Datasheet

29
LTC2400
V
IN
SDO
SCK
CS
CS
SDO
SCK
3
2
1
4
5
6
7
8
V
REF
V
REFIN
V
CC
0.1µF
0.1µF
5V5V
GND
LTC2400
F
O
2400 F31
V
+
D
V
–
DATA 2
DATA 1
CS
CLK
GND
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
S0
S1
S2
S3
S4
S5
S6
S7
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
LTC1391
Figure 31. Multiplex 8-Signal Sources with the LTC1391 and Maintain the LTC2400’s Conversion Accuracy
TYPICAL APPLICATIONS
U
V
IN
SDO
SCK
CS
CHIP SELECT
SERIAL
SERIAL
3
3
7
4
6
R1
9.09k
R
S
*
5.1k
R2
90.9k
*OPTIONAL: LIMITS INPUT CURRENT IF THE
INPUT VOLTAGE GOES BELOW –300mV
2
2
1
4
5
6
7
8
V
REF
V
REFIN
V
CC
0.1µF
5V
GND
LTC2400
F
O
0.1µF
5V
5V
–5V
0.1µF
0.1µF
11
4
7 8
12
C
S
1µF
EXT
C
H
1µF
DIFFERENTIAL
INPUT
V
FS
= 40mV
BRIDGE-
TYPICAL
INPUT
C1
0.01µF
0.1µF
2400 F30
–5V
1/2
LTC1043
13
16
14
17
350Ω
AGND OR
–V
EXT
350Ω
350Ω350Ω
–
+
LTC1050
Figure 30. Differential to Single-Ended Converter for Low Level Inputs, Such as Bridges, Maintains the LTC2400’s High Accuracy