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Evaluates: MAX31865

MAX31865PMB1 Peripheral Module

General Description

The MAX31865PMB1 peripheral module (Pmod™) pro-

vides the necessary hardware to interface the MAX31865

RTD-to-digital converter to any system that utilizes Pmod-

compatible expansion ports configurable for SPI com-

munication. The IC is an easy-to-use resistance-to-digital

converter optimized for platinum resistance temperature

detectors (RTDs). This module is set up to operate with a

PT100 platinum RTD.

For full range accuracies, other RTD types, and detailed

information regarding operation of the IC, refer to the

MAX31865 IC data sheet.

Features and Benets

● Simple Conversion of Platinum RTD Resistance to

Digital Value

● Handles 100Ω to 1kΩ (at 0°C) Platinum RTDs

(PT100 to PT1000)

● Compatible with 2-, 3-, and 4-Wire Sensor

Connections

● 6-Pin Pmod-Compatible Connector (SPI)

● RoHS Compliant

● Proven PCB Layout

● Fully Assembled and Tested

19-6909; Rev 0; 1/14

Ordering Information appears at end of data sheet.

Pmod is a trademark of Digilent Inc.

Peripheral Module Board Photo

Summary of content (7 pages)

PAGE 1
Evaluates: MAX31865 MAX31865PMB1 Peripheral Module General Description The MAX31865PMB1 peripheral module (Pmod™) provides the necessary hardware to interface the MAX31865 RTD-to-digital converter to any system that utilizes Pmodcompatible expansion ports configurable for SPI communication. The IC is an easy-to-use resistance-to-digital converter optimized for platinum resistance temperature detectors (RTDs). This module is set up to operate with a PT100 platinum RTD.
PAGE 2
Evaluates: MAX31865 MAX31865PMB1 Peripheral Module Detailed Description J2 SPI Interface The MAX31865PMB1 Pmod can plug directly into a Pmod-compatible port (configured for SPI) through connector J1. For information on the SPI protocol, refer to the MAX31865 IC data sheet. J1 provides connection of the module to the Pmod host. The pin functions and pin assignments adhere to the Pmod standard recommended by Digilent. See Table 1 for detailed descriptions.
PAGE 3
Evaluates: MAX31865 MAX31865PMB1 Peripheral Module Component List DESIGNATION QTY C1 1 DESCRIPTION DESIGNATION QTY DESCRIPTION 1µF ±10%, 25V X7R ceramic capacitor (0603) TDK C1608X7R1E105K080AB R1 1 4.7kΩ ±5% resistor (0603) R2–R6 5 150Ω ±5% resistors (0603) R7 1 400Ω ±0.1% resistor (0603) R8 0 Not installed, 400Ω ±0.1% resistor (0805) C2–C4 3 0.1µF ±10%, 25V XR7 ceramic capacitors (0603) TDK C1608X7R1E104K080AA CON1 1 4-position screw terminal, 2.
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MAX31865PMB1 Peripheral Module Evaluates: MAX31865 Figure 1. MAX31865PMB1 Peripheral Module Schematic www.maximintegrated.
PAGE 5
MAX31865PMB1 Peripheral Module Evaluates: MAX31865 Figure 2. MAX31865PMB1 Peripheral Module Component Placement Guide—Top Figure 3. MAX31865PMB1 Peripheral Module Component Placement Guide—Bottom www.maximintegrated.
PAGE 6
MAX31865PMB1 Peripheral Module Evaluates: MAX31865 Ordering Information PART TYPE MAX31865PMB1# Peripheral Module #Denotes RoHS compliant. www.maximintegrated.
PAGE 7
Evaluates: MAX31865 MAX31865PMB1 Peripheral Module Revision History REVISION NUMBER REVISION DATE 0 1/14 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied.