TMP112x High-Accuracy, Low-Power, Digital Temperature Sensors With SMBus and

Two-Wire Serial Interface in SOT563 and X2SON Packages

1 Features

• TMP112A Accuracy Without Calibration:

– ±0.5°C (Maximum) From 0°C to +65°C (3.3V)

– ±1.0°C (Maximum) From –40°C to +125°C

• TMP112B Accuracy Without Calibration:

– ±0.5°C (Maximum) From 0°C to +65°C (1.8V)

– ±1.0°C (Maximum) From –40°C to +125°C

• TMP112N Accuracy Without Calibration:

– ±1.0°C (Maximum) From –40°C to +125°C

• TMP112Dx Accuracy Without Calibration:

– ±0.5°C (Maximum) From -25°C to 85°C (V+ ≥

1.5V)

– ±1.0°C (Maximum) From –40°C to 125°C

• SOT563 Package (1.6mm × 1.6mm)

• X2SON Package (0.8mm × 0.8mm)

• Low Quiescent Current:

– 10-μA Active (Maximum), 1-μA Shutdown

(Maximum)

• Supply Range: 1.4V to 3.6V

• Resolution: 12 Bits

• Digital Output: SMBus™, Two-Wire, and I 2C

Interface Compatibility

• NIST Traceable

2 Applications

• Building automation

– Occupancy detection

– Video doorbell

– HVAC: Wireless environmental sensor

• Factory automation & control

– Machine vision camera

– Industrial PC: Single board computer

– CPU (PLC controller)

• Cold chain

• Data center & enterprise computing

– Solid state drive (SSD)

– Rack Server Motherboard

• Personal electronics

– PC & notebooks, tablets

– Digital still & video camera

– Augmented reality glasses

– Smart speakers

3 Description

The TMP112 family of devices are digital temperature

sensors designed for high-accuracy, low-power,

NTC/PTC

thermistor

replacements

where

high

accuracy is required. The TMP112A, TMP112B,

TMP112Dx offer 0.5°C accuracy and are optimized to

provide the best PSR performance for 3.3V, 1.8V and

≥1.5V operation respectively, while TMP112N offers

1°C accuracy. These temperature sensors are highly

linear and do not require complex calculations or

lookup tables to derive the temperature. The on-chip

12-bit ADC offers resolutions down to 0.0625°C.

The 1.6mm × 1.6mm SOT563 package is 68%

smaller footprint than an SOT23 package while

TMP112Dx

utilizes

ultra-small

(0.64mm2)

5-pin

package. The TMP112 family features SMBus, two-

wire and I2C interface compatibility, and allows up to

four devices on one bus. The device also features

an SMBus alert function or variant. The device is

specified to operate over supply voltages from 1.4V

to 3.6V with the typical quiescent current 3.2µA over

the full operating range.

The TMP112 family is designed for extended

temperature

measurement

in

communication,

computer, consumer, environmental, industrial, and

instrumentation applications. The device is specified

for operation over a temperature range of –40°C to

125°C.

The TMP112 family production units are 100%

tested against sensors that are NIST-traceable and

are verified with equipment that are NIST-traceable

through ISO/IEC 17025 accredited calibrations.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

TMP112A/B/N

SOT563 (6)

1.6mm × 1.6mm

TMP112Dx

X2SON (5)

0.8mm × 0.8mm

(1)

For more information, see Section 11.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

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

Block Diagram (SOT563 Package)

TMP112

SBOS473J – MARCH 2009 – REVISED FEBRUARY 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

without notice.