TIME MULTIPLEX STEREO DECODER TDA1578A stereo decoder based time-

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TIME MULTIPLEX STEREO DECODER TDA1578A stereo decoder based time-

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TDA1578A
TIME MULTIPLEX STEREO DECODER
TDA1578A stereo decoder based time-division multiplex principle. Features
adjustable input output voltage levels
automatic mono/stereo switching with hysteresis, controlled both pilot signal field strength level
analogue control mono/stereo change over
pilot indicator driver
analogue muting control
muting indicator driver
oscillator with decoupled frequency measurement output
electronic smoothing supply voltage
QUICK REFERENCE DATA
Measured with frequency deviation without pilot;
Supply voltage (pin V8.7 typ.
Supply current (pin typ.
Multiplex input signal (adjustable) vMUX(p-p) typ.
Input resistance (adjustable) typ.
A.F. output voltage typ. 0,75
Output resistance iow-ohmic
Spread gain
Channel separation typ.
Total harmonic distortion
Signal-to-noise ratio typ.
Carrier harmonic suppression
pilot signal; f=19kHz typ.
subcarrier; 38kHz typ.
typ.
typ.
traffic radio (V.W.F.) "57(VWF) typ.
(Subsidiary Communications
Authorization) typ.
(Adjacent Channel
Interference); "114 typ.
intermodulation; 10/13 "2-"3 typ.
Supply voltage range (pin Operating ambient temperature range
PACKAGE OUTLINE
18-lead DIL; plastic (SOT102).
D0A171E
V8.7 Tamb
October 1983
1595
This Material Copyrighted Respective Manufacturer
TDA1578A
1596
October 1983
711062ti 0031713
This Material Copyrighted Respective Manufacturer
Time multiplex stereo decoder
TDA1578A
RATINGS
Limiting values accordance with Absolute Maximum System 134) Supply voltage (pin Input voltages (pins Indicator driver output voltage Indicator driver output current Total power dissipation Storage temperature range Operating ambient temperature range
v8.7 max.
v3;4;5-7
V1,2-1 max.
h;'2 max.
ptot max.
Tstg
^amb
THERMAL RESISTANCE
From crystal ambient
0001714
October 1983 1597
This Material Copyrighted Respective Manufacturer
TDA1578A
CHARACTERISTICS (measured Fig.
Input signal: 100% kHz); pilot signal: 6,75 kHz); modulation frequency: kHz; V3_5 V4.5
de-emphasizing time: jis; oscillator adjusted fosc pilot voltage T"amb unless otherwise specified
parameter symbol min. typ. max. unit
Supply voltage range (pin
Supply current (except
output indicator)
Nominal multiplex input
voltage (peak-to-peak value) vMUX(p-p)
vMUX(p-p)
Overdrive reserve input
=0,3%
A.F. output voltage (r.m.s.
value; mono without pilot)
R15-18= R16-17 15ki2 vo(rms) 0,75
vo(rms)
R16-17 left Vo(rms)
Vo(rms)
Overdrive reserve output
R15-18=
Spread output voltage
levels AV0/V0
Difference output voltage
levels AVi5.16/V0
Output resistance low-ohmic
Available output current
pins
Modulation range output
(unloaded) v15;16-7 V9.7-I
Internal current limiting
D.C. output voltage V15;16-7
R15-18 R16-17 v15;16-7
D.C. current ->17;18
(pins -'17;18
1598 October 1983 7H0B2b
This Material Copyrighted Respective Manufacturer
Time multiplex stereo decoder
TDA1578A
parameter symbol min. typ. max. unit
Channel separation
V4.5
Total harmonic distortion
0,04
Signal-to-noise ratio
Carrier harmonic
suppression output
pilot signal;
subcarrier;
intermodulation (note
kHz;
spurious signal
PLL-filter Fig.
PLL-filter Fig.
kHz;
spurious signal
traffic radio <V.W.F.);
(note a57(VWF)
(Subsidiary Communi-
cations Authorization);
(note
(Adjacent Channel
nterference) (note
Ripple rejection
output;
vP(rms) (pin RR100
Voltage filter capacitor
without external load V9-7
Source resistance
711GfiSb
October 1983 1599
This Material Copyrighted Respective Manufacturer
TDA1578A
CHARACTERISTICS (continued)
parameter symbol min. typ. max. unit
Mono/stereo control
Pilot threshold voltages
(peak-to-peak values)
stereo 'ON' vi(p-p)
vi(p-p)
mono 'ON' vi(p-p)
vi(p-p)
Switch hysteresis
ViON/ViOFF
Switching time
C-|4_7 0,22
stereo 'ON' tstON
mono 'ON' tmON
External mono/stereo control
(see Fig. note
Switching voltage V14-7
external mono control V14-7
v4.5
Control voltage channel
separation: -v4-5
-v4-5
AV4.5
-v4-5
-V4.5
Control voltage
mono 'ON' -v4-5
-v4-5
stereo 'ON' -v4-5
-v4-5
Control voltage difference
stereo 'ON' av4.7
1600 October 1983 711002b 0031717 bflE
This Material Copyrighted Respective Manufacturer
