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Frequent questions

  • [FAQ] ADC128S102-SEP: Can I apply input signals before the analog supply (Va)

    Part Number: ADC128S102-SEP Other Parts Discussed in Thread: ADC128S102 Hello, We have an application where the analog inputs are active before the power up of the analog supply (Va) is complete. What are the implications of this condition and how can…

  • [FAQ] ADC128S102-SEP: Power on / off (up / down) sequencing requirements

    Part Number: ADC128S102-SEP In the datasheet, it is mentioned that analog power rail should ramp before digital power rail during power up. What about during power down? Is there guidance about proper sequencing? Should digital power rail ramp down…

  • [FAQ] ADS7953: Using GPIO2 and Mode Control Register to select the input range

    Part Number: ADS7953 Hello, I am using the ADS7953 and have a question regarding the use of GPIO2 to control the input range. The input range can be selected via GPIO2 or bit DI06 in the mode control registers. What happens if GPIO2 is used to select…

  • [FAQ] TLA2518: Channel 0 does not work properly as a GPIO

    Part Number: TLA2518 Other Parts Discussed in Thread: ADS7038 , ADS7028 When configuring Channel 0 as a GPIO, the pin does not function as expected. When configured as a GPIO push pull, the pin is always high; and when GPIO0 is configured as an open…

  • [FAQ] Have a question about ADCs? Click here for FAQs, resources, and more!

    Other Parts Discussed in Thread: ADS1209 , ADS124S08 New users to E2E If you are new to the support forum, please take some time to read the E2E community guidelines and tasks specifically related to E2E and resource guides listed below: Search…

  • [FAQ] ADS131A04: READY response word

    Part Number: ADS131A04 Other Parts Discussed in Thread: ADS131A02 The data sheet for ADS131A0x states that the device responds with the READY word after reset: 0xFF02 for ADS131A02 and 0xFF04 for ADS131A04. However, if I send multiple NULL command frames…

  • [FAQ] Can my ADC measure negative voltages?

    Other Parts Discussed in Thread: ADS1256 , ADS124S08 , ADS8688 , ADS131M08 My ADC’s datasheet gives the input range as ±VREF. Does that mean I can measure negative voltages with respect to ground?

  • [FAQ] How do I program the NVM of a smart DAC or AFE in production?

    Other Parts Discussed in Thread: DAC43401-Q1 , DAC43401 , DAC53401-Q1 , DAC53401 , DAC53701 , DAC43701 , DAC53701-Q1 , DAC43701-Q1 , DAC63204 , DAC53204 , DAC43204 , DAC63004 , DAC53004 , AFE539A4 I have used a smart DAC in my design and there is no on…

  • [FAQ] ADS7953: I cannot communicate with the ADS795x, how do I program the device?

    Part Number: ADS7953 I am having trouble programming the ADS7953, part of the ADS795x family of devices. How do you communicate to the device?

  • [FAQ] ADS8681: Solution for detecting input floating on SAR ADCs - ADS8681/ADS8688/ADS8686/ADS8588S

    Part Number: ADS8681 Other Parts Discussed in Thread: ADS8699 , ADS8685 , ADS8665 , ADS8661 , ADS8689 , ADS8691 , ADS8675 , ADS8695 , ADS8671 , ADS8684A , ADS8664 , ADS8688A , ADS8698 , ADS8688AT , ADS8688 , ADS8678 , ADS8674 , ADS8684 , ADS8694 , ADS8668…

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