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Maxim Integrated Products Introduces Integrated Proximity and Ambient Light Sensor

Maxim Integrated Products has launched the MAX44000, an infrared proximity and digital ambient-light sensor that detects light like the human eye. This sensor’s IC integrates two ADCs, three optical sensors, and digital functionality into a tiny 2 x 2 x 0.6 mm package to offer optical fusion and unparalleled light-sensing performance. The sensor is designed using Maxim’s own BiCMOS technology.

Low power consumption is observed in MAX44000, it utilizes only 5uA for ambient sensor activation, and only 7 uA for activation of both the proximity sensor and ambient light sensor. This gives extended durability to the battery. Touch-screen applications, like smartphones, industrial sensors, portable devices and presence detection are benefited by MAX44000.

The proximity sensor is vital for smartphones, as it allows sensing of an object within a certain distance during a phone call or any other preset experience. Once a sensed signal is received, it is transmitted through a DC ambient, infrared (IR) rejection front-end circuit and reaches an ADC. This process facilitates MAX44000 to operate in the presence of DC IR radiation. As it applies a single-pulse technique in the external IR LED, the sensor is resistant to fixed-frequency external IR radiation, promoting a more reliable sensor operation.

The ultraviolet (UV) and IR light have a strong impact on traditional light sensors, which the human eye fails to detect, which results in incorrect ambient-light readings. Maxim's BiCMOS technology is capable of integrating two photodiodes and an optical filter to refract UV and IR light. The MAX44000 will replicate the optical response of the human eye in diverse environments.

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