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PDF TDA4360X Data sheet ( Hoja de datos )
| Número de pieza | TDA4360X | |
| Descripción | Dual Conversion AM Receiver | |
| Fabricantes | Siemens Semiconductor | |
| Logotipo |  |
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Dual Conversion AM Receiver
TDA 4360X
1 Overview
1.1 Features
• High flexibility with an external preamplifier stage
• Sym. or asym. mixer input
• 2-pin oscillator for the 1. LO
• 1. LO with LC tank circuit
• 1. LO at 100 MHz range
• Low narrow band noise
P-DSO-28-1
• Divider for 1. LO by 10 for the 100 kHz … 2 MHz range
and by 8 for the 2 MHz … 6 MHz range
• Integrated AGC generation
• Strictly symmetrical RF path
• Decoupled counter output
• 2. LO with quartz or external source
• Output for gain controlled 2. IF
• Switchable AGC time constant
Type
TDA 4360X
Ordering Code
Q67000-A5181
Package
P-DSO-28-1
1.2 Application
The TDA 4360X is an integrated dual conversion AM receiver for use in car radios.
The input signal passes a linear mixer for conversion into the 1. IF (~ 10 MHz). Via an
external bandpass filter (CER filter, quartz filter) the 1. IF is converted in a second linear
mixer to the 2. IF (~ 460 kHz).
After an external narrowband selectivity (CER filter) the 2. IF passes an automatic gain
controlled (AGC) amplifier and is then demodulated to the AF. The AGC time constant
can be switched with a ratio of 20.
For counter controlled search tuning stop (STS) the frequencies of the 1. LO and the
2. IF are available.
Semiconductor Group
1
04.96
1 page  
TDA 4360X
2 Circuit Description
The integrated circuit includes an 2-pin oscillator (1. LO) with sym. input, buffered output
and a double balanced mixer with sym. input. These stages convert the AM input signal
to a 1. IF which is much higher (~ 10 MHz) than the input frequencies. The 1. LO
operates as a LC varactor oscillator in the same 100 MHz range like the FM tuner
oscillator (e.g. TUA 4310X). So the same peripheral elements can be used.
Depending on the signal strength the prestage AGC controls MOSFET prestage
amplifiers.
The 1. IF passes an external selectivity and is then converted in a sym. double balanced
mixer to the 2. IF.
The 2. LO operates as a quartz controlled oscillator or as an amplifier for an external
signal.
The 2. IF signal passes an automatic gain controlled (AGC) IF amplifier and is then
demodulated to the AF in a quasi-synchronous demodulator. The AGC time constant
can be switched with a ratio of 20.
For fine tuning the decoupled 2. IF frequency is available.
The TDA 4360X is prepared to work with a PLL in the 100 MHz range. When applied
with a standard AM-PLL the oscillator frequency divided by 8 or 10 has to be used. In
this case a higher phase noise is to be expected.
Semiconductor Group
5
04.96
5 Page 
TDA 4360X
Figure 4
Application Circuit
Semiconductor Group
11
04.96
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TDA4360X.PDF ] | |
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