TMP110 datasheet(28/44 Pages) TI

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9 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, as well as validating and testing their design

implementation to confirm system functionality.

9.1 Application Information

The TMP113 can be operated with a two-wire I2C or SMBus compatible interface and features the ability to

operate with a 1.4V to 5.5V bus voltage. The TMP113 features a uniquely small size of 1.5mm × 1mm with a

0.525mm z-height.

9.2 Equal I2C Pullup and Supply Application

Controller

SCL

SDA

V+ =1.4V to 5.5V

ALERT

SCL

V+

GND

ADD0

SDA

ALERT

V+

Temperature

Source

GND

10nF

Figure 9-1. Equal I2C Pullup and Supply Voltage Application

9.2.1 Design Requirements

For this design example, use the parameters listed below.

Table 9-1. Design Parameters

PARAMETER

VALUE

Supply (V+)

1.4V to 5.5V

SDA, SCL VPULLUP

≥ V+

SDA, SCL RPULLUP

≥ 5kΩ

ALERT RPULLUP

≥ 5kΩ (20kΩ is preferred)

9.2.2 Detailed Design Procedure

The SDA and SCL pin voltage of the TMP113 can be the same as the supply voltage V+. The accuracy of

the TMP113 is not affected by the pullup voltage. However, using a minimal SDA and ALERT pins pull-up

current is recommended to prevent self-heating and temperature accuracy reduction. In addition, to minimize

measurement noise, having communication on the I2C bus during temperature conversion is not recommended.

9.2.3 Application Curve

Figure 9-2 shows the step response of the TMP113 to a submersion in an oil bath of 75ºC from room

temperature (25ºC). The time-constant, or the time for the output to reach 63% of the input step, is 0.2s (for

flexible PCB) and 1.1s (for rigid PCB). The time-constant result depends on the printed-circuit board (PCB) size

TMP113

SBOSAJ5 – DECEMBER 2024

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