AD623 Rail-to-Rail Instrumentation Amplifier
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Prices updated: 13 Oct 2026
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About this product
A low-cost instrumentation amplifier that operates from a single or dual supply between 3 V and 12 V, with a rail-to-rail output swing. Its gain is set from 1 to 1000 with one external resistor, which makes it suitable for sensor bridges and small-signal measurement.
Specifications
- Supply voltage
- 3 V to 12 V (single or dual)
- Gain range
- 1 to 1000, set by one external resistor
- Maximum supply current
- 550 µA
- Bandwidth
- 800 kHz (G = 1)
- Input noise
- 35 nV/√Hz at 1 kHz (RTI)
- Output swing
- Rail-to-rail
Frequently asked questions
How do I set the gain?
Connect one external resistor RG between the gain pins. Per the datasheet, G = 1 + 100 kΩ / RG.
Can it run from a single 5 V supply?
Yes. The AD623 works from a single supply between 3 V and 12 V. Its input range extends 150 mV below ground on a single supply, while the output swings rail to rail.
