LTC1664_1 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1664_1' PDF : 16 Pages View PDF
LTC1664
TYPICAL APPLICATIONS
A Low Power Dual Trim Circuit with Coarse/Fine Adjustment
R1 3.3V
110Ω
0.1µF
1
VOUT1
8
2
U2A
LT®1490
3
4
3.3V 0.1µF
R2
11k
GND
1
R1
110Ω
COARSE VOUT A
2
0.1µF
R2
11k
FINE VOUT B
3
2
1
LTC1258-2.5
REF
6
4
CS/LD
7
3-WIRE
SERIAL
INTERFACE
SCK
8
DAC A
U1
LTC1664
DAC D
DAC B
DAC C
CONTROL
LOGIC
ADDRESS
DECODER
SHIFT REGISTER
3.3V
0.1µF
VCC
16
VOUT D
5
R1
110Ω
COARSE
R2
R1
11k
110Ω
6–
U2B
5 +LT1490
7
VOUT2
R2
11k
VOUT C
FINE
4
0.1µF
CLR
11
DOUT
10
DIN
9
TO OTHER
LTC1664s
1664 TA01
) VOUT 1 = VREF
CODE A + R1 CODE B
1024 R2 1024
) = 2.5V CODE A + 1 CODE B
1024 100 1024
) VOUT 2 = VREF
CODE D + R1 CODE C
1024 R2 1024
) = 2.5V CODE D + 1 CODE C
1024 100 1024
12
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