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ADS1x7xEVM-PDK's analog input voltage scale

Yixi Song
Intellectual 355 points
Other Parts Discussed in Thread: ADS1271, OPA1632, ADS1174, ADS1274, ADS1278, ADS1178, THS4521

I got the information from "ADS1271EVM User's Guide (Rev. B) ",that this 1271 kit has an amplifier OPA1632 and can afford analog input range covering -10V~10V.But I got the information from "ADS1x7xEVM-PDK User's Guide(SBAU197�February 2012)",that 1x7xEVM-PDK kit has no OPA1632 amplifier.Would you tell me which type(s) in ADS1271,1274,1278 EVM-PDK kits has(have) OPA1632 amplifiers and can receive analog input voltage ( -10V~10V)? Thanks.

  • 0
    TI__Mastermind 23235 points

    Yixi -

    The ADS1x7xEVM only covers the ADS1278, ADS1274, ADS1178, and ADS1174 devices.  It does not include the ADS1271 device.

    As you note, the ADS1271 has the OPA1632 as an input buffer and can accept the +/- 10V input if you have the proper supply voltage connected to the EVM.  The ADS1x7xEVM uses a THS4521 as an input buffer and cannot handle the high voltage bipolar inputs.