OV µm Pixel Size Back Side Illuminated (BSI) 5 Megapixel CMOS Image Sensor

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1 OmniVision OV µm Pixel Size Back Side Illuminated (BSI) 5 Megapixel CMOS Image Sensor Circuit Analysis of the Pixel Array, Row Control, Column Readout, Analog Front End, and Pipelined A/D Converter Blocks For questions, comments, or more information about this report, or for any additional technical needs concerning semiconductor and electronics technology, please call Sales at Chipworks Richmond Road, Suite 500, Ottawa, ON K2H 5B7 Canada Tel: Fax:

2 OmniVision OV5642 Back Side Illuminated CMOS Image Sensor Table of Contents Overview Schematics Cell Library Signal Cross-Reference List About Chipworks

3 OmniVision OV5642 Back Side Illuminated CMOS Image Sensor Overview List of Figures...Page 1 List of Schematics...Page 1 Introduction...Page 5 Brief Design Overview...Page 5 Component Descriptions...Page 9 Device Summary Sheet...Page 12

4 OmniVision OV5642 Back Side Illuminated CMOS Image Sensor Page 1 List of Figures To view, please click on the appropriate bookmark in the panel on the left Package Markings Package X-Rays Die Photographs Die Markings Carrier Wafer and Imager Die Overview Die Photograph Die Photograph Metal Die Photograph Imaged Area Die Architecture Die Utilization Table Minimum Gate Length Cross Section Pixels at Poly N-Photocathode SCM List of Schematics Top Level Diagram Pixel Array Active Pixel Dummy Pixel Pixels BL Pixels TL Pixels RF Row Control Row Drivers 2X 3.0.1A Row Drivers 2X NAND Gate RST Driver

5 OmniVision OV5642 Back Side Illuminated CMOS Image Sensor Page TX Drivers Input Buffers Buffers Buffers Row Drivers B Row Drivers T Row Drivers D Column Readout Dummy Signal Switches Input Signal Switches Switch Circuits A Switch Circuits Switch Circuits A Switch Circuits Column Amplifiers Sense Amplifier Column Decoders Column Decoders Shift Register Sample and Hold Circuits SH Circuits 16X Sample and Hold Analog Front End Amplifier Voltage Buffer Voltage Buffer Voltage Buffer Sample and Hold Amplifier PGA Bias 1

6 OmniVision OV5642 Back Side Illuminated CMOS Image Sensor Page Capacitor PGA Amplifier PGA Bias Input Cap Signal Buffers Bias Circuits Reference Generator Resistor Ladder VREF Switch Bias Generator Reference Generator Bias Voltages Current Selectors Bias Current Bias Generator Pipelined ADC Comparators Comparator Cell Amplifier Amplifier Amplifier Comparators DAC Switches DAC Switches Precharge Circuit Bias Switches Bias Switches ADC Stage MDAC Input Capacitors

7 OmniVision OV5642 Back Side Illuminated CMOS Image Sensor Page Feedback Capacitors Bias Circuit Bias Circuit ADC Stage MDAC ADC Stage MDAC Input Capacitors Feedback Capacitors Bias Circuit Bias Circuit ADC Stage MDAC Input Capacitors Feedback Capacitors Amplifier Bias Circuit ADC Stage MDAC Input Capacitors Feedback Capacitors ADC Stage 6 to ADC Stage ADC Stage Timing and Correction Time Alignment Digital Correction Digital Correction Digital Correction Carry Cell ADC Bias Circuits Bias Voltages Bias Voltages

8 About Chipworks Chipworks is the recognized leader in reverse engineering and patent infringement analysis of semiconductors and electronic systems. The company s ability to analyze the circuitry and physical composition of these systems makes them a key partner in the success of the world s largest semiconductor and microelectronics companies. Intellectual property groups and their legal counsel trust Chipworks for success in patent licensing and litigation earning hundreds of millions of dollars in patent licenses, and saving as much in royalty payments. Research & Development and Product Management rely on Chipworks for success in new product design and launch, saving hundreds of millions of dollars in design, and earning even more through superior product design and faster launches. Contact Chipworks To find out more information on this report, or any other reports in our library, please contact Chipworks at: Chipworks 3685 Richmond Rd. Suite 500 Ottawa, Ontario K2H 5B7 Canada T: F: Web site: info@chipworks.com Please send any feedback to feedback@chipworks.com

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