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AD7397AN Datasheet(PDF) 4 Page - Analog Devices

Part # AD7397AN
Description  3 V, Parallel Input Dual 12-Bit /10-Bit DACs
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7397AN Datasheet(HTML) 4 Page - Analog Devices

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AD7396/AD7397
–4–
REV. 0
Table I. Control Logic Truth
CS
A/
B
LDA
LDB
RS
SHDN
Input Register
DAC Register
L
L
HHHX
Write to B
Latched with Previous Data
L
HHHHX
Write to A
Latched with Previous Data
L
L
H
L
H
X
Write to B
B Transparent
L
H
L
H
H
X
Write to A
A Transparent
H
X
L
L
H
X
Latched
A and B Transparent
H
X
^
^
H
X
Latched
Latched with New Data from Input REG
XXXXL
X
Reset to Zero Scale
Reset to Zero Scale
H
XXX^
X
Latched to Zero
Latched to Zero
^Denotes positive edge. The
SHDN pin has no effect on the digital interface data loading; however, while in the SHDN state (SHDN = 0) the output amplifiers V
OUTA
and VOUTB exhibit an open circuit condition. Note, the LDx inputs are level-sensitive, the respective DAC registers are in a transparent state when LDx = “0.”
tCSW
1 LSB
ERROR BAND
tAS
tAH
CS
A/
B
tDH
tDS
tLS
tLH
tLDW
tRSW
tS
tS
LDA, LDB
RS
VOUT
D0–D11
Figure 2. Timing Diagram
B REGISTER
1 OF 12
LATCHES
OF THE 2 INPUT
REGISTERS
TO DAC
REGISTERS
DBx
CS
A/
B
RS
Figure 3. Digital Control Logic


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