TDA6650TT Datasheet, PDF (3/55 Pages) NXP Semiconductors – 5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

Philips Semiconductors
5 V mixer/oscillator and low noise PLL synthesizer
for hybrid terrestrial tuner (digital and analog)
Product specification
TDA6650TT;
TDA6651TT
1 FEATURES
• Single-chip 5 V mixer/oscillator and low phase noise
PLL synthesizer for TV and VCR tuners, dedicated to
hybrid (digital and analog) as well as pure digital
applications (DVB-T)
• Five possible step frequencies to cope with different
digital terrestrial TV and analog TV standards
• Eight charge pump currents between 40 and 600 µA to
reach the optimum phase noise performance over the
bands
• Automatic Loop Bandwidth Control (ALBC) sets the
optimum phase noise performance for DVB-T channels
• I²C-bus protocol compatible with 2.5, 3.3 and 5 V
microcontrollers:
– Address + 5 data bytes transmission (I²C-bus write
mode)
– Address + 1 status byte (I²C-bus read mode)
– Four independent I²C-bus addresses
• Five PMOS open-drain ports with 15 mA source
capability for band switching and general purpose; one
of these ports is combined with a 5-step ADC
• Wide band AGC detector for internal tuner AGC:
– Six programmable take-over points
– Two programmable time constants
– AGC flag
• In-lock flag
• Crystal frequency output buffer
• 33 V tuning voltage output
• Fractional-N programmable divider
• Balanced mixers with a common emitter input for the low
band and for the mid band (each single input)
• Balanced mixer with a common base input for the high
band (balanced input)
• 2-pin asymmetrical oscillator for the low band
• 2-pin symmetrical oscillator for the mid band
• 4-pin symmetrical oscillator for the high band
• Switched concept IF amplifier with both asymmetrical
and symmetrical outputs to drive low impedance or
SAW filters i.e. 500 Ω//40 pF.
2 APPLICATIONS
• Digital and analog terrestrial tuners (OFDM, PAL, etc.)
• Cable tuners (QAM)
• Digital TV sets
• Digital set-top boxes.
2004 Mar 22
3