PAJ7620U2

The PAJ7620U2 from PixArt Imaging is a compact, integrated gesture recognition sensor designed for HMI devices. It combines gesture recognition capabilities with a general I2C interface, forming a complete image analytic sensor system. This sensor can detect 9 distinct human hand gestures, including movements like up, down, left, right, forward, backward, circle-clockwise, circle-counter-clockwise, and waving. Additionally, it features built-in proximity detection to sense approaching or departing objects.

Key features include multiple operation modes (Gesture/Cursor/Image), a flexible power-saving scheme suitable for battery-operated devices, and dual communication interfaces: I2C for gesture and cursor modes, and 4-wire SPI for image mode. The I2C interface supports speeds up to 400 Kbit/s, while the SPI interface ranges from 22-48 MHz depending on the mode.

The sensor boasts a 60x60 pixel array with 20x20 µm pixel size, capable of a maximum frame rate of 720 fps at a 240 report rate. It offers ambient light immunity and noise cancellation. The PAJ7620U2 operates with supply voltages VDD: 2.8-3.6V, VBUS: 1.8-3.3V, and VLED: 3.0-4.2V, with low current consumption in various states, including operation (2.82 mA) and standby (1.5-2.3 mA).

Packaged in a 5.2x3x1.88 mm LGA module, the PAJ7620U2 is a complete sensor solution with an integrated IR LED and optics lens, making it suitable for applications such as PAD phones, tablet PCs, and automotive systems.