TDA7528 Datasheet, PDF (1/5 Pages) STMicroelectronics – AM/FM car radio Front-End receiver for IF sampling tuners

TDA7528
AM/FM car radio Front-End receiver for IF sampling tuners
Data Brief
Feature summary
■ High-performance AM/FM front-end chip for if
sampling car-radio tuners
■ Compatible with AM (LW, MW, SW) / FM (EU,
US, JAPAN, OIRT) / WEATHER BAND / HD
radio / DRM applications
■ Ready for multi-tuner applications (phase
diversity, background tuner)
■ Image rejection FM mixer with dual input
specialized for different front-end circuits
■ Integrated AM preamplifier and tank for lower-
cost applications
■ Image rejection AM mixer
■ Fully integrated fractional tuning PLL with two
V_CO's for diversity systems
■ world tuning-capable
■ Integrated if tank
■ If amplifier with agc with four inputs for
connection of up to four ceramic filters
■ Fully electronically adjustable
■ I²C /SPI controlled
Description
The TDA7528 is a frontend module for use in car
radio receivers on the 50kHz - 108MHz and
161MHz - 163 MHz frequency bands. Its field of
use includes all the current radio broadcast
services worldwide for AM radio (long, medium
and short wave), FM radio (US, European,
Japanese and OIRT bands) and US weather
band. Digital standards such as DRM and HD
radio (IBOC) can also be handled.
LQFP64
The system is designed to be single super-
heterodyne with an intermediate frequency of
10.7 MHz. The IF signal is digitized, filtered and
demodulated in the appropriate STA3005
backend IC.
The combination of two independently-operating
frontends with the STA3005 backend makes DDA
(Digital Directional Antenna) operation possible or
the simultaneous reception of two freely-
selectable frequencies with any combination of
types of demodulation.
The TDA7528 frontend IMR mixer has separate
input and output stages for AM frequency bands
up to 30MHz (narrowband services) and for FM
frequencies above 30MHz (broadband signals).
As an option, the AM path can be operated with
an integrated preamplifier stage and an integrated
low-pass filter to reduce interfering input signals
on the IF and image frequencies. The FM mixer
has two inputs: the more sensitive (lower noise)
input is intended for use with a low-gain, passive
pre-selection stage; the second input is intended
for use with an active preamplifier stage yielding a
high level signal calling for a higher IP3.
Order codes
Part number
TDA7528
Package
LQFP64
Packing
Tube
June 2006
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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