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MAX31865

Maxim Integrated
Part Number MAX31865
Manufacturer Maxim Integrated
Description RTD-to-Digital Converter
Published Oct 1, 2012
Detailed Description MAX31865 RTD-to-Digital Converter General Description The MAX31865 is an easy-to-use resistance-to-digital converter opt...
Datasheet PDF File MAX31865 PDF File

MAX31865
MAX31865


Overview
MAX31865 RTD-to-Digital Converter General Description The MAX31865 is an easy-to-use resistance-to-digital converter optimized for platinum resistance temperature detectors (RTDs).
An external resistor sets the sensitivity for the RTD being used and a precision delta-sigma ADC converts the ratio of the RTD resistance to the reference resistance into digital form.
The MAX31865’s inputs are protected against overvoltage faults as large as Q50V.
Programmable detection of RTD and cable open and short conditions is included.
Features S Simple Conversion of Platinum RTD Resistance to Digital Value S Handles 100Ω to 1kΩ (at 0°C) Platinum RTDs (PT100 to PT1000) S Compatible with 2-, 3-, and 4-wire Sensor Connections S Conversion Time: 21ms max S 15-Bit ADC Resolution; Nominal Temperature Resolution 0.
03125NC (Varies Due to RTD Nonlinearity) S Total Accuracy Over All Operating Conditions: 0.
5NC (0.
05% of Full Scale) max S ±0V Input Protection S Fully Differential VREF Inputs S Fault Detection (Open RTD Element, RTD Shorted to Out-of-Range Voltage, or Short Across RTD Element) S SPI-Compatible Interface S 20-Pin TQFN Package Applications Industrial Equipment Medical Equipment Instrumentation Ordering Information appears at end of data sheet.
M VDD 0.
1µF DVDD VDD BIAS REFIN+ REFINISENSOR FORCE+ FORCE2 RTDIN+ RTDINDGND GND2 FORCE- For related parts and recommended products to use with this part, refer to www.
maximintegrated.
com/MAX31865.
related.
4-WIRE SENSOR CONNECTION PR SDI HOST INTERFACE SCLK CS SDO N.
C.
EL I VDD 0.
1µF RREF DRDY MAX31865 IN www.
DataSheet.
net/ GND1 Typical Application Circuits continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.
maximintegrated.
com.
AR Y RCABLE RCABLE CI* RCABLE RTD RCABLE Typical Application Circuits *CI = 10nF FOR 1kΩ RTD 100nF FOR 100Ω RTD XX-XXXX; Rev 0; 9/12 Datasheet pdf - http://www.
DataSheet4U.
co.
kr/...


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