Hi Bruce, [quote userid="604788" url="~/support/data-converters-group/data-converters/f/data-converters-forum/1435994/amc130m02-amc130m02-configuration"]Should there always be a voltage (we measured ~2.6V) on the DCDC_CAP pin regardless of configuration state?[/quote] There should be a voltage on the DCDC_CAP pin if DVDD is powered since the DCDC_CAP is connected to the output of the primary side LDO. [quote userid="604788" url="~/support/data-converters-group/data-converters/f/data-converters-forum/1435994/amc130m02-amc130m02-configuration"]With the DRDY~ pin tied high with a 100kohm resistor (as was done in the datasheet example and on the AMC131M03EVM) how should we determine when the device is ready for communication after a POR or reset?[/quote] What mode are you using the DRDY pin in. On startup the DRDY pin is push-pull, which doesn't require the 100kOhm pullup [quote userid="604788" url="~/support/data-converters-group/data-converters/f/data-converters-forum/1435994/amc130m02-amc130m02-configuration"]I did not notice in the datasheet any required long wait periods for communicating after POR or reset, but the AMC131M03EVM waits 1s between each communication after reset, taking 4s until the DRDY~ pulses start. Do we also have to wait ~1s after any kind of reset to establish communication with the AMC130M02?[/quote] The wait time after a reset event should be t POR , which is typically 250us. After waiting that time you should be able to communicate with the device. Could you send a schematic and data captures of your communication attempts with the device? Thanks.
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