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MAX31865 Evaluation Kit Evaluates: MAX31865

General Description

The MAX31865 evaluation kit (EV kit) provides the hard-

ware and software (graphical user interface) necessary

to evaluate the MAX31865 RTD-to-digital Converter. The

EV kit includes a MAX31865ATP+ installed as well as a

USB-to-SPI interface.

The USB-to-SPI master section of the EV kit can be used

to interact with the MAX31865 EV kit software and exer-

cise the device’s functionality.

EV Kit Contents

● AssembledcircuitboardincludingMAX31865ATP+

and USB-to-SPI circuitry

● Mini-USBcable

● Two0.2injumperwires

● 1kΩresistor

Features

● EasyEvaluationoftheMAX31865

● FullyAssembledandTested

● USBHIDInterface

● EVKitHardwareisUSBPowered(USBCable

Included)

● WindowsXP

-,WindowsVista

-, and

Windows

7-Compatible Software

● RoHSCompliant

● ProvenPCBLayout

MAX31865 EV Kit Files

EV Kit Photo

Note: The .EXE file is downloaded as a .ZIP file.

19-6500; Rev 0; 11/12

Ordering Information appears at end of data sheet.

Windows, Windows XP, and Windows Vista are registered

trademarks and registered service marks of Microsoft

Corporation.

FILE DESCRIPTION

MAX31865EVKitSoftwareInstall.EXE Application program

Summary of content (13 pages)

PAGE 1
MAX31865 Evaluation Kit General Description The MAX31865 evaluation kit (EV kit) provides the hardware and software (graphical user interface) necessary to evaluate the MAX31865 RTD-to-digital Converter. The EV kit includes a MAX31865ATP+ installed as well as a USB-to-SPI interface. The USB-to-SPI master section of the EV kit can be used to interact with the MAX31865 EV kit software and exercise the device’s functionality.
PAGE 2
MAX31865 Evaluation Kit Evaluates: MAX31865 Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION C2, C5, C10, C212 4 0.1µF X7R ceramic capacitors (0805) TDK C2012X7R1H104K R206 1 45.3kΩ ±1% resistor (0805) Vishay CRCW080545K3FKEA C4, C215 2 Ceramic capacitors (0805), do not populate R207 1 10kΩ ±1% resistor (0805) Vishay CRCW0805010KFKTA C201, C202, C204 3 10µF X7R ceramic capacitors (0805) TDK C2012X7R1A106K R210 1 4.
PAGE 3
MAX31865 Evaluation Kit Evaluates: MAX31865 Component Suppliers SUPPLIER PHONE WEBSITE AVX Corporation 843-946-0238 www.avx.com Keystone Electronics Corp. 209-796-2032 www.keyelco.com Kingbright Corporation 909-468-0500 www.kingbrightusa.com Molex 800-786-6539 www.molex.com Phoenix Contact 800-808-7177 www.phoenixcontact.com ROHM Co., Ltd. 858-625-3630 www.rohm.com TDK Corp. 847-803-6100 www.component.tdk.com Vishay 402-563-6866 www.vishay.
PAGE 4
MAX31865 Evaluation Kit Evaluates: MAX31865 Figure 1. MAX31865 EV Kit GUI (Registers Tab) Detailed Description of Software Device Configuration Upon successful completion of the setup procedure, the user is ready to begin evaluation of the device. The device powers up in “normally off” conversion mode. To begin conversions, first enable the VBIAS output by clicking the On radio button located in the MAX31865 Setup Info group box in the Registers tab (Figure 1).
PAGE 5
MAX31865 Evaluation Kit Evaluates: MAX31865 Figure 2. MAX31865 EV Kit GUI (Graphing/Data Tab) Reads Each register of the device can be read from the Registers tab of the GUI. Clicking a read button does a single read of the register and updates the associated data fields. There is also an option to do continuous reads of the device. This Polling feature is located in the top right section of the GUI. To start polling, select the delay between reads: 150ms, 300ms, 500ms, or 1000ms and click Start.
PAGE 6
MAX31865 Evaluation Kit Evaluates: MAX31865 Figure 3. MAX31865 Data Table registers can be set in the Fault Status group box with the associated input boxes and Write buttons. This data is input in hexadecimal format only. The master-initiated fault-detection cycle can be run from the Fault Status group box by selecting the corresponding button. Note that if using the Manual Timing Mode that once Step 1 has been selected it must be followed by selecting Step 2.
PAGE 7
MAX31865 Evaluation Kit Evaluates: MAX31865 Detailed Description of Hardware User-Supplied SPI Interface The USB-to-SPI master section of the EV kit is not necessary for the proper operation of the device. If the user wants to supply the SPI interface, the USB-to-SPI master section of the EV kit can be disconnected by removing resistors R7–R10. Connect test points SDO, CS, SCLK, SDI, and GND.
PAGE 8
MAX31865 Evaluation Kit Evaluates: MAX31865 Troubleshooting All efforts were made to ensure that each kit works on the first try, right out of the box. In the rare occasion that a problem is suspected, refer to the table below to help troubleshoot the issue. SYMPTOM GUI says hardware not found. RTD Data register reports all 00s or all FFs www.maximintegrated.com CHECK SOLUTION Is the D20 LED red? If yes, then the electronic fuse (U20) is in a fault state.
PAGE 9
--------> RTD <------- RTDIN- FORCE- VSENSE- IFORCE- 0.1uF C10 RTDIN+ PCB Layout Notes: 1. Place MAX31865 close to RTD terminal strip to minimize errors due to trace resistance 2. Use thick traces (more copper) for all 4 traces to RTD terminal strip 3. Balance trace lengths for all 4 traces to RTD terminal strip 4. Decoupling cap close to pin CON4 1 2 3 4 RTD Connect VSENSE+ R11 10M TP9 GND Reference Resistor Note: Populate one RRef Footprint (0805,1206, through Hole) footprints available.
PAGE 10
2 1 GND DNP C215 GND OSC_CMOS_4pin R214 R211 330 D21A 0 COM D22 R213 2.2K GND 220nF C213 560 R205 D20B 1 2 3 4 PICfor DS3900 MCLR P8,1W_PU P3,HB P7,1W_DQ COM_LED,BOOT P5 P1 USB_DET P2 VPO RCV VMO P6, CS P10,SCK,SCL GND P11,SDI,SDA OSC1 VDD OSC2 GND P4 P9,SDO UOE ENUM PS_VAR D+,VP VUSB D-,VM GND 10uF C202 U20 R204 56k 1 2 3 VPP 1 HB 2 COM 3 4 5 6 CS#_MASTER CS# 7 8 OSC1 9 10 11 12 13 14 3.
PAGE 11
MAX31865 Evaluation Kit Evaluates: MAX31865 Figure 6. MAX31865 EV Kit PCB Layout—Top Figure 7. MAX31865 EV Kit PCB Layout—Bottom www.maximintegrated.
PAGE 12
MAX31865 Evaluation Kit Evaluates: MAX31865 Ordering Information PART TYPE MAX31865EVKIT# EV Kit #Denotes an RoHS-compliant device that may include lead(Pb) that is exempt under the RoHS requirements. www.maximintegrated.
PAGE 13
MAX31865 Evaluation Kit Evaluates: MAX31865 Revision History REVISION NUMBER REVISION DATE 0 11/12 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.