MAX31865 datasheet(4/13 Pages) MAXIM

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Maxim Integrated │ 4

MAX31865 Evaluation Kit

Evaluates: MAX31865

www.maximintegrated.com

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

Registerstab(Figure1).Next,enable

conversions by changing the

Conversion Mode to Auto

by clicking the

Auto radio button. It is now time to read the

results. This is accomplished by clicking the

Read button

in the

RTD Resistance Register group box. The conver-

sion results are displayed below the button in hex and

binary format. Also note that the ADC result is displayed

in decimal format. The RTD resistance is then calculated

from the ADC result and the value entered in the

RREF

Nominal Resistance edit box located in the MAX31865

Setup Infogroupbox.Withthesupplied1kΩresistor,the

calculatedRTDresistanceshouldbe1kΩ±6%duetothe

tolerance of the provided resistors.

Note: Since there is

not an RTD connected at this time, the RTD temperature

equations are not valid registers.

MAX31865 Datasheet(PDF) 4 Page - Maxim Integrated Products