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AD624:  High Precision, Low Noise Instrumentation Amplifier

Product Details


The AD624 is a high precision, low noise, instrumentation amplifier designed primarily for use with low level transducers, including load cells, strain gauges and pressure transducers. An combination of low noise, high gain accuracy, low gain temperature coefficient and high linearity make the AD624 ideal for use in high resolution data acquisition systems.

The AD624C has an input offset voltage drift of less than 0.25 µV/°C, output offset voltage drift of less than 10 µV/°C, CMRR above 80 dB at unity gain (130 dB at G = 500) and a maximum nonlinearity of 0.001% at G = 1. In addition to these outstanding dc specifications, the AD624 exhibits superior ac performance as well. A 25 MHz gain bandwidth product, 5 V/µs slew rate and 15 µs settling time permit the use of the AD624 in high speed data acquisition applications.

The AD624 does not need any external components for trimmed gains of 1, 100, 200, 500 and 1000. Additional gains such as 250 and 333 can be programmed within one percent accuracy with external jumpers. A single external resistor can also be used to set the 624's gain to any value in the range of 1 to 10,000.

FEATURES and BENEFITS

  • Low Noise: 0.2 µV p-p 0.1 Hz to 10 Hz
  • Low Gain TC: 5 ppm max (G = 1)
  • Low Nonlinearity: 0.001% max (G = 1 to 200)
  • High CMRR: 130 dB min (G = 500 to 1000)
  • Pin Programmable Gains of
    1, 100, 200, 500, 1000
  • Low Input Offset Voltage: 25 µV, max
  • Low Input Offset Voltage Drift: 0.25 µV/°C max
  • Gain Bandwidth Product: 25 MHz
  • No External Components Required
  • Internally Compensated

Functional Block Diagram for AD624

Documentation

Title Content Type File Type
AD624: Precision Instrumentation Amplifier Data Sheet  (Rev C, 05/2001) (pdf, 387 kB) Data Sheets PDF
AD624: Military Data Sheet (Rev A, 12/2000) (pdf, 108 kB) Data Sheets PDF
AN-244: A User's Guide to I.C. Instrumentation Amplifiers  (pdf, 522 kB) Application Notes PDF
AN-245: Instrumentation Amplifiers Solve Unusual Design Problems  (pdf, 543 kB)
Traditionally Considered Only for Transducer-Conditioning Applications, Instrumentation Amplifiers Bring Unique Performance Benefits to a Range of Other Applications as Well.
Application Notes PDF
AN-671: Reducing RFI Rectification Errors in In-Amp Circuits  (pdf, 208 kB) Application Notes PDF
AN-589: Ways to Optimize the Performance of a Difference Amplifier  (pdf, 115 kB)
This Application Note presents several ways to build and optimize the performance of a discrete difference amplifier. It also recommends amplifiers that will make the overall solution cost/performance competitive with monolithic instrument amplifiers.
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
Input Filter Prevents Instrumentation-amp RF-Rectification Errors
by Charles Kitchin, Lew Counts, and Moshe Gerstenhaber, Analog Devices, Inc. (EDN, 11/13/2003)
Technical Articles HTML
The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers  (pdf, 582 kB) Technical Articles PDF
Applying Instrumentation Amplifiers Effectively: The Importance of an Input Ground Return  (pdf, 508 kB) Technical Documentation PDF
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
In-Amp Error Calculator
These tools will help estimate error contributions in your instrumentation amplifier circuit. It uses input parameters such as temperature, gain, voltage input, and source impedance to determine the errors that can contribute to your overall design.
Design Calculators HTML
AD624 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.

SampleSample & Buy

Price, packaging, availability

AD624 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD624ACHIPS Status: Production CHIPS OR DIE 0 Ind Tray, 88 - - Y  Material Info Notify Me Contact ADI
AD624ADZ Status: Production 16 ld Side-Brazed CerDip 16 Ind Tube, 23 $24.45 $22.10 Y  Material Info PCN Purchase
AD624BDZ Status: Production 16 ld Side-Brazed CerDip 16 Ind Tube, 23 $32.04 $28.96 Y  Material Info PCN Purchase
AD624CDZ Status: Production 16 ld Side-Brazed CerDip 16 Ind Tube, 23 $45.91 $41.50 Y  Material Info PCN Purchase
AD624SCHIPS Status: Production CHIPS OR DIE 0 Mil Tray, 88 - - Y  Material Info Notify Me Contact ADI
AD624SD Status: Production 16 ld Side-Brazed CerDip 16 Mil Tube, 23 $50.04 $45.24 N  Material Info PCN Purchase
AD624SD/883B Status: Production 16 ld Side-Brazed CerDip 16 Mil Tube, 23 $64.92 $58.66 N  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.


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