TDA7701 ,Battery-operated fully integrated FM tunerAPPLICATIONS■ INTEGRATED LNA (WITH AGC) AND IMAGE REJECTION MIXERTFBGA40■ LOW-IF ARCHITECTURE WITH ..
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TDA7701
Battery-operated fully integrated FM tuner
1/4
TDA7701February 2005
Main Features SINGLE-CHIP FM TUNER FOR LOW-VOLTAGE/
LOW POWER APPLICATIONS INTEGRATED LNA (WITH AGC) AND IMAGE
REJECTION MIXER LOW-IF ARCHITECTURE WITH ON-CHIP
CHANNEL SELECTION FILTER VCO WITH ON-CHIP VARACTOR INTEGRATED TUNING PLL WITH AUTO
STATION SEARCH FUNCTION ANALOG AND DIGITAL SIGNAL STRENGTH
INDICATION FULLY INTEGRATED FM DEMODULATOR
AND ADJUSTMENT-FREE STEREO
DECODER PROGRAMMABLE AUTOMATIC STEREO
BLEND AND SOFT MUTEI2 C/SPI-BUS CONTROLLED LOW POWER CONSUMPTION HIGH SENSITIVITY HIGH AUDIO QUALITY
DescriptionTDA7701 is a single-chip FM Tuner specifically
designed in mixed Bipolar-CMOS technology for
low-voltage/low-power applications, where the
minimization of external component count and
PCB size and complexity are mandatory: typical
examples are mobile phones and portable multi-
media equipment.
Housed in a small TFBGA40 package (5x5 mm), it
features the full FM signal processing chain from
antenna to stereo audio output: RF front-end pro-
cessing, IF processing, demodulation and stereo
decoding, I2 C/SPI-controlled tuning with station
detection.
Its low-IF architecture highly integrated RF/IF sec-
tions include a low-noise preamplifier with Auto-
matic Gain Control, an image rejection mixer and
on-chip high-Q channel selection filters that bring
to a minimum the external component count and
PCB complexity while guaranteeing good selectiv-
ity and image-rejection performances Thanks to its
on-chip varactor, the tuning-PLL controlled VCO
needs just one external inductor for low phase-
noise oscillation.
FM demodulation is performed by means of a fully
integrated circuit that eliminates the need for an
external LC tank while maximizing linearity.
The FM stereo signal is decoded through a fullyin-
tegrated, adjustment-free dedicated PLL; auto-
matic signal-dependent stereo blend and soft-
mute functions are provided.
A single external reference frequency is needed
for IC operation, and can be selected among those
commonly used in GSM applications (13/19.2/26/
38.4 MHz + 32768Hz real-time/sleep clock).
DATA BRIEFBATTERY-OPERATED FULLY INTEGRATED FM TUNER
Rev. 1
TDA7701 -
Figure 2. Functional Block Diagram
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TDA7701 -
Table 2. Revision History
. consequences
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by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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TDA7701 -
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