ST STV4100 User Manual
STV4100
Ultra-compact low-power 3.3-V terrestrial tuner IC
Data Brief
Features
! RF-to-baseband direct conversion
(IQ interface only)
! Single 3.3-V DC supply
! Input frequency range 174 to 230 MHz and
470 to 870 MHz
! Fully integrated VCO
! Harmonic rejection mixer stage
! Fully integrated RF AGC with RF power
monitoring
! Programmable channel filter covers 6 to 8 MHz
channel spacing
! Low external component count
! Low power consumption (625 mW typical)
! Temperature range -10° C to 70° C
! Crystal frequency output to drive the
demodulator IC
! Compatible with 5-V and 3.3-V I
! Fully Nordig Unified (versions 1.0.2, 1.0.3, 2.0)
compliant
! DTG (D-Book) compliant
! Digitenne compliant
! VFQFPN-32 5x5x1 mm
! ECOPACK, environmentally-friendly package,
3
, exposed pad down
RoHS (2002/95/EC) compliant.
2
C bus
Description
The STV4100 terrestrial tuner is a directconversion (zero-IF) receiver with quadrature
outputs intended for digital TV broadcasting.
On each VHF and UHF input is a low noise
amplifier with both switchable and variable gain 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 is programmable via
a dedicated pin.
The LO signals are provided by an integrated PLL
which contains an on-chip voltage controlled
oscillator meeting stringent phase noise
requirements. The LO frequencies are
programmable.
The comparison frequency for the
phase/frequency detector is generated by dividing
the crystal oscillator reference frequency. The
crystal frequency can be from 16 MHz to 31 MHz
depending on application.
Typical applications
! Terrestrial set-top box
! iDTV
! PCTV
RFAGC
VHF_IN
UHF_IN
XTI, XTO
FREF
Amplifier
PLL, dividers
DC offset compensation
I2C Bus Interface
BBAGC
BBIP
BBIN
BBQP
BBQN
SCL
SDA
March 2009 Rev 1 1/7
For further information contact your local STMicroelectronics sales office.
www.st.com
7
Applications STV4100
1 Applications
The STV4100 DVB-T tuner is designed to match optimally to industry-leading
STMicroelectronics demodulator ICs such as the STV0362.
Figure 1. Applications diagram for DVB-T system
Diplexer
DVB-T tuner
VHFN/P
UHFN/P
RFAGCO
STV4100
SDA, SCL
BBAGC
BBIN,BBIP
BBQN,BBQP
FREF
16 to 31 MHz
2
I
C
STV0362
SDAT,SCLT
AGC_IF
IM,IP
QM,QP
XTAL_I
RF_LEVEL
SDA,SCL
D[7:0],
CLKOUT,
STROUT,
D/PN,
ERROR
AUX_C LK
2
C
I
Decoder
2/7
STV4100 Applications
Figure 2. Applications diagram without loop-through
STV4100
3/7
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