Datasheet
MAX5115/MAX5116
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial
Interface
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Mute drives the selected DAC output to the correspond-
ing REFL_ voltage. The volatile DAC registers retain data
and the output returns to its previous state when mute is
disabled. The MAX5116 also features an asynchronous
MUTE input that mutes all DACs simultaneously.
The volatile and nonvolatile registers remain active
while the MAX5115/MAX5116 are in mute and power-
down modes. Writing to or reading from the volatile or
nonvolatile registers does not remove the MAX5115/
MAX5116 from mute or power-down mode. Writing or
transferring data to the volatile registers while the
device is muted or powered down updates the DAC
outputs to the new state upon exiting mute or power-
down mode.
Mute/Power-Down Register and Operation
Separate nonvolatile and volatile control registers store
and update the state of the mute/power-down mode for
each DAC. Tables 7 and 8 show how to access and
control each register. Register access is gained by set-
ting control bits C3–C0 to 0100. Bits C5 and C4 indi-
cate whether the nonvolatile or volatile control register
is accessed. The volatile register maintains data while
NONVOLATILE
(NV)
VOLATILE
(V)
FUNCTION
00
Transfer data from NVREG_ to
VREG_
0 1 Write to VREG_
1 0 Write to NVREG_
1 1 Write to NVREG and VREG_
Table 2. Volatile and Nonvolatile Write
Selection
R3 R2 R1 R0 FUNCTION
0 0 0 0 DAC0
0 0 0 1 DAC1
0 0 1 0 DAC2
0 0 1 1 DAC3
1 1 1 1 All DACs*
Table 3. DAC Write Selection
*This option is only valid for a write to all volatile registers.
DATA BYTE
ADDRESS
BYTE
COMMAND BYTE
MSB LSB
COMMAND
S
T
A
R
T
R/W
A
C
K
C
7
C
6
C
5
C
4
C
3
C
2
C
1
C
0
A
C
K
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
A
C
K
STOP
Write VREG_ S 0 0 0 0 1
R
3
R
2
R
1
R
0
D7–D0 P
Write All
VREG_*
S 0 00011111 D7–D0 P
Write
NVREG_
S 0 0010
R
3
R
2
R
1
R
0
D7–D0 P
Write VREG_
and NVREG_
S 0 0011
R
3
R
2
R
1
R
0
D7–D0 P
Transfer
NVREG_ to
VREG_
S 0 0000
R
3
R
2
R
1
R
0
—P
Table 4. Write-Command Summary
*This option is only valid for a write to all volatile registers.