AD5666 Datasheet, PDF (26/28 Pages) Analog Devices – Quad, 16-Bit DAC with 5 ppm/C On-Chip Reference in 14-Lead TSSOP

AD5666
Table 13. Clear Code Register
Clear Code Register
DB1
DB0
CR1
CR0
0
0
0
1
1
0
1
1
Clears to Code
0x0000
0x8000
0xFFFF
No operation
Table 14. 32-Bit Input Shift Register Contents for Clear Code Function
MSB
DB31 to DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20
X
0
1
0
1
X
X
X
X
Don’t cares
Command bits (C3 to C0)
Address bits (A3 to A0)
DB19 to DB2
X
Don’t cares
LSB
DB1
DB0
1/0
1/0
Clear code register
(CR1 to CR0)
Table 15. LDAC Overwrite Definition
Load DAC Register
LDAC Bits (DB3 to DB0) LDAC Pin
0
1/0
1
X—don’t care
LDAC Operation
Determined by LDAC pin
DAC channels update, overrides the LDAC pin. DAC channels see LDAC as 0.
Table 16. 32-Bit Input Shift Register Contents for LDAC Overwrite Function
MSB
DB31
to
DB28
DB27
DB26
DB25
DB24
DB23
DB22
DB21
DB20
X
0
1
1
0
X
X
X
X
Don’t
cares
Command bits (C3 to C0)
Address bits (A3 to A0)—
don’t cares
DB19
to
DB4
X
Don’t
cares
LSB
DB3
DB2
DB1
DB0
DAC D
DAC C
DAC B
DAC A
Setting LDAC bit to 1 override LDAC pin
Rev. A | Page 26 of 28