Melexis MLX90640 Far Infrared Thermal Sensor is a fully calibrated 32 x 24 pixel thermal IR array in a compact, industry-standard, 4-lead TO39 package, featuring a digital interface. The MLX90640 contains 768 FIR (Far Infrared) pixels. An ambient sensor is integrated to measure the ambient temperature of the chip and supply sensor to measure the V_DD. The outputs of all sensors IR, Ta and V_DD are stored in internal RAM and are accessible through I²C.