LM99
www.ti.com SNIS129D – JANUARY 2003 – REVISED MARCH 2013 LM99 ±1°C Accurate, High Temperature, Remote Diode Temperature Sensor with TwoWire Interface
Check for Samples: LM99 FEATURES DESCRIPTION The LM99 is an 11-bit remote diode temperature
sensor with a 2-wire System Management Bus
(SMBus) serial interface. The LM99 accurately
measures: (1) its own temperature and (2) the
temperature of a remote diode-connected transistor
such as the 2N3904 or a thermal diode commonly
found on Graphics Processor Units (GPU), Computer
Processor Units (CPU or other ASICs. The LM99
remote diode temperature sensor shifts the
temperature from the remote sensor down 16В°C and
operates on that shifted temperature: 1 2 Accurately Senses the Temperature of Remote
Diodes
Offset Register Allows Use of a Variety of
Thermal Diodes
On-board Local Temperature Sensing
10 Bit Plus Sign Remote Diode Temperature
Data Format, 0.125 В°C Resolution
T_CRIT_A Output Useful for System Shutdown
ALERT Output Supports SMBus 2.0 Protocol
SMBus 2.0 Compatible Interface, Supports
TIMEOUT …
