ST STV6110A User Manual
STV6110A
8PSK/QPSK low-power 3.3 V satellite tuner IC
Data Brief
Features
■ RF to baseband 8PSK/QPSK direct conversion
■ Single 3.3 V DC supply
■ Input frequency range 950 MHz to 2150 MHz
■ Supports 1 to 45 Msymbol/s
■ On-chip RF loop-through
■ Fully integrated PLL frequency synthesizer for
DVB-S2 (including loop filter)
■ Extremely low phase noise compliant with
DVB-S2 requirements
■ Low external component count
■ Low power consumption
■ Flexible crystal frequency output to drive the
demodulator IC
■ Continuously variable gain: 0 to 65 dB
■ Additional and programmable gain on
baseband amplifier: 0 to 16 dB
■ Programmable 5- to 36-MHz cut-off frequency
(butterworth 5th-order baseband filters)
■ Compatible with 5-V and 3.3 V I
2
C bus
Description
The STV6110A satellite tuner is a directconversion (zero IF) receiver dedicated to digital
TV broadcasting.
On the RF input is a low noise amplifier (LNA),
with buffer to supply the RF output for
loop-through, and a continuously variable gain
LNA to ensure an optimal signal level for the two
mixers. Each mixer, which down-converts the
signal to baseband, is followed by a low-pass filter
and amplifier. The baseband gain can be varied
by programming a register via the I
The LO signals are provided by an integrated PLL
which contains an on-chip voltage controlled
oscillator (VCO) meetin g string ent pha se noi se
requirements. The PLL loop filter is integrated.
The LO frequencies are programmable.
The comparison frequency for the phasefrequency detector (PFD) is generated by dividing
the crystal oscillator reference frequency. The
crystal frequency can be from 16 MHz to 32 MHz
depending on application.
2
C bus.
RF_OUT
RF_IN
AGC
PLL, dividers
XTAL_IN
XTAL_INN
XTAL_OUT
August 2008 Rev 1 1/5
For further information contact your local STMicroelectronics sales office.
Amplifier
DC offset compensation
2
C bus interface
I
IP
IN
QP
QN
SCL
SDA
www.st.com
5
Application STV6110A
1 Application
Figure 1. Application diagram for DVB-S2 front-end system
Choke
STV6110A
SatTuner
RF_IN
15 Ω
SDA, SCL
AGC
IN,IP
QN,QP
XTAL_OUT
27 MHz
LNBH23
I2C
16 MHz
DISEQC-RX
STV0903
SDAT, SCLT
AGCRF
IM,IP
QM,QP
XTAL_IN
DISEQC_IN
DISEQC_OUT
AUX_CLK
C
MPEG-4 / H.264
STx7100 or
STx7109
Decoder IC
2
I
2/5
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