Datasheet
11
®
ADS1286
ADS1286
µP
DCLOCK
D
OUT
CS/SHDN
A
0
A
1
U
3
U
4
U
1
U
2
Thermocouple
ISO Thermal Block
MUX
OPA237
0.3V
0.4V
0.2V
0.1V
+5V
R
2
59kΩ
R
4
1kΩ
R
3
500kΩ
R
5
500Ω
R
7
10Ω
C
3
0.1µF
C
4
10µF
C
5
0.1µF
R
6
1MΩ
R
1
150kΩ
D
1
TC
2
TC
1
TC
3
+5V
C
2
0.1µF
C
1
10µF
+5V
R
8
46kΩ
R
9
1kΩ
R
10
1kΩ
R
11
1kΩ
R
12
1kΩ
V
REF
3-Wire
Interface
FIGURE 5. Thermocouple Application Using a MUX to Scale the Input Range of the ADS1286.
ADS1286
REF200
(100µA)
µP
D
OUT
RTD
DCLOCK
CS/SHDN
+V
CC
V
REF
81
2
3
4
0.1µF
FIGURE 6. ADS1286 with RTD Sensor.