TMP114 datasheet(39/50 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 TMP114 can be operated with a two-wire I2C or SMBus compatible interface and features the ability to

operate with a 1.2-V bus voltage regardless of the VDD voltage. The TMP114 features a uniquely small z-height

of 0.15 mm designed for low clearance and space-constrained applications.

The device also features an integrated optional CRC checksum for ensuring data integrity during

communication.

9.2 Separate I2C Pullup and Supply Application

VDD

GND

SDA

SCL

TMP114

0.1 µF

1.08 V to 1.98 V

1.2 kΩ

Controller

SDA

SCL

1.2 kΩ

1.2 V

Temperature

source

Figure 9-1. Separate 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 (VDD)

1.08 V to 1.98 V

SDA, SCL VPULLUP

1.2 V

SDA, SCL RPULLUP

1.2 kΩ

9.2.2 Detailed Design Procedure

The TMP114 will convert temperature at a default 250 ms interval with an adjustable conversion period between

6.4 ms and 2 s. The SDA and SCL pin voltage of the TMP114 can be at a higher voltage than the VDD pin

voltage, removing the need for power sequencing when using the TMP114.

The TMP114 comes in an ultra-small body and z-height package the user can place as close to temperature

sources as possible for better thermal coupling.

www.ti.com

TMP114

SNIS214A – JUNE 2021 – REVISED SEPTEMBER 2021

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