ADT7483A(2012) データシートの表示（PDF） - ON Semiconductor

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ADT7483A
(Rev.:2012)

Dual Channel Temperature Sensor and Over Temperature Alarm

ON Semiconductor 

ADT7483A

Dual Channel Temperature

Sensor and Over

Temperature Alarm

The ADT7483A is a three-channel digital thermometer and

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

management systems. It can measure the temperature in two remote

locations, for example, the remote thermal diode in a CPU or GPU, or

a discrete diode connected transistor. It can also measure its own

ambient temperature. The temperature of the remote thermal diode

and ambient temperature can be accurately measured to 1C. The

temperature measurement range defaults to 0C to 127C, compatible

with ADM1032, but can be switched to a wider measurement range,

from −64C to +191C.

The ADT7483A communicates over a 2-wire serial interface

compatible with system management bus (SMBus) standards. The

SMBus address is set by the ADD0 and ADD1 pins. As many as nine

different SMBus addresses are possible.

An ALERT output signals when the on-chip or remote temperature

is outside the programmed limits. The THERM output is a comparator

output that allows, for example, on/off control of a cooling fan. The

ALERT output can be reconfigured as a second THERM output, if

required.

Features

 1 Local and 2 Remote Temperature Sensors

 0.25C Resolution/1C Accuracy on Remote Channels

 1C Resolution/1C Accuracy on Local Channel

 Extended, Switchable Temperature Measurement Range

0C to 127C (Default) or –64C to +191C

 2-wire SMBus Serial Interface with SMBus Alert Support

 Programmable Over/Under Temperature Limits

 Offset Registers for System Calibration

 Up to 2 Overtemperature Fail-safe THERM Outputs

 Small 16-lead QSOP Package

 240 mA Operating Current, 5 mA Standby Current

 This Device is Pb-Free, Halogen Free and is RoHS Compliant

Applications

 Desktop and Notebook Computers

 Industrial Controllers

 Smart Batteries

 Automotive

 Embedded Systems

 Burn-in Applications

 Instrumentation

http://onsemi.com

QSOP−16

CASE 492

PIN ASSIGNMENT

ADD1 1

VDD 2

D1+ 3

D1− 4

THERM 5

GND 6

NC 7

NC 8

16 ADD0

15 SCLK

ADT7483A

(Top View)

14 SDATA

13

ALERT/

THERM2

12 D2+

11 D2−

10 NC

9 NC

NC = No Connect

MARKING DIAGRAM

ADT7483

AARQZ

#YYWW

ADT7483AARQZ = Specific Device Code

#

= Pb-Free Package

YYWW

= Date Code

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 19 of this data sheet.

 Semiconductor Components Industries, LLC, 2012

1

July, 2012 − Rev. 2

Publication Order Number:

ADT7483A/D

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