Current source not working in AD7792

Posted on Feb 5, 2014

The serial interface is working fine (Read the ID register correctly) but for some reason the on-chip current sources doesn`t seem to work. I have connected 470E resistor on IOUT1 and have configured the IO register (Value 0x03) so that 1mA is sourced on both IOUT1 & IOUT2. I`m expecting to see 470 mV across the resistor, but I`m getting 33mV. I h

Current source not working in AD7792
Click here to download the full size of the above Circuit.

ave tried making 2 of such boards to rule out possibility of bad chip or bad soldering,

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