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Original question:

ADS124S08: ADS124S08 VS AD7124-8

ADS124S08: Single-End and Gain adjustment

Brian Wang0928
Genius 14030 points
Part Number: ADS124S08
Other Parts Discussed in Thread: ADS1220

In my customer application, the inputs with single-end topology are needed. and When single-end inputs, the gain needs to be adjusted. It seems that ADS124S08 couldn't support this application, right? Any other recommendation? Very thanks. 

Application: Motion Controller with AI (6ch) 4-20mA x3ch & RT100/1000 x3ch,

  • 0
    TI__Guru** 113765 points

    Hi Brian,

    Unfortunately only a gain of 1 is available for the ADS124S08 when bypassing the PGA.  Is this for the current measurement?  If so, it should be possible to level shift (bias) up the measurement within the measurement range of the PGA.  How much gain is required?  Another option would be to use bipolar analog supplies which would allow the PGA to be enabled.

    The ADS1220 allows for a gain up to 4 with a single-ended input and the PGA bypassed.  However, this would require multiple devices.

    Best regards,

    Bob B