Datasheet > G781

G781

更新时间： 2024-10-28 22:00:47

品牌	Logo	应用领域
其他 - ETC		传感器温度传感器
页数	文件大小	规格书
14页	343K
描述
【1∑C Remote and Local Temperature Sensor with SMBus Serial Interface

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中文翻译

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G781 数据手册

Global Mixed-mode Technology Inc.

G781

±1°C Remote and Local Temperature Sensor with

SMBus Serial Interface

Features

General Description

^ꢀTwo Channels: Measures Both Remote and

Local Temperatures

The G781 is a precise digital thermometer that reports

the temperature of both a remote sensor and its own

package. The remote sensor is a diode-connected

transistor typically a low-cost, easily mounted 2N3904

NPN type that replace conventional thermistors or

thermocouples. Remote accuracy is ±1°C with no cali-

bration needed. The remote channel can also meas-

ure the die temperature of other ICs, such as micro-

processors, that contain an on-chip, diode-connected

transistor.

^ꢀNo Calibration Required

^ꢀSMBus 2-Wire Serial Interface

^ꢀProgrammable Under/Overtemperature Alarms

^ꢀSupports SMBus Alert Response

^ꢀAccuracy:

±1°C (+60°C to +100°C, remote)

±3°C (+60°C to + 100°C, local)

^ꢀ320µA (typ) Average Supply Current During

Conversion

The 2-wire serial interface accepts standard System

Management Bus (SMBus) Write Byte, Read Byte,

Send Byte, and Receive Byte commands to program

the alarm thresholds and to read temperature data.

The data format is 11bits plus sign, with each bit cor-

responding to 0.125°C, in two’s-complement format.

Measurements can be done automatically and

autonomously, with the conversion rate programmed

by the user or programmed to operate in a single-shot

mode. The adjustable rate allows the user to control

the supply current drain.

^ꢀ+3V to +5.5V Supply Range

^ꢀSmall 8-Lead SO Package

Applications

Desktop and Notebook

Computers

Central Office

Telecom Equipment

Test and Measurement

Multi-Chip Modules

Smart Battery Packs

LAN Servers

Industrial Controllers

The G781 is available in a small, 8-pin SOP sur-

face-mount package.

Ordering Information

PART*

G781

TEMP. RANGE

-20°C to +120°C

PIN-PACKAGE

8-SOP

Pin Configuration

Typical Operating Circuit

3V TO 5.5V

0.1µF

G781

VCC

SMBCLK

10k EACH

Ω

VCC

SMBDATA

ALERT

GND

DXP

CLOCK

DATA

DXP

DXN

SMBCLK

SMBDATA

ALERT

DXN

INTERRUPT TO µC

2200pF

2N3904

THERM

GND

8 Pin SOP

Ver: 1.0

Oct 02, 2002

TEL: 886-3-5788833

http://www.gmt.com.tw

12 3 4 5 6 7...14

中文翻译

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