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THERMO 4 Click - MikroElektronika LM75A Digital Temperature Sensor

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  • THERMO 4 Click - MikroElektronika  LM75A Digital Temperature Sensor

    THERMO 4 click carries the LM75A digital temperature sensor and thermal watchdog. The sensor has the range from −55 °C to +125 °C. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over I2C interface, with additional functionality provided by the INT pin on the mikroBUS™ line.

    LM75A features

    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 sensor 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 temperature register always stores an 11-bit 2's complement data giving a temperature resolution of 0.125 °C. This high-temperature resolution is particularly useful in applications of measuring precisely the thermal drift or runaway.


    Type Temperature,Humidity
    Applications System thermal management, personal computers, electronics equipment, industrial controllers
    On-board modules LM75A
    Key Features Temperature range: from −55 °C to +125 °C
    Interface I2C,GPIO
    Input Voltage 3.3V or 5V
    Compatibility mikroBUS
    Click board size S (28.6 x 25.4 mm)

    Pinout diagram

    This table shows how the pinout on THERMO 4 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

    Notes Pin Mikrobus logo.png Pin Notes
    NC 1 AN PWM 16 NC
    NC 2 RST INT 15 INT Overtemp Shutdown output
    NC 3 CS TX 14 NC
    NC 4 SCK RX 13 NC
    NC 5 MISO SCL 12 SCL I2C-bus serial clock input
    NC 6 MOSI SDA 11 SDA I2C-bus serial bidirectional data line
    Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
    Ground GND 8 GND GND 9 GND Ground

    Jumpers and settings

    Designator Name Default Position Default Option Description
    JP1 VCC.SEL. Left 3V3 Power Supply Voltage Selection 3V3/5V, left position 3V3, right position 5V
    JP2 ADD0 Left 0 I2C address select bit 2
    JP3 ADD1 Left 0 I2C address select bit 1
    JP4 ADD2 Left 0 I2C address select bit 0


    Code examples for THERMO 4 click, written for MikroElektronika hardware and compilers are available on Libstock.


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