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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 0.1 Operating temperature range (C) -55 to 150 Supply voltage (Min) (V) 2 Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 12 Interface type Analog output Sensor gain (mV/Deg C) -5.19 Rating Catalog open-in-new Find other Analog temperature sensors

Package | Pins | Size

DSBGA (YFQ) 4 0 mm² .924 x .924 open-in-new Find other Analog temperature sensors

Features

  • 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

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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.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet LMT70, LMT70A ±0.05°C Precision Analog Temperature Sensor, RTD and Precision NTC Thermistor IC datasheet (Rev. A) May 11, 2015
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
Application notes SC Temp Sensors Challenge Precision RTDs and Thermistors in Build Automation (Rev. A) May 08, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description

The LMT70EVM allows users to evaluate the performance of the LMT70 temperature sensor. The EVM comes in a USB stick form factor package with an onboard MSP430F5528 microcontroller that interfaces with both the USB port and the LMT70 device. The EVM also comes with perforated slots that the user can (...)

Features
  1. Evaluate LMT70 analog temperature sensor performance
  2. Perforated slots to break apart LMT70 device from MSP430 microcontroller
  3. EVM comes in a USB stick form factor
  4. Easy to use GUI

Software development

SUPPORT SOFTWARE Download
SNIC010B.ZIP (166291 KB)

Reference designs

REFERENCE DESIGNS Download
Matched Precision Temperature Sensing Reference Design for Heat Cost Allocators
TIDA-00646 The TIDA-00646 reference design demonstrates techniques for precision temperature sensing as required by heat cost llocators and other Internet of Things (IoT) applications. Heat cost allocators use the temperature differential between Room and Heater body to assign a share of the total cost of a (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Heat Cost Allocator with wM-Bus at 868 MHz Reference Design
TIDA-00838 The TIDA-00838 reference design implements a heat cost allocator system following the EN834 standard with the “two-sensor measurement method". The solution achieves better than 0.5 degrees Celsius accuracy across a range of +20 to +85°C. Two analog temperature sensors are available as (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Single Bidirectional Infrared LED Communication Port Reference Design
TIDA-01212 — The TIDA-01212 reference design provides a ultra-low power yet simple and low-cost solution for adding a bi-directional IrDA PHY link at 9600 bps to any Smart Metering or sub-metering device. Using a single IR LED, a resistor and internal 1.27 V reference, controlled by an optimized software inside (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Reference Design for Segment LCD Control Using GPIO Pins to Increase System Flexibility
TIDA-00848 — The TIDA-00848 reference design provides an innovative solution for adding LCD functionality to any Smart Grid or IoT application, where seven-segment LCD operation is required but the LCD dsiplay does not have to be always on. Using a few resistors and optimized GPIO control software on a CC1310 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YFQ) 4 View options

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