LM75AIM Digital Temperature Sensor Thermal Watchdog With Two Wire
Interface
Board Mount Temperature Sensors Digital Temp Sensor & Thermal
Watchdog
Features • 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)
Applications
• General System Thermal Management
• Communications Infrastructure
• Electronic Test Equipment
• Environmental Monitoring
Description
The LM75A is an industry-standard digital temperature sensor with
an integrated sigma-delta analog-to-digital converter (ADC) and I
2C 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 I 2 – 25°C to 100°C: ±2°C
(Max) C 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.
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