Connect with us

AD624AD alternative wanted.

Discussion in 'General Electronics Discussion' started by bigone5500, Feb 20, 2015.

Scroll to continue with content
  1. bigone5500

    bigone5500

    712
    120
    Apr 9, 2014
    Is there a cheaper alternative? I am trying to build an ECG monitor.
     
    Last edited: Feb 21, 2015
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,313
    2,593
    Nov 17, 2011
    The AD624 is a precision instrumentation amplifier. You wil find a few similar parts when you look on the websites of the usual suspects (Analog Devices, Texas Instruments, Linear Technology to name but a few).

    No other amplifier will be an exact second source for the AD624. Some parameters will always differ. You will have to know, for your application, which are the relevant parameters and which ones can be relaxed. Only then will you be able to find a replacement - not necessarily a less expensive one.

    You will also have to verify the performance of the circuit with another amplifier rather thorouhgly.
     
  3. bigone5500

    bigone5500

    712
    120
    Apr 9, 2014
    Thanks harald. I will probably go ahead and get the AD624AD anyway.
     
  4. bigone5500

    bigone5500

    712
    120
    Apr 9, 2014
  5. Harald Kapp

    Harald Kapp Moderator Moderator

    11,313
    2,593
    Nov 17, 2011
    The AD624 is an instrumentation amplifier, the LM324 is an operational amplifier. These are different kinds of amplifier. You can build your own instrumentation amplifier from 3 operational amplifiers, but you will be hard pressed to achieve the accuracy that comes with an integrated instrumentaion amplifier that has been tuned and tested in the factory.
     
  6. mofy

    mofy

    46
    14
    Dec 19, 2014
    The AD624 is probably worth the money because of the integrated resistors, boosts the CMRR a lot!
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-