1 Features
1• No External Components Required
• Shutdown Mode to Minimize Power Consumption
• Up to Eight LM75As can be Connected to a Single
Bus
• Power up Defaults Permit Stand-Alone Operation
as Thermostat
• Key Specifications:
– Supply Voltage
– LM75A: 2.7 V to 5.5 V
– Supply Current
– Operating: 280 μA (Typical)
– Shutdown: 4 μA (Typical)
– Temperature Accuracy
– 25°C to 100°C: ±2°C (Max)
– 55°C to 125°C: ±3°C (Max)

2 Applications
• General System Thermal Management
• Communications Infrastructure
• Electronic Test Equipment
• Environmental Monitoring

3 Description
The LM75A is an industry-standard digital
temperature sensor with an integrated sigma-delta analog-to-digital converter (ADC) and I2C interface.
The LM75A provides 9-bit digital temperature
readings with an accuracy of ±2°C from –25°C to
100°C and ±3°C over –55°C to 125°C.
The LM75A operates with a single supply from 2.7 V
to 5.5 V. Communication is accomplished over a
2-wire interface which operates up to 400 kHz. The
LM75A has three address pins, allowing up to eight
LM75A devices to operate on the same 2-wire bus.
The LM75A has a dedicated overtemperature output
(O.S.) with programmable limit and hysteresis. This
output has programmable fault tolerance, which lets
the user to define the number of consecutive error
conditions that must occur before O.S. is activated.
The wide temperature and supply range and I2C
interface make the LM75A ideal for a number of applications including base stations, electronic test
equipment, office electronics, personal computers,
and any other system in which thermal management
is critical to performance. The LM75A is available in
an SOIC-8 package and an VSSOP-8 package.