TUA6020 Infineon Technologies Corporation, TUA6020 Datasheet - Page 7

• Manufacturer Part Number: TUA6020
• Description: 2 Band Tv Tuner Mixer-oscillator-pll With Balanced If-amplifier
• Manufacturer: Infineon Technologies Corporation

Wireless Components
2.1 General Description
2.2 Features
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 I
loop is locked. It can be read by the processor via the I
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.
General




Mixer/Oscillator








IF-Amplifier




PLL














Suitable for analog and digital terrestrial TV tuner
Full ESD protection
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
balanced SAW preamplifier
Low output impedance
PLL with short lock-in time
High voltage VCO tuning output
Fast I
3 NPN bandswitch buffers
Internal LOW-MID/HIGH switch
Lock-in flag
Power-down reset
2
C bus
2
C bus. The device has three output ports. A flag is set when the
2 - 2
2
C bus.
Specification, April 2000
Product Description
targetpreliminary
TUA6020