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ADT7482

Analog Devices
Part Number ADT7482
Manufacturer Analog Devices
Description Dual Channel Temperature Sensor and Overtemperature Alarm
Published Dec 1, 2006
Detailed Description www.DataSheet4U.com Dual Channel Temperature Sensor and Overtemperature Alarm ADT7482 FEATURES 1 local and 2 remote tem...
Datasheet PDF File ADT7482 PDF File

ADT7482
ADT7482

Overview
www.
DataSheet4U.
com Dual Channel Temperature Sensor and Overtemperature Alarm ADT7482 FEATURES 1 local and 2 remote temperature sensors 0.
25°C resolution/1°C accuracy on remote channels 1°C resolution/1°C accuracy on local channel Automatically cancels up to 1.
5 kΩ (typ) of resistance in series with the remote sensors Extended, switchable temperature measurement range 0°C to +127°C (default) or −55°C to +150°C 2-wire SMBus serial interface with SMBus alert support Programmable overtemperature/undertemperature limits Offset registers for system calibration Up to 2 overtemperature fail-safe THERM outputs Small, 10-lead MSOP package 240 μA operating current, 5 μA standby current GENERAL DESCRIPTION The ADT7482 1 is a three-channel digital thermometer and undertemperature/overtemperature alarm for PCs and thermal management systems.
It can measure the temperature in two remote locations, such as in the remote thermal diode in a CPU or GPU, or using a discrete diode connected transistor.
This device also measures its own ambient temperature.
One feature of the ADT7482 is series resistance cancellation where up to 1.
5 kΩ (typical) of resistance in series with each of the temperature monitoring diodes can be automatically cancelled from the temperature result, allowing noise filtering.
The temperature of the remote thermal diodes and ambient temperature can be measured accurate to ±1°C.
The temperature measurement range, which defaults to 0°C to 127°C, can be switched to a wider measurement range of from −55°C to +150°C.
The ADT7482 communicates over a 2-wire serial interface compatible with system management bus (SMBus) standards.
The default address of the ADT7482 is 0x4C.
An ALERT output signals when the on-chip or remote temperature is outside the programmed limits.
The THERM output is a comparator output that allows on/off control of a cooling fan.
The ALERT output can be reconfigured as a second THERM output if required.
1 APPLICATIONS Desktop and notebook compute...


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