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Triple 8-bit video ADC captures graphic signals at 270 MSPS


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The Philips Semiconductors TDA8754 is a triple 8-bit ADC with an integrated PLL running from 12 to 270 MSPS and analog preprocessing functions (a clamp and PGA) optimized for capturing RGB/YUV graphic signals. The PLL generates a pixel clock from two inputs (HSYNC and COAST).

The TDA8754 offers sync processing for sync-on-green applications. A clamp signal may be generated internally or provided externally. The clamp levels, gains and other settings are controlled via the I2 C-bus interface.

The 8754 supports display resolutions up to QXGA (2048 x 1536) at 85 Hz. It is designed to convert RGB/YUV signals coming from an analog source into digital data used by a LCD driver (pixel clock up to 270 MHz with analog source) or projection systems. The three ADCs are designed to convert R, G and B (or Y, U and V) signals at a maximum frequency of 270 MSPS. The ADC input range is 1 V (p-p) full-scale and the pipeline delay is 2 ADC clock cycles from the input sampling to the data output.

Maximum data rate:
Single port mode: 140 MHz
Dual port mode: 270 MHz
PLL generates the ADC sampling clock that can be locked on the line frequency from 15 to 150 kHz

Input:
410 MHz analog bandwidth
Two independent analog inputs
Analog input from 0.5 to 1 V (p-p) to produce a full-scale ADC input of 1 V (p-p)

Applications:
RGB/YUV high-speed digitizing
LCD panels drive
LCD projection system

The TDA8754 is available now in LQFP-144 packages.

TDA8754 Data Sheet

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