DataSheetWiki


ADM1021A fiches techniques PDF

Analog Devices - System Temperature Monitor Microcomputer

Numéro de référence ADM1021A
Description System Temperature Monitor Microcomputer
Fabricant Analog Devices 
Logo Analog Devices 





1 Page

No Preview Available !





ADM1021A fiche technique
Low Cost Microprocessor,
System Temperature Monitor Microcomputer
ADM1021A
FEATURES
PRODUCT DESCRIPTION
Alternative to the ADM1021
On-chip and remote temperature sensing
No calibration necessary
1°C accuracy for on-chip sensor
3°C accuracy for remote sensor
Programmable overtemperature/undertemperature
limits
Programmable conversion rate
2-wire SMBus serial interface
Supports system management bus (SMBus) alert
200 μA max operating current
1 μA standby current
3 V to 5.5 V supply
Small 16-lead QSOP package
APPLICATIONS
Desktop computers
Notebook computers
Smart batteries
Industrial controllers
Telecom equipment
Instrumentation
The ADM1021A1 is a two-channel digital thermometer and
undertemperature/overtemperature alarm, intended for use
in personal computers and other systems requiring thermal
monitoring and management. The device can measure the
temperature of a microprocessor using a diode-connected
PNP transistor, which can be provided on-chip with the
Pentium® III or similar processors, or 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 ADM1021A communicates over a two-wire serial interface
compatible with SMBus standards. Undertemperature and
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.
FUNCTIONAL BLOCK DIAGRAM
ON-CHIP
TEMPERATURE
SENSOR
LOCAL TEMPERATURE
VALUE REGISTER
D+ 3
D– 4
ANALOG MUX
A-TO-D
CONVERTER
BUSY
RUN/STANDBY
REMOTE TEMPERATURE
VALUE REGISTER
EXTERNAL DIODE OPEN-CIRCUIT
LOCAL TEMPERATURE
LOW LIMIT COMPARATOR
LOCAL TEMPERATURE
HIGH LIMIT COMPARATOR
REMOTE TEMPERATURE
LOW LIMIT COMPARATOR
REMOTE TEMPERATURE
HIGH LIMIT COMPARATOR
STATUS REGISTER
ADDRESS POINTER
REGISTER
ONE-SHOT
REGISTER
CONVERSION RATE
REGISTER
LOCAL TEMPERATURE
LOW LIMIT REGISTER
LOCAL TEMPERATURE
HIGH LIMIT REGISTER
REMOTE TEMPERATURE
LOW LIMIT REGISTER
REMOTE TEMPERATURE
HIGH LIMIT REGISTER
CONFIGURATION
REGISTER
INTERRUPT
MASKING
15 STBY
11 ALERT
ADM1021A
SMBUS INTERFACE
125789
NC VDD NC GND GND NC
13
NC
16
NC
12
SDATA
14
SCLK
10
ADD0
6
ADD1
Figure 1.
1Protected 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.
NC = NO CONNECT
Rev. F
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
www.analog.com
Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved.

PagesPages 20
Télécharger [ ADM1021A ]


Fiche technique recommandé

No Description détaillée Fabricant
ADM1021 Low Cost Microprocessor System Temperature Monitor Analog Devices
Analog Devices
ADM1021A Low Cost Microprocessor System Temperature Monitor Microcomputer ON Semiconductor
ON Semiconductor
ADM1021A System Temperature Monitor Microcomputer Analog Devices
Analog Devices

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche