Other Parts Discussed in Thread: LM2841
Dear :
i use DAC161S997 as a converter , transfer SPI data to 4-20mA. now it can work. but I found one issue, in order to describe it exactly,let me separate power on device with 2 different steps.
step 1: connect loop + and loop - with power adapter. step2: connect adapt to power.
if follow step1first, then step2. it is ok, anything runs smoothly, if reverse 2 steps, step2 first, then step1.DAC output will change, such as 12mA or any other number, normally, DAC should give 4mA at zero input . after change DAC , output back to normal, 2 pcs DACs and 1 triode have failed like this . can i know what's the reason? how should i do when i use DAC?