LM50 and LM50HV Industry-Standard, Analog Centigrade (10mV/°C) Temperature

Sensor in the SOT-23 Package

1 Features

• Industry-Standard Sensor Gain/Offset:

– 10mV/°C, 500mV at 0°C

• LM50HV (Next-generation):

– Drop-in replacement for LM50B/LM50C

– Wide supply range: 3V to 36V

– Temperature Accuracy:

• ±2°C (Max) over 20°C to 70°C

• ±2.5°C (Max) over -10°C to 125°C

• ±3°C (Max) over -20°C to 150°C

– Quiescent Current (Typ): 52μA

– Nonlinearity: ±1.2°C (Max)

• LM50:

– Operating supply range: 4.5V to 10V

– LM50B Temperature Accuracy:

• ±2°C (Max) at 25°C

• ±3°C (Max) over temperature range

– LM50C Temperature Accuracy:

• ±3°C (Max) at 25°C

• ±4°C (Max) over temperature range

– Quiescent Current (Typ): 95μA

– Nonlinearity: ±0.8°C (Max)

• Available in Standard SOT23-3 package

• DC Output Impedance: 2kΩ/4kΩ (Typ/Max)

– Enables driving large capacitive loads

• Designed for LDO-less applications

• UL Recognized Component (LM50B, LM50C)

2 Applications

• Mobile phones, PC & notebooks, Data storage

• Battery Management

• Home and Multifunction printers

• Medical and healthcare Instruments

• HVAC System

• Power Supply Modules

3 Description

The LM50 and LM50HV devices are precision analog

temperature sensors that can measure temperatures

from -40°C to 125°C (for LM50) and -40°C to

150°C (for LM50HV) using a single positive supply.

Unlike NTC thermistors, LM50 and LM50HV do not

require any external calibration, trimming or software

linearization leading to simplifying the circuitry

requirements. The output voltage of the devices

are linearly proportional to temperature (10mV/°C)

and has a DC offset of 500mV at 0°C. The offset

allows reading negative temperatures without the

need for a negative supply. The output voltage of the

LM50 and LM50HV ranges from 100mV (at -40°C)

to 1.75V (at 125°C for LM50) and 2V (at 150°C

for LM50HV), simplifying analog-to-digital converter

(ADC) interfacing.

LM50HV is designed for LDO-less application due

to stable functionality across wide supply range of

3V to 36V. Trimming and calibration of the LM50

and LM50HV at the wafer level provide long-term

availability, low cost and consistent accuracy: LM50B

(±3°C over temperature range), LM50C (±4°C over

temperature range) and LM50HV (±3°C over -20°C to

150°C).

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

LM50 and LM50HV

DBZ (SOT-23, 3)

2.37mm × 2.92mm

(1)

For more information, see Section 11.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

GND

VO

+VS

Thermal Diodes

2k

+

–

MSPM0

MCU

ADC

CLoad

GND

VCC

VCC

CBypass

LM50

LM50HV

Simplified Schematic

DUT Te mperature (C)

-50

-25

0

25

50

75

100

125

150

0

0.25

0.5

0.75

1

1.25

1.5

1.75

2

1.75V

0.75V

0.1V

Full-Range Temperature Sensor LM50 (–40°C to

125°C) and LM50HV (–40°C to 150°C)

LM50, LM50HV

SNIS118I – JULY 1999 – REVISED OCTOBER 2025

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.