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LMT01 Datasheet

Accurate 2-Pin Digital Output Temperature Sensor

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LMT01
SNIS189D – JUNE 2015 – REVISED JUNE 2018
LMT01 0.5°C Accurate 2-Pin Digital Output Temperature Sensor With Pulse Count
Interface
1 Features
1 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
2 Applications
• Digital Output Wired Probes
• White Goods
• HVAC
• Power Supplies
• Battery Management
LMT01 Accuracy
1.0
0.8 Max Limit
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8 Min Limit
-1.0
±50 ±25
0
25 50 75 100 125
LMT01 Junction Temperaure (ƒC)
Typical units plotted in center of curve.
150
C014
3 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMT01LPG
TO-92 (2)
4.00 mm × 3.15 mm
LMT01DQX
WSON (2)
1.70 mm × 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
2-Pin IC Temperature Sensor
VP
LMT01
Up to 2m
Min 2.0V
VDD: 3.0V to 5.5V
GPIO
MCU/
FPGA/
ASIC
VN
Power Off
LMT01 Pulse Count Interface
Conversion Time
ADC Conversion Result
GPIO/
COMP
Power On
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

LMT01 Datasheet Preview

LMT01 Datasheet

Accurate 2-Pin Digital Output Temperature Sensor

No Preview Available !

LMT01
SNIS189D – JUNE 2015 – REVISED JUNE 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions ...................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Electrical Characteristics - TO-92/LPG Pulse Count
to Temperature LUT................................................... 6
6.7 Electrical Characteristics - WSON/DQX Pulse Count
to Temperature LUT................................................... 7
6.8 Switching Characteristics .......................................... 7
6.9 Timing Diagram......................................................... 8
6.10 Typical Characteristics ............................................ 9
7 Detailed Description ............................................ 13
7.1 Overview ................................................................. 13
7.2 Functional Block Diagram ....................................... 13
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 16
8 Application and Implementation ........................ 17
8.1 Application Information............................................ 17
8.2 Typical Application .................................................. 18
8.3 System Examples .................................................. 20
9 Power Supply Recommendations...................... 22
10 Layout................................................................... 23
10.1 Layout Guidelines ................................................. 23
10.2 Layout Example .................................................... 23
11 Device and Documentation Support ................. 24
11.1 Receiving Notification of Documentation Updates 24
11.2 Community Resources.......................................... 24
11.3 Trademarks ........................................................... 24
11.4 Electrostatic Discharge Caution ............................ 24
11.5 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
Changes from Revision C (June 2017) to Revision D
Page
• Added device stamp to the TO-92 pinout top view ................................................................................................................ 3
• Changed the TO-92S pin numbers in the Pin Functions........................................................................................................ 3
Changes from Revision B (April 2017) to Revision C
Page
• Removed Electrical Characteristics: WSON/DQX table; Combined the LPG and DQX Electrical Characteristics
tables together ........................................................................................................................................................................ 5
• Changed IOL maximum value from: 39 µA to: 40 µA .............................................................................................................. 5
• Changed leakage value from: 1 µA to 3.5 µA ........................................................................................................................ 5
• Moved the thermal response time parameters to the Electrical Characteristics table ........................................................... 5
• Added Missing Cross References ........................................................................................................................................ 13
Changes from Revision A (June 2015) to Revision B
Page
• Added new WSON/DQX package throughout data sheet ..................................................................................................... 1
• Changed updated package information. ................................................................................................................................ 3
• Added Electrical Characteristics - WSON/DQX Pulse Count to Temperature LUT ............................................................... 7
• Added -40 for Sample Calculations Table ........................................................................................................................... 14
• Added missing cross reference ........................................................................................................................................... 15
Changes from Original (June 2015) to Revision A
Page
• Added full datasheet. ............................................................................................................................................................. 1
• Added clarification note. ........................................................................................................................................................ 1
2 Submit Documentation Feedback
Product Folder Links: LMT01
Copyright © 2015–2018, Texas Instruments Incorporated


Part Number LMT01
Description Accurate 2-Pin Digital Output Temperature Sensor
Maker etcTI
Total Page 30 Pages
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