TUA4306 Fast Delivery |IC PHOENIX CO.,LIMITED

TUA4306 ,One Chip car radio, AM/FM ReceiverFeatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
TUA4306 ,One Chip car radio, AM/FM ReceiverICs for Communications1-Chip Car RadioTUA 4306 Specification 16.3.99Edition 16.3.99 Ausgabe 16.3.9 ..
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TUA4306
One Chip car radio, AM/FM Receiver
TUA 4306
1-Chip Car Radio
ICs for Communications
Edition 16.3.99
Published by Siemens AG,
Bereich Halbleiter, Marketing-
Kommunikation, Balanstraße 73,
81541 München
© Siemens AG 1995.
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Table of ContentsPage
1Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.1AM/FM-Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2FM-Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2.1FM-Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2.2FM-IF Demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.3Stereodecoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.4AM Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4.1AM/FM-Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.2FM-MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.3Stereodecoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.4AM - MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Blockdiagram 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Blockdiagram 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Blockdiagram 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Blockdiagram 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Operational Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15AC / DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Truthtables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25Test Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26Application Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27Diagram 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Diagram 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29Diagram 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Last Edition:DOK-Nr. V66047
from July 22nd 1998
1Features
1.1AM/FM-ReceiverHigh flexibility with an external preamplifier stage for AM and FMStrictly symmetrical RF partsSeparate mixers for AM and FM modeSym. or asym. mixer inputsOnly one 2-pin-oscillator for the 1st LO; in AM mode the oscillator frequency is divided1st LO with LC-tank circuit1st LO at 100 MHz range1st LO decoupled counter output1st LO decoupled divided counter outputImproved low phase noiseFM/AM field strength output combined
1.2FM-Mode
1.2.1FM-Receiver
In this mode, the receiverpart is comprised of a mixer, an oscillator, a prestage control and an IF post amplifi-
cation.Integrated AGC generation for PIN Diodes and MOSFETsHigh level mixer inputHigh input/output 3rd order interceptpoint
1.2.2FM-IF Demodulator
The FM-IF-demodulator has been developed especially for car radio applications.7stage limiter amplifierCoincidence demodulatorField strength output (combined with AM)Fixed mute depth (with full muting typ 80dB)Multipath detector with analog output
1.3Stereodecoder
This part provides the stereo decoder function and noise blanking for FM car radio applications.Internal reference voltage sourceAdjustment free oscillator with ceramic resonator 456 kHzPilot dependent mono/stereo switching with hysteresisStereo indicator outputAnalog mono/stereo blend control (stereo noise control, SNC)Pilot canceller (19 kHz)Adjacent channel noise suppression (114 kHz)Mute facilityAnalog deemphasis control (high cut control, HCC)Interference noise detector with integrated high-pass filter (IF level signal or MPX input)MPX-input low-pass filterNoise blanking at MPX -demodulator outputs- L, R audio is common to AM Mode
1.4AM Mode
In this mode, the IC is comprised of a mixer, an oscillator with a divider by 4, 6, 8 or 10, a prestage control,
2nd mixer to convert the 1st IF to the 2nd IF, 2nd local force oscillator ( buffer for external source), automatic
gain controlled amplifier and quasisynchronous demodulator.
The same oscillator is used in AM and FM mode.2nd mixer with force input for mixing frequencyOutput for AM IF counterWide range 2nd IF AGC amplifierQuasi synchronous demodulator for AM modeFast AM search tuning stop featureHCC for AM
PinningOrdering Information
