Electronics

Camera Thermal IR Array Breakout MLX90640 (Qwiic)

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Description

The MLX90640 IR Array Breakout is equipped with a 32x24 array of thermopile sensors creating, in essence, a low-resolution thermal imaging camera. With this breakout, you can detect surface temperatures from many feet away with an accuracy of ±1.5°C (best case). To make it even easier to get your infrared image, all communication is enacted exclusively via I2C, utilizing our handy Qwiic system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a Breadboard.

This specific IR Array Breakout features a 55°x35° field of view with a temperature measurement range of -40°C-300°C. The MLX90640 IR Array has pull-up resistors attached to the I2C bus; both can be removed by cutting the traces on the corresponding jumpers on the back of the board. Please be aware that the MLX90640 requires complex calculations by the host platform so a regular Arduino Uno (or equivalent) doesn’t have enough RAM or flash to complete the complex computations required to turn the raw pixel data into temperature data. You will need a microcontroller with 20,000 bytes or more of RAM. To achieve this, we recommend a Teensy 3.1 or above (ESP8266 or ESP32 works well too).

Specs:

  • Operating Voltage: 3V-3.6V
  • Current Consumption: ~18mA
  • Field of View: 55°x35°
  • Measurement Range: -40°C-300°C
  • Resolution: ±1.5°C
  • Refresh Rate: 0.5Hz-64Hz
  • I2C Address: 0x33
  • 2x Qwiic Connection Ports

Qwiic_IR_Array_MLX90640_Hookup_Guide_Web.pdf