LTC1665 Linear Technology Corporation, LTC1665 Datasheet - Page 12

• Manufacturer Part Number: LTC1665
• Description: Ltc1665 - Micropower Octal 8-bit And 10-bit Dacs
• Manufacturer: Linear Technology Corporation

LTC1665/LTC1660
TYPICAL APPLICATIONS
12
V
V
OUT2
OUT1
1
7
LTC1258-2.5
0.1 F
R1
R1
3.3V
2
4
LT
LT1491
U2A
®
U2B
11
1491
3.3V
0.1 F
4
–
+
–
+
INTERFACE
2
3
6
5
1
3-WIRE
SERIAL
R2
0.1 F
0.1 F
R2
COARSE
COARSE
FINE
FINE
R1
R2
R1
R2
V
V
V
V
CS/LD
OUT A
OUT B
OUT C
OUT D
GND
SCK
REF
A Low Power Quad Trim Circuit with Coarse/Fine Adjustment
1
2
3
4
5
6
7
8
U
DAC A
DAC B
DAC C
DAC D
CONTROL
LOGIC
SHIFT REGISTER
LTC1665
U1
ADDRESS
DECODER
DAC H
DAC G
DAC E
DAC F
16
15
14
13
12
11
10
9
V
V
V
V
V
CLR
D
D
R2 >> R1
V
Similarly V
Example: For R1 = 110 and R2 = 11k,
V
CC
OUT H
OUT G
OUT F
OUT E
IN
0.1 F
OUT
OUT 1
OUT 1
1665/60 TA01
3.3V
TO OTHER
LTC1665s
= V
= V
COARSE
COARSE
FINE
FINE
R1
R2
R1
R2
OUT 2
OUT A
OUT A
, V
R2
R2
+
+ 0.01 V
OUT 3
R1
R2
13
12
10
0.1 F
0.1 F
9
–
+
–
+
LT1491
LT1491
V
, V
U2D
U2C
OUT B
OUT B
OUT 4
R1
R1
14
8
V
V
OUT4
OUT3