The AD8228 Low Gain Drift Precision Instrumentation Amplifier is a high performance instrumentation amplifier with very high gain accuracy. Because all gain setting resistors are internal and laser trimmed, gain drift is very low. The AD8228 also features 100 dB of common mode rejection ratio and 8 nV/√Hz of low noise, making it ideal for applications requiring high precision and low noise such as weigh scales, industrial process controls, bridge amplifiers, precision data acquisition systems, medical instrumentation, strain gages, and transducer interfaces.
The AD8228 instrumentation amplifier offers high gain accuracy, low offset, low noise, and excellent common‑mode rejection. It is available in 8‑lead MSOP and SOIC packages and operates from +2.3 V to +18 V, making it suitable for bridge signal conditioning and other precision applications.
Key features include pin‑strappable gains of 10 and 100, a 650 kHz –3 dB bandwidth at gain 10, 2 ppm/°C gain drift, and 100 dB CMRR. The device is rated for industrial temperature ranges (‑40 °C to +85 °C) and can operate up to +125 °C.
| Gain Settings | 10 or 100 (pin‑strappable) |
|---|---|
| Supply Voltage Range | +2.3 V to +18 V |
| Slew Rate | 2 V/µs |
| Input Offset Voltage | 0.02 % gain error, 50 pV max offset |
The AD8228 offers two gain settings, 10 and 100, which are selected by shorting the gain pins together for 100 or leaving them open for 10.
It can operate from a low supply of +2.3 V up to a high supply of +18 V.