LM75A Digital Temperature Sensor And Thermal Watchdog

The LM75A is a temperature-to-digital converter using an on-chip band gap temperature Sensor and Sigma-delta A-to-D conversion technique. The device is also a thermal detector providing an overtemperature detection output. The LM75A contains a number of data registers: Configuration Register (Conf) to store the device settings such as device operation mode, OS operation mode, OS polarity and OS fault queue as described in Section 7 "Functional description"; temperature Register (Temp) to store the digital temp reading, and set-point Registers (Tos and Thyst) to store programmable overtemperature shutdown and hysteresis limits, that CAN be communicated by a controller via the 2-wire serial I2C-bus Interface The device also includes an open-drain output (OS) which becomes active when the temperature exceeds the programmed limits. There are three selectable Logic address pins so that eight devices CAN be connected on the same bus without address conflict. The LM75A CAN be configured for different operation conditions. It CAN be set in normal mode to periodically monitor the ambient temperature, or in shutdown mode to minimize power consumption. The OS output operates in either of two selectable modes: OS Comparator mode or OS interrupt mode. Its active state CAN be selected as either HIGH or LOW. The fault queue that defines the number of consecutive faults in order to activate the OS output is programmable as well as the set-point limits. The temperature Register always stores an 11-bit 2's complement data giving a temperature resolution of 0.125 Cel. This high temperature resolution is particularly useful in applications of measuring precisely the thermal drift or runaway. The device is powered-up in normal operation mode with the OS in Comparator mode, temperature threshold of 80 Cel and hysteresis of 75 Cel, so that it CAN be used as a stand-alone thermostat with those pre-defined temperature set points.
By NXP Semiconductors
Part Manufacturer Description Datasheet Samples
LM75AIMME/NOPB Texas Instruments ±2°C Industry Standard Temperature Sensor with I2C/SMBus Interface 8-VSSOP -55 to 125
LM75AIM/NOPB Texas Instruments ±2°C Industry Standard Temperature Sensor with I2C/SMBus Interface 8-SOIC -55 to 125
LM75AIMMX/NOPB Texas Instruments ±2°C Industry Standard Temperature Sensor with I2C/SMBus Interface 8-VSSOP -55 to 125
LM75AIMM/NOPB Texas Instruments ±2°C Industry Standard Temperature Sensor with I2C/SMBus Interface 8-VSSOP -55 to 125
LM75AIMX/NOPB Texas Instruments ±2°C Industry Standard Temperature Sensor with I2C/SMBus Interface 8-SOIC -55 to 125
LM75AEB Texas Instruments Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
LM75A 's PackagesLM75A 's pdf datasheet
LM75AD SO
LM75ADP TSSOP




LM75A Pinout, Pinouts
LM75A pinout,Pin out
This is one package pinout of LM75A,If you need more pinouts please download LM75A's pdf datasheet.

LM75A Application circuits
LM75A circuits
This is one application circuit of LM75A,If you need more circuits,please download LM75A's pdf datasheet.


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