ST STV4100 User Manual

STV4100
Ultra-compact low-power 3.3-V terrestrial tuner IC
Data Brief
Features
! RF-to-baseband direct conversion
! 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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