After the power and jumper configurations are set up per Figure 3-1 or Figure 3-2 , and the DAC814xxEVM GUI is fully installed, connect the USB cable from the DAC81401EVM USB port to the local machine. Figure 3-3 displays the system hardware setup.

Figure 3-3 DAC81401EVM Hardware Setup

Once all the connection is done, power up the DAC81401EVM hardware as described in the power requirement section 3-1.

For basic DAC81401 device check, use one of the following sequences in the DAC814xxEVM GUI:

• From DAC81401 Register page

  • Write 0x0A24 to the SPI_CONFIG (0x03) register to power up the device

  • Write 0x0000 to the GEN_CONFIG (0x04) register to power up the internal reference

  • Write 0x0000 to the DAC_PWDWN (0x09) register to power up the DAC output

  • Write 0x7FFF to the DAC (0x10) register to configure the DAC_OUT to 2.5-V on DAC_OUT (TP4) or 10 V on TP18 (pin-1) while high voltage gain stage is active

• From DAC81401 High Level page

  • Device Power Down: select Active mode to power up the device

  • Reference Power-Down: select Activate internal ref to power up the internal reference

  • DAC Channel Power-Down: select Activate channel to power up the DAC output

  • DAC_DATA: write 0x7FFF to get 2.5-V on DAC_OUT (TP4) or 10 V on TP18 (pin-1) while high voltage gain stage is active

The default voltage range for the DAC81401 is 0 V to 5 V. Configure the voltage range by modifying the "DAC Voltage Range" control on DAC814xxEVM GUI High Level page, or by writing to the "DAC_RANGE" register in the Low Level page as shown in section 2-2.