Add to Signal Chain Designer

AD204:  Low Cost, Miniature Isolation Amplifier powered by external clock

Product Details

The AD204 is a general purpose, two-port, transformer-coupled isolation amplifier that may be used in a broad range of applications where input signals must be measured, processed and/or transmitted without a galvanic connection. This industry standard isolation amplifier offers a complete isolation function, with both signal and power isolation provided for in a single compact plastic SIP or DIP style package. The AD204 is powered by an externally supplied clock, such as the recommended AD246 Clock Driver.

The AD204 provides total galvanic isolation between the input and output stages of the isolation amplifier through the use of internal transformer-coupling. The functionally complete AD204 eliminates the need for an external, user-supplied dc/dc converter. This permits the designer to minimize the necessary circuit overhead and consequently reduce the overall design and component costs.

The design of the AD204 emphasizes maximum flexibility and ease of use, including the availability of an uncommitted op amp on the input stage. It features a bipolar ±5 V output range, an adjustable gain range of from 1 to 100 V/V, ±0.025% max nonlinearity (K grade), 130 dB of CMR and consumes a low 35 mW of power.


  • Multichannel Data Acquisition
  • Current Shunt Measurements
  • Motor Controls
  • Process Signal Isolation
  • High Voltage Instrumentation Amplifier


  • Small Size: 4 Channels/Inch
  • Low Power; 35 mW
  • High Accuracy: ±0.025% Max Nonlinearity (K Grades)
  • High CMR: 130 dB (Gain = 100 V/V)
  • Wide Bandwidth: 5 kHz Full-Power
  • High CMV Isolation: ±2000 V pk Continuous
    (K Grade) (Signal and Power)
  • Isolated Power Outputs
  • Uncommitted Input Amplifier

Functional Block Diagram for AD204

Of Note ...

For information on the referenced Clock Driver, please visit the AD246 product page.


Title Content Type File Type
AD202/AD204: Low Cost, Miniature Isolation Amplifiers Powered by an Externally Supplied Clock Data Sheet  (Rev D, 10/2002) (pdf, 928 kB) Data Sheets PDF
AN-214: Ground Rules for High Speed Circuits  (pdf, 356 kB)
Layout and Wiring Are Critical in Video Converter Circuits.
Application Notes PDF
Finding the Needle in a Haystack: Measuring small differential voltages in the presence of large common-mode voltages
(Analog Dialogue, Vol. 34, No. 1, January-February, 2000)
Analog Dialogue HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary 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

AD204 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD204JN Status: Production 10 ld PDIP (for AD202/204) 10 Ind Tube, 9 $27.63 $27.09 N  Material Info PCN Purchase
AD204JY Status: Production 10 pin SIP (AD204) 10 Ind Tube, 9 $27.63 $27.09 N  Material Info PCN Purchase
AD204KN Status: Production 10 ld PDIP (for AD202/204) 10 Ind Tube, 9 $32.06 $30.95 N  Material Info PCN Purchase
AD204KY Status: Production 10 pin SIP (AD204) 10 Ind Tube, 9 $32.06 $30.95 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.

content here.
content here.

Review this Product