Functional description, 1 fm quadrature mixer, 2 quadrature oscillator – Philips TEA5880TS User Manual
Page 7: 3 selectivity, 4 demodulator, 6 if counter, 7 mute, Tea5880ts, Philips semiconductors
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© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 02 — 26 April 2004
7 of 27
Philips Semiconductors
TEA5880TS
Integrated FM stereo radio IC for host processor tuning
7.
Functional description
7.1 FM quadrature mixer
The FM quadrature mixer converts FM RF (76 MHz to 108 MHz) to an IF of 110 kHz. The
FM quadrature mixer provides inherent image rejection.
7.2 Quadrature oscillator
The internally tuned LC VCO provides the Local Oscillator (LO) signal for the FM
quadrature mixer. The VCO frequency range is 150 MHz to 217 MHz.
7.3 Selectivity
Fully integrated I and Q channel IF filter.
7.4 Demodulator
The FM quadrature demodulator is an integrated PLL demodulator.
7.5 Level voltage generator and analog-to-digital converter
The level voltage is analog-to-digital converted with 3 bits and output via the data line.
7.6 IF counter
The IF counter outputs a 16-bit count result via the data line.
7.7 Mute
The digital interface controls the audio mute and output level.
Fig 3.
Pin configuration.
TEA5880TS
RFIN
GND
RFGND
n.c.
GND
n.c.
V
CCD
reserved
V
CCA
LL1
R/W
V
CC1
DATA
V
CC1
CLOCK
LR1
MPX
n.c.
AUDL
n.c.
AUDR
n.c.
LED
GND
001aaa667
1
2
3
4
5
6
7
8
9
10
11
12
14
13
16
15
18
17
20
19
22
21
24
23