原标题：TI OV10640汽车1.3M照相模块TIDA-00421参考设计

　　TI公司的汽车1.3M照相模块TIDA-00421参考设计采用图像传感器OV10640和FPD-Link III串行化器DS90UB913A以及降压转换器TPS62170-Q1.支持1280x1080,VGA,QVGA和任何的缩放尺寸,具有高动态范围,高灵敏度和安全特性以及低功耗等特性.主要用在ADAS可视系统,环视系统和后视摄影镜头.本文介绍了OV10640主要特性,框图,以及汽车1.3M照相模块TIDA-00421参考设计主要特性,框图,电路图,材料清单和PCB设计图.

　　The OV10640 is the automotive industry’s first image sensor to utilize backside illumination technology, enabling industry-leading sensitivity and high dynamic range (HDR) up to 120 dB in the smallest possible automotive-grade package. The OV10640 is well suited for a broad range of advanced driver assistance systems (ADAS), including: 360-degree surround view, rear view, machine vision, blind spot detection, and lane departure warning.

　　The sensor’s 4.2-micron OmniBSI™ pixel is capable of recording highly detailed full-resolution 1.3-megapixel images and video at 60 frames per second (fps). The sensor uses OmniVision’s unique split pixel HDR technology, in which the scene information is sampled simultaneously rather than sequentially, minimizing motion artifacts and delivering superior image quality in RAW output in the most demanding and difficult lighting conditions.

　　The OV10640 contains a well-defined feature set to fulfill Automotive Safety Integrity Level (ASIL) according to ISO26262. The sensor fits into a compact chip-scale package (CSP), and is expected to complete AEC-Q100 Grade-2 qualifications

　　OV10640主要特性:

　　support for image size: 1280x1080,VGA, QVGA and any cropped size

　　high dynamic range

　　high sensitivity

　　safety features

　　low power consumption

　　image sensor processor functions:

　　- automatic exposure/gain control

　　- lens correction

　　- defective pixel cancelation

　　- HDR combination and tone mapping

　　- automatic black level correctionsupported output formats: RAWhorizontal and vertical sub-samplingserial camera control bus (SCCB)for register programminghigh speed serial data transferwith MIPI CSI-2external frame synchronizationcapability

　　parallel 12-bit DVP output

　　embedded temperature sensor

　　one time programmable (OTP)memory

　　Product Specifications

　　active array size: 1280 x 1080

　　power supply:

　　- analog: 3.14 ~ 3.47V

　　- digital: 1.425 ~ 1.575V

　　- DOVDD: 1.7 ~ 1.9V

　　- AVDD: 1.7 ~ 1.9V

　　power requirements:

　　- active: 250 mW

　　- standby: 100 μW

　　temperature range:

　　- operating: -40℃ to +105℃ sensor

　　ambient temperature and -40℃ to+125℃ junction temperature

　　output interfaces: 12-bit DVP,

　　MIPI/LVDS CSI-2

　　output formats:

　　- 20-bit combined RAW

　　- 12-bit compressed combined RAW

　　- separated 12-bit RAW

　　- 2x12-bit compressed RAW

　　- 16-bit log domain combined RAW

　　- 3x12-bit uncompressed RAW

　　lens size: 1/2.56"

　　lens chief ray angle: 9°

　　input clock frequency: 6 ~ 27 MHz

　　maximum image transfer rate:

　　- full resolution: 60 fps

　　scan mode: progressive

　　shutter: rolling shutter

　　dynamic range: 120 dB

　　pixel size: 4.2 μm x 4.2 μm

　　image area: 5410 μm x 4570 μm

　　package dimensions:

　　- aCSP: 7430 μm x 7190 μm

　　图1.OV10640框图

　　采用OV10640, DS90UB913A的汽车1.3M照相模块TIDA-00421参考设计

　　This camera design demonstrates a very small solution size for 1.3 Megapixel automotive cameras. Only a single coax connection is required to provide digital video, power, camera control and diagnostics. Output video format is 10-bit up to 100MHz or 12-bit up to 75MHz.

　　图2.汽车1.3M照相模块外形图

　　汽车1.3M照相模块主要特性:

　　Size optimized design fits on a single PCB 20x20 mm

　　Power supply optimized for small size and low noise

　　Diagnostic and Built In Self Test (BIST)

　　Single Rosenberger Fakracoax connector for digital video, power, control and diagnostics

　　1.3 Mpixel HDR image sensor OV10640 from OmniVision providing 12bit raw image data

　　Includes mounting tab for attachment directly to tripod

　　Power over Coax input can range from 4V to 17V

　　汽车1.3M照相模块主要应用:

　　• ADAS Vision Systems

　　• Surround View Systems

　　• Rear Camera

　　图3.汽车1.3M照相模块参考设计框图

　　汽车1.3M照相模块参考设计材料清单:

　　图7.汽车1.3M照相模块参考设计PCB正面和背面外形图