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ADT7485A Datasheet

SST Digital Temperature Sensor and Voltage Monitor

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FEATURES
1 on-chip temperature sensor
1 remote temperature sensor
Monitors up to 5 voltages
Simple Serial Transport™ (SST™) interface
APPLICATIONS
Personal computers
Portable personal devices
Industrial sensor nets
SST Digital Temperature Sensor
and Voltage Monitor
ADT7485A
GENERAL DESCRIPTION
The ADT7485A is a digital temperature sensor and voltage
monitor for use in PC applications with a Simple Serial Transport
(SST) interface. It can monitor its own temperature as well as
the temperature of a remote sensor diode. It can also monitor
four external voltage channels and its own supply voltage. The
ADT7485A is controlled by a single SST bidirectional data line.
This device is a fixed-address SST client where the target address
is chosen by the state of the address pin, ADD.
FUNCTIONAL BLOCK DIAGRAM
VCC
12V
5V
VCCP
2.5V
D1+
D1–
ON-CHIP
TEMPERATURE
SENSOR
ADT7485A
INPUT
ATTENUATORS
AND
ANALOG
MULTIPLEXER
TEMPERATURE
VALUE REGISTERS
A/D
CONVERTER
VOLTAGE
VALUE REGISTERS
GND
Figure 1.
OFFSET REGISTERS
SST INTERFACE
SST
ADDRESS
SELECTION
ADD
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

ADT7485A Datasheet

SST Digital Temperature Sensor and Voltage Monitor

No Preview Available !

www.DataSheet4U.com
ADT7485A
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configuration and Functional Descriptions.......................... 6
Typical Performance Characteristics ............................................. 7
Product Description......................................................................... 9
REVISION HISTORY
7/06—Revision 0: Initial Version
SST Interface ..................................................................................9
Voltage Measurement .................................................................... 12
Analog-to-Digital Converter .................................................... 12
Temperature Measurement ........................................................... 13
Temperature Measurement Method ........................................ 13
Reading Temperature Measurements...................................... 13
SST Temperature Sensor Data Format .................................... 13
Using Discrete Transistors ........................................................ 14
Layout Considerations............................................................... 14
Temperature Offset .................................................................... 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 15
Rev. 0 | Page 2 of 16


Part Number ADT7485A
Description SST Digital Temperature Sensor and Voltage Monitor
Maker Analog Devices
Total Page 16 Pages
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