Dual-Channel, Platinum RTD-to-Voltage
Signal Conditioner
Pt RTD PROBE
Pt RTD PROBE
CONNECTOR
CONNECTOR
0.1µF
+5V
VCC
RSRC
RS1+
ESD
CLAMP
RS1-
ESD
CLAMP
VCC
VCC
IEXC
HI-V
DETECT
MAX6603
AMP
FAULT
DETECT
RSRC
RS2+
ESD
CLAMP
RS2-
ESD
CLAMP
IEXC
HI-V
DETECT
AMP
FAULT
DETECT
OUT1
DG1
OUT2
DG2
0.1µF
ADC-REF
ADC1
INPUT1
MICROCONTROLLER
ADC2
INPUT2
GND
Figure 3. A Typical Application Circuit with Ratiometric Output Coupled to Ratiometric Microcontroller ADC
8 _______________________________________________________________________________________