Datasheet

LTC1664
11
1664fa
typical applications
A Low Power Dual Trim Circuit with Coarse/Fine Adjustment
V
OUT2
V
OUT1
R1
110Ω
COARSE
0.1µF
0.1µF
R1
110Ω
8
1
2 3
4
3.3V 3.3V
R2
11k
R2
11k
FINE
R1
110Ω
COARSE
R2
11k
FINE
1664 TA01
2
5
1
GND
V
OUT A
V
OUT B
REF
CS/LD
SCK
3-WIRE
SERIAL
INTERFACE
V
CC
V
OUT D
V
OUT C
CLR
TO OTHER LTC1664s
D
OUT
D
IN
16
DAC A DAC D
3 4
DAC B DAC C
7 6 8
11
9
ADDRESS
DECODER
CONTROL
LOGIC
SHIFT REGISTER
0.1µF
3.3V
1
4 2
U1
LTC1664
–
+
U2A
LT
®
1490
LTC1258-2.5
0.1µF
0.1µF
R1
110Ω
7
6 5
R2
11k
–
+
U2B
LT1490
10
V
OUT1
= V
REF
CODE A
1024
+
R1
R2
CODE B
1024
  
  
= 2.5V
CODE A
1024
+
1
100
CODE B
1024
  
  
V
OUT2
= V
REF
CODE D
1024
+
R1
R2
CODE C
1024
  
  
= 2.5V
CODE D
1024
+
1
100
CODE C
1024
  
  