Time multiplex stereo decoder TDA1578A
parameter symbol min. typ. max. unit
Muting circuit
(see Fig. note
Control voltage
attenuation: -V3-5
-V3-5
AV3.5
-V3-5
-V3-5
Attenuation
with V3.5
with -V3.5
driver output current
attenuation:
Control voltage -V3-5
-V3-5
Control inputs
Recommended voltage range v3;4;5-7
Input bias current '3;4;5
Indicator driver
Output saturation voltages
V3.5 v1-7sat
v2-7sat
Output leakage current
atV1;2-7 '1;2
711002b
October 1983 1601
This Material Copyrighted Respective Manufacturer
TDA1578A
CHARACTERISTICS (continued)
parameter symbol min. typ. max. unit
Oscillator frequency
adjustable with Rio-7 fosc
Spread free-running
frequency nominal
external circuitry fosc
Free-running frequency
dependency (note
with temperature 10"4
with supply voltage Afosc/AVP
Capture holding range
pilot input voltage
Vpj| Vpj| Af/f
control slope (total) stot kHz/pis
D.C. voltage V10-7
Frequency measuring point;
internal switching threshold V4-7
9VBE
Output voltage (peak-to-peak
value) v4-7(p-p)
Output resistance R4.7
1602 October 1983
7110fl2t. 000171*1
This Material Copyrighted Respective Manufacturer
Time multiplex stereo decoder TDA1578A
Notes characteristics
Intermodulation suppression (BFC: Beat-Frequency Components)
vo(sianal) kHz) tt2=Vo,l;url) kHz)' kHz)
kHz)
vo(signal) kHz)
^o(spurious) kHz)
measured with: mono signal; kHz;9% pilot signal.
Traffic radio (V.W.F.) suppression
vo(signal> kHz)
vo(spurious) kHz)
measured with: stereo signal; kHz; pilot signal; traffic subcarrier kHz, 60%).
(Adjacent Channel Interference)
(sianal) kHz) a114 kHz)
Vo(spurious) kHz)
vo(siqnal) kHz)
a190 kHz)
vo(spurious) kHz)
measured with: mono signal; kHz;9% pilot signal; spurious signal kHz, unmodulated).
(Subsidiary Communications Authorization)
vo(siqnal) kHz)
vo(spurious) kHz)'
measured with: mono signal; kHz; pilot signal; SCA-subcarrier kHz, unmodulated).
Assuming 28,6
effects external components taken into account.
711002b
October 1983 1603
This Material Copyrighted Respective Manufacturer
TDA1578A
APPLICATION NOTES
When mono/stereo control muting control used, pins have grounded.
receiver, channel separation adjustment obtained
capacitor <Ci2-7>: phasing 19/38
filter input: frequency response compensation (w))
Feeding output signals output amplifier inputs other channel.
PLL-filter reduced intermodulation (o^hsee Fig.
External mono 'ON'switch; Fig.
Switching 'OFF' oscillator;see Fig.
Fig. PLL-filter (see also Fig.
Fig.
Fig. oscillator switched-off when: Id>100mA
1604 October 1983 7iiofl2b
This Material Copyrighted Respective Manufacturer
Time multiplex stereo decoder
r6<p-p] IfUA)
Vp(V)
Fig. Signal handling range input
~'17;18 (|UA)
Fig. D.C. current feedback loop output amplifier.
(kHz!
711002b 0001722
TDA1578A
(mA)
Fig. Supply current comsumption
V9-7
nom.
"elp-plt/uAl
Fig. Total harmonic distortion (THD) function peak-to-peak input current kHz; V3-5 V4-5
Fig. Total harmonic distortion (THD) function modulation frequency (fm); 15V;l6(p.p)=21,5 mono
-stereo; =-R; 91%+ pilot signal.
October 1983
1605
This Material Copyrighted Respective Manufacturer
TDA1578A
(kHz)
Fig. Channel separation function modulation frequency (fm); kii; V4.5
lyus]
rated
c12-7 Ci2-7(nF)
Fig. Phase shift between pilot signal input internal carrier processing function Ci2-7-
-20c
(8,5V)
Vi.-5(mV)
IdB)
Fig. Mono/stereo control kHz; channel separation.
1606 October 1983
711Dfl2b 00A1723 Tflb
This Material Copyrighted Respective Manufacturer
Time multiplex stereo decoder
V3_= ImVI -200 -100
(mAI
TDA1578A
V3_5 ImVI
-500 -400 -300 -200 -100
Fig. Muting (VQ) muting indicator current function V3.5.
curves;
curves VPL/Rbias1 (pin 1);-22
V/680
V/680
^olaf) IdBI
Fig. Muting indicator current; Vp[_
Rbiasl
-Rbiasl matched
711002b
October 1983 1607
This Material Copyrighted Respective Manufacturer
TDA1578A
TDA1576
10kfi
390kn
47nF
TDA1578
150kg 0,1/uF
0.22/jF
3.6kft
Fig. Application information external circuitry provide external mono/stereo muting control. Adjustment recommendations:
Vj(hf) with (channel separation), vi(hf) with VD(af) -3dB.
7Z84696.1
Fig. Typical application circuit using TDA1578A
1608
October
1983
711062b 0001725 75e!
This Material Copyrighted Respective Manufacturer

TIME MULTIPLEX STEREO DECODER TDA1578A stereo decoder based time-

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