AD8420 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD8420
Manufacturer

ADI
ChipWorker Part#

CW983493400
Description

Wide Supply Range, Micropower, Rail-to-Rail Instrumentation Amplifier
Documentation

Datasheet

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AD8420 Specifications

Attribute	Attribute Value

Part Number	AD8420
Manufacturer	ADI
ChipWorker Part#	CW983493400
Documentation	Datasheet
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Product Lifecycle Status	Recommended for New Designs

Product Description

Product Details
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 architecture that gives it an excellent input common-mode range. Unlike conventional instrumentation amplifiers, the AD8420 can 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.
Single-supply operation, micropower current consumption, and rail-to-rail output swing make the AD8420 ideal for battery-powered applications. Its rail-to-rail output stage maximizes dynamic range when operating from low supply voltages. Dual-supply operation (±15 V) and low power consumption make the AD8420 ideal for a wide variety of applications in medical or industrial instrumentation.
The AD8420 is available in an 8-lead MSOP package. Performance is specified over the full temperature range of −40°C to +85°C, and the part is operational from −40°C to +125°C
**APPLICATIONS**
Bridge amplifiers
Pressure Measurement
Medical instrumentation
Portable data acquisition
Multichannel systems
### Features and Benefits
Maximum supply current:
90 μA
Minimum CMRR: 100 dB
Drives heavy capacitive loads:
~700 pF
Rail-to-rail output
Input voltage range goes below ground
Gain set with 2 external resistors
Can achieve low gain drift at any gain
Very wide power supply range
Single supply: 2.7 V to 36 V
Dual supply: ±2.7 V to ±18 V
Bandwidth (G = 100): 2.5 kHz
Input voltage noise: 55 nV/√Hz
See data sheet for additional features

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