Circuit DescriptionGeneral Description
The TUA 4306 is a one chip car radio system consisting of AM/FM receiver, AM-Up/Down conversion, AGC
amplifier / demodulator, FM-IF limiter amplifier / demodulator and stereodecoder / noiseblanker.
4.1AM/FM-Receiver
The AM/FM-receiver part includes a 2-pin varactor tuned oscillator. In the FM mode the direct oscillator fre-
quency is fed into the double balanced FM mixer, in the AM mode the divided by 4, 6, 8 or 10 oscillator fre-
quency is fed into the AM mixer.
The two separate symmetrical input stages of the IC, one optimized for FM-, the other for AM- mode allow
symmetrical and unsymmetrical prestage configuration.
The AM and FM input frequencies are converted to a fix 1st IF in the 10.7 MHz range. The FM-IF is post
amplified in a separate IF amplifier with DC adjustable gain, the AM-IF is fed directly to the 2nd mixer.
The TUA 4306 has been designed to work with a PLL in the 100MHz range in both modes or in the AM- mode
with the divided frequency.
Depending on the input signal strength, the integrated AGC stage for prestage control drives PIN-Diodes as
well as MOSFETs.
4.2FM-MODE
FM-IF Demodulator
The FM-IF amplifier includes a 7 stage capacitive coupled limiter amplifier with coincidence demodulator and
AF output. The AF output signal can be continuously attenuated to decrease the noise.
There is a field strength output (with min. 76 dB dynamic range, typ. ±1 dB nonlinearity and typ. ±3 dB temper-
ature drift) and a fixed muting (with full muting typ 80 dB).
A multipath detector with analog output is available. Its input signal is fed from the high pass filter of the
stereo-decoder/noiseblanker and a second 80 kHz 1-pole high pass filter.
4.3Stereodecoder
Power supply, reference current:
A temperature-stable, low noise reference voltage generator is used for better ripple rejection and to generate
a reference current. This current is used as a time base for the deemphasis, the gate time of the pulse former,
and the pilot cancellation, avoiding temperature and tolerance effects .
MPX input, MPX filter:
A 4-pole low-pass filter determines the bandwidth of the MPX signal.
Voltage Controlled Oscillator, Phase Detector:
The 456 kHz oscillator and the frequency dividers are used as walsh function generators (suppression of 3rd
order harmonics) for:
38 kHz for the stereo decoder
19 kHz inphase for phase detector and pilot cancellation
19 kHz quadrature for the phase detector.
The phase detector locks the on chip 19 kHz signal to the pilot tone in the MPX signal at 90 deg phase.
Pilot Detector, Pilot Indicator, Pilot Cancellation:
The voltage at the pilot detector output is proportional to the pilot tone input level. If that level is high enough,
the pilot indicator output is activated and the pilot cancellation turned on: a 19 kHz signal proportional to the
voltage at the pilot detector output is added to the MPX signal with inverse polarity, cancelling the 19 kHz pilot
tone.
Interference Detector , Noise Detector, Pulse Former:
The signal from the interference input (MPX or field strength signal) passes a 4-pole high-pass filter to the
nificant difference. The pulse former generates a gate pulse for the HCC block. During that pulse time the out-
puts of the deemphasis circuit are switched to hold mode.
4.4AM - MODE
In the AM mode the 1st IF is converted by the 2nd mixer into the 2nd IF in the 450 kHz range. Therefore a 2nd
LO force input is part of the IC. The 2nd IF signal passes an automatic gain controlled IF amplifier and is then
demodulated to the AF in a quasisynchronous demodulator. Switching to seek mode, the AGC time constant
is reduced by a factor of 5, the AM IF counter output is switched on and the AF is muted. The AGC voltage is
used as AM field strength and is fed to the combined field strength output.
Pin ConfigurationP-MQFP 64-1
Pin Description

Blockdiagram 1
Blockdiagram 2
Blockdiagram 3
Blockdiagram 4
Absolute Maximum RatingsThe AC / DCcharacteristic limits are not guaranteedhe maximal ratings may not be exceeded under any cir-
cumstances, not even momentary and individual, as permanent damage to the IC will result.
Ambient Temperature under bias: TA=-40 to +85°C

Partno	Mfg	Dc	Qty	Available	Descript
TUA4306	INFINEON	N/a	850	avai	One Chip car radio, AM/FM Receiver
TUA4306		N/a	31	avai	One Chip car radio, AM/FM Receiver