Datasheet

MAX31865
RTD-to-Digital Converter
23Maxim Integrated
Typical Application Circuits (continued)
MAX31865
BIAS
REFIN+
DVDD
V
DD
GND1 GND2 DGND
REFIN-DRDY
ISENSORSDI
SCLK
HOST
INTERFACE
CS
SDO
N.C.
FORCE-
R
REF
RTD
R
CABLE
R
CABLE
0.1µF
V
DD
FORCE+
FORCE2
RTDIN+
RTDIN-
C
I
*
R
CABLE
0.1µF
V
DD
3-WIRE SENSOR CONNECTION
MAX31865
BIAS
REFIN+
DVDD
V
DD
GND1 GND2 DGND
REFIN-DRDY
ISENSORSDI
SCLK
HOST
INTERFACE
CS
SDO
N.C.
FORCE-
R
REF
RTD
0.1µF
V
DD
FORCE+
FORCE2
RTDIN+
RTDIN-
C
I
*
*C
I
= 10nF FOR 1kΩ RTD
100nF FOR 100Ω RTD
0.1µF
V
DD
2-WIRE SENSOR CONNECTION