TDA6651TT datasheet(3/55 Pages) PHILIPS

Il numero della parte	TDA6651TT

Spiegazioni elettronici	5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

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Produttore elettronici	PHILIPS [NXP Semiconductors]

Homepage	http://www.nxp.com

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3 / 55 page

2004 Mar 22

3

Philips Semiconductors

Product speciﬁcation

5 V mixer/oscillator and low noise PLL synthesizer

for hybrid terrestrial tuner (digital and analog)

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 µAto

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.

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