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Differences between ADS8555 and ADS8556

Binu Raghavan
Prodigy 100 points
Other Parts Discussed in Thread: ADS8555, ADS8556

Hi,

Can any one explain the major differences between ADS8555 and ADS8556?

The obvious differences as per the datasheet are:

1. Maxim data rate with external conversion clock and reference in serial mode is 530 kSPS in ADS8556 and 500kSPS in ADS8555.

 

2. The ADS8556 has a partial power-down mode where as the ADS8555 does not have this feature. In partial power-down mode, each of the three channel pairs of the ADS8556 can be individually put into a power-saving condition that reduces the current requirement to 2mA per channel pair.

Looks like the ADS8555 is a new device as the datasheet is dated as of 2011. I am slightly confused as to which one to pick up, considering all the major features like precision, SNR, THD are all similar.

Any feedback much appreciated.

Thanks

Binu Raghavan

 

  • 0
    TI__Guru 55466 points

    Hello Binu,

    The only difference between the ADS8555 and ADS8556 is the partial power-down mode is available on the ADS8556; otherwise, essentially the ADS8555 and ADS8556 is the same identical device. Both of them offer data rates 630kSPS in parallel mode or 450kSPS in Serial mode. 

    Please let me know if you need more information,

    Thank you and Regards,

    Luis

  • 0 in reply to Luis Chioye
    Prodigy 200 points

    Hello Luis,

    Based on Sample Availability the ADS8556 seems to be a more popular device.

    Since I don't really care about partial power down I want to select the part with the best volume and availability.

    Thanks, Al...