GENERAL DESCRIPTION

The SGM459 is an industry standard digital temperature

sensor which integrates sigma-delta analog-to-digital

converter (ADC) and I2

C interface. This device is

accurate to ±1.2℃ in the range of -55℃ to +125℃.

The SGM459 offers 12-bit digital temperature readings.

The power supply voltage of the device is from 2.7V to

5.5V. I

2

C interface is used to communicate with

SGM459 devices and it operates up to 400kHz.There

are three address pins of the devices to support eight

SGM459 at most on the same I2

C bus. There is an

appropriative over-temperature output with

programmable limit and hysteresis on SGM459. The

programmable fault tolerance of the output can define

the number of consecutive error conditions that must

occur before OS is activated. The wide temperature,

wide power supply range and I2

C interface make the

SGM459 ideal for plenty of applications in which

thermal management is critical for performance, such as

wireless base stations, notebook computers, personal

computers, etc.

The SGM459 is available in a Green TDFN-2×2-8AL

package and operates over an ambient temperature

range of -55℃ to +125℃.

FEATURES

● Power Supply Voltage Range: 2.7V to 5.5V

● Temperature Accuracy:

? -55℃ to +125℃: ±1.2℃ (MAX)

● Low Quiescent Current: 49μA (TYP)

● Shutdown Mode Current: 0.4μA (TYP)

● Without External Components

● Minimize Power Consumption through

Shutdown Mode

● Support Eight SGM459 Devices in One Serial

Bus

● Support 1.8V I2

C Bus Voltage at 3.3V Power

Supply

● Power-Up Defaults Can be Operated StandAlone as Thermostat

● Available in a Green TDFN-2×2-8AL Package

APPLICATIONS

Thermal Management in Computing System

Telecom Infrastructure Equipment

Environmental Monitoring