32-Channel, 16/14, Serial Input,
Voltage-Output DACs
Preliminary Technical Data
AD5372/AD5373
Power-on reset
Digital reset (RESET)
FEATURES
32-channel DAC in 56-LFCSP and 64-LQFP
AD5372 Guaranteed monotonic to 16 bits
AD5373 Guaranteed monotonic to 14 bits
Maximum output voltage span of 4 × VREF (20 V)
Nominal output voltage range of -4 V to +8 V
Multiple, independent output spans available
System calibration function allowing user-programmable
offset and gain
Channel grouping and addressing features
Thermal Monitoring Function
Clear function to user-defined SIGGND (CLR pin)
Simultaneous update of DAC outputs (LDAC pin)
APPLICATIONS
Level setting in automatic test equipment (ATE)
Variable optical attenuators (VOA)
Optical switches
Industrial control systems
Instrumentation
DSP/microcontroller-compatible serial interface
2.5 V to 5.5 V JEDEC-compliant digital levels
FUNCTIONAL BLOCK DIAGRAM
DV
V
V
SS
AGND DNGD
CC
DD
LDAC
VREF0
n = 16 FOR AD5372
n = 14 FOR AD5373
GROUP 0
BUFFER
n
CONTROL
REGISTER
14
n
n
n
OFFSET
DAC 0
OFS0
REGISTER
8
8
A/B SELECT
REGISTER
TO
MUX 2's
BUFFER
OUTPUT BUFFER
AND POWER
DOWN CONTROL
VOUT0
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7
n
n
n
X2A REGISTER
DAC 0
REGISTER
n
MUX
2
A/B
DAC 0
X1 REGISTER
MUX
X2B REGISTER
n
n
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
M REGISTER
C REGISTER
·
·
·
·
·
·
·
·
·
·
·
·
n
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
OUTPUT BUFFER
AND POWER
·
n
n
n
n
n
X2A REGISTER
SERIAL
INTERFACE
DAC 7
n
A/B
MUX
2
SYNC
SDI
DAC 7
X1 REGISTER
DOWN CONTROL
SIGGND0
REGISTER
MUX
X2B REGISTER
n
n
M REGISTER
C REGISTER
n
SCLK
SDO
VREF1
GROUP 1
14
n
n
n
OFFSET
DAC 1
OFS1
REGISTER
BUSY
8
n
n
8
TO
MUX 2's
A/B SELECT
REGISTER
BUFFER
RESET
CLR
OUTPUT BUFFER
AND POWER
DOWN CONTROL
VOUT8
n
X2A REGISTER
DAC 0
REGISTER
n
A/B
MUX
2
DAC 0
X1 REGISTER
VOUT9
MUX
X2B REGISTER
n
n
VOUT10
VOUT11
VOUT12
VOUT13
VOUT14
VOUT15
·
·
·
·
·
·
·
·
·
·
·
M REGISTER
C REGISTER
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
STATE
MACHINE
n
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
n
OUTPUT BUFFER
AND POWER
·
n
n
n
POWER-ON
RESET
n
n
X2A REGISTER
n
DAC 7
A/B
MUX
2
DAC 7
X1 REGISTER
DOWN CONTROL
SIGGND1
REGISTER
MUX
X2B REGISTER
n
n
M REGISTER
C REGISTER
n
AD5372/
AD5373
VREF1 SUPPLIES
GROUP 1 TO 3
VOUT16
TO
VOUT31
GROUP 2 TO GROUP 3
ARE IDENTICAL TO GROUP 1
5372-0001B
SIGGND3
SIGGND2
Figure 1.
AD5372/AD5373—Protected by U.S. Patent No. 5,969,657; other patents pending
Rev. PrF
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