305 -0.102 A0 3.200 0.102 E 1.753 0.102 P0 B0 3.099 0.102 F 3.505 0.051 P010 D 1.499 +0.102 +0.000 K0 1.397 0.102 3.988 0.102 0.991 +0.254 +0.000 P D1 ______________________________________________________________________________________ 5 SOT23-5 E 15 MAX4330-MAX4334 Chip Information SOT5L.EPS ________________________________________________________Package Information 8LUMAXD.EPS MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.