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| 19-2772; Rev 3a; 1/98 High-Precision, Low-Voltage, Micropower Op Amp General Description The MAX480 is a precision micropower operational amplifier with flexible power-supply capability. Its guaranteed 140V maximum offset voltage (25V typ) is the lowest of any micropower op amp. Similarly, input bias current, input offset current, and drift specifications are within tight limits. Both the input and output voltage ranges include the negative supply rail, allowing maximum signal range capability in single-supply applications. The MAX480 operates with either a single supply ranging from +1.6V to +36V or dual supplies from 0.8V to 18V. The MAX480 consumes less than 20A, allowing operation in excess of 10,000 hours from a 250mA-hr lithium coin cell. Even with a minimal quiescent current, the amplifier sinks or sources 5mA from its output. The MAX480 is available in 8-pin DIP and SO packages in commercial, extended, and military temperature ranges. PART Features o Single- or Dual-Supply Operation: +1.6V to +36V, 0.8V to 18V o True Single-Supply Operation: Input and Output Voltage Ranges Include Ground o 2.0V/C Max Offset Voltage Drift o 20A Max Supply Current o 5mA Min Output Drive o 140V Max Input Offset Voltage o 3nA Max Input Bias Current o 500V/mV Min Open-Loop Gain o Standard 741 Pinout with Nulling to V- MAX480 Ordering Information TEMP. RANGE 0C to +70C 0C to +70C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 CERDIP MAX480CPA MAX480CSA MAX480EPA MAX480ESA MAX480MJA Applications Precision Micropower Amplifiers Micropower Signal Processing Battery-Powered Analog Circuits Typical Operating Circuit V+ (5V) Pin Configuration TOP VIEW R2 10k R1 10k VIN HP5082-2800 2 7 IN914 6 NULL 1 OUT IN- 2 8 7 N.C. V+ OUT NULL 3 MAX480 4 R3 100k MAX480 IN+ 3 6 5 V- 4 DIP/SO SINGLE OP AMP FULL-WAVE RECTIFIER ________________________________________________________________ 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. High-Precision, Low-Voltage, Micropower Op Amp MAX480 ABSOLUTE MAXIMUM RATINGS Supply Voltage (V+ to V-) ....................................................18V Differential Input Voltage ........................(V- - 20V) to (V+ + 20V) Common-Mode Input Voltage ................(V- - 20V) to (V+ + 20V) Output Short-Circuit Duration ........................................Indefinite Continuous Power Dissipation Plastic DIP (derate 9.09mW/C above +70C) .............727mW SO (derate 5.88mW/C above +70C) ..............................471mW CERDIP (derate 8.0mW/C above +70C) ....................640mW Operating Temperature Ranges MAX480C_A.........................................................0C to +70C MAX480E_A ......................................................-40C to +85C MAX480MJA ...................................................-55C to +125C Junction Temperature (TJ).................................-65C to +150C Storage Temperature Range .............................-65C to +150C 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. ELECTRICAL CHARACTERISTICS (VS = 1.5V to 15V, TA = +25C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Offset Current Input Bias Current SYMBOL VOS IOS IB VCM = 0 VCM = 0 VS = 15V, VO = 10V V+ = 5V, V- = 0, 1V < VO < 4V Input Voltage IVR VO Output Voltage Swing VOH VOL Common-Mode Rejection Ratio Power-Supply Rejection Ratio Slew Rate Supply Current Capacitive Load Stability Input Noise Voltage Differential-Mode Input Resistance Common-Mode Input Resistance enp-p RIN RINCM CMRR PSRR SR ISY VS = 15V VS = 1.5V VS = 15V AV = +1V/V, no oscillations (Note 2) fO = 0.1Hz to 10Hz, VS = 15V VS = 15V VS = 15V 250 5 V+ = 5V, V- = 0 VS = 15kV (Note 1) VS = 15V RL = 10k RL = 2k RL = 100k RL = 10k RL = 2k RL = 100k RL = 10k 500 200 75 100 50 0/4 -15/13.5 14 11 4.0 85 90 14.2 12 4.2 100 110 130 1.0 12 9 14 650 3 30 20 15 20 12 500 V dB V/V V/ms A pF Vp-p M G V CONDITIONS MIN TYP 25 0.2 1 1200 600 250 400 180 V V/mV MAX 140 1 3 UNITS V nA nA Large-Signal Voltage Gain AVO V+ = 5V, V- = 0, RL = 2k V+ = 5V, V- = 0, RL = 10k V+ = 5V, V- = 0, 0 < VCM < 4V VS = 15V, -15V < VCM < 13.5V 2 _______________________________________________________________________________________ High-Precision, Low-Voltage, Micropower Op Amp ELECTRICAL CHARACTERISTICS (VS = 1.5V to 