AD8426 is a 2-channel, wide supply range, rail-to-rail output instrumentation amplifier with a single supply range of 2.2 V to 36 V and a dual supply range of ±1.35 V to ±18 V. It can be used in industrial process controls, bridge amplifiers, medical instrumentation, portable data acquisition, and multichannel systems.
The AD8426 is a dual‑channel, low‑cost instrumentation amplifier that operates from a very wide supply range. It provides rail‑to‑rail output, can handle input voltages below ground, and its gain is set with a single external resistor covering a range from 1 to 1000. The device is offered in a 4 mm × 4 mm LFCSP package without a metal pad, allowing easy PCB routing.
Typical applications include industrial process control, bridge amplifiers, medical instrumentation, portable data acquisition and multichannel systems. The datasheet includes detailed specifications, pin descriptions, connection diagrams, absolute maximum ratings, and application notes such as precision strain‑gage and differential‑drive configurations.
| Gain Range | 1 to 1000 |
|---|---|
| Input Noise | 24 nV/√Hz |
| CMRR (G=1) | 80 dB minimum |
| Quiescent Current (per amp) | 350 µA |
| Operating Temperature Range | −40 °C to +125 °C |
Gain is set with a single external resistor using the formula G = 1 + (49.4 kΩ / R_G).
At a gain of 1 the AD8426 provides a minimum CMRR of 80 dB.
The device can tolerate supply voltages up to ±18 V.