Boardoza LM75A Temperature Sensor Breakout Board

The Boardoza LM75ADP 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.

Technical Specifications

ItemLM75A
Input Voltage5V
FunctionsDigital temperature sensor and thermal watchdog.
Working Voltage2.8V to 5.5V
Operating Temperature– 40°C to +125°
Board Dimensions20 x 20 mm
I2C Voltage Level3.3V and 5V

Board Spesific Properties

  • Pin-for-pin replacement for industry standard LM75 and offers improved temperature resolution of 0.125 °C and specification of a single part over power supply range from 2.8 V to 5.5 V.
  • I2C-bus interface with up to 8 devices on the same bus.
  • 11-bit ADC that offers a temperature resolution of 0.125 °C.
  • Temperature accuracy of: ±2 °C from −25 °C to +100 °C , ±3 °C from 55 °C to +125 °C.
  • Programmable temperature threshold and hysteresis set points.
    Supply current of 3.5 µA in shutdown mode for power conservation.
  • Stand-alone operation as thermostat at power-up.
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V.
  • MM per JESD22-A115 and 1000 V CDM per JESD22-C101.
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA.
  • Selectable I2C Address.

Board Pinout

PIN NumberPIN NameDescription
1OSOvertemp Shutdown output; open-drain
2SCLDigital input. I2C-bus serial clock input
3SDADigital I/O. I2C-bus serial bidirectional data line; open-drain
4GNDGround
5VCCPower supply ( 5VDC & 3V3DC )