Datasheet

Data Sheet AD9780/AD9781/AD9783
Rev. B | Page 23 of 32
Register Address Bit Name Function
AUXDAC1 0x0D 7:0 AUXDAC1[9:0] AUXDAC1 output current adjustment word.
0x0E 1:0 0x3FF, sets AUXDAC1 output current to 2.0 mA.
0x200, sets AUXDAC1 output current to 1.0 mA.
0x000, sets AUXDAC1 output current to 0.0 mA.
0x0E 7 AUX1SGN 0, AUX1P output pin is active.
1, AUX1N output pin is active.
6 AUX1DIR 0, configures AUXDAC1 output to source current.
1, configures AUXDAC1 output to sink current.
DAC2 FSC 0x0F 7:0 DAC2FSC[9:0] DAC2 full-scale 10-bit adjustment word.
0x10 1:0 0x3FF, sets DAC full-scale output current to the maximum value of 31.66 mA.
0x200, sets DAC full-scale output current to the nominal value of 20.0 mA.
0x000, sets DAC full-scale output current to the minimum value of 8.66 mA.
AUXDAC2 0x11 7:0 AUXDAC2[9:0] AUXDAC2 output current adjustment word.
0x12 1:0 0x3FF, sets AUXDAC2 output current to 2.0 mA.
0x200, sets AUXDAC2 output current to 1.0 mA.
0x000, sets AUXDAC2 output current to 0.0 mA.
0x12 7 AUX2SGN 0, AUX2P output pin is active.
1, AUX2N output pin is active.
6 AUX2DIR 0, configures AUXDAC2 output to source current.
1, configures AUXDAC2 output to sink current.
BIST Control 0x1A 7 BISTEN 1, enables and starts built-in self-test.
6 BISTRD 1, transfers BIST result registers to SPI for readback.
5 BISTCLR 1, reset BIST logic and clear BIST result registers.
BIST Result 1 0x1B 7:0 BISTRES1[15:0] 16-bit result generated by BIST 1.
0x1C 7:0
BIST Result 2 0x1D 7:0 BISTRES2[15:0] 16-bit result generated by BIST 2.
0x1E 7:0
Hardware Version 0x1F 7:4 VERSION[3:0] Read only register; indicates the version of the chip.
3:0 DEVICE[3:0] Read only register; indicates the device type.