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参数资料
| 型号： | ADM1021A |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Low-Cost Microprocessor System Temperature Monitor |
| 中文描述： | 低成本的微处理器系统温度监控 |
| 文件页数： | 1/12页 |
| 文件大小： | 163K |
| 代理商： | ADM1021A |
REV. A
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
ADM1021A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
Analog Devices, Inc., 2001
FUNCTIONAL BLOCK DIAGRAM
ONSENSOR
ANALOG MUX
A-TO-D
CONVERTER
LVALUE REGISTER
REMOTE TEMPERATURE
VALUE REGISTER
BUSY
RUN/STANDBY
LLOCAL TEMPERATURE
STATUS REGISTER
REMOTE TEMPERATURE
REMOTE TEMPERATURE
ADDREGISTER
REGISTER
CONREGISTER
LOW LIMIT REGISTER
HIGH LIMIT REGISTER
RLOW LIMIT REGISTER
LOCAL TEMPERATURE
HIGH LIMIT COMPARATOR
HIGH LIMIT REGISTER
COREGISTER
INTERRUPT
MASKING
EXTERNAL DIODE OPEN-CIRCUIT
SMBUS INTERFACE
ADM1021A
NC
V
DD
NC
GND
NC
NC
NC
D+
D–
ALERT
STBY
SDATA
SCLK
ADD0
ADD1
GND
NC = NO CONNECT
Low-Cost Microprocessor
System Temperature Monitor
*
FEATURES
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 Over/Under Temperature Limits
Programmable Conversion Rate
2-Wire SMBus Serial Interface
Supports System Management Bus (SMBus) Alert
200 A Max Operating Current
1 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 ADM1021A is a two-channel digital thermometer and under/
over temperature 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 may be provided
on-chip in the case of 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 chan-
nel 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. 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.
*
Patents Pending.
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 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADM1021AARQ-REEL | 功能描述:IC SENSOR TEMP DUAL3/5.5V 16QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADM1021AARQ-REEL7 | 功能描述:IC SENSOR TEMP DUAL3/5.5V 16QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADM1021AARQZ | 功能描述:板上安装温度传感器 PIN COMP TO ADM1021 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| ADM1021AARQZ-R | 功能描述:板上安装温度传感器 PIN COMP TO ADM1021 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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