TDA5744 Overview
The TDA5744 and TDA5745 are 2-band mixers/oscillators intended for VHF/UHF and hyperband tuners (see Fig.1). The Integrated Circuits (ICs) include two double balanced mixers and two oscillators, for the VHF and UHF band, and an IF amplifier. 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.
TDA5744 Key Features
- Mixers/oscillators for hyperband tuners
- Balanced mixer with a mon emitter input for VHF (single input)
- Balanced mixer with a mon base input for UHF (double input)
- 4-pin mon emitter oscillator for VHF
- 4-pin mon emitter oscillator for UHF
- Electronic band switch
- IF amplifier with a low output impedance to drive the SAW filter directly (≈2 kΩ load)
- Low power, low radiation and small size
- Pin patible single-chip synthesizer mixer/oscillator for Full Scale Tuners (FST) are available: TDA6404, TDA6405 and TDA
TDA5744 Applications
- Hyperband tuners for Europe using a 2-band mixer/oscillator in a switched concept. GENERAL DESCRIPTION The TDA5744 and TDA5745 are 2-band mixers/oscillators int