AD8420 Datasheet PDF – Instrumentation Amplifier

Part Number: AD8420

Function: Wide Supply Range, Micropower, Rail-to-Rail Instrumentation Amplifier

Package: 8-lead MSOP type

Manufacturer: Analog Devices


AD8420 datasheet



The AD8420 is a low cost, micropower, wide supply range, instrumentation amplifier with a rail-to-rail output and a novel architecture that allows for extremely flexible design. It is optimized to amplify small differential voltages in the presence of large common-mode signals. The AD8420 is based on an indirect current feedback architecturethat gives it an excellent input common-mode range. Unlike conventional instrumentation amplifiers, the AD8420can easily amplify signals at or even slightly below ground without requiring dual supplies. The AD8420 has rail-to-rail output, and the output voltage swing is completely independent of the input common mode voltage.


1. Maximum supply current: 80 μA
2. Minimum CMRR: 100 dB
3. Drives heavy capacitive loads: ~700 pF
4. Rail-to-rail output
5. Input voltage range goes below ground
6. Gain set with 2 external resistors
7. Can achieve low gain drift at any gain
8. Very wide power supply range
9. Single supply: 2.7 V to 36 V
10. Dual supply: ±2.7 V to ±18 V
11. Bandwidth (G = 100): 2.5 kHz
12. Input voltage noise: 55 nV/√Hz
13. High dc precision
14. Maximum offset voltage: 125 μV
15. Maximum offset drift: 1 μV/°C
16. Maximum differential input voltage: ±1 V


1. Bridge amplifiers
2. Pressure measurement
3. Medical instrumentation
4. Portable data acquisition
5. Multichannel systems

Other data sheets are available within the file:


AD8420 Datasheet PDF Download

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