1 Features

1• Accuracy:

– ±0.05°C (typ) or ±0.13°C (max) from 20°C to

42°C

– ±0.2°C (max) from -20°C to 90°C

– ±0.23°C (max) from 90°C to 110°C

– ±0.36°C (max) from -55°C to 150°C

• Wide Temperature Range: −55°C to 150°C

• Matching of Two Adjacent LMT70A on Tape and

Reel: 0.1°C (max) at 30°C

• Very Linear Analog Temperature Sensor with

Output Enable Pin

• NTC Output Slope: -5.19 mV/°C

• Output On/Off Switch with RDS on < 80 Ω

• Wide Power Supply Range: 2.0 V to 5.5 V

• Low Power Supply Current: 9.2 μA (typ)12 μA

(max)

• Ultra Small 0.88 mm by 0.88 mm 4-bump WLCSP

(DSBGA) Package

2 Applications

• Internet of Things (IoT) Sensor Nodes

• Industrial RTD (Class AA) or Precision NTC/PTC

Thermistor Replacement

• Medical/Fitness Equipment

• Medical Thermometer

• Human Body temperature monitor

• Metering Temperature Compensation

3 Description

The LMT70 is an ultra-small, high-precision, low-

power CMOS analog temperature sensor with an output enable pin. Applications for the LMT70 include

virtually any type of temperature sensing where cost-

effective, high precision and low-power are required,

such as Internet of Things (IoT) sensor nodes,

medical thermometers, high-precision instrumentation and battery powered devices. The LMT70 is also a

great replacement for RTD and precision NTC/PTC

thermistors.

Its output enable pin allows multiple LMT70s to share

one ADC channel, thus simplifying ADC calibration

and reducing the overall system cost for precision

temperature sensing. The LMT70 also has a linear and low impedance output allowing seamless

interface to an off-the-shelf MCU/ADC. Dissipating

less than 36μW, the LMT70 has ultra-low self-heating

supporting its high-precision over a wide temperature

range.

The LMT70A provides unparalleled temperature

matching performance of 0.1°C (max) for two

adjacent LMT70A's picked from the same tape and

reel. Therefore, the LMT70A is an ideal solution for energy metering applications requiring heat transfer

calculations.