40-Channel, 16-Bit, Serial Input,
Voltage-Output DACs
Preliminary Technical Data
FEATURES
40-channel DAC in 64 Lead LFCSP and LQFP
Guaranteed monotonic to 16 bits
Maximum output voltage span of 4 脳 V
REF
(20 V)
Nominal output voltage range of -4 V to +8 V
Multiple, independent output span available
System calibration function allowing user-programmable
offset and gain
Clear function to user-defined SIGGND (CLR pin)
Simultaneous update of DAC outputs (LDAC pin)
Channel grouping and addressing features
Thermal Monitor Function
AD5370
DSP/microcontroller-compatible serial interface
2.5 V to 5.5 V JEDEC-compliant digital levels
Power-on reset
Digital reset (RESET)
APPLICATIONS
Level setting in automatic test equipment (ATE)
Variable optical attenuators (VOA)
Optical switches
Industrial control systems
Instrumentation
FUNCTIONAL BLOCK DIAGRAM
DV
CC
V
DD
V
SS
AGND DNGD
LDAC
VREF0
CONTROL
REGISTER
16
14
8
16
16
16
A/B SELECT
REGISTER
X1 REGISTER
16
M REGISTER
C REGISTER
16
8
16
TO
MUX 2's
16
A/B
MUX
X2A REGISTER
X2B REGISTER
MUX 16
2
OFS0 14
REGISTER
DAC 0 16
REGISTER
OFFSET
DAC 0
BUFFER
DAC 0
OUTPUT BUFFER
AND POWER
DOWN CONTROL
BUFFER
GROUP 0
VOUT0
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7
SIGGND0
路
路
路
路
路
路
SYNC
SDI
SCLK
SDO
BUSY
SERIAL
INTERFACE
16
16
16
16
16
路
路
路
路
路
路
16
路
路
路
路
路
路
16
路
路
路
路
路
路
A/B
MUX
路
路
路
路
路
路
路
路
路
路
路
路
MUX
2
X1 REGISTER
M REGISTER
C REGISTER
X2A REGISTER
X2B REGISTER
16
DAC 7 16
REGISTER
路
路
路
路
路
路
路
路
路
路
路
路
DAC 7
路
路
路
路
路
路
OUTPUT BUFFER
AND POWER
DOWN CONTROL
GROUP 1
14
OFS1 14
REGISTER
DAC 0 16
REGISTER
OFFSET
DAC 1
BUFFER
X2A REGISTER
X2B REGISTER
MUX 16
2
DAC 0
OUTPUT BUFFER
AND POWER
DOWN CONTROL
VREF1
8
RESET
CLR
STATE
MACHINE
16
16
16
16
A/B SELECT
REGISTER
X1 REGISTER
8
16
16
TO
MUX 2's
16
A/B
MUX
16
VOUT8
VOUT9
VOUT10
VOUT11
VOUT12
VOUT13
VOUT14
VOUT15
SIGGND1
M REGISTER
C REGISTER
路
路
路
路
路
路
POWER-ON
RESET
16
16
16
16
16
路
路
路
路
路
路
16
路
路
路
路
路
路
16
路
路
路
路
路
路
A/B
MUX
路
路
路
路
路
路
X1 REGISTER
M REGISTER
C REGISTER
X2A REGISTER
X2B REGISTER
MUX 16
2
路
路
路
路
路
路
DAC 7 16
REGISTER
路
路
路
路
路
路
路
路
路
路
路
路
DAC 7
路
路
路
路
路
路
OUTPUT BUFFER
AND POWER
DOWN CONTROL
AD5370
VREF1 SUPPLIES
GROUP 1 TO GROUP 4
GROUP 2 TO GROUP 4
ARE IDENTICAL TO GROUP 1
VOUT16
TO
VOUT39
5370-0001C
SIGGND2
SIGGND3
SIGGND4
Figure 1.
AD5370鈥擯rotected by U.S. Patent No. 5,969,657; other patents pending
Rev. PrF
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