TDA7515 Datasheet, PDF (1/5 Pages) STMicroelectronics – RF-FRONTEND FOR AM/FM-DSP-CARRADIOS WITH IF SAMPLING

TDA7515
RF-FRONTEND FOR AM/FM-DSP-CARRADIOS
WITH IF SAMPLING
PRODUCT PREVIEW
s RF AGC generation by RF and IF detection
s I/Q Mixer for FM IF 10.7MHz with image
rejection and programmable IF tank adjust for
FM and AM
s Preamplifier and mixer for IF 10.7MHz AM
upconversion
s VCO and programmable divider for “world
receiver”
s Programmable controlled IF-gain stage
TQFP44
ORDERING NUMBER: TDA7515
Additional features:
s High performance fast PLL for RDS-system
s Electronic alignment for the preselection stages
s All functions bus-controlled
DESCRIPTION
The frontend is a high performance tuner circuit for
1 BLOCK DIAGRAM
AM/FM - DSP carradios with 10.7MHz - IF sampling.
It contains mixer and IF amplifiers for AM and FM,
VCO and PLL synthesizer on a single chip.
Use of BICMOS technology allows the implementa-
tion of several tuning functions and a minimum of ex-
ternal components.
optional
AGC
2
ADJ
2
2
IF 10.7MHz
FM
PM
AM
PM
2
I
Q
AGC
2
TV1 TV2
AGC
DAGC
Bus
2
Interface
Supply
DIV :1/:2/:3
1/4 1/6
1/8 1/10 ^VCO
PLL
LPOUT LPAM LPFM LPHC
REFDIV
Fref
18/100kHz
00AT0037
July 2002
1/5
This is preliminary information on a new product now in development. Details are subject to change without notice.