LMT01_17 Datasheet, PDF (1/39 Pages) Texas Instruments – Accurate 2-Pin Digital Output Temperature Sensor with Pulse Count Interface

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LMT01
SNIS189B – JUNE 2015 – REVISED APRIL 2017
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: ±0.625°C (max)
– –50°C to –20°C: ±0.7°C (max)
• 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
• 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
• 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
• Industrial Internet of Things (IoT)
• Battery Management
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 on
and off board 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/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 on-
board and off-board 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 / LPG (2)
4.00 mm × 3.15 mm
LMT01DQX
WSON / DQX (2) 1.7 mm x 2.5 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.