Datasheet > G786

G786

更新时间： 2024-10-30 01:25:15

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描述
Â±1C Remote and Local Temperature Sensor with SMBus Serial Interface

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G786 数据手册

Global Mixed-mode Technology Inc.

G786

±1°C Remote and Local Temperature Sensor with

SMBus Serial Interface

Features

General Description

The G786 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 tran-

sistor typically a low-cost, easily mounted 2N3904 NPN

type that replace conventional thermistors or thermo-

couples. Remote accuracy is ±1°C with no calibration

needed. It also has a build-in noise filtering function in

remote sensor measuring the diode temperature. The

remote channel can also measure the die temperature

of other ICs, such as microprocessors, that contain an

on-chip, diode-connected transistor.

Two Channels: Measures Both Remote and

Local Temperatures

No Calibration Required

Built-in Noise-Buster for Remote Sensor

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 SOP and MSOP Package

Remote Temperature Measurment up to 160°C

by using offset shifting method (see “Measure

Remote Temperature Higher Than 127°C” sec-

tion)

Applications

Desktop and Notebook

Computers

Smart Battery Packs

LAN Servers

Central Office

The G786 and G786-1 have the same functions but

different SMBus slave addresses. This allows for one

of each to be on the bus at the same time.

Telecom Equipment

Test and Measurement

Multi-Chip Modules

Industrial Controllers

The G786 is available in a small, 8-pin SOP and

MSOP surface-mount package.

Ordering Information

ORDER

NUMBER

TEMP.

RANGE

PACKAGE

(Green)

MARKING

G786P11U

G786P81U

G786-1P81U

G786

-55°C to +125°C

SOP-8

MSOP-8

G786-1

Note:P1:SOP-8

P8:MSOP-8

1: Bonding Code

U: Tape & Reel

Pin Configuration

Typical Application Circuit

3V TO 5.5V

0.1µF

G786/G786-1

VCC

SMBCLK

VCC

DXP

10kΩ EACH

SMBDATA

ALERT

GND

DXP

CLOCK

DATA

SMBCLK

SMBDATA

*DXN

ALERT

DXN

INTERRUPT TO µC

2200pF

2N3904

THERM

GND

SOP-8/MSOP-8

*: DXN : DXN is internally connected to GND.

Ver: 0.3

Apr 29, 2009

TEL: 886-3-5788833

http://www.gmt.com.tw

中文翻译

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