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TMP05ART-REEL

±0.5°C Accurate PWM Temperature Sensor in 5-Lead SC-70

Analog Devices 

CONTINUOUSLY CONVERTING APPLICATION

This section provides an example of how to connect one

TMP05 in continuously converting mode to a microchip

PIC16F876 microcontroller. Figure 37 shows how to interface to

the PIC16F876.

TMP05 Program Code Example 2 shows how to communicate

from the microchip device to the TMP05. This code can also be

used with other PICs by simply changing the include file for the

part.

TMP05/TMP06

FIRST TEMP

MEASUREMENT

SECOND TEMP

MEASUREMENT

T0

TIME

PIC16F876

PA.0

TMP05

OUT

VDD

3.3V

CONV/IN

0.1µF

FUNC GND

Figure 37. Typical Daisy-Chain Application Circuit

TMP05 Program Code Example 2

//=============================================================================================

//

// Description : This program reads the temperature from a TMP05 part set up in continuously

// converting mode.

// This code was written for a PIC16F876, but can be easily configured to function with other

// PICs by simply changing the include file for the part.

//

//

Fosc = 4MHz

//

Compiled under CCS C compiler IDE version 3.4

//

PWM output from TMP05 connected to PortA.0 of PIC16F876

//

//============================================================================================

#include <16F876.h>

// Insert header file for the particular PIC being used

#device adc=8

#use delay(clock=4000000)

#fuses NOWDT,XT, PUT, NOPROTECT, BROWNOUT, LVP

//_______________________________Wait for high function_____________________________________

void wait_for_high() {

while(input(PIN_A0)) ;

/* while high, wait for low */

while(!input(PIN_A0));

/* wait for high */

}

//______________________________Wait for low function_______________________________________

void wait_for_low() {

while(input(PIN_A0));

/* wait for high */

}

//_______________________________Main begins here____________________________________________

void main(){

long int high_time,low_time,temp;

setup_adc_ports(NO_ANALOGS);

setup_adc(ADC_OFF);

setup_spi(FALSE);

setup_timer_1 ( T1_INTERNAL | T1_DIV_BY_2);

//Sets up timer to overflow after 131.07ms

Rev. 0 | Page 23 of 28

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