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Sensores de temperatura analógicos

LMT90

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Sensor de temperatura de salida analógica positiva de +10,0 mV/°C de ganancia

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LMT90

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Detalles del producto

Local sensor accuracy (max) 4 Rating Catalog Operating temperature range (°C) -40 to 125 Supply current (max) (µA) 130 Interface type Analog output Sensor gain (mV/°C) 10 Features Industry standard pinout
Local sensor accuracy (max) 4 Rating Catalog Operating temperature range (°C) -40 to 125 Supply current (max) (µA) 130 Interface type Analog output Sensor gain (mV/°C) 10 Features Industry standard pinout
SOT-23 (DBZ) 3 6.9204 mm² (2.92 mm × 2.37 mm)
  • Industry-Standard Sensor Gain/Offset:
    • 10mV/°C, 500mV at 0°C
    • Drop-in functional equivalent to LM50C
  • LMT90 Temperature Accuracy:
    • ±3°C (Max) at 25°C
    • ±4°C (Max) over −40°C to +125°C
  • Operating supply range: 4.5V to 10V
  • Quiescent Current (Typ): 95µA
  • Available in Standard SOT23-3 package
  • Nonlinearity: ±0.8°C (Max)
  • DC Output Impedance: 2kΩ/4kΩ (typ/Max)
    • Enables driving large capacitive loads
  • Cost-Effective Alternative to Thermistors
  • Industry-Standard Sensor Gain/Offset:
    • 10mV/°C, 500mV at 0°C
    • Drop-in functional equivalent to LM50C
  • LMT90 Temperature Accuracy:
    • ±3°C (Max) at 25°C
    • ±4°C (Max) over −40°C to +125°C
  • Operating supply range: 4.5V to 10V
  • Quiescent Current (Typ): 95µA
  • Available in Standard SOT23-3 package
  • Nonlinearity: ±0.8°C (Max)
  • DC Output Impedance: 2kΩ/4kΩ (typ/Max)
    • Enables driving large capacitive loads
  • Cost-Effective Alternative to Thermistors

The LMT90 device is a cost-optimized precision analog temperature sensor developed as a linear alternative to discrete thermistors. This device can measure temperatures from -40°C to 125°C using a single positive supply. The output voltage of the device is linearly proportional to temperature (10mV/°C) and has a DC offset of 500mV at 0°C. The offset allows reading negative temperatures without the need for a negative supply. The output voltage of the LMT90 ranges from 100mV (at –40°C) to 1.75V (at 125°C), simplifying analog-to-digital converter (ADC) interfacing.

The LMT90 is a drop-in equivalent to LM50C and does not require any external calibration, trimming or software linearization leading to simplifying the circuitry requirements in a single supply environment. Due to low quiescent current of LMT90 (typically around 95µA), self-heating is limited to a very low 0.2°C (in still air). This device is suitable for HVAC, appliance, and consumer electronics applications. Trimming and calibration of the LMT90 at the wafer level supports long-term availability, low cost and consistent accuracy (±3°C at 25°C, ±4°C over temperature range).

The LMT90 device is a cost-optimized precision analog temperature sensor developed as a linear alternative to discrete thermistors. This device can measure temperatures from -40°C to 125°C using a single positive supply. The output voltage of the device is linearly proportional to temperature (10mV/°C) and has a DC offset of 500mV at 0°C. The offset allows reading negative temperatures without the need for a negative supply. The output voltage of the LMT90 ranges from 100mV (at –40°C) to 1.75V (at 125°C), simplifying analog-to-digital converter (ADC) interfacing.

The LMT90 is a drop-in equivalent to LM50C and does not require any external calibration, trimming or software linearization leading to simplifying the circuitry requirements in a single supply environment. Due to low quiescent current of LMT90 (typically around 95µA), self-heating is limited to a very low 0.2°C (in still air). This device is suitable for HVAC, appliance, and consumer electronics applications. Trimming and calibration of the LMT90 at the wafer level supports long-term availability, low cost and consistent accuracy (±3°C at 25°C, ±4°C over temperature range).
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TMP235 ACTIVO Sensor de temperatura analógico de 1 °C y 10 mV/°C Higher accuracy (±1°C) in a 3-pin SOT-23 package or smaller 5-pin SOT-SC70 package
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ISOTMP35 ACTIVO Sensor de temperatura aislado básico de 1.2 °C con salida analógica de 10 mV/°C First-in-market integrated isolation with the same sensor gain (10 mV/°C). Higher accuracy (±1.2°C) and wider temperature range (-40 to 150°C).

Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LMT90 Industry-Standard, ±3°C Accurate, Analog Centigrade (10mV/°C) Temperature Sensor in SOT-23 Package datasheet (Rev. C) PDF | HTML 20/05/2025
Nota sobre la aplicación SC Temp Sensors Challenge Precision RTDs and Thermistors in Build Automation (Rev. A) 8/05/2019
Más documentación Analog Temperature Sensors 18/04/2013
Guía del usuario LMT90 User Guide 31/01/2013

Diseño y desarrollo

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Placa de evaluación

LMT90EVM — Módulo de evaluación del sensor de temperatura LMT90EVM

The Texas Instruments LMT90EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMT90 analog temperature sensor.

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