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AD8222:  Precision, Dual-Channel Instrumentation Amplifier

Product Details

Product Status:Recommended for New Designs

The AD8222 is a dual-channel, high performance instrumentation amplifier that requires only one external resistor per amplifier to set gains of 1 to 10,000.

The AD8222 is the first dual instrumentation amplifier in the small 4 mm × 4 mm LFCSP. It requires the same board area as a typical single instrumentation amplifier. The smaller package allows a 2× increase in channel density and a lower cost per channel, all with no compromise in performance.

The AD8222 can also be configured as a single-channel, differential output instrumentation amplifier. Differential outputs provide high noise immunity, which can be useful when the output signal must travel through a noise environment, such as with remote sensors. The configuration can also be used to drive differential input ADCs.

The AD8222 maintains a minimum CMRR of 80 dB to 4 kHz for all grades at G = 1. High CMRR over frequency allows the AD8222 to reject wideband interference and line harmonics, greatly simplifying filter requirements. The AD8222 also has a typical CMRR drift over temperature of just 0.07 µV/V/°C at G = 1.

The AD8222 operates on both single and dual supplies and only requires 2.2 mA maximum supply current for both amplifiers. It is specified over the industrial temperature range of -40°C to +85°C and is fully RoHS compliant.

For a single-channel version, see the AD8221.

Applications
    Multichannel data acquisition for:
  • ECG and medical instrumentation
  • Industrial process controls
  • Wheatstone bridge sensors

  • Differential drives for:
  • High resolution input ADCs
  • Remote sensors

FEATURES and BENEFITS

  • Two channels in small 4 mm × 4 mm LFCSP
  • Gain set with 1 resistor per amplifier (G = 1 to 10,000)
  • Low noise
    8 nV/√Hz @ 1 kHz
    0.25 µV p-p (0.1 Hz to 10 Hz)
  • Excellent ac performance
    150 kHz bandwidth (G = 100)
    13 µs settling time to 0.001%
  • High accuracy dc performance (B grade)
    60 µV maximum input offset voltage
    0.3 µV/°C maximum input offset drift
    1.0 nA maximum input bias current
    126 dB minimum CMRR (G = 100)
  • Differential output option (single channel)
    Fully specified
    Adjustable common-mode output
  • Supply range: ±2.3 V to ±18 V

Functional Block Diagram for AD8222

Documentation

Title Content Type File Type
AD8222: Precision, Dual-Channel Instrumentation Amplifier Data Sheet (Rev A, 02/2010) (pdf, 589 kB) Data Sheets PDF
AN-282: Fundamentals of Sampled Data Systems  (pdf, 2131 kB) Application Notes PDF
AN-671: Reducing RFI Rectification Errors in In-Amp Circuits  (pdf, 208 kB) Application Notes PDF
AN-683: Strain Gage Measurement Using an AC Excitation  (pdf, 122 kB) Application Notes PDF
A Designer's Guide to Instrumentation Amplifiers (3rd Edition) Design Handbooks HTML
Auto-Zero Amplifiers  (doc, 75 kB)
A wide variety of electronic applications, especially those involving very small input signals, require signal paths with very low offset voltage and offset voltage drift over time and temperature.
Technical Articles DOC
High-performance Adder Uses Instrumentation Amplifiers
Make an adder circuit using instrumentation amplifiers to increase input impedance.
(EDN, 9/3/2009)
Technical Articles HTML
Dual In-Amp And Signal Isolators Sweat The Small Stuff
(ED, 4/13/2006)
Product Reviews HTML
ANALOG DESIGN: In-amp Specifies Differential Output
(EE Times, 3/13/2006)
Product Reviews HTML
Dual-channel In-amp Drives Differentially
(EETimes, 3/16/2006)
Product Reviews HTML
Dual-Channel Instrumentation Amplifier Also Improves Performance  (htm)
(analogZONE, 4/17/2006)
Product Reviews HTM
Leading Inside Advertorials: Applying Instrumentation Amplifiers Effectively–The Importance of an Input Ground Return  (pdf, 121 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8222 SPICE Macro-Model SPICE Models HTML
AD8221 SPICE Macro-Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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.

SampleSample & Buy

Price, packaging, availability

AD8222 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8222ACPZ-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $3.63 Y  Material Info PCN Purchase Sample
AD8222ACPZ-RL Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 5000 - $3.63 Y  Material Info PCN Purchase
AD8222ACPZ-WP Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Tray, 64 $4.36 $3.63 Y  Material Info PCN Purchase
AD8222BCPZ-R7 Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 1500 - $6.37 Y  Material Info PCN Purchase Sample
AD8222BCPZ-RL Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Reel, 5000 - $6.37 Y  Material Info PCN Purchase
AD8222BCPZ-WP Status: Production 16 ld LFCSP (4x4mm, 2.50mm exposed pad) 16 Ind Tray, 64 $7.64 $6.37 Y  Material Info PCN Purchase
AD8222HACPZ-R7 Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 1500 - $3.73 Y  Material Info PCN Purchase Sample
AD8222HACPZ-RL Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 5000 - $3.73 Y  Material Info PCN Purchase
AD8222HACPZ-WP Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Tray, 64 $4.46 $3.73 Y  Material Info PCN Purchase
AD8222HBCPZ-R7 Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 1500 - $6.47 Y  Material Info PCN Purchase
AD8222HBCPZ-RL Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 5000 - $6.47 Y  Material Info PCN Purchase
AD8222HBCPZ-WP Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Tray, 64 $7.74 $6.47 Y  Material Info PCN Purchase
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.

AD8222 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8222-EVALZ Status: Production Evaluation Board $59.95 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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