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AD7908 Datasheet(PDF) 22 Page - Analog Devices

Part # AD7908
Description  8-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 20-Lead TSSOP
PDF  24 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7908 Datasheet(HTML) 22 Page - Analog Devices

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AD7908/AD7918/AD7928
REV. A
CS
SCLK
DOUT
DIN
t2
t3
t9
t4
t7
t5
t11
t8
tQUIET
t6
tCONVERT
12
345
6
11
12
13
14
15
16
THREE-
STATE
ADD2
ADD1
ADD0
DB7
DB6
DB0
ZERO
ZERO
ZERO
ZERO
THREE-
STATE
4 TRAILING ZEROS
3 IDENTIFICATION
BITS
t10
ZERO
B
WRITE
SEQ1
DONTC
ADD2
ADD1
ADD0
CODING
DONTC
DONTC
DONTC
DONTC
Figure 17. AD7908 Serial Interface Timing Diagram
CS
SCLK
DOUT
DIN
t2
t3
t9
t4
t7
t5
t11
t8
t6
tCONVERT
12
345
6
11
12
13
14
15
16
THREE-
STATE
ADD2
ADD1
ADD0
DB9
DB8
DB2
DB1
DB0
ZERO
ZERO
THREE-
STATE
2 TRAILING ZEROS
3 IDENTIFICATION
BITS
t10
ZERO
B
WRITE
SEQ
DONTC
ADD2
ADD1
ADD0
CODING
DONTC
DONTC
DONTC
DONTC
tQUIET
Figure 18. AD7918 Serial Interface Timing Diagram
CS
SCLK
DOUT
DIN
t3
t2
t9
t4
t6
t7
t10
t5
t11
t8
tQUIET
tCONVERT
WRITE
SEQ
DONTC
ADD2
ADD1
ADD0
DONTC
DONTC
DONTC
12
3
4
5
13
14
15
16
B
ADD2
ADD1
ADD0
DB11
DB10
DB2
DB1
DB0
THREE-
STATE
ZERO
3 IDENTIFICATION BITS
THREE-
STATE
Figure 19. AD7928 Serial Interface Timing Diagram
CS
SCLK
DOUT
DIN
tCONVERT
t2
t3
t9
t4
t6
t7
t5
t11
t8
ZERO
SEQUENCE 1
SEQUENCE 2
3 IDENTIFICATION BITS
THREE-
STATE
THREE-
STATE
12
3
4
5
13
14
15
16
ADD2
ADD1
ADD0
DB11
DB10
DB2
DB1
DB0
VIN0VIN1VIN2VIN3VIN4VIN5VIN5VIN6VIN7
t10
C
Figure 20. AD7928 Writing to SHADOW Register Timing Diagram
–22–



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