Datasheet

MAX5222
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
_______________________________________________________________________________________ 9
DIN
SCLK
CS
UB1 UB2 UB3 SB SA UB4 LB LA D7 D6 D5 D4 D3 D2 D1 D0
OPTIONAL
(CONTROL BYTE) (DATA BYTE)
INSTRUCTION
EXECUTED
Figure 2. 3-Wire Serial-Interface Timing Diagram
Table 2. Serial-Interface Programming Commands
Table 3. Example of a 16-Bit Input Word
X = Don’t care.
* = Not shown, for the sake of clarity. The functions of loading and shutting down the DACs and programming the logic can be combined in a single
command.
X X 1 0 0 0 1 1 1 0 0 0 0 0 0 0
UB1 UB2 UB3 SB SA UB4 LB LA B7 B6 B5 B4 B3 B2 B1 B0
LOADED LOADED
IN FIRST IN LAST
DATA
UB1
UB2 UB3 SB SA UB4 LB
LA
B7
MSB
B4 B3 B2 B1
B0
LSB
FUNCTION
X X 1
* *
0 0 0 X
X X X X X X
X No Operation to DAC Registers
*
Unassigned Command
*
8-Bit DAC Data Load Register to DAC B
*
8-Bit DAC Data Load Register to DAC A
*
8-Bit DAC Data Load Both DAC Registers
X X 1 0 0 0
* *
X
X X X X X X X
All DACs Active
X X 1 0 0 0
* *
X X X X X X X X Unassigned Command
X X 1 1 0 0
* *
X X X X X X X X Shut Down
X X 1 0 1 0
* *
X X X X X X X X Shut Down
X X 1 1 1 0
* *
X X X X X X X X Shut Down
B5B6
1
0
0
1
00
1
0
*
0
X X
X X
X
1
1
*
0X
1X X 0
*
1
1
*
CONTROL