GENERAL DESCRIPTION
The TDA8758 is an 8-bit video high-speed low-power analog-to-digital conversion (ADC) interface for YC and CVBS signal processing. It converts 1-of-3 CVBS input signals or 1-of-2 YC input signals into binary or two’s complement words at a sampling rate of 32 MHz. All analog signal inputs are digitally clamped and an ADC interface is provided on the Y/CVBS channel. A fast precharge on clamp and AGC is provided for start-up. All digital inputs and outputs are TTL compatible.

FEATURES
• Two 8-bit ADCs:
    – one Luminance or CVBS channel
    – one Chrominance channel
• Sampling rate up to 32 MHz
• Binary or twos complement 3-state TTL outputs for each channel
• Internal reference voltage regulator
• TTL-compatible digital inputs and outputs
• Power dissipation of 530 mW (typical)
• Input selector circuit (five selectable video inputs for CVBS or YC processing)
• Peak white enable input
• Clamp and Automatic Gain Control (AGC) functions for Y/CVBS channel (clamping on code 64 and Peak White level control at code 255)
• Clamp function for C channel (code 128)
• No sample-and-hold circuit required.

APPLICATIONS
• Video signal decoding
• Digital picture processing
• Frame grabbing
• Multimedia with the Philips Desktop Video chip set (and especially SAA7196 multistandard decoder and scaler).