DAC53701 datasheet(46/59 Pages) TI2

46 / 59 page

The pseudocode for getting started with a power-supply control application is as follows:

//SYNTAX: WRITE <REGISTER NAME (Hex code)>, <MSB DATA>, <LSB DATA>

//Write DAC code (12-bit aligned) for nominal output

//For a 1.8-V output range, the 10-bit hex code for 0.6 V is 0x0155. With 12-bit alignment, it

becomes 0x0554

WRITE DAC_DATA(0x21), 0x05, 0x54

//Write DAC code (12-bit aligned) for margin-low output at the power supply

//For a 1.8-V output range, the 10-bit hex code for 1.164 V is 0x0296. With 12-bit alignment, it

becomes 0x0A58

WRITE DAC_MARGIN_HIGH(0x25), 0x0A, 0x58

//Write DAC code (12-bit aligned) for margin-high output at the power supply

//For a 1.8-V output range, the 10-bit hex code for 36 mV is 0x14. With 12-bit alignment, it becomes

0x50

WRITE DAC_MARGIN_LOW(0x26), 0x00, 0x50

//Power-up the device with enable internal reference with 1.5x output span. This will output the

nominal voltage (0.6 V)

//CODE_STEP: 2 LSB, SLEW_RATE: 25.6 µs

WRITE GENERAL_CONFIG(0xD1), 0x12, 0x14

//Trigger margin-low output at the power supply

WRITE TRIGGER(0xD3), 0x00, 0x80

//Trigger margin-high output at the power supply

WRITE TRIGGER(0xD3), 0x00, 0x40

//Write back DAC code (12-bit aligned) for nominal output

WRITE DAC_DATA(0x21), 0x05, 0x54

9.2.2.3 Application Curves

Figure 9-5. Power-Supply Margin High

Figure 9-6. Power Supply Margin Low

DAC53701, DAC43701

SLASEY5 – DECEMBER 2020

www.ti.com

Submit Document Feedback

Product Folder Links: DAC53701 DAC43701

DAC53701 Datasheet(PDF) 46 Page - Texas Instruments