max5236eubt Maxim Integrated Products, Inc., max5236eubt Datasheet - Page 11

• Manufacturer Part Number: max5236eubt
• Description: Single-supply 3v/5v, Voltage-output, Dual, Precision 10-bit Dacs
• Manufacturer: Maxim Integrated Products, Inc.

Figure 1. Serial Interface Timing
Figure 2. Detailed Serial Interface Timing
The 3-wire serial interface (SPI/ QSPI/ and MICROWIRE
compatible) used in the MAX5236/MAX5237 allows for
complete control of DAC operations (Figures 4 and 5).
Figures 1 and 2 show the timing for the serial interface.
The serial word consists of 3 control bits followed by 10
data bits (MSB first) and 3 sub-bits as described in
Tables 1, 2, and 3. When the 3 control bits are all zero
or all 1, D9–D6 are used as additional control bits,
allowing for greater DAC functionality.
The digital inputs allow any of the following: loading the
input register(s) without updating the DAC register(s),
updating the DAC register(s) from the input register(s),
or updating the input and DAC register(s) simultane-
Single-Supply 3V/5V, Voltage-Output, Dual,
LDAC
SCLK
DIN
SCLK
CS
DIN
CS
______________________________________________________________________________________
C2
1
C1
t
CSO
C0
D9
Serial Interface
D8
t
CSS
D7
t
DS
D6
D5
8
t
CH
D4
t
CSH
9
ously. The control bits and D9–D6 allow the DACs to
operate independently.
Send the 16-bit data as one 16-bit word (QSPI) or two
8-bit packets (SPI and MICROWIRE), with CS low dur-
ing this period. The control bits and D9–D6 determine
which registers update and the state of the registers
when exiting shutdown. The 3-bit control and D9–D6
determine the following:
• Registers to be updated
• Selection of the power-down modes
t
D3
CP
Precision 10-Bit DACs
t
LDL
D2
t
CL
D1
COMMAND EXECUTED
D0
t
t
CSLD
DH
S2
t
CS1
S1
t
CSW
S0
16
(1)
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