The LM75 is a digital, serial programmable temperature sensor.
The communication with the LM75 happens over a 2-wire-bus (TWI/I²C), which is compatible with the industrial
standard protocols. This allows you to read the current temperature, to program the given value and hysteresis
as well as the configuration of the device.
The INT / CMPTR output is programmable as simple comparator for a thermostat application or as
temperature-interrupt-event. If the ambient temperature exceeds a user-programmed setpoint, then the
host controller is informed. The hysteresis is also programmable.
The LM75 is raised in a comparator mode with a setpoint of 80° C and 5° C hysteresis.
Default values allow the operation as an independent stand-alone thermostat.
A shut down command is send over a 2-wire-bus to activate the stand-by-mode.
Address inputs allow until 8 LM75 which are using the same 2-wire-bus for the multi-zone-observation.
All registers can be read by the host. The INT/CMPTR-polarity is programmable through the user.
Because of his small physically size, the low installation costs and the easy using the LM75 is the
ideal choice for the implementation of simple and sophisticated systems.
Temperature accuracy: 0,5°C
Temperature: -55°C bis +125°C
Operating range: 2,7 V - 5,5 V
Programmable trip point and hysteresis with given values during boot
Serial standard 2-wire-bus-interface (TWI / I²C)
Thermal alarm through an interrupt or a comparator / thermostat
Until 8 LM75 can use the same bus
Shutdown mode for a low standby power consumption
5 V tolerant I/O on VDD = 3V
Low power consumption 250 µA (typical), 1 µA in the standby mode
Thermal protection for High-performance CPUs
As a solid thermometer
Fire-, heat alarm
Thermal monitoring in electrical systems (computer, power supply unit)
Copier / office elektronics
Temperature sensor LM75 on DIP8 Complete painted temperature sensor on DIP8 with condenser, suitable for the myTWI temperature sensor.