15V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SYMBOL Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current VOS TCVOS IOS IB (Note 2) VCM = 0 VCM = 0 VS = 15V, V = 10V AVO V+ = 5V, V- = 0, 1V < VO < 4V IVR VO Output Voltage Swing VOH VOL V+ = 5V, V- = 0 VS = 15V (Note 1) VS = 15V V+ = 5V, V- = 0 RL = 2k V+ = 5V, V- = 0 RL = 10k V+ = 5V, V- = 0, 0 < VCM < 3.5V VS = 15V, -15V < VCM < 13.5V PSRR ISY VS = 1.5V VS = 15V 85 90 RL = 10k RL = 2k RL = 100k RL = 10k RL = 2k RL = 100k RL = 10k 350 130 55 50 30 0/3.5 -15/13.5 13.5 14 10.5 11.8 3.9 4.1 100 110 120 1.0 12 16 12 25 30 500 85 90 CONDITIONS MAX480C MIN TYP MAX 40 0.3 0.2 1 950 400 125 360 150 220 2.0 2.0 3 350 130 55 50 30 0/3.5 -15/13.5 13.5 14 10.5 11.8 3.9 4.1 100 110 120 1.0 13 17 12 25 30 500 80 85 MAX480E MIN TYP MAX 50 0.3 0.3 2 800 400 150 280 140 250 2.0 2.0 5 60 45 30 35 22 0/3.5 -15/13.5 13.5 13.7 10.5 11.5 3.9 4.1 100 105 dB 115 3.2 15 19 15 25 30 V/V A 500 V V MAX480M MIN TYP MAX 70 0.3 0.5 3 400 240 110 200 110 V V/mV 300 2.0 2.0 7 UNITS V V/C nA nA MAX480 Large-Signal Voltage Gain Input Voltage Range Common-Mode Rejection Ratio CMRR Power-Supply Rejection Ratio Supply Current Note 1: Guaranteed by CMRR test. Note 2: Guaranteed by design. _______________________________________________________________________________________ 3 High-Precision, Low-Voltage, Micropower Op Amp MAX480 Typical Operating Characteristics (TA = +25C, unless otherwise noted.) INPUT OFFSET VOLTAGE vs. TEMPERATURE MAX480-01 INPUT OFFSET CURRENT vs. TEMPERATURE MAX480-02 INPUT BIAS CURRENT vs. TEMPERATURE VS = 15V 1.0 INPUT BIAS CURRENT (nA) 0.8 0.6 0.4 0.2 0 MAX480-03 100 VS = 15V INPUT OFFSET VOLTAGE (V) 80 1.4 VS = 15V 1.2 INPUT OFFSET CURRENT (nA) 1.0 0.8 0.6 0.4 0.2 0 1.2 60 40 20 0 -75 -50 -25 0 25 50 75 100 125 TEMPERATURE (C) -75 -50 -25 0 25 50 75 100 125 -75 -50 -25 0 25 50 75 100 125 TEMPERATURE (C) TEMPERATURE (C) SUPPLY CURRENT vs. TEMPERATURE 20 18 SUPPLY CURRENT (A) 16 14 12 10 8 6 4 2 -75 -50 -25 0 25 50 75 100 125 TEMPERATURE (C) 0 0 VS = 1.5V VS = 15V NO LOAD MAX480-04 OPEN-LOOP GAIN vs. SINGLE-SUPPLY VOLTAGE MAX480-05 OPEN-LOOP GAIN AND PHASE SHIFT vs. FREQUENCY VS = 15V RL = 100k MAX480-06 22 600 RL = 10k 500 OPEN-LOOP GAIN (V/mV) 400 300 200 100 TA = +25C TA = +85C 140 120 OPEN-LOOP GAIN (dB) 100 80 60 40 20 0 GAIN PHASE 0 45 90 135 180 TA = +125C 5 10 15 20 25 30 0.1 1 10 100 1k 10k 100k SINGLE-SUPPLY VOLTAGE (V) FREQUENCY (Hz) CLOSED-LOOP GAIN vs. FREQUENCY MAX480-07 OUTPUT VOLTAGE SWING vs. LOAD RESISTANCE MAX480-08 OUTPUT VOLTAGE SWING vs. LOAD RESISTANCE POSITIVE SUPPLY 14 OUTPUT VOLTAGE SWING (V) 12 10 8 6 4 2 VS = 15V 0 NEGATIVE SUPPLY MAX480-09 60 VS = 15V CLOSED-LOOP GAIN (dB) 40 6 5 4 3 2 1 V+ = 5V V- = 0 16 20 0 OUTPUT VOLTAGE SWING (V) -20 10 100 1k FREQUENCY (Hz) 10k 100k 0 100 1k 10k 100k LOAD RESISTANCE () 100 1k 10k 100k LOAD RESISTANCE () 4 _______________________________________________________________________________________ PHASE SHIFT (DEGREES) High-Precision, Low-Voltage, Micropower Op Amp Typical Operating Characteristics (continued) (TA = +25C, unless otherwise noted.) MAX480 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX480-10 COMMON-MODE REJECTION RATIO vs. FREQUENCY MAX480-11 NOISE VOLTAGE DENSITY vs. FREQUENCY VS = 15V NOISE VOLTAGE DENSITY (nV/Hz) MAX480-12 120 POWER-SUPPLY REJECTION (dB) 140 VS = 15V COMMON-MODE REJECTION (dB) 120 1000 100 NEGATIVE SUPPLY 100 80 POSITIVE SUPPLY 60 100 80 10 40 60 20 1 10 100 1k FREQUENCY (Hz) 40 1 10 100 1k FREQUENCY (Hz) 1 0.1 1 10 FREQUENCY (Hz) 100 1k CURRENT NOISE DENSITY vs. FREQUENCY MAX480-13 SMALL-SIGNAL TRANSIENT RESPONSE MAX480-14 LARGE-SIGNAL TRANSIENT RESPONSE MAX480-15 100 VS = 15V CURRENT NOISE DENSITY (pA/Hz) 10 1 0.1 0.1 1 10 FREQUENCY (Hz) 100 1k 100s/div VS = 15V, AV = +1, RL = 10k, CL = 500pF 1ms/div VS = 15V, AV = +1, RL = 10k, CL = 500pF _______________________________________________________________________________________ 5 High-Precision, Low-Voltage, Micropower Op Amp MAX480 V+ +15V IN2 7 6 IN+ 3 1 OUT 2 7 6 3 100k MAX480 5 4 MAX480 4 -15V V- Figure 1. Offset Nulling Circuit Figure 2. Burn-In Circuit Package Information SOICN.EPS 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. 6 _____________________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. |
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