Rainbow Electronics MAX5157 User Manual
Page 12
MAX5156/MAX5157
Daisy Chaining Devices
Any number of MAX5156/MAX5157s can be daisy
chained by connecting the DOUT pin of one device to the
DIN pin of the following device in the chain (Figure 7).
Since the MAX5156/MAX5157’s DOUT has an internal
active pull-up, the DOUT sink/source capability deter-
mines the time required to discharge/charge a capaci-
tive load. Refer to the digital output V
OH
and V
OL
speci-
fications in the
Electrical Characteristics
.
Figure 8 shows an alternative method of connecting
several MAX5156/MAX5157s. In this configuration, the
data bus is common to all devices; data is not shifted
through a daisy-chain. More I/O lines are required in
this configuration because a dedicated chip-select
input (CS) is required for each IC.
Low-Power, Dual, 12-Bit Voltage-Output DACs
with Configurable Outputs
12
______________________________________________________________________________________
CS
SCLK
DIN
COMMAND
EXECUTED
9
8
16
1
C1
A0
S0
C0
D11 D10
D9
D8
D5
D4
D3
D2
D1
D0
D7
D6
Figure 5. Serial-Interface Timing Diagram
SCLK
DIN
t
CSO
t
CSS
t
CL
t
CH
t
CP
t
CSW
t
CS1
t
CSH
t
DS
t
DH
CS
Figure 6. Detailed Serial-Interface Timing Diagram
TO OTHER
SERIAL DEVICES
MAX5156
MAX5157
DIN
SCLK
CS
MAX5156
MAX5157
MAX5156
MAX5157
DIN
DOUT
DOUT
DOUT
SCLK
CS
DIN
SCLK
CS
Figure 7. Daisy Chaining MAX5156/MAX5157s