TEA5764HN Просмотр технического описания (PDF) - Philips Electronics
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TEA5764HN Datasheet PDF : 64 Pages
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Philips Semiconductors
TEA5764HN
FM radio + RDS
Table 3: Pin description …continued
Symbol
Pin
Description
n.c.
17
not connected
INTCON2
18
internally connected; leave open
GNDD
19
digital ground
INTX
20
interrupt flag output
n.c.
21
not connected
INTCON1
22
internally connected; leave open
TMUTE
23
soft mute time-constant capacitor
VAFR
24
right audio output
VAFL
25
left audio output
MPXOUT
26
FM demodulator MPX output
MPXIN
27
MPX decoder and RDS decoder MPX input
GNDD
28
digital ground; this pin has an internal pull-down resistor of 10 kΩ to
ground
n.c.
29
not connected
GNDA
30
analog ground
n.c.
31
not connected
FREQIN
32
32.768 kHz reference frequency input
XTAL
33
crystal oscillator input
VCCA
CD3
RFIN1
34
analog supply voltage
35
VCCA decoupling capacitor
36
RF input 1
RFIN2
37
RF input 2
GNDRF
38
RF ground
CAGC
39
RF AGC time-constant capacitor
n.c.
40
not connected
8. Functional description
8.1 Low noise RF amplifier
The LNA input impedance together with the LC RF input circuit defines an FM band filter.
The gain of the LNA is controlled by the RF AGC circuit.
8.2 FM I/Q mixer
FM quadrature mixer converts FM RF (76 MHz to 108 MHz) to IF.
8.3 VCO
The varactor tuned LC VCO provides the Local Oscillator (LO) signal for the FM
quadrature mixer. The VCO frequency range is 150 MHz to 217 MHz.
TEA5764HN_2
Product data sheet
Rev. 02 — 9 August 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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