Description:
The AD8231-EP is a low drift, rail-to-rail, instrumentation amplifier with software-programmable gains of 1, 2, 4, 8, 16, 32, 64, or 128. The gains are programmed via digital logic or pin strapping.
The AD8231-EP is ideal for applications that require precision performance over a wide temperature range, such as industrial temperature sensing and data logging. Because the gain setting resistors are internal, maximum gain drift is only 10 ppm/°C for gains of 1 to 32. Because of the auto-zero input stage, maximum input offset is 15 μV and maximum input offset drift is just 50 nV/°C. CMRR is 80 dB for G = 1, increasing to 110 dB at higher gains.
Features
1. Digitally/pin-programmable gain
- G = 1, 2, 4, 8, 16, 32, 64, or 128
2. Specified from −55°C to +125°C
- 50 nV/°C maximum input offset drift
- 10 ppm/°C maximum gain drift
3. Excellent dc performance
- 80 dB minimum CMR, G = 1
- 15 μV maximum input offset voltage
- 500 pA maximum bias current
- 0.7 μV p-p noise (0.1 Hz to 10 Hz)
4. Good ac performance
- 2.7 MHz bandwidth, G = 1
- 1.1 V/μs slew rate
5. Rail-to-rail output
6. Shutdown/multiplex
7. Extra op amp
8. Single-supply range: 3 V to 6 V
9. Dual-supply range: ±1.5 V to ±3 V
ENHANCED PRODUCT FEATURES
1. Supports defense and aerospace applications (AQECstandard)
2. Military temperature range (−55°C to +125°C)
3. Controlled manufacturing baseline
4. One assembly/test site
5. One fabrication site
6. Enhanced product change notification
7. Qualification data available on request
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