Philips Semiconductors
Product specification
Multistandard dual carrier stereo sound decoder
FEATURES
•
Low power consumption
•
Alignment-free multistandard FM sound demodulation
•
No external intercarrier sound band-pass filters required
•
Auto mute switchable via I
2
C-bus
•
Multistandard A2 stereo sound decoder
•
No adjustment for reduced channel separation
requirement
•
De-emphasis time constant related to standard
•
Very reliable digital identification of sound transmission
mode via I
2
C-bus, alignment-free
•
No external filter for pilot input required
•
I
2
C-bus transceiver with MAD (Module ADdress)
•
I
2
C-bus control for all functions
•
Stabilizer circuit for ripple rejection and constant output
level
•
Additional mono output
•
Pin aligned with TDA9874AH
•
ESD protection on all pins.
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
TDA9873H
TDA9873HS
QFP44
QFP44
DESCRIPTION
plastic quad flat package; 44 leads (lead length 2.35 mm);
body 14
×
14
×
2.2 mm
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10
×
10
×
1.75 mm
GENERAL DESCRIPTION
TDA9873H
The TDA9873H is an economic multistandard dual
FM demodulator and analog carrier stereo decoder with
I
2
C-bus control.
VERSION
SOT205-1
SOT307-2
2000 Apr 04
2
Philips Semiconductors
Product specification
Multistandard dual carrier stereo sound decoder
TDA9873H
QUICK REFERENCE DATA
V
CC
= 5 V; T
amb
= 25
°C;
B/G standard (f
SC1
= 5.5 MHz, f
SC2
= 5.742 MHz, SC1/SC2 = 7 dB,
∆f
AF
= 27 kHz,
f
mod
= 1 kHz, L = R, stereo mode); input level for first sound carrier V
i(FM)(rms)
= 50 mV; f
ref
= 4.000 MHz; measured in
application circuits of Figs 7 and 8; unless otherwise specified.
SYMBOL
V
CC
I
CC
V
o(rms)
V
o(cl)(rms)
f
i(FM)
PARAMETER
supply voltage
supply current
AF output level (RMS value)
AF output clipping level
(RMS value)
FM-PLL operating frequencies
(switchable)
CONDITIONS
MIN.
4.5
40
400
1400
TYP.
5
60
500
−
MAX.
6.6
75
600
−
UNIT
V
mA
mV
mV
54% modulation; note 1
THD < 1.5%
S/N
W
t
ident(on)
V
i(FM)(rms)
α
cs(AF)(stereo)
α
ct(AF)(dual)
Notes
first sound carrier
M standard
B/G standard
I standard
D/K standard
second sound carrier
M standard
B/G standard
D/K (1) standard
D/K (2) standard
D/K (3) standard
weighted signal-to-noise ratio
CCIR 468-4 weighted; quasi
(complete signal path)
peak; dual mode;
B/G standard; note 1
total identification time on for
normal mode; note 2
identification mode change
fast mode; note 2
FM-PLL input voltage (RMS value) sensitivity for pull-in
first sound carrier
second sound carrier
AF channel separation (stereo
B/G standard; note 3
mode; complete signal path)
without alignment
I
2
C-bus alignment
AF crosstalk attenuation (dual
mode; complete signal path)
−
−
−
−
−
−
−
−
−
52
4.5
5.5
6.0
6.5
4.72
5.74
6.26
6.74
5.74
56
−
−
−
−
−
−
−
−
−
−
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
dB
0.35
0.1
−
−
25
40
65
−
−
−
−
30
45
70
2
0.5
6
1
−
−
−
s
s
mV
mV
dB
dB
dB
1. Condition for B/G, I and D/K standard: V
CC
= 5 V and
∆f
= 27 kHz (m = 54%). Condition for M standard: V
CC
= 5 V
and
∆f
= 13.5 kHz; 6 dB gain added internally to compensate smaller deviation.
