LM50, LM50-Q1

SNIS118E – JULY 1999 – REVISED SEPTEMBER 2013

LM50/LM50-Q1 SOT-23 Single-Supply Centigrade Temperature Sensor

Check for Samples: LM50, LM50-Q1

1

FEATURES

DESCRIPTION

The LM50/LM50-Q1 is a precision integrated-circuit

2

•

Calibrated Directly in Degree Celsius

temperature sensor that can sense a

−40°C to

(Centigrade)

+125°C temperature range using a single positive

•

Linear + 10.0 mV/°C Scale Factor

supply.

The

LM50/LM50-Q1's

output

voltage

is

•

±2°C Accuracy Specified at +25°C

linearly

proportional

to

Celsius

(Centigrade)

temperature (+10 mV/°C) and has a DC offset of

•

Specified for Full

−40° to +125°C range

+500

mV.

The

offset

allows

reading

negative

•

Suitable for Remote Applications

temperatures without the need for a negative supply.

•

Low Cost Due to Wafer-level Trimming

The ideal output voltage of the LM50/LM50-Q1

ranges from +100 mV to +1.75V for a

−40°C to

•

Operates from 4.5V to 10V

+125°C temperature range. The LM50/LM50-Q1 does

•

Less than 130

μA Current Drain

not require any external calibration or trimming to

•

Low Self-heating, Less than 0.2°C in Still Air

provide accuracies of ±3°C at room temperature and

±4°C over the full

−40°C to +125°C temperature

•

Nonlinearity Less than 0.8°C Over Temp

range. Trimming and calibration of the LM50/LM50-

•

LM50Q is AEC-Q100 Grade 1 qualified and is

Q1 at the wafer level assure low cost and high

manufactured on an Automotive Grade flow.

accuracy. The LM50/LM50-Q1's linear output, +500

•

UL Recognized Component

mV offset, and factory calibration simplify circuitry

required in a single supply environment where

reading negative temperatures is required. Because

APPLICATIONS

the LM50/LM50-Q1's quiescent current is less than

•

Automotive

130

μA, self-heating is limited to a very low 0.2°C in

•

Computers

still air.

•

Disk Drives

•

Battery Management

•

Automotive

•

FAX Machines

•

Printers

•

Portable Medical Instruments

Figure 1. SOT-23 Pin Out

•

HVAC

Top View

•

Power Supply Modules

See Package Number DBZ0003A

Figure 2. Full-Range Centigrade Temperature

Sensor Application (

−40°C to +125°C)

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2

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PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard

warranty. Production processing does not necessarily include testing of all parameters.