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TDA8263HN Datenblatt(PDF) 7 Page - NXP Semiconductors

Teilenummer TDA8263HN
Bauteilbeschribung  Fully integrated satellite tuner
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Hersteller  NXP [NXP Semiconductors]
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9397 750 13193
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 14 December 2004
7 of 28
Philips Semiconductors
TDA8263HN
Fully integrated satellite tuner
The internal loop controls a fully integrated VCO, to cover the range from 950 MHz to
2175 MHz. This VCO provides both in phase and quadrature signals to drive the two
mixers.
The output of the 15-bit programmable divider passes through the phase comparator
where it is compared in both phase and frequency to the comparison frequency (fcomp).
This fcomp is derived from the signal present at the XT/XTN pins (fXTAL), divided down in
the reference divider. The buffered signal on pin XTOUT is able to drive the crystal
frequency input of the SDD, which saves a crystal in the application.
The output of the phase comparator drives the charge pump and loop amplifier section.
Pin CP is the output of the charge pump, and pin VT drives the tuning voltage to the
varicap diode of the voltage controlled oscillator. The loop filter has to be connected
between pins CP and VT.
For test and alignment purposes, it is possible to release the tuning voltage output and to
apply an external voltage on the VT pin, as well as to select the charge pump sink, source
or off.
10.1 Gain distribution
11. Programming
The programming of the TDA8263HN is done through the I2C-bus. The READ/WRITE
selection is done through the R/W bit (address LSB). The TDA8263HN fulfils the fast
mode I2C-bus specification, according to the
Philips I2C-bus specification, see document
9398 393 40011.
11.1 I2C-bus inputs
The I2C-bus lines SCL and SDA can be connected to an I2C-bus system tied to either
3.3 V or 5.0 V, which allows direct connection to most of existing microcontrollers.
Data transfer format should be MSB first, and 8-bit word + acknowledge bit.
Fig 4.
Gain distribution; typical values
10.2 dB
001aaa977
AGC
LNA /ATT
AGC
RFATT
BBGAIN [3:0]
24
dB
−37
dB
12 dB
−8 dB
9 dB
10.2 dB
10.2 dB


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