Datasheet
LM75B, LM75C
www.ti.com
SNIS153B –JULY 2009–REVISED MARCH 2013
LM75B
LM75C Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
Check for Samples: LM75B, LM75C
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FEATURES
DESCRIPTION
The LM75B and LM75C are industy-standard digital
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• No External Components Required
temperature sensors with an integrated Sigma-Delta
• Shutdown Mode to Minimize Power
analog-to-digital converter and I
2
C interface. The
Consumption
LM75 provides 9-bit digital temperature readings with
• Up to Eight LM75s Can be Connected to a
an accuracy of ±2°C from -25°C to 100°C and ±3°C
over -55°C to 125°C.
Single Bus
• Power Up Defaults Permit Stand-alone
Communication is accomplished over a 2-wire
Operation as Thermostat
interface which operates up to 400kHz. The LM75
has three address pins, allowing up to eight LM75
• UL Recognized Component (LM75B and
devices to operate on the same 2-wire bus. The
LM75C)
LM75 has a dedicated over-temperature output (O.S.)
with programmable limit and hystersis. This output
APPLICATIONS
has programmable fault tolerance, which allows the
• General System Thermal Management
user to define the number of consecutive error
conditions that must occur before O.S. is activated.
• Communications Infrastructure
The wide temperature and supply range and I
2
C
• Electronic Test Equipment
interface make the LM75 ideal for a number of
• Environmental Monitoring
applications including base stations, electronic test
equipment, office electronics, personal computers,
KEY SPECIFICATIONS
and any other system where thermal management is
• Supply Voltage critical to performance. The LM75B and LM75C are
available in an SOIC package or VSSOP package.
– LM75B, LM75C: 3.0V to 5.5V
• Supply Current
– Operating: 280 μA (typ)
– Shutdown: 4 μA (typ)
• Temperature Accuracy
– −25°C to 100°C: ±2°C (max)
– −55°C to 125°C: ±3°C (max)
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PRODUCTION DATA information is current as of publication date.
Copyright © 2009–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.