GENERAL DESCRIPTION
The AD623 is an integrated single-supply instrumentation amplifier that delivers rail-to-rail output swing on a 3 V to 12 V supply. The AD623 offers superior user flexibility by allowing single gain set resistor programming and by conforming to the 8-lead industry standard pinout configuration. With no external
resistor, the AD623 is configured for unity gain (G = 1), and with an external resistor, the AD623 can be programmed for gains up to 1000.

FEATURES
Easy to use
Higher performance than discrete design
Single-supply and dual-supply operation
Rail-to-rail output swing
Input voltage range extends 150 mV below ground (single supply)
Low power, 550 μA maximum supply current
Gain set with one external resistor
   Gain range: 1 (no resistor) to 1000
High accuracy dc performance
  0.10% gain accuracy (G = 1)
  0.35% gain accuracy (G > 1)
  10 ppm maximum gain drift (G = 1)
  200 μV maximum input offset voltage (AD623A)
  2 μV/°C maximum input offset drift (AD623A)
  100 μV maximum input offset voltage (AD623B)
  1 μV/°C maximum input offset drift (AD623B)
  25 nA maximum input bias current
Noise: 35 nV/√Hz RTI noise @ 1 kHz (G = 1)
Excellent ac specifications
  90 dB minimum CMRR (G = 10); 70 dB minimum CMRR (G = 1) at 60 Hz, 1 kΩ source imbalance
  800 kHz bandwidth (G = 1)
  20 μs settling time to 0.01% (G = 10)

APPLICATIONS
Low power medical instrumentation
Transducer interfaces
Thermocouple amplifiers
Industrial process controls
Difference amplifiers
Low power data acquisition