Texas Instruments OPAx182 High-Precision Operational Amplifiers
Texas Instruments OPAx182 High-Precision Operational Amplifiers (Op Amps) are ultra-low noise, fast-settling, zero-drift devices providing rail-to-rail output operation. These devices feature unique MUX-friendly architecture and a controlled startup system. These features and excellent AC performance, combined with only 0.45µV of offset voltage and 0.003 µV/°C of drift over temperature, make the Texas Instruments OPAx182 an excellent choice for data acquisition, battery test, analog input modules, weigh scales, and any other systems requiring high DC precision and low noise.
The MUX-friendly input architecture prevents inrush current when applying large input differential voltages, improving settling performance in multichannel systems. Moreover, the controlled startup system rejects any inrush current upon ramping up the supply rails, all while providing robust ESD protection during shipment, handling, and assembly. The device is specified from -40°C to +125°C.
Features
- Ultra-high precision
- 0.003µV/°C zero-drift
- 4µV (maximum) ultra-low offset voltage
- Excellent dc precision
- 168dB CMRR
- 170dB open-loop gain
- Low noise
- 5.7nV/√Hz en at 1kHz
- 0.12µVPP 0.1Hz to 10Hz noise
- Excellent dynamic performance
- 5MHz gain bandwidth
- 10V/µs slew rate
- 10V step, 0.01% in 1.7µs fast settling
- Robust design
- MUX-friendly inputs
- RFI/EMI filtered inputs
- ±2.25V to ±18V, 4.5V to 36V wide supply
- 0.85mA quiescent current
- Rail-to-rail output
- Input includes the negative rail
Applications
- Battery test
- DC power supply, AC source, electronic load
- Data acquisition (DAQ)
- Semiconductor test
- Weigh scale
- Analog input module
- Flow transmitter
Functional Block Diagram
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Published: 2020-08-10
| Updated: 2024-07-31