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ADS7253: >1MSPS, 4ch/8ch simultaneous-sampling ADC

Part Number: ADS7253
Other Parts Discussed in Thread: ADS9234R

HI Team, 

Do we have 4ch/8ch simultaneous sampling ADC(>1MSPS)? I see the ADS7253 only have dual simultaneous sampling. But we need more  simultaneous sampling channels. Thanks. 

  • Hello Hollis,

    Thank you for your post.

    How many simultaneous sampling channels do you require and how many total do you need to measure?

    We won't be able to find a SAR ADC device with 4 or more simultaneous sampling channels. It is possible to synchronize multiple devices together, for example 2 or 4 ADS7253s. 

    If delta-sigma architecture is an option, we have many devices which support 4-8 simultaneous channels, but the 16-/24-bit resolution may be overkill.


  • Hi Ryan, 

    thanks for reply. 

    do we have >1MSPS sample rate and delta-sigma architecture devices which support 4-8 simultaneous channels? If yes, please help to recommend. Thanks. 

  • Hi Hollis,

    These delta-sigma ADCs which support 4/8 simultaneous sampling channels cannot sample > 1 MSPS. Sorry for the confusion. 

    If the sampling rate is a fixed requirement, then the customer will need to synchronize multiple SAR ADCs by sharing a common /CS.

    To reduce the component count, they can consider a 2-channel simultaneous SAR ADC like the ADS9234R. This device samples up to 3 MSPS with 14-bit resolution. 2-4 devices could then be synchronized together with a common /CS. The data from each device can be read on a single SDO pin (SDOA) or on multiple SDO pins in parallel to reduce SCLK speed. SDO connections could be shared if each device uses it's own /CS.



  • Thanks Ryan. we are promoting the 8353-Q1 as customer wants Q1 grade.