Datasheet

AD7904/AD7914/AD7924 Data Sheet
Rev. C | Page 26 of 32
SCLK
DOUT
DIN
CS
1
2 3 4 5 6
11
12
13
14
15
16
B
THREE-
STATE
ZERO
THREE-
STATE
4 TRAILING ZEROS
DONTC DONTC
ZERO
DB0
ZERO
ZERO
ZERO
ZERO
ADD1
ADD0
DB7 DB6
DONTC DONTC
CODING
SEQ1 DONTC DONTC ADD1 ADD0
WRITE
2 IDENTIFICATION
BITS
t
9
t
2
t
3
t
4
t
7
t
6
t
CONVERT
t
5
t
8
t
QUIET
t
11
t
10
03087-027
Figure 27. AD7904 Serial Interface Timing Diagram
SCLK
DOUT
DIN
CS
1 2 3
4
5
6
11
12
13 14 15 16
B
THREE-
STATE
ZERO
THREE-
STATE
2 TRAILING ZEROS
DONTC DONTC
DB1
DB2
DB0 ZERO
ZERO
ZERO
ADD1 ADD0
DB9
DB8
DONTC
DONTC
CODINGSEQ1
DONTC DONTC
ADD1
ADD0WRITE
2 IDENTIFICATION
BITS
t
9
t
2
t
3
t
4
t
7
t
6
t
CONVERT
t
5
t
8
t
QUIET
t
11
t
10
03087-028
Figure 28. AD7914 Serial Interface Timing Diagram
SCLK
DOUT
DIN
CS
1 2 3 4 5 6 11 12 13 14 15 16
B
THREE-
STATE
ZERO
THREE-
STATE
DONTC DONTC
DB3DB4 DB2 DB1 DB0
ZERO ADD1 ADD0 DB11 DB10
DONTC DONTC
CODINGSEQ1 DONTC DONTC ADD1 ADD0WRITE
2 IDENTIFICATION
BITS
t
9
t
2
t
3
t
4
t
7
t
6
t
CONVERT
t
5
t
8
t
QUIET
t
11
t
10
03087-029
Figure 29. AD7924 Serial Interface Timing Diagram