The AD624 is a high precision, low noise, instrumentation amplifier designed primarily for use with low level transducers, including load cells, strain gauges and pressure transducers.
The AD624 is a high‑precision, low‑noise instrumentation amplifier designed for low‑level transducers such as load cells, strain gauges, and pressure transducers. It offers pin‑programmable gains of 1, 100, 200, 500 and 1000 with no external components required, and additional gains can be set with a single external resistor.
The document provides full electrical specifications, absolute maximum ratings, typical performance curves, and application guidance, including gain programming, offset nulling, and input protection considerations.
| Low Noise (0.1 Hz‑10 Hz) | 0.2 pV p‑p |
|---|---|
| Gain Bandwidth Product | 25 MHz |
| Low Input Offset Voltage | 25 pV max |
| Gain Range (pin programmable) | 1 to 1000 |
| CMRR (G = 500‑1000) | 130 dB min |
| Supply Voltage Range | +6 V to +18 V |
The AD624 provides pin‑programmable gains of 1, 100, 200, 500 and 1000, and other gains can be set with a single external resistor.
The input offset voltage is specified as 25 pV maximum.
The device operates from a supply voltage of +6 V to +18 V.
At gains of 500 to 1000 the AD624 achieves a common‑mode rejection ratio of at least 130 dB.