MXL1001

19-0286; Rev 1; 8/94 Precision Operational Amplifier _______________General Description The MXL1001 offers significant specification improvement over earlier precision operational amplifiers and is pincompatible with the industry-standard LT1001. Particular attention has been paid to the optimization of key parameters such as input offset voltage, common-mode rejection, and power-supply rejection. In addition, the high-performance MXL1001C commercial temperature device provides considerable cost savings when compared to equivalent grades of competing precision amplifiers. The input offset voltage of all units is less than 60µV, allowing the premium military device, the MXL1001AM, to be specified at 15µV max. Power dissipation is close to half that of the industry-standard OP-07 precision op amp, without sacrificing noise or speed performance. A useful by-product of lower dissipation is decreased warm-up drift. ____________________________Features o Guaranteed Low Offset Voltage MXL1001AM: 15µV max MXL1001C: 60µV max o Guaranteed Low Drift MXL1001AM: 0.6µV/°C max MXL1001C: 1.0µV/°C max o Guaranteed Low Bias Current MXL1001AM: 2nA max MXL1001C: 4nA max o Guaranteed CMRR MXL1001AM: 114dB min MXL1001C: 110dB min o Guaranteed PSRR MXL1001AM: 110dB min MXL1001C: 106dB min o Low Power Dissipation MXL1001AM: 75mW max MXL1001C: 80mW max o Low Noise: 0.3µVp-p MXL1001 ________________________Applications Thermocouple Amplifiers Low-Level Signal Processing Strain Gauge Amplifiers High-Accuracy Data Acquisition ______________Ordering Information PART MXL1001ACN8 MXL1001CN8 MXL1001ACS8 MXL1001CS8 MXL1001ACJ8 MXL1001CJ8 MXL1001ACH MXL1001CH MXL1001AMJ8 MXL1001MJ8 MXL1001AMH MXL1001MH TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -55°C to +125°C -55°C to +125°C -55°C to +125°C -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 Plastic DIP 8 SO 8 SO 8 CERDIP 8 CERDIP 8 TO-99 8 TO-99 8 CERDIP 8 CERDIP 8 TO-99 8 TO-99 __________________Pin Configuration TOP VIEW VOS TRIM VOS TRIM 8 1 7 V+ -IN 2 MXL1001 3 4 V5 6 VOUT +IN N.C. __________Typical Operating Circuit R1 SENSING JUNCTION R3 TO-99 VOS TRIM 1 -IN 2 +IN 3 V- 4 8 7 VOS TRIM V+ VOUT N.C. REFERENCE JUNCTION R2 R4 MXL1001 MXL1001 6 5 R1 R2 = R3 R4 DIP/SO HIGH-STABILITY THERMOCOUPLER AMPLIFIER 1 ________________________________________________________________ Maxim Integrated Products Call toll free 1-800-998-8800 for free samples or literature. Precision Operational Amplifier MXL1001 ABSOLUTE MAXIMUM RATINGS Total Supply Voltage (V+ to V-) ...........................................±22V Continuous Power Dissipation .........................................500mW TO-99(H)—derate at 7.1mW/°C above +80°C CERDIP(J)—derate at 6.7mW/°C above +75°C Plastic DIP(P)—derate at 5.6mW/°C above +36°C Small Outline(S)—derate at 5mW/°C above +55°C Differential Input Voltage .....................................................±30V Input Voltage (Note 1)..........................................................±22V Duration of Output Short Circuit ....................................Indefinite Operating Temperature Ranges: MXL1001C_/AC_.................................................0°C to +70°C MXL1001M_/AM_...........................................-55°C to +125°C Junction Temperature (TJ).................................-65°C to +160°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C Note 1: For supply voltages less than ±22V, the absolute maximum input voltage is equal to the supply voltage. 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 = ±15V, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MXL1001AM MXL1001AC MXL1001AM MXL1001AC MIN TYP MAX 7 10 0.2 0.3 ±0.5 0.1Hz to 10Hz (Note 4) fO = 10Hz (Note 4) Input Noise Voltage Density Input Resistance (Differential Mode) Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing Slew Rate Closed-Loop Bandwidth Power Consumption eN fO = 100Hz (Note 4) fO = 1000Hz (Note 4) RIN IVR CMRR PSRR AVO VO SR BW PD VCM = ±13V VS = ±3V to ±18V RL ≥ 2kΩ, VO = ±12V RL ≥ 1kΩ, VO = ±10V RL ≥ 2kΩ RL ≥ 1kΩ RL ≥ 2kΩ (Note 4) AVCL = +1V (Note 4) VS = ±15V, no load VS = ±3V, no load (Note 5) 30 ±13 114 110 450 300 0.3 10.3 10.0 9.6 100 ±14 126 123 800 500 15 25 1.0 2.0 ±2.0 0.6 18.0 13.0 11.0 15 ±13 110 106 400 250 MXL1001M MXL1001C MIN TYP MAX 18 18 0.3 0.4 ±0.7 0.3 10.5 10.0 9.8 80 ±14 126 123 800 500 60 60 1.5 3.8 ±4.0 0.6 18.0 13.0 11.0 MΩ V dB dB V/mV V V/µs MHz 80 8 mW nV/√Hz UNITS Input Offset Voltage Long-Term Input Offset Voltage Stability Input Offset Current Input Bias Current Input