Datasheet

35
21421012fa
LTC2142-12/
LTC2141-12/LTC2140-12
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
D1_0_1
+
D1_0_1
–
DNC
DNC
DNC
DNC
OV
DD
OGND
CLKOUT
+
CLKOUT
–
D2_10_11
+
D2_10_11
–
D2_8_9
+
D2_8_9
–
D2_6_7
+
D2_6_7
–
65
PAD
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
V
DD
SENSE
V
REF
SDO
OF2_1
+
OF2_1
–
D1_10_11
+
D1_10_11
–
D1_8_9
+
D1_8_9
–
D1_6_7
+
D1_6_7
–
D1_4_5
+
D1_4_5
–
D1_2_3
+
D1_2_3
–
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
V
DD
ENC
+
ENC
–
CS SCK SDI DNC DNC DNC DNC D2_1_0
–
D2_1_0
+
D2_2_3
–
D2_2_3
+
D2_4_5
–
D2_4_5
+
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
C19
0.1µF
SDO
SENSE
V
DD
V
DD
V
CM1
GND
A
IN1
+
A
IN1
–
GND
REFH
REFL
REFH
REFL
PAR/SER
A
IN2
+
A
IN2
–
GND
V
CM2
V
DD
C20
0.1µF
C18
0.1µF
V
DD
PAR/SER
C17
1µF
C23
2.2µF
C37
0.1µF
DIGITAL
OUTPUTS
DIGITAL
OUTPUTS
OV
DD
SPI BUS
C67
0.1µF
C78
0.1µF
C79
0.1µF
R51
100
LTC2142-12
ENCODE
CLOCK
CN1
A
IN2
+
A
IN2
–
A
IN1
+
A
IN1
–
C15
0.1µF
C21
0.1µF
+
+
–
–
–
–
+
+
21821012 TA02
TYPICAL APPLICATIONS
LTC2142 Schematic