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NXP Semiconductors Electronic Components Datasheet

TDA8262HN Datasheet

Fully integrated satellite tuner

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TDA8262HN
Fully integrated satellite tuner
Rev. 01 — 14 December 2004
www.DataSheet4U.com
Product data sheet
1. General description
The direct conversion QPSK demodulator is the front-end receiver dedicated to digital TV
broadcasting, satisfying both DVB-S and DBS TV standards. The wide range oscillator
(from 950 MHz to 2175 MHz) covers the American, European and Asian satellite bands,
as well as the SMA-TV US standard.
The Zero-IF (ZIF) concept discards traditional IF filtering and intermediate conversion
techniques.
Gain-controlled amplifiers in the RF guarantee optimum signal level. The variable gain is
controlled by the signal returned from the Satellite Demodulator and Decoder (SDD) and
applied to pin AGC.
The integrated LNA allows the IC to be directly connected to the LNB output. The LNA can
be by-passed by an I2C-bus selectable attenuation, providing a 20 dB extra attenuation in
order to handle higher input signal levels of up to 0 dBm per channel.
An integrated loop-through realizes a copy of the input RF signal for another
downconverter. This feature offers a BOM reduction and simplifies the application for dual
channel demodulation like watch and record.
Connected at the RF input, an RMS level detector provides through I2C-bus read mode
the full band input signal level.
The LO quadrature outputs are derived from a high performance integrated LC oscillator.
Its frequency is: -f---L---O-- = -f---X---T---A---L- . Thanks to the low phase noise performance of the
NR
integrated LC oscillator which controls the LO frequency, the synthesizer offers a good
performance for phase noise in the satellite band. The step size of the LO output
frequency is equal to the comparison frequency.
Control data is entered via the I2C-bus. The bus can be either 5.0 V or 3.3 V, allowing
compatibility with most of existing microcontrollers.
An 8-byte frame is required to address the device and to program the main divider ratio,
the reference divider ratio, the charge-pump current and the operating mode.
A flag is set when the loop is in-lock, readable during read operations, as well as the
Power-on reset flag and RF input level.
The device has four selectable I2C-bus addresses. Applying a specific voltage to pin AS
selects an address. This feature gives the possibility to use up to four TDA8262HN ICs in
the same system.


NXP Semiconductors Electronic Components Datasheet

TDA8262HN Datasheet

Fully integrated satellite tuner

No Preview Available !

Philips Semiconductors
TDA8262HN
www.DataSheet4U.com
Fully integrated satellite tuner
2. Features
s Direct conversion QPSK and 8PSK demodulation (ZIF)
s 3.3 V DC supply voltage (no 30 V required)
s Power-down modes selectable by bus
s 950 MHz to 2175 MHz frequency range
s High range input level;
x 70 dBm to 15 dBm at 75 (normal mode)
x Up to 0 dBm (20 dB attenuation configuration).
s Low noise RF input (integrated LNA)
s RF loop-through
s 0 dB to 55 dB continuous variable gain on RF input
s RF input level detector
s Switchable 0 dB to 9 dB additional gain on baseband output amplifier
s High AGC linearity (< 0.7 dB/step when used with an 8-bit DAC), AGC controlled
voltage between 0.3 V and 3 V
s Programmable 5 MHz to 36 MHz 5th-order baseband filters for I and Q paths
s Fully integrated PLL frequency synthesizer
s Low phase noise fully integrated oscillator
s Operation from a 16 MHz crystal or external clock
s 5 frequency steps from 125 kHz to 2 MHz
s Crystal frequency output to drive the demodulator IC
s Compatible with 5 V and 3.3 V I2C-bus
s Fully compatible and easy to interface with the PS digital satellite demodulators family
s 32-pin low thermal resistance package.
3. Applications
s Direct Broadcasting Satellite (DBS) QPSK demodulation
s Digital Video Broadcasting (DVB) QPSK demodulation
s BS digital 8PSK demodulation
s DVB-S2 8PSK demodulation.
4. Quick reference data
9397 750 13194
Product data sheet
Table 1: Quick reference data
Symbol Parameter
VCC supply voltage
ICC supply current
fosc oscillator frequency
∆Φ absolute quadrature error
Vo(I/Q)(rms)
recommended I and Q
output voltage RMS value
(QPSK signals)
fLPF LPF cut-off frequency
Conditions
measured at 10 MHz
5-bit controlled
Min Typ
3.15 3.3
- 175
950 -
0-
[1] -
200
Max Unit
3.45 V
- mA
2175 MHz
5 degree
- mV
- 5 to 36 -
MHz
Rev. 01 — 14 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
2 of 30


Part Number TDA8262HN
Description Fully integrated satellite tuner
Maker NXP
Total Page 30 Pages
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