THine Electronics, Inc. is producing video ADCs based on the advanced ADC technology. We are the pioneer of the high-speed video ADCs for high definition video in the flat panel display market. Our products achieve industry-leading performance of analog-to-digital conversion and feature intelligent sync signal processor to enable automatic configuration.
The THC7984 integrates all the functions to digitize analog video signals on a single chip. It is used in such as HDTVs and projectors to support analog component video from HD players and RGB graphics from PCs, etc.
Linearity is very important for the image quality of Video ADC.
If INL is big...Distortion and color unevenness occured at a gradation part of an image
If DNL is big...Vertical noise occured at a gradation part of an image
The THC7984 integrates all the functions to digitize analog video signals on a single chip.
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ADC introductions for beginner
１．What is ADC？
An ADC, also called AD Converter, is a device for conversion of analog signal to digital signal.
ADC converts inputted voltage values to outputs numerical values.
２．Analog signals and Digital signals
based on digital signal of AV devices
３．Resolution of ADC specifications
The ADC is a ruler of voltage and resolutions is the scale on a ruler.
The required resolution varies from applications or equipment.
Video Signals：8 to 12bits
Audio Signals ：16 to 24bits
４．Conversion rate of ADC specifications
The digital signal is discrete for a direction at time. It need a sampling.
The required rate of conversion varies from applications or equipment.
Video Signal：around 10MHz to 200MHz
Audio Signal : around 10kHz to 200kHz
In case of 1080p-FHD
An analog to digital converts pixel data（2200×1125=247.5Mpixel） of 1 screen while 1/60 sec.
The rate of conversion needed 148.5MHz.
It can be revitalize an original analog signal by sampling at frequency 2 times as analog input signal band.
５．ADC Specifications for applications
The rate of resolution and conversion needed varies from usages.
６．Analog Video Signal types
|Type of Signal||Terminal||Primary output devices|
|Composite Video||RCA connector||
VCR, Video Game Console
|Y/C signal||S-Video||VCR, Video Game Console|
D-terminal（ D1～D5 ）
|DVD Player, DVD Recorder|
|PC signal（RGB）||PC connector（D-sub）||PCs, Workstation|
|Product Name||Number of Chanels||Bit/Pixel||Sampling Frequency||Package||Status|
|THC7984-17||3ch×2ports||30||10 to 170MSPS||LQFP80||MP|
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