Datasheet

LTC2175-12/
LTC2174-12/LTC2173-12
18
21754312fa
FuncTional block DiagraM
Figure 1. Functional Block Diagram
DIFF
REF
AMP
REF
BUF
2.2µF
0.1µF 0.1µF
0.1µF
0.1µF
REFH REFL
RANGE
SELECT
1.25V
REFERENCE
V
DD
/2
V
DD
1.8V
REFH
GND
REFL VCM12 VCM34
DATA
SERIALIZER
OGND
217512 F01
S/H
S/H
S/H
S/H
SENSE
V
REF
1µF
0.1µF
12-BIT
ADC CORE
12-BIT
ADC CORE
12-BIT
ADC CORE
12-BIT
ADC CORE
OV
DD
1.8V
ENC
+
ENC
–
PLL
OUT1A
–
OUT1A
+
OUT1B
–
OUT1B
+
OUT2A
–
OUT2A
+
OUT2B
–
OUT2B
+
DATA
CLOCK OUT
+
DATA
CLOCK OUT
–
OUT3A
–
OUT3A
+
OUT3B
–
OUT3B
+
OUT4A
–
OUT4A
+
OUT4B
–
OUT4B
+
FRAME
+
FRAME
–
SDOCS
MODE
CONTROL
REGISTERS
SCKPAR/SER SDI
CHANNEL 1
ANALOG INPUT
+
CHANNEL 1
ANALOG INPUT
–
CHANNEL 2
ANALOG INPUT
+
CHANNEL 2
ANALOG INPUT
–
CHANNEL 3
ANALOG INPUT
+
CHANNEL 3
ANALOG INPUT
–
CHANNEL 4
ANALOG INPUT
+
CHANNEL 4
ANALOG INPUT
–