Ultra-compact low-power 3.3-V terrestrial tuner IC
! 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
! Programmable channel filter covers 6 to 8 MHz
! Low external component count
! Low power consumption (625 mW typical)
! Temperature range -10° C to 70° C
! Crystal frequency output to drive the
! Compatible with 5-V and 3.3-V I2C bus
! Fully Nordig Unified (versions 1.0.2, 1.0.3, 2.0)
! DTG (D-Book) compliant
! Digitenne compliant
! VFQFPN-32 5x5x1 mm3, exposed pad down
! ECOPACK, environmentally-friendly package,
RoHS (2002/95/EC) compliant.
The STV4100 terrestrial tuner is a direct-
conversion (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
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.
! Terrestrial set-top box
www.DataSheet4U.com XTI, XTO
DC offset compensation
I2C Bus Interface
For further information contact your local STMicroelectronics sales office.