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ON Semi intros image sensor with global shutter, OIS driver

07 Mar 2016  | Vivek Nanda

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The new optical image stabilisation (OIS)/Auto Focus (AF) driver is the LC898123AXD, which the ON Semiconductor is targeting at smart phones, tablets, notebooks and wearables.

LC898123AXD

Figure 2: The LC898123AXD offers a "High Level Command" function to standardise commands from the main CPU to the camera module.

The LC898123AXD integrates a DSP core with multiple analogue peripherals for image stabilisation, auto-focus control, and H-bridge and constant-current drivers. There's also on-chip Flash memory for the DSP program and calibration parameters. The company claims this saves about 90% of the overhead time needed on start-up when loading that information from conventional memory.

The company claims low current consumption for improved battery lifetime. For OIS, the datasheet rates the constant current linear driver at x2ch, Ifull at 195mA and H-bridge driver at x2ch, Io(max) at 220mA.

The 32bit DSP allows support for various VCM actuators and is optimised for OIS/AF signal processing. It covers several functions, including servo control, gyro data filtering and host command interface. The chip also offers a "High Level Command" function to standardise commands from the main CPU to the camera module. ON Semiconductor says this enables phone developers to use standard commands for multiple camera modules/actuators without changing the CPU software.

The LC898123AXD comes in a lead-free WLCSP-35 package at $2.18 per unit in 4,000-unit quantities.


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