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AD8235:  40 µA Micropower Instrumentation Amplifier in WLCSP Package

Product Details

Product Status:Recommended for New Designs

The AD8235 is the smallest and lowest power instrumentation amplifier in the industry. It is available in a 1.5 mm × 2.2 mm wafer level chip scale package (WLCSP). The AD8235 draws a maximum quiescent current of 40 μA. In addition, it draws a maximum 500 nA of current during shutdown mode, making it an excellent instrumentation amplifier for battery powered, portable applications.

The AD8235 can operate on supply voltages as low as 1.8 V. The input stage allows for wide rail-to-rail input voltage range without the crossover distortion, common in other designs. The rail-to-rail output enables easy interfacing to ADCs.

The AD8235 is an excellent choice for signal conditioning. Its low input bias current of 50 pA and high CMRR of 110 dB (G = 100) offer tremendous value for its size and low power.

It is specified over the extended industrial temperature range of −40°C to 125°C.


  • Medical instrumentation
  • Low-side current sense
  • Portable electronics


  • Low Power
    40 μA maximum supply current
    6 nA shutdown current
  • Low input currents
    50 pA input bias current
    25 pA input offset current
  • High Common Mode Rejection Ratio (CMRR)
    110 dB CMRR , G = 100
  • Space Saving
    WLCSP package
  • Zero input crossover distortion
  • Versatile
    Rail-to-rail input and output
    Gain set with single resistor (G = 5 to 200)
  • AD8236: μSOIC package version of AD8235

Functional Block Diagram for AD8235

Of Note ...

For additional ADI Healthcare Products and related information, please visit


Title Content Type File Type
AD8235: 40 μA Micropower Instrumentation Amplifier in WLCSP Package Data Sheet (Rev 0, 09/2009) (pdf, 107 kB) Data Sheets PDF
AD8235: World's Smallest Micropower Instrumentation Amplifier Videos HTML
A Designer's Guide to Instrumentation Amplifiers (3rd Edition) Design Handbooks HTML
MS-2178: Discussion Between CareFusion and Analog Devices: Optimizing Performance and Lowering Power in an EEG Amplifer  (pdf, 147 kB) Technical Articles PDF
Medical Devices Get A Prescription For Wafer-Level Chip-Scale Packaging
You no longer need to go to the hospital for your next medical treatment. Now, you can carry medical devices wherever you go—and that means small size and low-power design requirements.
(Electronic Design, July 23, 2009)
Technical Articles HTML
High-performance Adder Uses Instrumentation Amplifiers
Make an adder circuit using instrumentation amplifiers to increase input impedance.
(EDN, 9/3/2009)
Technical Articles HTML
Low Power Amplifiers Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8235 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

AD8235 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8235ACBZ-P7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 11 Ind Reel, 3000 - $0.99 Y  Material Info PCN Purchase Sample
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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