High resolution optical image stabilization IC targets smartphone camera modules

November 12, 2013 // By Julien Happich
High resolution optical image stabilization IC targets smartphone camera modules
ON Semiconductor’s LC898111AXB-MH optical image stabilization (OIS) IC combines both the controller and driver functionality necessary for dealing with OIS in the camera modules incorporated into smartphone handsets.
A significantly increased shutter speed leads to exposure compensation that is far superior to competing OIS solutions, claims the manufacturer.

As such, it enables precise suppression control of camera shaking, it also allows the implementation of Pan/Tilt function indispensable for walk-and-take situations. The output of the IC’s integrated pulse width modulated (PWM) driver lowers power consumption as well as reduces the effect of noise on image quality. This highly-integrated, program-ready IC enables engineers to minimize the number of external components necessary in the system design - thereby reducing overall power consumption and board real estate utilisation.

The LC898111AXB-MH has numerous built-in digital and analogue signal processing mechanisms. These include a two-channel position sensing circuit, a gyro-filter interface circuit and lens-servo circuit. The position sensing circuit contains a hall-amp circuit, constant current DAC, gain control operational amplifier and 12-bit ADCs for each channel. The gyro-filter interface circuit is fully compatible in both analogue and digital signals. Both the gyro-filter interface and lens-servo circuits are adjustable through the I2C and SPI bus interfaces, allowing comprehensive configuration when connecting with various gyros and actuators. As a result, the device can cover a wider shaking frequency range and thus offers a more expansive image stabilization angle. The LC898111AXB-MH comes in a 2.57x3.22x0.69mm lead-free/halogen-free P48-pin WLP package.

Visit ON Semiconductor at www.onsemi.com


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