ADS1251: Sharing I2C bus with other devices

Justin Reina89

Part Number: ADS1251
Other Parts Discussed in Thread: SN74LVC2G125

We would like to share the comm connection to the ADS1251U/2K5, is this possible? Are DOUT/CLK compatible with I2C and other devices on the same bus?

over 5 years ago

0 Bob Benjamin over 5 years ago

TI__Guru** 113765 points

Hi Justin,

The ADS1251 is SPI and not I2C. If you want to use the ADS1251 with other SPI devices, there is no CS so you would need to use some form of logic such as the SN74LVC2G125 to break the connection from the bus when not accessing the ADS1251. You could create a CS by using a GPIO to control the logic gate outputs.

Best regards,

Bob B

0 Justin Reina89 over 5 years ago in reply to Bob Benjamin

Expert 2195 points

Thanks Bob! Was sneaking in for confirmation, my team was consideration I2C integration for use :)

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ADS1251: Sharing I2C bus with other devices