LM82
www.ti.com SNIS113D – JANUARY 2000 – REVISED MARCH 2013 LM82 Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface
Check for Samples: LM82 FEATURES DESCRIPTION The LM82 is a digital temperature sensor with a 2
wire serial interface that senses the voltage and thus
the temperature of a remote diode using a DeltaSigma analog-to-digital converter with a digital overtemperature detector. The LM82 accurately senses
its own temperature as well as the temperature of
external devices, such as Pentium II Processors or
diode connected 2N3904s. The temperature of any
ASIC can be detected using the LM82 as long as a
dedicated diode (semiconductor junction) is available
on the die. Using the SMBus interface a host can
access the LM82's registers at any time. Activation of
a T_CRIT_A output occurs when any temperature is
greater than a programmable comparator limit,
T_CRIT. Activation of an INT output occurs when any
temperature is greater than its corresponding
programmable comparator HIGH limit. 1 2 Accurately Senses Die Temperature of Remote
ICs, or Diode Junctions
On-board Local Temperature Sensing
SMBus and I2C Compatible Interface, Supports
SMBus 1.1 TIMEOUT
Two Interrupt Outputs: INT and T_CRIT_A
Register Readback Capability …
