NXP Semiconductors TDA6405
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 hyperband) the TV bands can be covered.| Part No. | TDA6405 |
|---|---|
| Datasheet | TDA6405 Download |
| Manufacturer |  NXP Semiconductors |
| Description | 5 V mixer/oscillator-PLL synthesizers for hyperband tuners |
| Buy | Stock & Price |
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 common emitter input for VHF (single input)
● Balanced mixer with a common base input for UHF (double input)
● 4-pin common emitter oscillator for VHF
● 4-pin common emitter oscillator for UHF
● IF amplifier with a low output impedance to drive a SAW filter directly (≈2 kΩ load)
● Low power, low radiation, small size
APPLICATIONS
● Hyperband tuners for Europe using a 2-band mixer/oscillator in a switched concept.GENERAL DESCRIPTION
Two pins are available between the mixer output and the IF amplifier input to enable IF filtering for improved signal handling. Three PNP ports are provided for band switching. Band selection is made according to the band switch bits VHFL, VHFH and UHF.
