ADT7461

更新时间： 2024-09-16 22:05:23

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	805K
描述
【1∑C Temperature Monitor with Series Resistance Cancellation

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ADT7461 数据手册

± ±1°C TemTꢀratꢀTCꢁMonaMꢀCꢂnaꢃ

STꢀnTsCRTsnsarocTC°rocTllranMo

AD 746±*

PRODUCT DESCRIPTION

FEATURES

On-chip and remote temperature sensor

0.25°C resolution/1°C accuracy on remote channel

1°C resolution/3°C accuracy on local channel

Automatically cancels up to 3 kΩ (typ) of resistance in series

with remote diode to allow noise filtering

Extended, switchable temperature measurement range 0°C

to +127°C (default) or –55°C to +150°C

Pin and register compatible with ADM1032

2-wire SMBus serial interface with SMBus alert support

Programmable over/under temperature limits

Offset registers for system calibration

The ADT7461 is a dual-channel digital thermometer and

under/over temperature alarm, intended for use in PCs and

thermal management systems. It is pin and register compatible

with the ADM1032. The ADT7461 has three additional features:

series resistance cancellation, where up to 3 kΩ (typical) of

resistance in series with the temperature monitoring diode may

be automatically cancelled from the temperature result, allowing

ALERT

noise filtering; configurable

output; and an extended,

switchable temperature measurement range.

The ADT7461 can measure the temperature of a remote ther-

mal diode accurate to 1ꢀC, and the ambient temperature accu-

rate to 3ꢀC. The temperature measurement range defaults to

0ꢀC to +127ꢀC, compatible with ADM1032, but can be switched

to a wider measurement range, from −55ꢀC to +150ꢀC. The

ADT7461 communicates over a 2-wire serial interface compati-

ble with system management bus (SMBus) standards. An

THERM

Up to 2 overtemperature fail-safe

outputs

Small 8-lead SOIC or MSOP package

170 µA operating current, 5.5 µA standby current

APPLICATIONS

Desktop and notebook computers

Industrial controllers

Smart batteries

ALERT

output signals when the on-chip or remote temperature

THERM

is out of range. The

output is a comparator output that

ALERT

Automotive

allows on/off control of a cooling fan. The

output can

Enbedded systems

Burn-in applications

Instrumentation

THERM

be reconfigured as a second

output if required.

*Protected by U.S. Patents 5,195,827; 5,867,012; 5,982,221;

6,097,239; 6,133,753; 6,169,442; other patents pending.

CONVERSION RATE

ADDRESS POINTER

ON-CHIP

TEMPERATURE

SENSOR

LOCAL TEMPERATURE

LOW LIMIT REGISTER

LOCAL TEMPERATURE

VALUE REGISTER

LOCAL TEMPERATURE

HIGH LIMIT REGISTER

ANALOG

MUX

ADC

REMOTE TEMPERATURE

LOW LIMIT REGISTER

BUSY

RUN/STANDBY

REMOTE TEMPERATURE

HIGH LIMIT REGISTER

D+

D–

REMOTE TEMPERATURE

VALUE REGISTER

SRC

BLOCK

LOCAL THERM LIMIT

REMOTE OFFSET

EXTERNAL THERM LIMIT

CONFIGURATION

EXTERNAL DIODE OPEN-CIRCUIT

INTERRUPT

STATUS REGISTER

MASKING

ADT7461

SMBus INTERFACE

GND

SDATA

SCLK

THERM

ALERT/

THERM2

Figure 1. Functional Block Diagram

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

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与ADT7461相关器件

型号	品牌	获取价格	描述	数据表
ADT7461A	ADI	获取价格	【1∑C Temperature Monitor with Series Resistan
ADT7461A	ONSEMI	获取价格	±1℃ Temperature Monitor with Series Resistanc
ADT7461AARMZ	ONSEMI	获取价格	Â±1â Temperature Monitor with Series Resist
ADT7461AARMZ	ADI	获取价格	【1∑C Temperature Monitor with Series Resistan
ADT7461AARMZ-002	ONSEMI	获取价格	±1℃ Temperature Monitor with Series Resistanc
ADT7461AARMZ-2	ADI	获取价格	【1∑C Temperature Monitor with Series Resistan
ADT7461AARMZ-2REEL	ADI	获取价格	【1∑C Temperature Monitor with Series Resistan
ADT7461AARMZ-2RL	ONSEMI	获取价格	Â±1â Temperature Monitor with Series Resist
ADT7461AARMZ2RL7	ONSEMI	获取价格	±1℃ Temperature Monitor with Series Resistanc
ADT7461AARMZ-2RL7	ADI	获取价格	【1∑C Temperature Monitor with Series Resistan

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