OK. I have two boards with DAC161S997 . One of them has its own MCU( msp432p401R ) other one is just for DAC and connects to msp-exp432p4111 with jumpers. Codes are the same. Designs are the same but the one with the MCU still cant set the output less then 5.5mA. But it can be 20mA perfectly. using Setup_DAC161 (DAC161_STD_ERR_CONFIG_MASKED, 3375, 21750); as you said 0 is not valid.
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