TMP116 datasheet(32/46 Pages) TI2

32 / 46 page

5 k

TMP116

SDA

SCL

V+

GND

ADD0

ALERT

2-Wire Interface SMBus,

I²C Compatible Controller

SCL

SDA

INT

GND

1.9 V to 5.5 V

0.1 …F

GND

TMP116, TMP116N

SBOS740A – MAY 2017 – REVISED MAY 2019

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Product Folder Links: TMP116

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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 TMP116 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.

8.1.1 Typical Application

NOTE: The SDA and ALERT pins require pullup resistors.

Figure 41. Typical Connections

8.1.1.1 Design Requirements

The TMP116 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 TMP116 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 according temperature range, placed

as close as possible to the V+ pin of the TMP116. 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 or

indicates conversion end. It is recommended that the ALERT pin be connected to ground.

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