The AD8421 is a 3 nV/√Hz low power instrumentation amplifier with excellent AC and DC performance.
The AD8421 is a low cost, low power, extremely low noise, ultralow bias current, high speed instrumentation amplifier. It features excellent ac specifications, including a 10 MHz bandwidth at unity gain and a 35 V/μs slew rate. The device is designed for applications requiring high channel count and multiplexed systems, such as medical instrumentation and vibration analysis.
The AD8421 delivers 3 nV/√Hz input voltage noise and 200 fA/√Hz current noise with only 2 mA quiescent current. It includes unique protection methods allowing input voltages up to 40 V from the opposite supply rail. Gain is set with a single resistor ranging from 1 to 10,000, and the reference pin allows for precise output offset adjustment. This manual is written in Chinese.
The maximum supply current is 2.3 mA.
The gain is set with a single resistor, ranging from 1 to 10,000.
The settling time to 0.001% is 0.6 μs at G=10.