LMT01 0.5°C Accurate 2-pin Temperature Sensor with a Pulse Train Interface | TI.com

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

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Part number Order Device type Interface Local sensor accuracy (Max) (+/- C) Temp resolution (Max) (bits) Operating temperature range (C) Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Max) (uA) Features Remote channels (#) Addresses Rating Package Group Package size: mm2:W x L (PKG)
LMT01 Order now Local     Pulse Count     0.5     13     -50 to 150     2     5.5     39     2 pin package     0    
   
Catalog     TO-92 | 2
WSON | 2    
2TO-92: 6 mm2: 1.52 x 4 (TO-92 | 2)
See datasheet (WSON)    
TMP104 Order now Local     UART     2     8     -40 to 125     1.4     3.6     85     Programmable Alert
Window Comparator
Shutdown    
0     16     Catalog     DSBGA | 4     See datasheet (DSBGA)    
TMP107 Order now Local     UART     0.4     14     -55 to 125     1.7     5.5     35     Shutdown     0     32     Catalog     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
TMP144 Order now   UART     1     12     -40 to 125     1.4     3.6     3     Daisy Chain       16     Catalog     DSBGA | 4     See datasheet (DSBGA)