AR023ZM Datasheet, PDF (15/35 Pages) ON Semiconductor – 1/2.7-Inch 2.1 Mp/Full HD Digital Image Sensor

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AR023ZM: 1/2.7-Inch 2.1 Mp/Full HD Digital Image Sensor
Features Overview
Features Overview
For a complete description, recommendations, and usage guidelines for product
features, refer to the AR023ZM Developer Guide.
3.0m Dual Conversion Gain Pixel
To improve the low light performance and keep the high dynamic range, a large (3.0um)
dual conversion gain pixel is implemented for better image optimization. With a dual
conversion gain pixel, the conversion gain of the pixel may be dynamically changed to
better adapt the pixel response based on dynamic range of the scene. This gain can be
switched manually or automatically by an auto exposure control module.
HDR
By default, the sensor powers up in HDR Mode. The HDR scheme used is multi-exposure
HDR. This allows the sensor to handle up to 105 dB of dynamic range. In HDR mode, the
sensor sequentially captures two exposures by maintaining two separate read and reset
pointers that are interleaved within the rolling shutter readout. The intermediate pixel
values are stored in line buffers while waiting for the two exposure values to be present.
As soon as a pixel's two exposure values are available, they are combined to create a
linearized 16-bit value for each pixel's response. The exposure ratio may be set to 4x, 8x,
16x, or 32x. Depending on whether HiSPi or Parallel mode is selected, the full 16 bit value
may be output, it can be compressed to 12 bits using Adaptive Local Tone Mapping
(ALTM), or companded to 12 or 14 bits.
Options to output T1 only, T2 only, or pixel interleaved data are also available. Individual
exposures may be read out in a line interleaved mode as described in the T1/T2 Line
Interleaved Mode section.
Resolution
The active array supports a maximum of 1928x1088 pixels to support 1080p resolution.
Utilizing a 3.0um pixel will result in an optical format of 1/2.7-inch (approximately
6.6mm diagonal).
Frame Rate
At full (1080p) resolution, the AR023ZM is capable of running up to 3060 fps.
Image Acquisition Mode
The AR023ZM supports two image acquisition modes:
• Electronic rolling shutter (ERS) mode
This is the normal mode of operation. When the AR023ZM is streaming, it generates
frames at a fixed rate, and each frame is integrated (exposed) using the ERS. When ERS
mode is in use, timing and control logic within the sensor sequences through the rows of
the array, resetting and then reading each row in turn. In the time interval between reset-
ting a row and subsequently reading that row, the pixels in the row integrate incident
light. The integration (exposure) time is controlled by varying the time between row
reset and row readout. For each row in a frame, the time between row reset and row
readout is the same, leading to a uniform integration time across the frame. When the
integration time is changed (by using the two-wire serial interface to change register
settings), the timing and control logic controls the transition from old to new integration
AR0230CS_DS Rev. 4 Pub. 8/15 EN
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