SMSC EMCT03

DATASHEET

Revision 2.3 (04-19-05)

Datasheet

EMCT03

1°C Triple SMBus

Temperature Sensor

General Description

The EMCT03 is a System Management Bus (SMBus)

temperature sensor that is capable of monitoring three

temperature zones. The three temperature zones

consist of two external and one internal temperature

diode. The internal 11 bit sigma-delta ADC architecture

with digital filtering attributes to superb linearity and

immunity to interference and noise. An extended

temperature format may be selected for compatibility

with a broad range of CPUs. Selectable conversion

rates and standby mode support low-power operation.

Features

— Programmable conversion rate

— < 1mA at 16 Conversions per Second

— < 3uA in Standby Mode

— Range -64

°C to +191°C

— 0.125

°C resolution

—

±1°C Accuracy 40°C to 80°C

— Diode Fault Reporting

— Range 0

°C to +85°C

— 0.125

°C resolution

—

±3°C Accuracy 0°C to 85°C

Package also available.

Simplified Block Diagram

EMCT03

Local Temp

Diode

Switching

Current

SMCLK

Local Temp

Register

Configuration

Register

Status Register

Remote Temp

Register 1

Remote Temp

Register 2

SMDATA

11-bit

Sigma Delta

ADC

DP1

DN1

DP2

DN2

Digital Mux

and

Byte Interlock