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ADS8363: Regarding the ADC to be used with the AMC3330 output

Part Number: ADS8363
Other Parts Discussed in Thread: AMC3330, ADS1119, ADS1120, ADS112C04,

Hi team,

My customer is designing an insulation resistance measurement circuit based on the TIDA‑010232 reference design. They would like to route the AMC3330 output through a 16‑bit ADC and then into the CPU.

The current requirements are as follows:

  • Number of required channels: 4

  • Sampling rate: not high; an update interval of about once every 30 seconds is sufficient

  • Sampling method: whichever offers the best balance of design simplicity, cost, and performance

  • Interface: no specific requirement

Considering cost as well, I have proposed devices such as the ADS1119, ADS1120, and ADS112C04.

Although the AMC3330 data sheet lists the ADS8363 as a reference ADC, my understanding is that for this application—where neither high‑speed response nor simultaneous sampling is required—a delta‑sigma ADC should also be acceptable instead of a SAR ADC. If there are any other recommended ADCs, I would appreciate your suggestions.

Best regards,

Kyohei

  • Hello Kyohei,

    Given the requirements the ADS1119 is a good option to consider. The ADS1120 and ADS112C04 are also good options, but we see a lot of interest with those devices in for measuring temperature through RTDs and thermocouples. We do also have the ADS1118 which is similar to the ADS1119, but it is a SPI interface instead of I2C.

    Regards,

    Josh