TVP70025I中文资料具有水平 PLL 的三路 10 位 90MSPS 视频和图形数字转换器数据手册TI规格书

描述 Description

The TVP70025I is a complete solution for digitizing video and graphic signals in RGB or YPbPr color spaces. The device supports pixel rates up to 90 MHz. Therefore, it can be used for PC graphics digitizing up to WXGA (1440 × 900) resolution at a 60-Hz screen refresh rate, and in video environments for the digitizing of digital TV formats, including HDTV up to 1080i.
The TVP70025I is powered from 3.3-V and 1.8-V supply and integrates a triple high-performance analog-to-digital (A/D) converter with clamping functions and variable gain, independently programmable for each channel. The clamp timing window is provided by an external pulse or can be generated internally. The TVP70025I includes analog slicing circuitry on the SOG inputs to support sync-on-luminance or sync-on-green extraction. In addition, TVP70025I can extract discrete HSYNC and VSYNC from composite sync using a sync slicer.
The TVP70025I also contains a complete horizontal phase-locked loop (PLL) block to generate a pixel clock from the HSYNC input. Pixel clock output frequencies range from 9 MHz to 90 MHz.
All programming of the device is done via an industry-standard I2C interface, which supports both reading and writing of register settings. The TVP70025I is available in a space-saving 100-pin TQFP PowerPAD package.

特性 Features

• Analog Channels
• Analog Input Multiplexers (MUXs)
• Three Digitizing Channels, Each With Independently Controllable Clamp, Gain, Offset, and Analog-to-Digital Converter (ADC)
• Offset: 1024-Step Programmable RGB or YPbPr Offset Control
• ADC: 10-Bit 90-MSPS A/D Converter
• Composite Sync: Integrated Sync-on-Green Extraction From Green/Luminance Channel
• Programmable Video Bandwidth Control
• Supports PC Graphics Inputs up to 90 MSPS
• Horizontal Phase-Locked Loop (PLL)
• 9-MHz to 90-MHz Pixel Clock Generation From HSYNC Input
• 5-Bit Programmable Subpixel Accurate Positioning of Sampling Phase
• Support for RGB/YCbCr 4:4:4 and YCbCr 4:2:2 Output Modes to Reduce Board Traces
• System
• Space-Saving 100-Pin TQFP Package
• Industrial Temperature Range –40°C to 85°C