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Connect two ADS1258

Agnibha Mukhopadhyay
Prodigy 40 points
Other Parts Discussed in Thread: ADS1258

How can I connect two ADS1258 without sharing the SPI. Is there any way to connect it on daisy chain mode? Please let me know.

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    TI__Mastermind 44680 points

    Hi Agnibha,

    Welcome to the TI E2E Forums!

    The ADS1258 does not support a daisy-chain mode like our ADS127x devices. Sharing an SPI bus, or using multiple SPI peripherals would be the only methods to connect two ADS1258 devices.

    What is the motivation for using a daisy-chain mode?

    In terms of the number of digital signals required, you would only be saving one GPIO pin for daisy-chain mode.

    There are some tricks you can play with SPI to reduce the number of pins required. For example, with only two devices you could invert the /CS signal going to the second device - you would always have an active device using this method.

    Best Regards,
    Chris