+VS

A0

A1

A2

SCL

SDA

O.S.

GND

8

7

6

5

3

1

2

4

LM75

Address

(Set as desired)

To Processor

Interrupt Line

Interface

100 nF (typ) unless mounted

close to processor

O.S. set to active low

IRUZLUH25¶GPXOWLSOH

interrupt line

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LM75A

SNOS808P – JANUARY 2000 – REVISED DECEMBER 2014

LM75A Digital Temperature Sensor and Thermal Watchdog With Two-Wire Interface

1 Features

3 Description

The

LM75A

is

an

industry-standard

digital

1

•

No External Components Required

temperature sensor with an integrated sigma-delta

•

Shutdown Mode to Minimize Power Consumption

analog-to-digital converter (ADC) and I2C interface.

•

Up to Eight LM75As can be Connected to a Single

The

LM75A

provides

9-bit

digital

temperature

Bus

readings with an accuracy of ±2°C from –25°C to

100°C and ±3°C over –55°C to 125°C.

•

Power up Defaults Permit Stand-Alone Operation

as Thermostat

The LM75A operates with a single supply from 2.7 V

to 5.5 V. Communication is accomplished over a

•

Key Specifications:

2-wire interface which operates up to 400 kHz. The

–

Supply Voltage

LM75A has three address pins, allowing up to eight

–

LM75A: 2.7 V to 5.5 V

LM75A devices to operate on the same 2-wire bus.

The LM75A has a dedicated overtemperature output

–

Supply Current

(O.S.) with programmable limit and hysteresis. This

–

Operating: 280

μA (Typical)

output has programmable fault tolerance, which lets

–

Shutdown: 4

μA (Typical)

the user to define the number of consecutive error

–

Temperature Accuracy

conditions that must occur before O.S. is activated.

The wide temperature and supply range and I2C

–

25°C to 100°C: ±2°C (Max)

interface make the LM75A ideal for a number of

–

55°C to 125°C: ±3°C (Max)

applications including base stations, electronic test

equipment, office electronics, personal computers,

2 Applications

and any other system in which thermal management

is critical to performance. The LM75A is available in

•

General System Thermal Management

an SOIC-8 package and an VSSOP-8 package.

•

Communications Infrastructure

•

Electronic Test Equipment

Device Information(1)

•

Environmental Monitoring

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SOIC (8)

4.90 mm × 3.91 mm

LM75A

VSSOP (8)

3.00 mm × 3.00 mm

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

the end of the datasheet.

Typical Application

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.