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Product Description
2 - 2
TUA 6010XS
preliminary
Wireless Components
Specification, August 1999
2.1
Overview
The
TUA 6010XS
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 tuners.
The PLL block with four hard-switched chip addresses forms a digitally pro-
grammable phase locked loop. With a 4 MHz quartz crystal, the PLL permits
precise setting of the frequency of the tuner oscillator up to 900 MHz in incre-
ments of 62.5 kHz. The tuning process is controlled by a microprocessor via an
I
2
C bus. The device has three output ports, which all can also be used as input
ports (two TTL inputs and one A/D converter input). A flag is set when the loop
is locked. The input ports and lock flag can be read by the processor via the I
2
C
bus. The mixer-oscillator block includes two balanced mixers (double balanced
mixer with low-impedance input), two frequency and amplitude-stable balanced
oscillators for VHF, HYPER and UHF, a low-noise reference voltage source and
a band switch.
2.2
Features
I
PLL with short lock-in time; no asynchronous divider stage
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Fast I
2
C bus mode possible
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4 programmable chip addresses
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Short pull-in time for quick channel access and optimized loop stability
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3 high-current switch outputs
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2 TTL inputs
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5-level A/D converter
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Lock-in flag
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Power-down flag
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Few external components
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Frequency and amplitude-stable balanced oscillator for the VHF, HYPER
and UHF frequency range
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Optimum decoupling of input frequency from oscillator
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Double balanced mixer with wide dynamic range and low-impedance inputs
for the VHF, HYPER and UHF frequency range
I
Internal band switch
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Internal low-noise reference voltage source
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Package TSSOP 28
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Full ESD protection