24-BIT DATA STREAM
CS/LD
SCK
1
2
7
13
14
17
B5
B4
B3
B2
B1
B0
X
X
1654TD02a
3
4
10
12
21
23
B10
B9
B8
B7
B6
DATA WORD
B12
B11
5
6
8
9
11
18
24
22
16
20
19
B13
15
SDI
CONTROL BITS
ADDRESS BITS
C3
C2
C1
C0
A3
A2
A1
A0
TI I G DIAGRA S
W
29
30
31
32
B0
X
X
B0
X
X
CURRENT
STREAM
1654 TD02b
Figure 1a. 24-Bit Load Sequence (for Non-Daisy-Chained Applications)
32-BIT DATA STREAM
CS/LD
5
6
7
13
14
17
B13
B12
B11
B10
A2
A1
A0
ADDRESS BITS
C0
A3
A2
A1
A0
B13
B12
B11
B10
B9
B8
B7
A3
X
X
C3
C2
C1
C0
CONTROL BITS
X
X
X
C3
C2
C1
8
9
10
12
11
18
16
20
19
15
X
21
B9
22
B8
23
B7
24
B6
25
B5
DATA WORD
B6
B5
B4
B3
B2
B1
26
B4
27
B3
28
B2
SCK
1
2
3
4
SDI
X
X
X
X
X
B1
DON’T CARE
SDO
X
X
X
X
X
PREVIOUS STREAM
t
1
t
2
SCK
17
t
3
SDI
B13
t
8
SDO PREVIOUS B13
PREVIOUS B12
t
4
B12
18
Figure 1b. 32-Bit Load Sequence (for Single and Daisy-Chained LTC1654s)
UW
LTC1654
1654fb
7
LINER [ LINEAR TECHNOLOGY ]
