Description

The CXA3083R is a monolithic TV tuner IC that integrates local oscillator and mixer circuits for VHF and UHF bands, an IF amplifier, and a tuning PLL on a single chip. It enables further miniaturization of the tuner.

Specifications and features

• Superior cross modulation
• Balanced UHF oscillator (4 pins) with excellent oscillation stability
• Supports both I2C and 3-wire bus modes
• Automatic identification of 18, 19 or 27-bit control (during 3-wire bus mode)
• On-chip A/D converter (during I2C bus mode)
• On-chip high voltage drive transistor for charge pump
• Reference frequency selectable from 31.25, 50 or 62.5 kHz (when using a 4 MHz crystal)
• Low-phase noise synthesizer
• On-chip 4-output band switch (supports output voltages from 5 to 9 V)

Application Scenarios

• TV tuners
• VCR tuners
• CATV tuners

Comparison

• Integrates local oscillator and mixer circuits for VHF and UHF bands, IF amplifier and tuning PLL on a single chip
• Supports both I2C and 3-wire bus modes
• Low-phase noise synthesizer
• On-chip 4-output band switch (supports output voltages from 5 to 9 V)

• No significant disadvantages were found