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Analoge Temperatursensoren

LMT70

AKTIV

Snaloger Temperatursensor, 0,1 C, -5,19 mV/C, hochpräzise abgestimmte Paare, Ausgangsfreigabepin

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LMT70

AKTIV
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Produktdetails

Local sensor accuracy (max) 0.13 Operating temperature range (°C) -55 to 150 Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Supply current (max) (µA) 12 Interface type Analog output Sensor gain (mV/°C) -5.19 Rating Catalog
Local sensor accuracy (max) 0.13 Operating temperature range (°C) -55 to 150 Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Supply current (max) (µA) 12 Interface type Analog output Sensor gain (mV/°C) -5.19 Rating Catalog
DSBGA (YFQ) 4 1 mm² 1 x 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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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Technische Dokumentation

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Typ Titel Datum
* Data sheet LMT70, LMT70A ±0.05°C Precision Analog Temperature Sensor, RTD and Precision NTC Thermistor IC datasheet (Rev. A) PDF | HTML 11 Mai 2015
Application note Ultra-Small, Precision Analog Temperature Sensor Measurement With ADC (Rev. A) 24 Aug 2021
Technical article How to design an infrared thermometer quickly PDF | HTML 07 Apr 2020
Application note Temperature sensors: PCB guidelines for surface mount devices (Rev. A) 18 Jan 2019
Application note Wearable Temp-Sensing Layout Considerations Optimized for Thermal Response (Rev. B) 23 Okt 2018
Application note Design Considerations for Measuring Ambient Air Temperature (Rev. B) 10 Sep 2018
Technical article Real-time temperature sensing with dual-mode connectivity PDF | HTML 03 Nov 2016
Technical article Tips and tricks for human body temperature measurement with analog temperature sen PDF | HTML 08 Sep 2015

Design und Entwicklung

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Evaluierungsplatine

LMT70EVM — LMT70-Evaluierungsmodul für Präzisionstemperatursensor mit Analogausgang und Ausgangsfreigabe

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 (...)

Benutzerhandbuch: PDF
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Support-Software

SNIC010 — LMT70EVM Installer v1.4.0.0

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Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
Analoge Temperatursensoren
LMT70 — Snaloger Temperatursensor, 0,1 C, -5,19 mV/C, hochpräzise abgestimmte Paare, Ausgangsfreigabepin LMT70A — Analoger präziser Temperatursensor mit ±0,1°C Genauigkeit
Hardware-Entwicklung
Evaluierungsplatine
LMT70EVM — LMT70-Evaluierungsmodul für Präzisionstemperatursensor mit Analogausgang und Ausgangsfreigabe
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Simulationsmodell

LMT70 TINA-TI Reference Design

SNIM008.TSC (1774 KB) - TINA-TI Reference Design
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Simulationsmodell

LMT70 TINA-TI Spice Model

SNIM007.ZIP (9 KB) - TINA-TI Spice Model
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Referenzdesigns

TIDA-01576 — Referenzdesign für hochgenaues Analogeingangsmodul mit 16-Bit-A/D-Wandler mit 1 MSPS und simultaner

This reference design accurately measures 16-channel AC voltage and current inputs using a precision 16-bit SAR ADC over a wide input range. This range covers protection and measurement requirements (including sampling requirements as per IEC 61850-9-2), which simplifies system design and improves (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-010019 — Referenzdesign für RTD-Ersatz für Vergleichsstellenmessung in einem Temperatursensor

Temperature-sensing applications that use a thermocouple (TC) require an accurate local temperature sensor to achieve high accuracy. Solutions for design challenges such as cold-junction compensation (CJC) or including an ultra-low power TC analog front-end are highlighted and addressed in this (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-01214 — Isoliertes, hochpräzises Analog-Eingangsmodul-Referenzdesign mit 16-Bit-ADC und digitalem Isolator

This reference design provides accurate measurements of AC voltage and current inputs using a precision 16-bit SAR ADC over a wide input range, covering protection and measurement range (including sampling requirements of IEC 61850-9-2), simplifying system design and improving trip time (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00721 — Referenzdesign für passives NFC-Temperaturpflaster

TIDA-00721 is a complete reference design for accurate temperature measurements using a passive NFC tag in a flexible patch form factor. The system offers temperature readings from tag to a NFC receiver such as a NFC enabled smartphone. The high accuracy temperature sensor (LMT70) is interfaced (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00824 — Referenzdesign einer Lösung zur Hauttemperaturmessung für Wearable-Anwendungen

TIDA-00824 features LMT70 analog temperature sensor for measuring human skin temperature. This reference design shows how to mechanically mount the temperature sensor for best thermal conductivity. Signal path considerations on how to achieve greater than 0.1°C accuracy is also discussed in (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00452 — Referenzdesign einer Temperatursensorlösung für Wearables

This reference design demonstrates temperature sensing aimed at the wearables market. LMT70 temperature sensor is ideal for wearable devices due to its 0.13°C temperature accuracy at human body temperatures. Its small form WCSP package allows it to be heated up quickly and have a fast thermal (...)
Test report: PDF
Schaltplan: PDF
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