TDA8262HN Datasheet, PDF (8/30 Pages) NXP Semiconductors – Fully integrated satellite tuner

Philips Semiconductors
TDA8262HN
Fully integrated satellite tuner
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.
Three independent area of power-down are available by programming I²C-bus:
• Loop-through part
• RF and synthesizer part
• Crystal oscillator and XTOUT part.
10.1 Gain distribution
RFATT
AGC
BBGAIN ^[3:0]
LNA /ATT
AGC
24
12 dB
dB
−8 dB
− 37
dB
10.2 dB
9 dB ^{10.2 dB 10.2 dB}
001aaa977
Fig 5. Gain distribution; typical values
11. Programming
The programming of the TDA8262HN is done through the I²C-bus. The READ/WRITE
selection is done through the R/W bit (address LSB). The TDA8262 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.
Pins used for the I²C-bus:
9397 750 13194
Product data sheet
• Pin SCL is the clock input
• Pin SDA is the data input/output
Rev. 01 — 14 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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