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TUA6020 Datasheet(PDF) 7 Page - Infineon Technologies AG

Part # TUA6020
Description  2 Band TV Tuner Mixer-Oscillator-PLL with balanced IF-Amplifier
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TUA6020 Datasheet(HTML) 7 Page - Infineon Technologies AG

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Product Description
2 - 2
TUA6020
targetpreliminary
Wireless Components
Specification, April 2000
2.1
General Description
The TUA6020 device combines a digitally programmable phase locked loop
(PLL), with a mixer-oscillator block including two balanced mixers and oscilla-
tors for use in TV and VCR tuners.
The PLL block with four selectable chip addresses forms a digitally programma-
ble phase locked loop. With a 4 MHz quartz crystal, the PLL permits precise set-
ting of the frequency of the tuner oscillator up to 1024 MHz in increments of
31.25, 50, 62.5 or 166.7 kHz. The tuning process is controlled by a micropro-
cessor via an I2C bus. The device has three output ports. A flag is set when the
loop is locked. It can be read by the processor via the I2C bus.
The mixer-oscillator block includes two balanced mixers (one mixer with high-
impedance input and one mixer with a balanced low-impedance input), two fre-
quency and amplitude-stable balanced oscillators for LOW/MID and HIGH, an
IF amplifier, a low-noise reference voltage source, and a band switch.
2.2
Features
General
 Suitable for analog and digital terrestrial TV tuner
 Full ESD protection
Mixer/Oscillator
 High impedance mixer input for LOW/MID band
 Low impedance mixer input for HIGH band
 4 pin oscillator for LOW/MID band
 4 pin oscillator for HIGH band
IF-Amplifier
 balanced SAW preamplifier
 Low output impedance
PLL
 PLL with short lock-in time
 High voltage VCO tuning output
 Fast I2C bus
 3 NPN bandswitch buffers
 Internal LOW-MID/HIGH switch
 Lock-in flag
 Power-down reset


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