STA001 Datasheet, PDF (1/20 Pages) STMicroelectronics – RF FRONT-END FOR DIGITAL RADIO

STA001
RF FRONT-END FOR DIGITAL RADIO
PRODUCT PREVIEW
s SINGLE CHIP RECEIVER FOR SATELLITE
DIGITAL TRANSMISSION
s SUPERHETERODYNE RECEIVER WITH IF
OUTPUT
s HIGH INPUT INTERCEPT POINT, LOW
MIXER NOISE
s 54dB IF VGA GAIN RANGE
s ADJUSTABLE RF GAIN
s ADJUSTABLE IF GAIN
s INTEGRATED RF VCO
s INTEGRATED IF VCO
s INTEGRATED SYNTHESIZER
s I²CBUS COMPATIBLE PROGRAMMING
INTERFACE
s UNREGULATED 2.7 V TO 3.3V VOLTAGE
SUPPLY
s LOW COST EXTERNAL COMPONENTS
DESCRIPTION
The STA001 is an RF IC using STMicroelectronics
TQFP44
ORDERING NUMBER: STA001
HSB2 High Speed Bipolar Technology for one chip so-
lution for the Starman digital satellite radio receiver.
The STA001 is assembled in a TQFP44 package.
The frontend architecture is a double conversion re-
ceiver (see block diagram) .
The chip includes all the RF functions up to low IF
and manages the signals to and from the baseband.
BLOCK DIAGRAM
PADJ1, PADJ2
VDD1
VSS1
LNI, NLNI
SUPPLY1 :RF
LNA
CE
RF MIXER
AGC1, AGC2
SIP, SIN ^{SOP, SON}
GADJ1, GADJ2
IF1 to IF2 MIXER
SUPPLY4 :IF1,
IF2 &PLL2
VDD4
VSS4
IF2 BUFFER
RXI, NRXI
IF1 BUFFER
VGA
1.8366 Mhz
FLT2
FLT1
1338.14 - 1375.4 MHz
117.0806 MHz
TK2, NTK2
TK1,
NTK1
1st PLL
ENRFOSC
TLCK
LOCK
DETECTOR
VCO
CHARGE
PUMP
PHASE
DETECTOR
:363.625- 373.75
VDD2
VSS2
SUPPLY2 :PLL1 +
Crystal osc .
I2CBUS INTERFACE
CHANNEL SELECTION
SDA SCL
113.23KHz
3.68MHz
PHASE
DETECTOR
CHARGE
PUMP
VCO
: 1034
DIFFERENTIAL
SINGLE ENDED
:130
2nd PLL
:4
BUFFER
14.72MHz
MUX
OSC
SUPPLY3 :DIG.
XOSEL REF
XTAL1, XTAL2
M_CLK
VDD3
VSS3
November 2002
This is preliminary information on a new product now in development. Details are subject to change without notice.
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