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DAC61416: Voltage output problem

chaogang.zhu
Prodigy 50 points
Part Number: DAC61416

Hello：

I tried to output a voltage of 0 to 20V with DAC61416. I used MC9S12 microcontroller to communicate with DAC61416 via SPI.When I select the output range is -5 V to +5 V 、 -10 V to +10V、-20 V to +20V or -2.5 V to +2.5 V ,the output voltage is only 1.4V. When I select the output range is 0V to +5V 、 0V to +10V 、0V to +20V or 0V to +40V ,the output voltage is 0v. I am sure there is no problem with SPI communication.

This is the register configuration：

DrvDacWriteReg(DACRANGE2R_ADDR, 0x2222);
 DrvDacWriteReg(DACRANGE3R_ADDR, 0x2222);
 DrvDacWriteReg(SPICFGR_ADDR, 0x0A84);
 DrvDacWriteReg(GENCFGR_ADDR, 0x3F00);
 DrvDacWriteReg(DACPWDWNR_ADDR, 0x0000);
 DrvDacWriteReg(BRDCFGR_ADDR, 0xFFFF);
 DrvDacWriteReg(BRDCASTR_ADDR, 0xFFFF);

Please let me know why this problem occurs or if you can help me directly with this, it would be a great help.

Thanks and Regards,

chaogang zhu