LMT01 Datasheet, PDF (1/27 Pages) Texas Instruments – 0.5°C Accurate 2-Pin Digital Output Temperature Sensor with Pulse Count Interface

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LMT01
SNIS189A – JUNE 2015 – REVISED JUNE 2015
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 (max)
– 90°C to 150°C: ±0.62°C (max)
– –50°C to –20°C: ±0.7°C (max)
• Precision Digital Temperature Measurement
Simplified in a 2-Pin Package
• Single-wire Pulse Count Digital Output Easily
Read with Processor Timer Input
• Number of Output Pulses is Proportional to
Temperature with 0.0625°C Resolution
• Communication Frequency: 88 kHz
• Continuous Conversion Plus Data-Transmission
Period: 100 ms
• Conversion Current: 34 µA
• Floating 2 V to 5.5 V (VP–VN) Supply Operation
with Integrated EMI Immunity
• 2-Pin Package Offering TO-92/LPG (3.1 mm × 4
mm × 1.5 mm) – ½ the Size of Traditional TO-92
2 Applications
• Digital Output Wired Probes
• White Goods
• HVAC
• Power Supplies
• Industrial Internet of Things (IoT)
• Automotive
• Battery Management
3 Description
The LMT01 is a high-accuracy, 2-pin temperature
sensor with an easy-to-use pulse count interface
which makes it an ideal digital replacement for PTC
or NTC thermistors both on and off board 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 achieves flat ±0.5°C accuracy with very fine
resolution (0.0625°C) over a wide temperature range
of -20°C to 90°C without system calibration or
hardware/software compensation.
Unlike other digital IC temperature sensors, LMT01’s
single wire 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 ideal for on-board and off-board
temperature sensing. The LMT01 offers all the
simplicity of analog NTC or PTC thermistors with the
added benefits of a digital interface, wide specified
performance, EMI immunity, and minimum processor
resources.
PART NUMBER
LMT01
Device Information
PACKAGE
BODY SIZE (NOM)
TO-92 / LPG (2) 4.00 mm × 3.15 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
V_DD: 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
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 75 100 125 150
LMT01 Junction Temperaure (ƒC)
C014
Typical units plotted in center of curve.
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.