LMT01 (ACTIVE)

0.5°C Accurate 2-pin Temperature Sensor with a Pulse Train Interface

 

Description

The LMT01 device is a high-accuracy, 2-pin temperature sensor with an easy-to-use pulse count current loop interface, which makes it suitable for onboard and offboard applications in automotive, industrial, and consumer markets. The LMT01 digital pulse count output and high accuracy over a wide temperature range allow pairing with any MCU without concern for integrated ADC quality or availability, while minimizing software overhead. TI’s LMT01 device achieves a maximum ±0.5°C accuracy with very fine resolution (0.0625°C) over a temperature range of –20°C to 90°C without system calibration or hardware and software compensation.

The LMT01’s pulse count interface is designed to directly interface with a GPIO or comparator input, thereby simplifying hardware implementation. Similarly, the LMT01’s integrated EMI suppression and simple 2-pin architecture makes it suitable for onboard and offboard temperature sensing in a noisy environment. The LMT01 device can be easily converted into a two-wire temperature probe with a wire length up to two meters. See LMT01-Q1 for the automotive qualified version.

Features

  • High Accuracy Over –50°C to 150°C Wide Temperature Range
    • –20°C to 90°C: ±0.5°C (Maximum)
    • 90°C to 150°C: ±0.625°C (Maximum)
    • –50°C to –20°C: ±0.7°C (Maximum)
  • Precision Digital Temperature Measurement Simplified in a 2-Pin Package
  • Pulse Count Current Loop Easily Read by Processor. Number of Output Pulses is Proportional to Temperature With 0.0625°C Resolution
  • Communication Frequency: 88 kHz
  • Conversion Current: 34 µA
  • Continuous Conversion Plus Data-Transmission Period: 100 ms
  • Floating 2-V to 5.5-V (VP–VN) Supply Operation With Integrated EMI Immunity
  • Multiple 2-Pin Package Offerings: TO-92/LPG (3.1 mm × 4 mm × 1.5 mm) – ½ the Size of Traditional TO-92 and WSON With Wettable Flanks

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Parametrics Compare all products in Cable & Probe Temperature Sensors

 
Local Sensor Accuracy (Max) (+/- C)
Temp Resolution (Max) (bits)
Operating Temperature Range (C)
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Supply Current (Typ) (uA)
Interface
Features
LMT01 TMP103 TMP104 TMP107
0.5    2    2    0.4   
13    8    8    14   
-50 to 150    -40 to 125    -40 to 125    -55 to 125   
2    1.4    1.4    1.7   
5.5    3.6    3.6    5.5   
34    1.5    1.5    16   
Pulse Count    I2C, SMBus, 2-Wire    UART    UART   
2 pin package    One-Shot Conversion
Shutdown   
Programmable Alert
Window Comparator
Shutdown   
Shutdown   

Other qualified versions of LMT01

Version Part Number Definition
Automotive LMT01-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects