OV2655-AAZ,CSP56,4.835x4.835x0.885mm,1/5-inch,UXGA 1600X1200,2MP Cellphone camera CMOS SENSOR,2百万像素手机摄像头CMOS图像传感器
Features
▄ ultra low power and low cost
▄ automatic image control functions: automatic exposure control (AEC), automatic white balance (AWB), automatic band filter (ABF), automatic 50/60 Hz luminance detection, and automatic black level calibration (ABLC)
▄ programmable controls for frame rate, AEC/AGC 16-zone size/position/weight control, mirror and flip, scaling, cropping and windowing
▄ image quality controls: color saturation, hue, gamma, sharpness (edge enhancement), lens correction, defective pixel canceling, and noise canceling
▄ support for output formats: RAW RGB, RGB565/555, YUV422/420 and YCbCr422
▄ support for images sizes: UXGA, and any arbitrary size scaling down from SXGA
▄ support for video or snapshot operations
▄ support for horizontal and vertical sub-sampling
▄ embedded anti-shake
▄ support for internal and external frame synchronization
▄ support for LED and flash strobe mode
▄ standard serial SCCB interface
▄ digital video port (DVP) parallel output interface
▄ MIPI serial output interface
▄ support for second camera sharing ISP and MIPI interface
▄ embedded one-time programmable (OTP) memory
▄ on-chip phase lock loop (PLL)
▄ programmable I/O drive capability
▄ support for black sun cancellation
▄ suitable for module size of 6.5mm x 6.5mm
▄ High Dynamic Range (HDR) mode for SVGA (800x600) or lower resolutions providing a dynamic range of ~ 85dB
Key specifications
▄ active array size: 1600 x 1200
▄ power supply:
core: 1.5VDC + 5%
analog: 2.45 ~ 3.0V
I/O: 1.7 ~ 3.0V
▄ power requirements:
active: 250 mW
standby: 75 µA
▄ temperature range:
operating: -20°C to 70°C
stable image: 0°C to 50°C
▄ output formats (8-bit): YUV(422/420) / YCbCr422, RGB565/555, 8-/10-bit raw RGB data
▄ lens size: 1/5"
▄ lens chief ray angle: 25° non-linear (see table 10-1)
▄ input clock frequency: 6 ~ 27 and 54 MHz
▄ S/N ratio: 37 dB
▄ dynamic range: 66 dB
▄ maximum image transfer rate:
UXGA (1600x1200): 15 fps for UXGA and any size
scaling down from SXGA
SVGA (800x600): 30 fps for SVGA and any size
scaling down from SVGA
▄ sensitivity: 1030 mV/(Lux • sec)
▄ shutter: rolling shutter
▄ scan mode: progressive
▄ maximum exposure interval: 1235 x tROW
▄ gamma correction: programmable
▄ pixel size: 1.75 µm x 1.75 µm
▄ well capacity: 7 Ke-
▄ dark current: 4 mV/sec @ 60°C
▄ fixed pattern noise (FPN): 1% of VPEAK to PEAK
▄ image area: 2842 µm x 2121 µm
▄ package dimensions: 4835 µm x 4895 µm
2 System level description
2.1 Overview
The OV2655 (color) CameraChip™ sensor is a low voltage, high-performance 1/5-inch 2.0 megapixel CMOS image sensor that provides the full functionality of a single chip UXGA (1600x1200) camera using OmniPixel3-HS™ technology in a small footprint package. It provides full-frame, sub-sampled, windowed or arbitrarily scaled 8-bit/10-bit images in various formats via the control of the Serial Camera Control Bus (SCCB) interface or MIPI interface.
The OV2655 has an image array capable of operating at up to 15 frames per second (fps) in UXGA resolution with complete user control over image quality, formatting and output data transfer. All required image processing functions, including exposure control, gamma, white balance, color saturation, hue control, defective pixel canceling, noise canceling, etc., are programmable through the SCCB interface. In addition, Omnivision CameraChip sensors use proprietary sensor technology to improve image quality by reducing or eliminating common lighting/electrical sources of image contamination, such as fixed pattern noise, smearing, etc., to produce a clean, fully stable, color image.
For storage purposes, the OV2655 includes a one-time programmable (OTP) memory.
The OV2650 has a one lane MIPI interface and a traditional parallel digital video port. The sensor's advanced integrated Image Signal Processor(ISP) can also be used by to communicate to an external secondary camera (digital video port) while providing continued output through the MIPI interface.
OmniVision's OV2650 sensor has a High Dynamic Range mode which can be used in SVGA or lower resolutions for either still image or video capturing.
2.2 architecture
The OV2655 sensor core generates stream pixel data at a constant frame rate, indicated by HREF and VSYNC. figure 2-1 shows the functional block diagram of the OV2650 image sensor. figure 2-2 shows an example application using an OV2650 sensor.
The timing generator outputs signals to access the rows of the image array, precharging and sampling the rows of array in series. In the time between pre-charging and sampling a row, the charge in the pixels decreases with the time exposed to the incident light. This is known as exposure time.
The exposure time is controlled by adjusting the time interval between precharging and sampling. After the data of the pixels in the row has been sampled, it is processed through analog circuitry to correct the offset and multiply the data with corresponding gain. Following analog processing is the ADC which outputs 10-bit data for each pixel in the array.
特性
▄ 超低功率，低成本
▄ 自动图像控制功能:自动曝光控制(AEC)、自动白平衡(AWB)、自动带滤(ABF)、自动50/60 Hz亮度检测、自动黑电平校准(ABLC)
▄ 可编程控制帧率，AEC/AGC 16区大小/位置/重量控制，镜像和翻转，缩放，裁剪和窗口
▄ 图像质量控制:色彩饱和度、色相、伽马、锐度(边缘增强)、镜头校正、缺陷像素消除和噪声消除。
▄ 支持输出格式:RAW RGB, RGB565/555, YUV422/420和YCbCr422
▄ 支持图像大小:UXGA，以及任何从SXGA缩小的任意大小
▄ 对视频或快照操作的支持
▄ 支持水平和垂直子采样
▄ 嵌入式anti-shake
▄ 支持内部和外部帧同步
▄ 支持LED和闪光灯模式。
▄ 标准串行SCCB接口
▄ 数字视频接口(DVP)并行输出接口
▄ MIPI串行输出接口
▄ 支持第二摄像头共享ISP和MIPI接口]
▄ 嵌入式一次性可编程(OTP)存储器
▄ 片上锁相环
▄ 可以编程的I/O驱动器能力。
▄ 支持取消黑日
▄ 适合尺寸为6.5mm x 6.5mm的模块。
▄ 高动态范围(HDR)模式用于SVGA (800x600)或更低的分辨率，提供~ 85dB的动态范围。
主要规格
▄ 活动阵列大小:1600 x 1200
▄ 电源:
核心:1.5VDC + 5%
模拟量:2.45 ~ 3.0V
i / o: 1.7 ~ 3.0v
▄ 能力要求:
活动:250兆瓦
待机:75µ
▄ 温度范围:
▄ 工作温度: -20°C至70°C
稳定图像: 0°C至50°C
▄ 8bit输出格式:YUV(422/420) / YCbCr422, RGB565/555, 8 /10位原始RGB数据
▄ 镜头尺寸:1/5 "
▄ lens chief ray angle: 25°非线性(见表10-1)]
▄ 输入时钟频率:6 ~ 27和54兆赫兹。
▄ 信噪比:37 dB
▄ 动态范围:66 dB .
▄ 最大图像传输速率:
UXGA (1600x1200): 15 fps适用于UXGA和任何尺寸
缩小SXGA的规模
SVGA (800x600): 30 fps用于SVGA和任何尺寸
从SVGA缩减
▄ 灵敏度:1030 mV/(Lux•sec)
▄ 快门:滚动快门
▄ 扫描模式:渐进扫描
▄ 最大曝光间隔:1235 x tROW
▄ 伽马校正:可编程的
▄ 像素大小:1.75 μ m × 1.75 μ m。
▄ 产能:7Ke-
▄ 暗电流:4 mV/秒@ 60°C
▄ 固定模式噪声(FPN): VPEAK to PEAK的1%
▄ 图像面积:2842 μ m × 2121 μ m
▄ 封装尺寸:4835µm × 4895µm
2系统级别说明
2.1概述
OV2655(彩色)CameraChip™传感器是一种低电压，高性能1/5英寸2.0百万像素CMOS图像传感器，提供单一芯片UXGA (1600x1200)相机的全部功能，使用OmniPixel3-HS™技术在一个小的封装。它通过串行摄像机控制总线(SCCB)接口或MIPI接口的控制，提供各种格式的全帧、次采样、开窗或任意缩放的8位/10位图像。
OV2655的图像阵列能够以高达15帧每秒(fps)的UXGA分辨率运行，用户可以完全控制图像质量、格式和输出数据传输。所有所需的图像处理功能，包括曝光控制、伽马、白平衡、色彩饱和、色相控制、缺陷像素消除、噪声消除等，都可以通过SCCB接口进行编程。此外，Omnivision CameraChip传感器使用专有的传感器技术，通过减少或消除常见的照明/电子源的图像污染，如固定模式噪声，涂抹等，以提高图像质量，产生干净，完全稳定的彩色图像。
出于存储目的，OV2655包括一个一次性可编程(OTP)内存。
OV2650有一个单行道MIPI接口和一个传统的并行数字视频端口。传感器的先进集成图像信号处理器(ISP)也可用于与外部辅助摄像机(数字视频端口)通信，同时通过MIPI接口提供持续输出。
OmniVision的OV2650传感器具有高动态范围模式，可用于SVGA或低分辨率的静态图像或视频捕捉。
2.2体系结构
OV2655传感器核心以恒定的帧率生成流像素数据，由HREF和垂直同步表示。OV2650图像传感器功能框图如图2-1所示。以OV2650传感器为例，使用示例如图2-2所示。
时序发生器输出信号以访问图像阵列的行，对阵列的行进行串联预充电和采样。在预充电和采样之间的时间，像素中的电荷随着暴露在入射光下的时间而减少。这就是所谓的曝光时间。
曝光时间是通过调节预充和采样之间的时间间隔来控制的。对行中像素点的数据进行采样后，通过模拟电路对其进行处理，校正偏置，并将数据与相应的增益相乘。接下来的模拟处理是ADC，它为阵列中的每个像素输出10位数据。
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