Single and Dual-Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier

The AD623 is an integrated, single- or dual-supply instrumentation amplifier that delivers rail-to-rail output swing using supply voltages from 2.7 V to 12 V. The AD623 offers 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 of up to 1000.

The accuracy of the AD623 is the result of increasing ac common-mode rejection ratio (CMRR) coincident with increasing gain. Line noise harmonics are rejected due to constant CMRR up to 200 Hz. The AD623 has a wide input common-mode range and amplifies signals with common-mode voltages as low as 150 mV below ground. The AD623 maintains optimal performance with dual and single polarity power supplies.

Applications

* Low power medical instrumentation

* Transducer interfaces

* Thermocouple amplifiers

* Industrial process controls

* Difference amplifiers

* Low power data acquisition

* Easy to use

* Rail-to-rail output swing

* Input voltage range extends 150 mV below ground (single supply)

* Low power, 550 μA maximum quiescent current

* Gain set with one external resistor

* Gain range: 1 to 1000

* 14-terminal, 6 mm × 5.6 mm × 2.2 mm, LCC package