+5V
+5V
+5V
R8
46kΩ
0.4V
0.3V
R7
10Ω
R9
1kΩ
R1
150kΩ
OPA237
D1
C2
0.1µF
U2
R3
500kΩ
R10
1kΩ
C1
10µF
MUX
R6
1MΩ
R2
59kΩ
VREF
0.2V
0.1V
DCLOCK
DOUT
R11
1kΩ
C3
0.1µF
ADS1286
TC1
A0
TC2
TC3
CS/SHDN
A1
Thermocouple
R12
1kΩ
U1
C4
10µF
R4
1kΩ
U3
C5
0.1µF
R5
500Ω
µP
ISO Thermal Block
3-Wire
Interface
U4
FIGURE 5. Thermocouple Application Using a MUX to Scale the Input Range of the ADS1286.
+VCC
REF200
(100µA)
0.1µF
VREF
1
8
DCLOCK
DOUT
2
µP
ADS1286
RTD
CS/SHDN
3
4
FIGURE 6. ADS1286 with RTD Sensor.
®
11
ADS1286