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AD8420

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. A) Product Selection Table

Part Models: 3
1ku List Price: Starting From $1.05

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Overview

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

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

Part Models: 3
1ku List Price: Starting From $1.05

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
AD8420ARMZ	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD8420ARMZ-R7	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD8420ARMZ-RL	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jan 5, 2015 - 14_0246 Qualification of ASE Chungli, as an Alternate Assembly Site for Select MSOP Devices
		PCN14_0246_Form Material_Report Detailed Change Description Qualification Results Summary
AD8420ARMZ	PRODUCTION
AD8420ARMZ-R7	PRODUCTION
AD8420ARMZ-RL	PRODUCTION
Dec 15, 2014 - 14_0269 AD8420 Data Sheet Change
		PCN14_0269_Form Material_Report
AD8420ARMZ	PRODUCTION
AD8420ARMZ-R7	PRODUCTION
AD8420ARMZ-RL	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

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Tools & Simulations

In-Amp Diamond Plot Tool

The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.

Open Tool

SPICE Model 1

AD8420 SPICE Macro Model

Evaluation Kits

AD8237 and AD8420 Evaluation Board

Buy Now View Details

Product Details

The EVAL-INAMP-ICF-RMZ offers users the option of evaluating the AD8237 or the AD8420 indirect current feedback (ICF) instrumentation amplifiers individually or connected to adjacent boards in an application. This evaluation board ships with both instrumentation amplifiers in surface-mount MSOP packages.

Reference Quick Start section of user guide UG-513 to get started.