Part Number: DAC8775
My customer used DAC8775 and found REFOUT abnormal, Enable REFOUT but the PIN output only 1.2V, Source 5V to REFIN will bring down system power supply voltage. SPI bus read and write operation works okay. the SPI code configuration is as below, the customer want to know whether the hardware or software fault.
SPIWrite(0x01, 0x0001);//Software Reset
SPIWrite(0x02, 0x0012);//Enable Reference, Power-off Condition, change to High-Z for VOUT and IOUT
SPIWrite(0x03, 0x0020);//Select DAC Channel A
SPIWrite(0x04, 0x000F);// set for 4 to 20mA range
SPIWrite(0x04, 0x100F);//Enable output
SPIWrite(0x05, 0x8000);//Write DAC Data Register value to mid-scale
