19-2772; Rev 3a; 1/98 High-Precision, Low-Voltage, Micropower Op Amp Features The MAX480 is a precision micropower operational amplifier with flexible power-supply capability. Its guaranteed 140µV maximum offset voltage (25µV typ) is the lowest of any micropower op amp. Similarly, input bias current, input offset current, and drift specifications are within tight limits. ♦ Single- or Dual-Supply Operation: +1.6V to +36V, ±0.8V to ±18V 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 20µA, 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. ♦ 20µA Max Supply Current ♦ True Single-Supply Operation: Input and Output Voltage Ranges Include Ground ♦ 2.0µV/°C Max Offset Voltage Drift ♦ 5mA Min Output Drive ♦ 140µV Max Input Offset Voltage ♦ 3nA Max Input Bias Current ♦ 500V/mV Min Open-Loop Gain ♦ Standard 741 Pinout with Nulling to V- The MAX480 is available in 8-pin DIP and SO packages in commercial, extended, and military temperature ranges. Ordering Information PART Applications Precision Micropower Amplifiers Micropower Signal Processing Battery-Powered Analog Circuits MAX480CPA MAX480CSA MAX480EPA MAX480ESA MAX480MJA TEMP. RANGE PIN-PACKAGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 CERDIP Pin Configuration Typical Operating Circuit V+ (5V) TOP VIEW R2 10k R1 10k 2 VIN 7 NULL 1 IN914 6 HP5082-2800 3 OUT MAX480 4 8 N.C. 7 V+ 3 6 OUT V- 4 5 NULL IN- 2 MAX480 R3 100k IN+ 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. MAX480 General Description MAX480 High-Precision, Low-Voltage, Micropower Op Amp 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 +70°C) .............727mW SO (derate 5.88mW/°C above +70°C) ..............................471mW CERDIP (derate 8.0mW/°C above +70°C) ....................640mW Operating Temperature Ranges MAX480C_A.........................................................0°C to +70°C MAX480E_A ......................................................-40°C to +85°C MAX480MJA ...................................................-55°C to +125°C Junction Temperature (TJ).................................-65°C to +150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C 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 = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS Input Offset Voltage VOS Input Offset Current IOS VCM = 0 IB VCM = 0 Input Bias Current Large-Signal Voltage Gain AVO VS = ±15V, VO = ±10V V+ = 5V, V- = 0, 1V < VO < 4V Input Voltage IVR VO Output Voltage Swing PSRR SR Supply Current ISY Capacitive Load Stability Input Noise Voltage nA 1 3 nA 600 RL = 2kΩ 75 250 RL = 100kΩ 100 400 50 180 RL = 10kΩ VS = ±15kV (Note 1) V -15/13.5 RL = 10kΩ ±14 ±14.2 RL = 2kΩ ±11 ±12 4.0 V 4.2 100 V+ = 5V, V- = 0, 0 < VCM < 4V 85 110 VS = ±15V, -15V < VCM < 13.5V 90 130 VS = ±15V 5 1.0 500 µV dB 12 12 µV/V V/ms VS = ±1.5V 9 15 VS = ±15V 14 20 250 UNITS V/mV 0/4 AV = +1V/V, no oscillations (Note 2) µA 650 pF fO = 0.1Hz to 10Hz, VS = ±15V 3 µVp-p Differential-Mode Input Resistance RIN VS = ±15V 30 MΩ Common-Mode Input Resistance RINCM VS = ±15V 20 GΩ 2 enp-p 1 200 V+ = 5V, V- = 0, RL = 10kΩ Slew Rate µV 0.2 RL = 10kΩ V+ = 5V, V- = 0, RL = 2kΩ Power-Supply Rejection Ratio 140 1200 VOL CMRR MAX 25 500 VOH Common-Mode Rejection Ratio TYP RL = 100kΩ V+ = 5V, V- = 0 VS = ±15V MIN _______________________________________________________________________________________ High-Precision, Low-Voltage, Micropower Op Amp (VS = ±1.5V to ±15V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX480C MIN TYP MAX MAX480E MIN TYP MAX MAX480M MIN TYP MAX UNITS 40 220 50 250 70 300 µV Input Offset Voltage VOS Input Offset Voltage Drift TCVOS (Note 2) 0.3 2.0 0.3 2.0 0.3 2.0 µV/°C Input Offset Current IOS VCM = 0 0.2 2.0 0.3 2.0 0.5 2.0 nA IB VCM = 0 1 3 2 5 3 7 nA Input Bias Current Large-Signal Voltage Gain Input Voltage Range VS = ±15V, V = ±10V AVO V+ = 5V, V- = 0, 1V < VO < 4V IVR VO Output