Philips Semiconductors
Product specification
Self Tuned Radio (STR)
TEA5757; TEA5759
FEATURES
• High selectivity with distributed IF gain
• Soft mute
• 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
• Signal dependent stereo-blend
• High impedance MOSFET input on AM
• Wide supply voltage range of 2.5 to 12 V
• The tuning quality is superior and requires no IF-counter
for stop-detection; it is insensitive to ceramic filter
tolerances
• Low current consumption 18 mA at AM and FM
(including tuning synthesizer)
• High input sensitivity
• Low output distortion
• In combination with the microcontroller, fast, low-power
operation of preset mode, manual-search, auto-search
and auto-store are possible
• Due to the new tuning concept, the tuning is
• The local (internal) controller function facilitates reduced
independent of the channel spacing.
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
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).
• 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 TEA5759 is the version in which the oscillator
frequency is below the radio frequency
(e.g. Japanese standard).
• The inherent FUZZY LOGIC behaviour of the Self
Tuned Radio (STR), which mimics hand tuning, yields a
potentially fast yet reliable tuning operation
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.
• The level of the incoming signal at which the radio must
lock is software programmable
• Two programmable ports
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
DESCRIPTION
VERSION
TEA5757H
TEA5759H
QFP44
plastic quad flat package; 44 leads (lead length 1.3 mm); body
10 × 10 × 1.75 mm
SOT307-2
1999 Aug 26
2
NXP [ NXP ]
