Datasheet Texas Instruments LM84BIMQA/NOPB — Ficha de datos

LM84 LM84 Diode Input Digital Temperature Sensor with Two-Wire Interface Literature Number: SNIS108B LM84
Diode Input Digital Temperature Sensor with Two-Wire
Interface
General Description
The LM84 is a remote diode temperature sensor,
Delta-Sigma analog-to-digital converter, and digital
over-temperature detector with an SMBusв„ў interface. The
LM84 senses its own temperature as well as the temperature of a target IC with a diode junction, such as a Pentium В®
II processor or a diode connected 2N3904. A diode junction
(semiconductor junction) is required on the target IC’s die. A
host can query the LM84 at any time to read the temperature
of this diode as well as the temperature state of the LM84
itself. A T_CRIT_A interrupt output becomes active when the
temperature is greater than a programmable comparator
limit, T_CRIT.
The host can program as well as read back the state of the
T_CRIT register. Three state logic inputs allow two pins
(ADD0, ADD1) to select up to 9 SMBus address locations for
the LM84. The sensor powers up with default thresholds of
127ЛљC for T_CRIT. Features
n Directly senses die temperature of remote ICs
n Senses temperature of remote diodes
n SMBus compatible interface, supports SMBus Timeout n Register readback capability …