Silicon Circuit Board Chips

AD623ARZ Single-Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier

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

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.

ABSOLUTE MAXIMUM RATINGS

1 Specification is for device in free air:

8-Lead PDIP Package: θJA = 95°C/W

8-Lead SOIC Package: θJA = 155°C/W

8-Lead MSOP Package: θJA = 200°C/W.