SMSC EMCT03

PRODUCT PREVIEW

Revision 2.1 (09-03-04)

Data Brief

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 for a PC or embedded environment.

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 standy mode

support low-power operation.

Applications

Features

— Programmable conversion rate

— < 1mA at 16 Conversions per Second

— < 3uA in Standy 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

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