32-Channel, 16-/14-Bit,
Serial Input, Voltage Output DAC
AD5372/AD5373
2.5 V to 5.5 V JEDEC-compliant digital levels
FEATURES
Digital reset (RESET)
Clear function to user-defined SIGGNDx
Simultaneous update of DAC outputs
32-channel DAC in a 64-lead LQFP and 64-lead LFCSP
AD5372/AD53731 guaranteed monotonic to 16/14 bits
Maximum output voltage span of 4 × VREF (20 V)
Nominal output voltage range of −4 V to +8 V
Multiple, independent output voltage spans available
System calibration function allowing user-programmable
offset and gain
Channel grouping and addressing features
Thermal shutdown function
DSP/microcontroller-compatible serial interface
SPI serial interface
APPLICATIONS
Level setting in automatic test equipment (ATE)
Variable optical attenuators (VOA)
Optical switches
Industrial control systems
Instrumentation
FUNCTIONAL BLOCK DIAGRAM
DV
V
V
SS
AGND DGND
LDAC
CC
DD
VREF0
n = 16 FOR AD5372
n = 14 FOR AD5373
n
CONTROL
REGISTER
GROUP 0
BUFFER
n
n
14
n
OFFSET
DAC 0
OFS0
REGISTER
8
n
8
A/B SELECT
REGISTER
TO
MUX 2s
BUFFER
OUTPUT BUFFER
AND POWER-
DOWN CONTROL
VOUT0
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7
SIGGND0
n
n
X2A REGISTER
X2B REGISTER
DAC 0
REGISTER
DAC 0
X1 REGISTER
n
n
n
M REGISTER
n
C REGISTER
OUTPUT BUFFER
AND POWER-
DOWN CONTROL
n
n
n
n
n
X2A REGISTER
X2B REGISTER
DAC 7
REGISTER
SERIAL
INTERFACE
DAC 7
X1 REGISTER
SYNC
SDI
n
n
n
M REGISTER
n
SCLK
SDO
C REGISTER
VREF1
GROUP 1
BUFFER
n
n
14
n
BUSY
OFFSET
DAC 1
OFS1
REGISTER
8
n
8
A/B SELECT
TO
MUX 2s
BUFFER
RESET
CLR
REGISTER
OUTPUT BUFFER
AND POWER-
DOWN CONTROL
VOUT8
n
n
X2A REGISTER
X2B REGISTER
DAC 0
REGISTER
DAC 0
X1 REGISTER
VOUT9
n
n
n
M REGISTER
n
VOUT10
VOUT11
VOUT12
VOUT13
VOUT14
VOUT15
SIGGND1
STATE
MACHINE
C REGISTER
OUTPUT BUFFER
AND POWER-
DOWN CONTROL
n
n
n
n
n
X2A REGISTER
X2B REGISTER
DAC 7
REGISTER
DAC 7
X1 REGISTER
n
n
n
M REGISTER
n
C REGISTER
VREF1 SUPPLIES
GROUP 1 TO GROUP 3
VOUT16
TO
VOUT31
GROUP 2 TO GROUP 3
ARE IDENTICAL TO GROUP 1
AD5372/
AD5373
SIGGND2
SIGGND3
Figure 1.
1 Protected by U.S. Patent No. 5,969,657.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007–2011 Analog Devices, Inc. All rights reserved.
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