LTC1662 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1662' PDF : 12 Pages View PDF
LTC1662
U
OPERATIO
OUTPUT
VOLTAGE
VREF = VCC
VREF = VCC
INPUT CODE
(2c)
POSITIVE
FSE
OUTPUT
VOLTAGE
OUTPUT
VOLTAGE
0
512
1023
INPUT CODE
(2a)
0V
NEGATIVE
OFFSET
INPUT CODE
(2b)
1662 F02
Figure 2. Effects of Rail-to-Rail Operation On a DAC Transfer Curve. (a) Overall Transfer Function (b) Effect of Negative
Offset for Codes Near Zero Scale (c) Effect of Positive Full-Scale Error for Input Codes Near Full Scale When VREF = VCC
TYPICAL APPLICATIO S
Micropower Trim Circuit with Coarse/Fine Adjustment. Total Supply Current Is 9.5µA
3.3V
0.1µF
2
1
LTC1258-2.5 2.5V
4
3.3V 0.1µF
4 REF 6 VCC
1
CS/LD
3
SDI
2
SCK
DAC A
LTC1662
U1
DAC B
R2
1.1M
R1
COARSE
8 11k
VOUT A
0.1µF
R2
FINE
5 1.1M
VOUT B
R1
11k
3.3V
0.1µF
8
2–
1
LT1495
3+
4
VOUT
( ) VOUT = VREF
CODE A
1024
+
R1
R2
•
CODE B
1024
( ) = 2.5V
CODE A
1024
+
1
100
•
CODE B
1024
7 GND
1662 F04
10
Share Link: 
