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參數資料
| 型號： | ADM1021 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Cost Microprocessor System Temperature Monitor |
| 中文描述： | 低成本的微處理器系統溫度監控 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 139K |
| 代理商： | ADM1021 |
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADM1021
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1998
Low Cost Microprocessor
System Temperature Monitor
FUNCTIONAL BLOCK DIAGRAM
ONSENSOR
ANALOG MUX
8-BIT A-TO-D
LVALUE REGISTER
REVALUE REGISTER
BUSY
RUN/STANDBY
LLOCAL TEMPERATURE
STATUS REGISTER
REMOTE TEMPERATURE
REMOTE TEMPERATURE
ADDREGISTER
REGISTER
CONREGISTER
LOW LIMIT REGISTER
HIGH LIMIT REGISTER
RLOW LIMIT REGISTER
HLOCAL TEMPERATURE
HIGH LIMIT REGISTER
CONFIGURATION
REGISTER
IMASKING
EXTERNAL DIODE OPEN-CIRCUIT
SMBUS INTERFACE
ADM1021
TEST
V
DD
NC
GND
NC
NC
TEST
D+
D–
ALERT
STBY
SDATA
SCLK
ADD0
ADD1
GND
FEATURES
Improved Replacement for MAX1617
On-Chip and Remote Temperature Sensing
No Calibration Necessary
1
8
C Accuracy for On-Chip Sensor
3
8
C Accuracy for Remote Sensor
Programmable Over/Under Temperature Limits
Programmable Conversion Rate
2-Wire SMBus Serial Interface
Supports System Management Bus (SMBus) Alert
70
m
A Max Operating Current
3
m
A Standby Current
3 V to 5.5 V Supply
Small 16-Lead QSOP Package
APPLICATIONS
Desktop Computers
Notebook Computers
Smart Batteries
Industrial Controllers
Telecomms Equipment
Instrumentation
PRODUCT DESCRIPTION
The ADM1021 is a two-channel digital thermometer and under/
over temperature alarm, intended for use in personal computers
and other systems requiring thermal monitoring and manage-
ment. The device can measure the temperature of a micropro-
cessor using a diode-connected PNP transistor, which may be
provided on-chip in the case of the Pentium
II or similar pro-
cessors, 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 chan-
nel measures the output of an on-chip temperature sensor, to
monitor the temperature of the device and its environment.
The ADM1021 communicates over a two-wire serial interface
compatible with SMBus
standards. Under and over temperature
limits can be programmed into the devices 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 inter-
rupt, or as an SMBus alert.
SMBus is a trademark and Pentium is a registered trademark of Intel Corporation.
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| ADM1021AARQ | 功能描述:IC SENSOR TEMP DUAL3/5.5V 16QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:1 系列:- 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
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