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TEA5757H Datasheet(PDF) 2 Page - NXP Semiconductors

Part # TEA5757H
Description  Self Tuned Radio STR
Download  32 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TEA5757H Datasheet(HTML) 2 Page - NXP Semiconductors

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1999 Aug 26
2
Philips Semiconductors
Product specification
Self Tuned Radio (STR)
TEA5757; TEA5759
FEATURES
• The tuning system has an optimized IC partitioning both
from application (omitting interferences) and flexibility
(removable front panel option) point of view: the tuning
synthesizer is on-chip with the radio
• The tuning quality is superior and requires no IF-counter
for stop-detection; it is insensitive to ceramic filter
tolerances
• In combination with the microcontroller, fast, low-power
operation of preset mode, manual-search, auto-search
and auto-store are possible
• The local (internal) controller function facilitates reduced
and simplified microcontroller software
• The high integration level (radio and tuning synthesizer
on one chip) means fewer external components with
regard to the communication between the radio and the
microcontroller (90% less components compared to the
digital tuning application of a radio IC with external PLL
tuning function) and a simple and small printed-circuit
board
• There will be no application considerations for the tuning
system, with regards to quality and high integration
level, since there will be no external 110 MHz buffers,
loop filter or false lock elimination
• The inherent FUZZY LOGIC behaviour of the Self
Tuned Radio (STR), which mimics hand tuning, yields a
potentially fast yet reliable tuning operation
• The level of the incoming signal at which the radio must
lock is software programmable
• Two programmable ports
• High selectivity with distributed IF gain
• Soft mute
• Signal dependent stereo-blend
• High impedance MOSFET input on AM
• Wide supply voltage range of 2.5 to 12 V
• Low current consumption 18 mA at AM and FM
(including tuning synthesizer)
• High input sensitivity
• Low output distortion
• Due to the new tuning concept, the tuning is
independent of the channel spacing.
GENERAL DESCRIPTION
The TEA5757; TEA5759 is a 44-pin integrated AM/FM
stereo radio circuit including a novel tuning concept.
The radio part is based on the TEA5712.
The TEA5757 is used in FM-standards in which the local
oscillator frequency is above the radio frequency
(e.g. European and American standards).
The TEA5759 is the version in which the oscillator
frequency is below the radio frequency
(e.g. Japanese standard).
The new tuning concept combines the advantages of hand
tuning with electronic facilities and features. User
‘intelligence’ is incorporated into the tuning algorithm and
an improvement of the analog signal processing is used for
the AFC function.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TEA5757H
QFP44
plastic quad flat package; 44 leads (lead length 1.3 mm); body
10
× 10 × 1.75 mm
SOT307-2
TEA5759H


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