Datasheet

6
LTC1454/LTC1454L
LD
LD
12-BIT
DAC B
REGISTER
12-BIT
DAC A
REGISTER
POWER-ON
RESET
3
4
5
6
15
13
12
11
10
9
DAC B
DAC A
–
+
A
–
+
B
REFERENCE
LTC1454: 2.048V
LTC1454L: 1.22V
X1/X2 B
R
R
CLK
D
IN
CS/LD
D
OUT
V
OUT A
V
OUT B
V
CC
REFHI B
GND
REFLO
REFHI A
REFOUT
V
CC
1454 BD01
1
CLR
2
X1/X2 A
7
8
16
R
R
24-BIT
SHIFT
REGISTER
14
W
IDAGRA
B
L
O
C
K
TI I G DIAGRA
WU W
B11 A
MSB
B11 B
MSB
B0 A
LSB
t
1
t
6
B0 B
LSB
B11 A
CURRENT WORD
t
7
t
2
t
4
t
3
t
8
CLK
D
IN
D
OUT
CS/LD
t
5
1454/5 • TD01
B0 B
PREVIOUS WORD
B11 A
PREVIOUS WORD
B10 A
PREVIOUS WORD
B0 A
PREVIOUS WORD
B11 B
PREVIOUS WORD
B0 B
PREVIOUS WORD
t
9