Datasheet

Data Sheet AD5504
Rev. B | Page 17 of 20
Table 10. Control Register Functions
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
1
R/
W
1 1 1 0 0 0 0 0 C6 C5 C4 C3 C2 C1 C0
1
Read-only bit. This bit should be 0 when writing to the control register.
Table 11. Control Register Function Bit Descriptions
Bit No. Bit Name Description
DB0
C0
C0 = 0: the device is not in thermal shutdown mode.
C0 = 1: the device is in thermal shutdown mode.
DB1 C1 C1 = 0: reserved. This bit should be 0 when writing to the control register.
DB2 C2
1
C2 = 0: DAC Channel A power-down (default).
C2 = 1: DAC Channel A power-up.
DB3 C3
1
C3 = 0: DAC Channel B power-down (default).
C3 = 1: DAC Channel B power-up.
DB4 C4
1
C4 = 0: DAC Channel C power-down (default).
C4 = 1: DAC Channel C power-up.
DB5 C5
1
C5 = 0: DAC Channel D power-down (default).
C5 = 1: DAC Channel D power-up.
DB6 C6 C6 = 0: outputs connected to AGND through a 20 kΩ resistor (default).
C6 = 1: outputs are three-stated.
1
If Bit C2 to Bit C5 are set to 0, the part is placed in power-down mode.
07994-120
WRITE N WRITE N + 1
WRITE TO
CONTROL REGISTER
NOP
WRITE TO
CONTROL REGISTER
WRITE TO
DAC REGISTER
WRITE N + 2
WRITE TO
CONTROL REGISTER
WRITE TO
CONTROL REGISTER
NOP
WRITE TO
CONTROL REGISTER
WRITE TO
CONTROL REGISTER
WRITE TO
DAC REGISTER
Figure 18. Control Register Write Sequences