2. The maximum total system identification time ‘on’ for a channel change is equal to maximum value of t
ident(on)
plus
t
I2C(read-out)
. The maximum total system identification time ‘off’ for a channel change is equal to maximum value of
t
ident(off)
plus t
I2C(read-out)
. The fast mode is proposed mainly during search tuning, program or channel select. If the
channel is selected, the identification response should be switched to normal mode for improved reliability. However
due to the transition from fast to normal mode, the identification bits are not valid for one integrator period. Therefore
the transmitter mode detected during the fast mode has to be stored before changing to normal mode. The storage
has to be kept for two seconds (maximum value of t
ident(on)
in the normal mode) from the moment of transition.
The identification can now operate in the normal mode until the next tuning action.
3. R modulated and L monitored.
2000 Apr 04
3
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ndbook, full pagewidth
2000 Apr 04
loop filter
LF1
14
FM DEMODULATOR
NARROW-BAND PLL
SC1
AF
AMPLIFIER
1
AF1O AF2O
10
32
IF
intercarrier
input
IFINT 25
4.5, 5.5, 6.0, 6.5
4.72, 5.74, 6.26,
6.74 MHz
n.c.
4, 5, 9, 11, 12,
16, 17, 19, 20,
22, 23, 36, 44
FM DEMODULATOR
NARROW-BAND PLL
SC2
18
LF2
13
AFR
AF
AMPLIFIER
2
26
CAF2
24
CAF1
BLOCK DIAGRAM
Philips Semiconductors
Multistandard dual carrier stereo sound decoder
external AF
mono
M
R
stereo
L
AF2I
33
AF1I
8
CDE1
3
CDE2
6
EXTM
38
EXTR
39
EXTL
40
1 OUTL
2 OUTR
43 OUTM
41 Vref
STEREO DECODER
STEREO ADJUST
B/G, D/K, I, M (Korea)
STANDARD
AF SWITCH
TDA9873H
POWER
SUPPLY
7 AGND
28 VCC
4
DIGITAL
ACQUISITION
OSCILLATOR
CLOCK
15
XTAL
4 MHz
pilot
loop
DIGITAL
IDENTIFICATION
PILOT
NARROW-BAND PLL
31
LPF
35
CID
34
CTRIG
27 DGND
I
2
C-BUS
TRANSCEIVER
21 MAD
30
SDA
29
SCL
37
P1
42
P2
MHB429
loop filter
Product specification
TDA9873H
Fig.1 Block diagram.
Philips Semiconductors
Product specification
Multistandard dual carrier stereo sound decoder
PINNING
SYMBOL
OUTL
OUTR
CDE1
n.c.
n.c.
CDE2
AGND
AF1I
n.c.
AF1O
n.c.
n.c.
AFR
LF1
XTAL
n.c.
n.c.
LF2
n.c.
n.c.
MAD
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
DESCRIPTION
left audio output
right audio output
de-emphasis 1 capacitor
not connected
not connected
de-emphasis 2 capacitor
analog ground
audio 1 input
not connected
audio 1 output
not connected
not connected
AF1 and AF2 signal return
loop filter 1
4 MHz reference input
not connected
not connected
loop filter 2
not connected
not connected
programmable address bit
(module address)
TDA9873H
SYMBOL
n.c.
n.c.
CAF1
IFINT
CAF2
DGND
V
CC
SCL
SDA
LPF
AF2O
AF2I
CTRIG
CID
n.c.
P1
EXTM
EXTR
EXTL
V
ref
P2
OUTM
n.c.
PIN
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
DESCRIPTION
not connected
not connected
audio 1 (AF1) capacitor
IF intercarrier input
audio 2 (AF2) capacitor
digital ground
supply voltage (+5 V)
serial clock input (I
2
C-bus)
serial data input/output (I
2
C-bus)
pilot loop filter
audio 2 output
audio 2 input
trigger capacitor
identification capacitor
not connected
output port 1
external audio input mono
external audio input right
external audio input left
reference voltage (
1
⁄
2
V
CC
)
output port 2
mono output
not connected
2000 Apr 04
5
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