LTC2272 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2272' PDF : 44 Pages View PDF
APPLICATIONS INFORMATION
1.25V
3.3V
1μF
2, 3 LTC6652-2.5 6
4, 5, 7 ,8
VCM
2.2μF
LTC2273/
SENSE LTC2272
2.2μF
22732 F07
Figure 7. A 2.25V Range ADC with
an External 2.5V Reference
LTC2273/LTC2272
LTC2273/LTC2272 VDD
ENC+
ENC–
VDD
1.6V
6k
VDD 1.6V
6k
TO INTERNAL
ADC CLOCK
DRIVERS
22732 F08a
Figure 8a. Equivalent Encode Input Circuit
0.1μF T1
ENC+
50Ω
0.1μF
50Ω
100Ω
8.2pF
LTC2273/
LTC2272
0.1μF
ENC–
T1 = MA/COM ETC1-1-13
RESISTORS AND CAPACITORS
ARE 0402 PACKAGE SIZE
Figure 8b. Transformer Driven Encode
22732 F08b
VTHRESHOLD = 1.6V
ENC+
1.6V ENC–
LTC2273/
LTC2272
0.1μF
22732 F09
Figure 9. Single-Ended ENC Drive,
Not Recommended for Low Jitter
3.3V
MC100LVELT22 3.3V 130Ω
Q0
D0
130Ω
ENC+
Q0
83Ω
ENC–
LTC2273/
LTC2272
83Ω
22732 F10
Figure 10. ENC Drive Using a CMOS to PECL Translator
22732f
25
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