參數(shù)資料
型號: ADM1032ARM
廠商: ANALOG DEVICES INC
元件分類: 模擬信號調(diào)理
英文描述: +-1C Remote and Local System Temperature Monitor
中文描述: SPECIALTY ANALOG CIRCUIT, PDSO8
封裝: MO-187AA, MSOP-8
文件頁數(shù): 1/12頁
文件大小: 167K
代理商: ADM1032ARM
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
ADM1032
*
Tel: 781/329-4700
Analog Devices, Inc., 2001
1 C Remote and Local
System Temperature Monitor
FUNCTIONAL BLOCK DIAGRAM
TESENSOR
A-TO-D
CONVERTER
BUSY
RUN/STANDBY
EXTERNAL DIODE OPEN-CIRCUIT
ADDREGISTER
CONVERSION RATE
REGISTER
HIGH-LIMIT REGISTER
COREGISTER
IMASKING
COMLIMIT
REMOTE TEMPERATURE
VALUE REGISTER
LVALUE REGISTER
V
DD
GND
SDATA
SCLK
THERM
ALERT
D+
D–
RLOW-LIMIT REGISTER
HIGH-LIMIT REGISTER
LOCAL TEMPERATURE
LOW-LIMIT REGISTER
AMUX
ADM1032
LOCREGISTER
EXTERNAL THERM LIMIT
REGISTER
D
D
STATUS REGISTER
SMBUS INTERFACE
REMOTE OFFSET
REGISTER
FEATURES
On-Chip and Remote Temperature Sensing
Offset Registers for System Calibration
0.125 C Resolution/1 C Accuracy on Remote Channel
1 C Resolution/3 C Accuracy on Local Channel
Fast (Up to 64 Measurements per Second)
2-Wire SMBus Serial Interface
Supports SMBus Alert
Programmable Over/Under Temperature Limits
Programmable Fault Queue
Over-Temperature Fail-Safe
THERM
Output
Programmable
THERM
Limits
Programmable
THERM
Hysteresis
170 A Operating Current
5.5 A Standby Current
3 V to 5.5 V Supply
Small 8-Lead SO and Micro_SO Package
APPLICATIONS
Desktop Computers
Notebook Computers
Smart Batteries
Industrial Controllers
Telecomms Equipment
Instrumentation
Embedded Systems
Pentium is a registered trademark of Intel Corporation.
*
Patents 5,982,221, 6,097,239, 6,133,753, 6,169,442, 5,867,012.
PRODUCT DESCRIPTION
The ADM1032 is a dual-channel digital thermometer and
under/over temperature alarm, intended for use in personal
computers and thermal management systems. The higher 1
°
C
accuracy offered allows systems designers to safely reduce
temperature guardbanding and increase system performance.
The device can measure the temperature of a microprocessor
using a diode-connected NPN or PNP transistor, which may be
provided on-chip or can be a low-cost discrete device such as
the 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 mea-
sures the output of an on-chip temperature sensor, to monitor
the temperature of the device and its environment.
The ADM1032 communicates over a two-wire serial interface
compatible with System Management Bus (SMBus) standards.
Under and over temperature limits can be programmed into the
device over the serial bus, and an
ALERT
output signals when
the on-chip or remote temperature measurement is out of range.
This output can be used as an interrupt, or as an SMBus alert.
The
THERM
output is a comparator output that allows CPU
clock throttling or on/off control of a cooling fan.
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