ADM1023(2012) Просмотр технического описания (PDF) - ON Semiconductor
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ADM1023
(Rev.:2012)
(Rev.:2012)
ON Semiconductor
ADM1023 Datasheet PDF : 16 Pages
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ADM1023
ACPI‐Compliant, High
Accuracy Microprocessor
System Temperature Monitor
The ADM1023 is a 2-channel digital thermometer and
under/overtemperature alarm for use in personal computers and other
systems requiring thermal monitoring and management. Optimized
for the Pentium III, the higher accuracy allows systems designers to
safely reduce temperature guard banding and increase system
performance. The device can measure the temperature of a
microprocessor using a diode-connected PNP transistor, which may be
provided on-chip with the Pentium III or similar processors; or it can
be a low-cost, discrete NPN/PNP device such as the 2N3904/2N3906.
A novel measurement technique cancels out the absolute value of the
transistor’s base emitter voltage so that no calibration is required. The
second measurement channel measures the output of an on-chip
temperature sensor to monitor the temperature of the device and its
environment.
The ADM1023 communicates over a 2-wire serial interface
compatible with SMBus standards. Under/overtemperature limits can
be programmed into the device over the serial bus, and an ALERT
output signals when the on-chip or remote temperature is out of range.
This output can be used as an interrupt or as an SMBus ALERT.
Features
Next Generation Upgrade of ADM1021
On-Chip and Remote Temperature Sensing
Offset Registers for System Calibration
1C Accuracy and Resolution on Local Channel
0.125C Resolution/1C Accuracy on Remote Channel
Programmable Over/Undertemperature Limits
Programmable Conversion Rate
Supports System Management Bus (SMBus) ALERT
2-Wire SMBus Serial Interface
200 mA Max Operating Current (0.25 Conversions/Second)
1 mA Standby Current
3.0 V to 5.5 V Supply
Small 16-Lead QSOP Package
This is a Pb-Free Package*
Applications
Desktop Computers
Notebook Computers
Smart Batteries
Industrial Controllers
Telecomm Equipment
Instrumentation
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2012
1
April, 2012 − Rev. 10
http://onsemi.com
QSOP 16
CASE 492
PIN ASSIGNMENT
NC 1
VDD 2
D+ 3
D− 4
NC 5
ADD1 6
GND 7
GND 8
16 NC
15 STBY
14 SCLK
13 NC
12 SDATA
11 ALERT
10 ADD0
9 NC
ADM1023
(Top View)
MARKING DIAGRAM
1023A
RQZ
YYWWG
1023ARQZ
YY
WW
G
= Specific Device Code
= Year
= Work Week
= Pb-Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
Publication Order Number:
ADM1023/D
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