TDA8754EL

GENERAL DESCRIPTION

The TDA8754 is a triple 8-bit ADC with controllable gain and clamps for the digitizing of large bandwidth R, G, B signals. Clamp level, gain, and all the other settings are controlled via a serial interface (either I2C-bus or 3-wire, selected through a logic input). The gain is optimized for stability versus temperature variations.

FEATURES

• Triple 8-bit Analog-to-Digital Converter (ADC)
• Sampling rate up to 170 MHz
• IC controllable via a serial interface, which can be either I2C-bus or 3-wire, selected via a TTL input pin
• IC analog input 0.5 to 1.1 V (peak-to-peak value) to have full-scale ADC input
• Clamps for programming a clamp level through a clamping code between −63 and +64 by steps of 1 LSB
• Controllable gain stages: gain controlled independently on the 3 channels via the serial interface to have a full-scale resolution to 1%
• Low gain variation at different temperatures
• Analog bandwidth of 400 MHz
• Controllable PLL via the serial interface generates the ADC clock. It can be locked on line frequencies from 15 kHz up to 280 kHz.
• Integrated PLL divider
• Integrated clamp pulse and H and V LCD control pulses generation (independently adjustable in position and duration). Also a data enable signal can be generated, independently adjustable in position and duration with respect to HSYNC.
• The pixel clock is available at half the clock frequency
• Programmable phase clock adjustment cells
• Internal voltage regulators
• TTL compatible digital inputs
• 3.3 V CMOS compatible digital outputs
• Outputs: one port output up to 140 MHz or 2-port demultiplexed outputs on the full speed range. Operating mode selectable through the serial interface.
• Chip enable: high-impedance ADC output
• Power-down mode.