I am using the AD7291 8-channel ADC on a 100kHz I2C bus, single master beaglebone black. It is one of 5 data acquisition chips on the bus. Another one is the ADXL354 mems accelerometer.
They all are working perfectly except for the AD7291 which intermittently caused a bus controller timeout and eventually bus arbitration error because it appears to be holding down the SDA line.
I have tried everything to address this including adjusting the pull up resistors, slowing down the bus clock, speeding up the bus clock.
I have tried reading the adcs one at a time and with a 16byte read of them all.
Can you provide any suggestions to what may be causing this issue. My decoupling and power is a duplicate of that shown in your evaluation board in the 7291 Users Guide.
[edited by: @skowalik at 12:43 AM (GMT 0) on 6 Mar 2020]