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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.

LM61

SNIS121J – JUNE 1999 – REVISED NOVEMBER 2016

LM61 2.7-V, SOT-23 or TO-92 Temperature Sensor

1

1 Features

1

•

Calibrated Linear Scale Factor of 10 mV/°C

•

Rated for Full Temperature Range (–30° to

100°C)

•

Suitable for Remote Applications

•

UL Recognized Component

•

±2°C or ±3°C Accuracy at 25°C (Maximum)

•

±3°C Accuracy for –25°C to 85°C (Maximum)

•

±4°C Accuracy for –30°C to 100°C (Maximum)

•

10 mV/°C Temperature Slope (Maximum)

•

2.7-V to 10-V Power Supply Voltage Range

•

125-µA Current Drain at 25°C (Maximum)

•

±0.8°C Nonlinearity (Maximum)

•

800-Ω Output Impedance (Maximum)

2 Applications

•

Cellular Phones

•

Computers

•

Power Supply Modules

•

Battery Management

•

FAX Machines

•

Printers

•

HVAC

•

Disk Drives

•

Appliances

3 Description

The LM61 device is a precision, integrated-circuit

temperature sensor that can sense a –30°C to 100°C

temperature range while operating from a single

2.7

‑V supply. The output voltage of the LM61 is

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

has a DC offset of 600 mV. The offset allows reading

negative

temperatures

without

the

need

for

a

negative supply. The nominal output voltage of the

LM61 ranges from 300 mV to 1600 mV for a –30°C to

100°C temperature range. The LM61 is calibrated to

provide accuracies of ±2°C at room temperature and

±3°C over the full –25°C to 85°C temperature range.

The linear output of the LM61, 600-mV offset, and

factory calibration simplify external circuitry required

in

a

single

supply

environment

where

reading

negative temperatures is required. Because the

quiescent current is less than 125 µA, self-heating is

limited to a very low 0.2°C in still air. Shutdown

capability for the LM61 is intrinsic because its

inherent low power consumption allows it to be

powered directly from the output of many logic gates.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM61

SOT-23 (3)

1.30 mm × 2.92 mm

TO-92 (3)

4.30 mm × 4.30 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application

VO = (10 mV/°C × T°C) + 600 mV

Key Specifications

VALUE

Accuracy at 25°C

±2°C or ±3°C

Accuracy for –25°C to 85°C

±3°C

Accuracy for –30°C to 100°C

±4°C

Temperature slope

10 mV/°C

Power supply voltage

2.7 V to 10 V

Current drain at 25°C

125 µA

Nonlinearity

±0.8°C

Output impedance

800 Ω