PGA300, 4 to 20 mA mode, DAC Code Calibration:
When read and write DAC code
1) when 4 mA, reading was always very close to 4 mA
2) when 12 mA, reading was always very close to 12 mA
3) when 20 mA, sometime reading in amp meter was around 16 mA, even 5 mA. Recently this happened to one system with PGA300EVM-034. when tried later, some PGA300 can go back around 20 mA, some never made it.
Please help.