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ADS1000: input operating freq of 600KHz

Part Number: ADS1000
Other Parts Discussed in Thread: ADS7047

Hello, could you help to check if ADS1000 can work with 600Khz input signal? thanks.

Application: VFD/Motor Inverter

  • Brian,


    The ADS1000 is not designed to work with an input signal that has a bandwidth of 600kHz.

    This ADC is basically a Delta-Sigma type ADC with a modulator that runs at 275kHz. However, the maximum output data rate is 128SPS which is much slower. While the input is sampled at a much higher rate, the output data rate is extremely slow in comparison. There is no sample-and-hold type capability, and you would get no usable data out of the device with an input signal that fast.

    Generally, for an input that has bandwidth of 600kHz, you would want a SAR type ADC. Those devices have a much faster output data rate.


    Joseph Wu
  • Thanks! Could you recommand a part with 1Ch to meet this inquiry? Thanks!

  • Joseph ,
    Another feature, AD converter interface requirement is SPI protocol ,thank.
  • All,


    I generally support the high resolution, lower data rate devices in the Precision Data Converters forum. However, if you need a single channel device, with about 12 bits of resolution, a fully differential input, SPI communication, and the capability of sampling signals near 600kHz, you'll want something like the ADS7047. This device should be able to handle a throughput of 3MSPS. If you look at Table 1 of the datasheet, there are a few devices in the family, and you should be able to select on that is close to your needs.

    I'll point post this out to the applications engineers that support those devices. If they have a different suggestion, they will be able to post back.


    Joseph Wu