The Instrumentation Amplifier ICs amplify the difference between two input signal voltages, while rejecting any signals that are common to both inputs. The DC precision and gain accuracy is maintained within a noisy environment, and also where large common-mode signals (AC power line frequency) are present.
Feature
- Micropower, 85 μA maximum supply current
- Wide power supply range(+2.2 V to ±18 V)
- Easy to use Gain set with one external resistor Gain range 5 (no resistor) to 1000
- Higher performance than discrete designs
- Rail-to-rail output swing
- High accuracy dc performance 0.03% typical gain accuracy (G = +5) (AD627A) 10 ppm/°C typical gain drift (G = +5) 125 μV maximum input offset voltage (AD627B dual supply) 200 μV maximum input offset voltage (AD627A dual supply)
- 1 μV/°C maximum input offset voltage drift (AD627B) 3 μV/°C maximum input offset voltage drift (AD627A)
- Noise: 38 nV/√Hz RTI noise @ 1 kHz (G = +100)
- Excellent ac specifications AD627A: 77 dB minimum CMRR(G = +5) AD627B: 83 dB minimum CMRR(G = +5) 80 kHz bandwidth (G = +5) 135 μs settling time to 0.01% (G = +5, 5 V step)
Applications
- 4 mA to 20 mA loop-powered applications
- Low power medical instrumentation—ECG, EEG
- Transducer interfacing
- Thermocouple amplifiers
- Industrial process controls
- Low power data acquisition
- Portable battery-powered instruments
(Picture: Pinout)
