TMP117 datasheet(31/45 Pages) TI1

31 / 45 page

5 k

TMP117

SDA

SCL

V+

GND

ADD0

ALERT

2-Wire Interface SMBus,

I²C Compatible Controller

SCL

SDA

INT

GND

1.9 V to

3.6 V

0.1 …F

GND

TMP117

www.ti.com

SNOSD82 – JUNE 2018

Product Folder Links: TMP117

Submit Documentation Feedback

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The TMP117 is used to measure the temperature of the board location where the device is mounted. The

programmable address options allow up to four locations on the board to be monitored on a single serial bus. For

more information, refer to the related TMP116 Ambient Air Temperature Measurement (SNOA966), Replacing

Resistance Temperature Detectors with the TMP116 Temp Sensor (SNOA969), and Temperature Sensors: PCB

Guidelines for Surface Mount Devices (SNOA967) application reports on ti.com.

8.1.1 Typical Application

NOTE: The SDA and ALERT pins require pullup resistors.

Figure 36. Typical Connections

8.1.1.1 Design Requirements

The TMP117 operates only as a slave device and communicates with the host through the I2C-compatible serial

interface. SCL is the input pin, SDA is a bidirectional pin, and ALERT is the output. The TMP117 requires a

pullup resistor on the SCL, SDA, and ALERT pins. The recommended value for the pullup resistors is 5 kΩ. In

some applications the pullup resistor can be lower or higher than 5 kΩ. A 0.1-µF bypass capacitor is

recommended to be connected between V+ and GND. An SCL pullup resistor is required if the system

microprocessor SCL pin is open-drain. Use a ceramic capacitor type with a temperature rating from –40°C to

+125°C, placed as close as possible to the V+ pin of the TMP117. The decoupling capacitor reduces any noise

induced by the system. When connected directly to GND, V+, SDA, and SCL, use the ADD0 pin for address

selection for configuring four possible unique slave ID addresses. Table 1 explains the addressing scheme. The

ALERT output pin can be connected to a microcontroller interrupt that triggers an event that occurred when the

temperature limit exceeds the programmable value in registers 02h and 03h. The ALERT pin can be left floating

if not in use or connected to ground.

TMP117 Datasheet(PDF) 31 Page - Texas Instruments

TMP117 Datasheet(HTML) 31 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

Datasheet Download

Link URL