GENERAL DESCRIPTION
The TDA8705 is a 6-bit high-speed dual analog-to-digital converter (ADC) for satellite video and other applications. It converts the two analog input signals into two 6-bit binary-coded digital words at a maximum sampling rate of 40 MHz. All digital inputs and outputs are TTL compatible, although a low-level sine wave clock input signal is allowed.

FEATURES
• 2 times 6-bit resolution
• Sampling rate up to 40 MHz
• High signal-to-noise ratio over a large analog input frequency range (5.8 effective bits at 10 MHz full-scale input at fclk = 40 MHz
• TTL output
• Two separated inputs (AC-coupling)
• TTL compatible digital inputs
• Low-level AC clock input signal allowed
• Internal reference voltage regulator (external reference regulation possible)
• Power dissipation only 250 mW (typical)
• Low analog input capacitance, no buffer amplifier required
• No sample-and-hold circuit required.

APPLICATIONS
High-speed analog-to-digital conversion for:
• DBS (Digital Broadcast Satellite)
• QPSK (Quadrature Phase Shift Keying) demodulation
• Video.