Diode

Temp.

Sensor

DS

A/D

Converter

OSC

Control

Logic

Serial

Interface

Config.

andTemp.

Register

TMP112

Temperature

SCL

1

3

6

4

ALERT

SDA

GND

2

5

V+

ADD0

9

TMP112

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SBOS473F – MARCH 2009 – REVISED FEBRUARY 2018

Product Folder Links: TMP112

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7 Detailed Description

7.1 Overview

The TMP112 family of devices are digital temperature sensors that are optimal for thermal-management and

device is specified over an operating temperature range of –40°C to 125°C. Figure 8 shows a block diagram of

the TMP112 family. Figure 9 shows the ESD protection circuitry contained in the TMP112 family.

The temperature sensor in the TMP112 family is the chip itself. Thermal paths run through the package leads as

well as the plastic package. The package leads provide the primary thermal path because of the lower thermal

resistance of the metal.

An alternative version of the TMP112 family is available. The TMP102 device has reduced accuracy, the same

micro-package, and is pin-to-pin compatible.

Table 1. Advantages of TMP112 family Versus TMP102

DEVICE

COMPATIBLE

INTERFACES

PACKAGE

SUPPLY

CURRENT

SUPPLY

VOLTAGE

(MIN)

SUPPLY

VOLTAGE

(MAX)

RESOLUTION

LOCAL SENSOR

ACCURACY (MAX)

SPECIFIED

CALIBRATION

DRIFT SLOPE

TMP112

family

SMBus

SOT563

1.2 × 1.6 × 0.6

10 µA

1.4 V

3.6 V

12 Bit

0.0625°C

0.5°C: (0°C to 65°C)

1°C: (-40°C to 125°C)

Yes

TMP102

SMBus

SOT563

1.2 × 1.6 × 0.6

10 µA

1.4 V

3.6 V

12 Bit

0.0625°C

2°C: (25°C to 85°C)

3°C: (-40°C to 125°C)

No

7.2 Functional Block Diagrams

Figure 8. Internal Block Diagram