Rainbow Electronics MAX5295 - Manual (Page 18)

MAX5290–MAX5295
Buffered, Fast-Settling, Dual, 12-/10-/8-Bit,
Voltage-Output DACs
18 ______________________________________________________________________________________
CONTROL BITS
DATA BITS
DATA
C3
C2
C1
C0
D1
D1
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
LOADING INPUT AND DAC REGISTERS A AND B
DIN
0
0
0
0
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load input register A from shift register; DAC registers are unchanged. DAC outputs are unchanged.*
DIN
0
0
0
1
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load DAC register A from shift register; input registers are unchanged. DAC outputs are updated.*
DIN
0
0
1
0
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load input register A and DAC register A from shift register. DAC outputs are updated
.*
DIN
0
0
1
1
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load input register B; DAC registers are unchanged. DAC outputs are unchanged
.*
DIN
0
1
0
0
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load DAC register B from shift register; input registers are unchanged. DAC outputs are updated.*
DIN
0
1
0
1
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load input register B and DAC register B from shift register. DAC outputs are updated
.*
DIN
0
1
1
0
X
X
X
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
0
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
0
0
0
X
X
X
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
0
0
1
X
X
X
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
0
1
0
X
X
X
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
0
1
1
X
X
X
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
1
0
0
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load all input registers from the shift register; all DAC registers are unchanged. All DAC outputs are unchanged.*
DIN
1
1
0
1
D11
D10
D9
D8
D7
D6
D5
D4
D3/0
D2/0
D1/0
D0/0
Load all input and DAC registers from shift register. DAC outputs are updated.*
Table 2a. DAC Programming Commands
X = Don’t care. *For the MAX5292/MAX5293 (10-bit version), D11–D2 are the significant bits and D1 and D0 are sub-bits. For the MAX5294/MAX5295 (
8-bit version),
D11–D4 are the significant bits and D3–D0 are sub-bits. Set all sub-bits to zero during the write commands.