TDA6404 Description
The TDA6404, TDA6405 and TDA6405A are programmable 2-band mixer/oscillator-PLL synthesizers intended for VHF/UHF and hyperband tuners (see Fig.1). The devices include two double balanced mixers and two oscillators for the VHF and UHF band, an IF amplifier and a PLL synthesizer. With proper oscillator application and by using a switchable inductor to split the VHF band into two sub-bands (the full VHF/UHF and...
TDA6404 Key Features
- Single chip 5 V mixer/oscillator-PLL synthesizer for hyperband tuners
- I2C-bus protocol
- 3 PNP band switch buffers (25 mA)
- 33 V tuning voltage output
- In-lock detector
- 5-level Analog-to-Digital Converter (ADC)
- 15-bit programmable divider
- Programmable reference divider ratio (512, 640 or 1024)
- Programmable charge pump current
- Balanced mixer with a mon emitter input for VHF (single input)
TDA6404 Applications
- Hyperband tuners for Europe using a 2-band mixer/oscillator in a switched concept. GENERAL DESCRIPTION The TDA6404, TDA6405 and TDA6405A are programmable 2-band