Voltage Swing Common-Mode Rejection Ratio VS = ±15V VOL V+ = 5V, V- = 0 RL = 10kΩ PSRR Supply Current ISY 950 350 800 60 400 130 400 130 400 45 240 RL = 2kΩ 55 125 55 150 30 110 RL = 100kΩ 50 360 50 280 35 200 30 150 30 140 22 110 RL = 10kΩ 0/3.5 VS = ±15V (Note 1) V+ = 5V, V- = 0 RL = 2kΩ Power-Supply Rejection Ratio 350 RL = 10kΩ V+ = 5V, V- = 0 VOH CMRR RL = 100kΩ 0/3.5 0/3.5 V -15/13.5 -15/13.5 -15/13.5 RL = 10kΩ ±13.5 ±14 ±13.5 ±14 ±13.5 ±13.7 RL = 2kΩ ±10.5 ±11.8 ±10.5 ±11.8 ±10.5 ±11.5 3.9 4.1 100 3.9 500 V/mV 4.1 100 3.9 500 V 4.1 100 V+ = 5V, V- = 0, 0 < VCM < 3.5V 85 110 85 110 80 105 VS = ±15V, -15V < VCM < 13.5V 90 120 90 120 85 115 500 µV dB 1.0 12 1.0 12 3.2 15 VS = ±1.5V 12 25 13 25 15 25 VS = ±15V 16 30 17 30 19 30 µV/V µA Note 1: Guaranteed by CMRR test. Note 2: Guaranteed by design. _______________________________________________________________________________________ 3 MAX480 ELECTRICAL CHARACTERISTICS Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) INPUT OFFSET CURRENT vs. TEMPERATURE 1.2 0.6 0.4 0.4 0 -25 0 25 50 75 0 25 50 75 -75 100 125 25 50 75 100 125 OPEN-LOOP GAIN AND PHASE SHIFT vs. FREQUENCY 600 MAX480-04 RL = 10kΩ 10 VS = ±1.5V TA = +25°C 500 OPEN-LOOP GAIN (V/mV) VS = ±15V 6 TA = +85°C 400 300 140 TA = +125°C 200 100 -25 0 25 50 75 0 100 125 0 100 GAIN 80 45 40 135 20 180 5 10 15 20 25 0.1 30 1 10 100 1k 10k TEMPERATURE (°C) SINGLE-SUPPLY VOLTAGE (V) FREQUENCY (Hz) CLOSED-LOOP GAIN vs. FREQUENCY OUTPUT VOLTAGE SWING vs. LOAD RESISTANCE OUTPUT VOLTAGE SWING vs. LOAD RESISTANCE 40 20 0 V+ = 5V V- = 0 5 4 3 2 1 100 1k FREQUENCY (Hz) 10k 100k POSITIVE SUPPLY 14 NEGATIVE SUPPLY 12 10 8 6 4 2 VS = ±15V 0 -20 100k 16 OUTPUT VOLTAGE SWING (V) OUTPUT VOLTAGE SWING (V) VS = ±15V MAX480-08 6 MAX480-07 60 90 PHASE 60 0 0 2 VS = ±15V RL = 100kΩ 120 4 10 0 OPEN-LOOP GAIN vs. SINGLE-SUPPLY VOLTAGE 14 -50 -25 SUPPLY CURRENT vs. TEMPERATURE 16 -75 -50 TEMPERATURE (°C) 18 8 -25 TEMPERATURE (°C) NO LOAD 12 -50 TEMPERATURE (°C) 22 20 0 -75 100 125 OPEN-LOOP GAIN (dB) -50 MAX480-05 -75 SUPPLY CURRENT (µA) 0.6 0.2 0.2 0 4 0.8 0 100 1k 10k LOAD RESISTANCE (Ω) 100k 100 1k 10k LOAD RESISTANCE (Ω) _______________________________________________________________________________________ 100k PHASE SHIFT (DEGREES) 20 0.8 MAX480-06 40 1.0 MAX480-09 60 VS = ±15V 1.0 INPUT BIAS CURRENT (nA) 80 1.2 MAX480-02 VS = ±15V INPUT OFFSET CURRENT (nA) VS = ±15V INPUT OFFSET VOLTAGE (µV) 1.4 MAX480-01 100 INPUT BIAS CURRENT vs. TEMPERATURE MAX480-03 INPUT OFFSET VOLTAGE vs. TEMPERATURE CLOSED-LOOP GAIN (dB) MAX480 High-Precision, Low-Voltage, Micropower Op Amp High-Precision, Low-Voltage, Micropower Op Amp NEGATIVE SUPPLY 80 POSITIVE SUPPLY 60 40 20 120 100 80 60 40 1 10 100 1k VS = ±15V 100 10 1 1 10 100 1k 0.1 1 10 100 CURRENT NOISE DENSITY vs. FREQUENCY SMALL-SIGNAL TRANSIENT RESPONSE LARGE-SIGNAL TRANSIENT RESPONSE 1k MAX480-14 MAX480-15 FREQUENCY (Hz) MAX480-13 FREQUENCY (Hz) VS = ±15V MAX480-12 1000 FREQUENCY (Hz) 100 CURRENT NOISE DENSITY (pA/√Hz) VS = ± 15V NOISE VOLTAGE DENSITY vs. FREQUENCY NOISE VOLTAGE DENSITY (nV/√Hz) MAX480-10 100 140 COMMON-MODE REJECTION (dB) POWER-SUPPLY REJECTION (dB) 120 COMMON-MODE REJECTION RATIO vs. FREQUENCY MAX480-11 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 10 1 0.1 0.1 1 10 FREQUENCY (Hz) 100 1k 100µs/div VS = ±15V, AV = +1, RL = 10kΩ, CL = 500pF 1ms/div VS = ±15V, AV = +1, RL = 10kΩ, CL = 500pF _______________________________________________________________________________________ 5 MAX480 Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) V+ +15V IN- 2 7 6 IN+ MAX480 3 2 OUT 7 4 5 1 6 3 MAX480 4 100k -15V V- Figure 1. Offset Nulling Circuit Figure 2. Burn-In Circuit Package Information SOICN.EPS MAX480 High-Precision, Low-Voltage, Micropower Op Amp 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 © 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.