Noise Voltage VOS VOS/Time IOS IB eN p-p (Note 2) (Note 3) µV µV/ Month nA nA µVp-p ±13.0 ±14.0 ±12.0 ±13.5 0.1 0.4 0.25 0.8 46 4 75 6 ±13.0 ±14.0 ±12.0 ±13.5 0.1 0.4 0.25 0.8 48 4 Note 2: MXL1001A grade VOS is measured one minute after application of power. For all other grades VOS is measured approximately 0.5 seconds after application of power. Note 3: Long-Term Input Offset Voltage Stability refers to the average trend line of VOS vs. Time over extended periods after the first 30 days of operation. Excluding the initial hour of operation, changes in VOS during the first 30 operating days are typically 2.5µV. Parameter is sample tested. Note 4: Sample tested. Note 5: Guaranteed by design. 2 _______________________________________________________________________________________ Precision Operational Amplifier ELECTRICAL CHARACTERISTICS PARAMETER Input Offset Voltage Average Temperature Coefficient of Input Offset Voltage Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing Power Dissipation SYMBOL VOS TCVOS IOS IB IVR CMRR PSRR AVO VO PD VCM = ±13V VS = ±3V to ±18V RL ≥ 2kΩ, VO = ±10V RL ≥ 2kΩ No load ±13 110 104 300 MXL1001 (VS = ±15V, -55°C ≤ TA ≤ +125°C, unless otherwise noted.) CONDITIONS (Note 6) MXL1001AM MIN TYP 30 0.2 0.8 ±1.0 ±14 122 117 700 55 90 MAX 60 0.6 4.0 ±4.0 ±13 106 100 200 MXL1001M MIN TYP 45 0.3 1.2 ±1.5 ±14 120 117 700 60 100 MAX 160 1.0 7.6 ±8.0 UNITS µV µV/°C nA nA V dB dB V/mV V mW ±12.5 ±13.5 ±12.5 ±13.5 ELECTRICAL CHARACTERISTICS PARAMETER Input Offset Voltage Average Temperature Coefficient of Input Offset Voltage Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing Power Dissipation SYMBOL VOS TCVOS IOS IB IVR CMRR PSRR AVO VO PD (VS = ±15V, 0°C ≤ TA ≤ +70°C, unless otherwise noted.) CONDITIONS (Note 6) MXL1001AC MIN TYP 20 0.2 0.5 ±0.7 ±13 VCM = ±13V VS = ±3V to ±18V RL ≥ 2kΩ, VO = ±10V RL ≥ 2kΩ No load 110 106 350 ±14 124 120 750 50 85 MAX 60 0.6 3.5 ±3.5 ±13 106 103 250 MXL1001C MIN TYP 30 0.3 0.6 ±1.0 ±14 123 120 750 55 90 MAX 110 1.0 5.3 ±5.5 UNITS µV µV/°C nA nA V dB dB V/mV V mW ±12.5 ±13.8 ±12.5 ±13.8 Note 6: MXL1001A grade offset voltage is measured one minute after application of power. For all other grades VOS is measured 0.5 seconds after power on. _______________________________________________________________________________________ 3 Precision Operational Amplifier MXL1001 __________Applications Information The MXL1001 series devices are pin-compatible with the OP-07, OP-05, 725, 108A or 101A amplifiers. The MXL1001 amplifiers can be used to upgrade older designs using these devices, with or without removal of external frequency compensation or nulling components. The MXL1001 can also be used in 741, LF156 or OP-15 applications provided the nulling circuitry is removed. The MXL1001 is specified over a wide supply voltage range from ±3V to ±18V. Operation with lower supplies is possible down to ±1.2V (two NiCd batteries), however, at this level the device is stable only in closed-loop gains of +2 and above (or inverting gain of one or higher). Unless proper care is exercised, thermocouple effects caused by temperature gradients across dissimilar metals at the input terminal connections, can exceed the inherent offset-voltage drift of the amplifier. Air currents over the device leads should be minimized, package leads should be short, and the two input leads should be as close together as possible and maintained at the same temperature. 1 INPUT 2 8 7 20k V+ MXL1001 3 4 V- 6 OUTPUT Figure 1. Optional Offset Nulling Circuit ___________________Chip Topography V OS T RIM V OS T RIM V+ V OUT Offset-Voltage Adjustment The input offset voltage of the MXL1001, and its temperature drift, are minimized by zener-zap trimming at the wafer level. If further nulling of VOS is required, this can be performed using a 10kΩ or 20kΩ potentiometer with no degradation of VOS drift with temperature. Trimming to a value other than zero creates a drift of (VOS/300)µV/°C; i.e., if VOS is adjusted to 300µV, the change in drift will be 1µV/°C. The adjustment range with a 10kΩ or 20kΩ potentiometer is approximately ±2.5mV. If less adjustment range is needed, the sensitivity and resolution of the offset nulling can be improved by using a potentiometer of lower ohmic value in conjunction with fixed resistors. 0.076" (1.93mm) V- V OS T RIM -IN 0.102" (2.59mm) +IN SUBSTRATE IS CONNECTED TO V- 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. 4 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1994 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.