TMP117 datasheet(9/45 Pages) TI1

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ADC

Oscillator

Bank

Serial

Interface

Control

Logic

ADD0

SCL

SDA

GND

V+

ALERT

EEPROM

Temperature

Sensor

Circuitry

Internal

Thermal

BJT

TMP117

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SNOSD82 – JUNE 2018

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7 Detailed Description

7.1 Overview

The TMP117 is a digital output temperature sensor that is optimal for thermal-management and thermal-

protection applications. The TMP117 is two-wire, SMBus, and I2C interface-compatible. The device is specified

over an operating temperature range of –55°C to +125°C. Figure 13 shows a block diagram of the TMP117.

7.2 Functional Block Diagrams

Figure 13. Internal Block Diagram

7.3 Feature Description

7.3.1 Power Up

After the supply voltage reaches within the operating range, the device requires 1.5 ms to power up before

conversions begin. The device can be programmed to start up in shutdown mode as well. See the EEPROM

Programming section for more information. The temperature register reads –256°C before the first conversion.

7.3.2 Temperature Result and Limits

At the end of every conversion, the device updates the temperature register with the conversion result. The data

reading in the result register is in two's complement format, has a data width of 16 bits, and a resolution of

7.8125 m°C. Table 1 shows multiple examples of possible binary data that can be read from the temperature

result register and the corresponding hexadecimal and decimal equivalents.

The TMP117 also has alert status flags and alert pin functionality that use the temperature limits stored in the low

limit register and high limit register. The same data format used for the temperature result register can be used

for data that are written to the high and low limit registers.

TMP117 Datasheet(PDF) 9 Page - Texas Instruments

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