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TUA4401K
FM-Car Radio IC with PLL
Wireless Components
FM Car Radio IC with PLL
TUA 4401K V 2.1
Specification 17.02.00
Edition 03.99
Published by Infineon Technologies AG i. Gr.,
SC,
Balanstraße 73,
81541 München
© InfineonTechnologiesAG i.Gr. 08.03.00.
All Rights Reserved.
Attention please!
As far as patents or other rights of third parties are concerned, liability is only assumed for components, not for applications, processes and circuits im-
plemented within components or assemblies.
The information describes the type of component and shall not be considered as assured characteristics.
Terms of delivery and rights to change design reserved.
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Critical components1 of the InfineonTechnologiesAG, may only be used in life-support devices or systems2 with the express written approval of the
InfineonTechnologiesAG.A critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the failure of that life-
support device or system, or to affect its safety or effectiveness of that device or system.2Life support devices or systems are intended (a) to be implanted in the human body, or (b) to support and/or maintain and sustain human life. If they
fail, it is reasonable to assume that the health of the user may be endangered.
Productinfo
Productinfo
General DescriptionThe TUA 4401K is the first Infineon
Carradio IC using BICMOS technol-
ogy.
The combination of an analog FM
receiver circuit and a digital PLL syn-
thesizer on the same chip reduces the
over all pin count in comparison to two
separate IC’s and in addition the
number of necessary external compo-
nents. This gives the flexibility both for
high performance and low cost appli-
cations.
The recommended applications for this
device are FM only carradios and back-
ground receivers, capable for all world
standards.
Features-Double balanced RF mixer with low
noise figure, high IP3 and wide
dynamic rangeStrictly symmetrical RF circuitryIF amplifier with adjustable gainDouble frequency 1st LO option7 stage limiter amplifier with dB
linear fieldstrength outputLow distortion coincidence
demodulatorMultipath detector with analog
outputCMOS PLL-SynthesizerResolution between 100 kHz and
6.25kHzSearch tuning stop with IF counter
and Fieldstrength/Multipath
evaluationADC’s for fieldstr. and multipath
detectorI2C Bus operation
Applications-FM only car radio receiver, back-
ground receiver
Ordering Information
Table of ContentsTable of Contents1-1Product Description2-12.1General Description2-2
2.2Applications2-3
2.3Features2-3
2.4Package Outlines2-4Functional Description3-1
3.1Pin Configuration3-2
3.2Block Diagram3-12
3.3Functional Block Diagram3-13
3.4Circuit Description3-14Applications4-1
4.1Application and Circuits4-2Reference5-1
5.1Electrical Data5-2
5.1.1Absolute Maximum Range5-2
5.1.2Operating Range5-2
5.1.3AC/DC Characteristics5-3
5.2Phase detector outputs5-7
5.3Bus Interface5-8
5.4I2C Bus Timing5-13
Product Description2.1General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.2Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
2.3Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
2.4Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Product Description
2.1General Description
The TUA 4401K is the first Infineon Carradio IC using BICMOS technology.
The combination of an analog FM receiver circuit and a digital PLL synthesizer
on the same chip reduces the over all pin count in comparison to two separate
IC’s and in addition the number of necessary external components. This gives
the flexibility both for high performance and low cost applications.
The recommended applications for this device are FM only carradios and back-
ground receivers, capable for all world standards.
TUA 4401K features:
FrontendHigh level, high impedance mixer input with improved dynamic rangeHigh input / output 3rd order intercept pointIntegrated prestage AGC generation and control for PIN diodes and MOS
tetrodeBus controlled AGC threshold2 pin 1st local oscillator with improved low phase noise, internally coupled to
PLL. Double frequency operation possibleStrictly symmetrical RF partsPLL with fast acquisition modeResolution 100 kHz, 50 kHz, 25 kHz, 12,5 kHz, 10 kHz and 6.25 kHzHigh running (61.5 MHz) crystal oscillator to avoid interference with bus
controlled adjustment
IF amplification, demodulation and STSLow noise IF amplifierGain adjust with DC control voltage or serial bus possible7 stage IF limiter with extended fieldstrength range suitable for the IF fre-
quency range of 10.7 MHz ... 21.4 MHzFieldstrength DC output and ADC output availableLow distortion coincidence demodulator (using short loop AFC principle)
with MPX outputWideband multipath detector with analog output and ADC outputIF counter for search tuning stop with selectable IF center frequency,
window width and programmable thresholds for fieldstrength and multipath
evaluationSTS informations -in window-,-below-,-beyond- available
Product Description2C BusI2C bus (2 wire, fast mode device with 400 kbit/s) operation possibleBus interface with low threshold voltage Schmitt Trigger inputs for interfac-
ing 3V or 5V microprocessors
2.2ApplicationsFM only car radio receiver, background receiver
2.3FeaturesDouble balanced RF mixer with low noise figure, high IP3 and wide dynamic
rangeStrictly symmetrical RF circuitryDouble frequency 1st LO optionIF amplifier with adjustable gain7 stage limiter amplifier with dB linear fieldstrength outputLow distortion coincidence demodulatorMultipath detector with analog outputCMOS PLL-SynthesizerResolution between 100 kHz and 6.25kHzSearch tuning stop with IF counter and
Fieldstrength/Multipath evaluationADC’s for fieldstr. and multipath detectorI2C Bus operation
Product Description
2.4Package Outlines
MQFP 44
Functional Description3.1Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3.2Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
3.3Functional Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
3.4Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Functional Description
3.1Pin Configuration
Pin_config.wmf
Figure 3-1IC Pin Configuration
Functional Description
Functional Description
Functional Description
Functional Description
Functional Description
Functional Description
Functional Description
Functional Description
Functional Description
Functional Description
3.2Block Diagram
Funct_block.wmf
Figure 3-2Main Block Diagram
Functional Description
3.3Functional Block Diagram
Funct_block.wmf
Figure 3-3Functional Block Diagram

Partno	Mfg	Dc	Qty	Available	Descript
TUA4401K	INFINEON	N/a	2700	avai	FM-Car Radio IC with PLL