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PDF TUA4306 Data sheet ( Hoja de datos )
| Número de pieza | TUA4306 | |
| Descripción | 1-Chip Car Radio | |
| Fabricantes | Siemens Semiconductor Group | |
| Logotipo |  |
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ICs for Communications
1-Chip Car Radio
TUA 4306
Specification 16.3.99
1 page  
Specification
TUA 4306
1 Features
1.1 AM/FM-Receiver
• High flexibility with an external preamplifier stage for AM and FM
• Strictly symmetrical RF parts
• Separate mixers for AM and FM mode
• Sym. or asym. mixer inputs
• Only one 2-pin-oscillator for the 1st LO; in AM mode the oscillator frequency is divided
• 1st LO with LC-tank circuit
• 1st LO at 100 MHz range
• 1st LO decoupled counter output
• 1st LO decoupled divided counter output
• Improved low phase noise
• FM/AM field strength output combined
1.2 FM-Mode
1.2.1 FM-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 MOSFETs
• High level mixer input
• High input/output 3rd order interceptpoint
1.2.2 FM-IF Demodulator
The FM-IF-demodulator has been developed especially for car radio applications.
• 7stage limiter amplifier
• Coincidence demodulator
• Field strength output (combined with AM)
• Fixed mute depth (with full muting typ 80dB)
• Multipath detector with analog output
Semiconductor Group
2
16.3.99
5 Page 
Specification
TUA 4306
6 Pin Description
Pin
No.
Symbol
Function
1 MP det in Auxiliary multipath detector input (in parallel to internal connection)
2 MP det cap Multipath detector rectifier capacitor
3 MP det out Analog multipath detector output
4 AM seek m AM seek mode switch; AM IF counter on, AM-AGC fast and AF-mute
5 AM IF count AM-IF counter output for search tuning
6 GND IF
Ground IF
7 FM IF bias FM limiter input bias decoupling capacitor
8 FM IF in FM limiter input
9 AM IF bias AM AGC amplifier bias decoupling capacitor
10 AM IF in AM AGC amplifier input
11 AM IF bias AM AGC amplifier bias decoupling capacitor
12 2nd mix out 2nd AM mixer output (open collector)
13 2nd mix out 2nd AM mixer output (open collector)
14 AM IF cap AM AGC amplifier time constant capacitor
15 2nd LO
Frequency force input for 2nd mixer
16 2nd mix in 2nd AM mixer bias decoupling capacitor
17 2nd mix in 2nd AM mixer input
18 IF gain cap 10.7 MHz FM IF amplifier gain adjust blocking capacitor
19 IF amp out 10.7 MHz FM IFamplifier output
20 V pre AM AM prestage AGC buffered voltage output
21 I pre FM FM prestage AGC current output for PIN diode
22 IF gain adj 10.7 MHz FM IF amplifier DC controlled gain adjust
23 IF amp bias 10.7 MHz FM IF amplifier operation point
24 IF amp in 10.7 MHz FM IF amplifier input
25 +V rf
Supply voltage RF section
26 GND rf
Ground RF section
27 SEL A
AM divided counter ratio select A
28 SEL B
AM divided counter ratio select B
29 1st mix out 1st mixer output (open collector)
30 1st mix out 1st mixer output (open collector
31 Pre cap AM AM prestage AGC time constant capacitor
32 Pre cap FM FM prestage AGC time constant capacitor; output for MOS FET Gate 2
33 RF in FM FM 1st mixer symmetrical inputs
Semiconductor Group
8
16.3.99
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TUA4306.PDF ] | |
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