Other Parts Discussed in Thread: DAC7750, DAC8750
Hi,
We're using DAC7750 at PCB DAC7750EVM - http://www.ti.com/lit/ug/sbau205a/sbau205a.pdf.
First test we are using the EVM software. We just config the output range to 4-20mA and enable the output.
Acording to DAC7750EVM document, section 3.6.7, we need measure the drop voltage on R4 of 300ohms. The JP6 must be connect.
After enable the "Output Enable" button, we get a FAULT (bit 2 - Iout fault) on status register.
The drop voltage of R4 is 1.13V, the 4mA that was select. Power supply is 22.5V.
Whatever I write on DAC Register, the current output not change.
The FAULT ALARM goes to zero after reset or disable the Output Enable bit.
Please, what am I doing wrong?
Thank you!