INTEGRATED CIRCUITS
TDA1591
PLL stereo decoder and noise blanker
Product specification |
1996 Sep 02 |
Supersedes data of March 1992
File under Integrated Circuits, IC01
Philips Semiconductors |
Product specification |
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PLL stereo decoder and noise blanker |
TDA1591 |
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FEATURES
∙Adjustment-free voltage controlled PLL oscillator for ceramic resonator (f = 456 kHz)
∙Pilot signal dependent mono/stereo switching
∙Analog control of mono/stereo change over [stereo blend, Stereo Noise Controller (SNC)]
∙Adjacent channel noise suppression (114 kHz)
∙Pilot canceller
∙Analog control of de-emphasis; High Cut Control (HCC)
∙Applicable as source selector for AM/FM/cassette switching
∙Separate interference noise detector
∙Integrated input low-pass filter for delayed noise blanking
∙Noise blanking at MPX-demodulator outputs
∙Internal voltage stabilization.
QUICK REFERENCE DATA
GENERAL DESCRIPTION
The TDA1591 is a monolithic bipolar integrated circuit providing the stereo decoder function and noise blanking for FM car radio applications.
The device operates in a power supply range of 7.5 to 12 V.
SYMBOL |
PARAMETER |
MIN. |
TYP. |
MAX. |
UNIT |
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VP |
supply voltage (pin 5) |
7.5 |
10 |
12 |
V |
IP |
supply current |
− |
12 |
− |
mA |
Vo(rms) |
audio output signal (RMS value) |
− |
900 |
− |
mV |
THD |
total harmonic distortion |
− |
0.1 |
0.3 |
% |
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S/N |
signal-to-noise ratio |
− |
76 |
− |
dB |
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αcs |
channel separation |
− |
40 |
− |
dB |
Vtrigg |
interference voltage trigger level |
− |
10 |
− |
mV |
ORDERING INFORMATION
TYPE |
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PACKAGE |
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NUMBER |
NAME |
DESCRIPTION |
VERSION |
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TDA1591 |
DIP20 |
plastic dual in-line package; 20 leads (300 mil) |
SOT146-1 |
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TDA1591T |
SO20 |
plastic small outline package; 20 leads; body width 7.5 mm |
SOT163-1 |
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1996 Sep 02 |
2 |
02 Sep 1996
3
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from IF level detector |
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stereo |
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SNC |
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HCC |
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indication |
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IDENT |
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100 kΩ |
100 kΩ |
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from pin 5 |
V = 1 to 5 V |
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0.22 |
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ref |
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27 kΩ |
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F |
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ViAUX |
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forced |
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12 kΩ |
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R1 |
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mono |
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10 kΩ |
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47 kΩ |
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27 kΩ |
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R2 |
0.22 F |
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0.1 |
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V i MPX 68 kΩ |
82 kΩ |
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470 kΩ |
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6.8 nF |
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F |
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6.8 nF |
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47 kΩ |
VoR |
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PILOT |
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FB-R |
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0.1 F |
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68 pF |
(1) |
20 |
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19 |
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18 |
17 |
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16 |
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15 |
14 |
13 |
12 |
11 |
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Ccomp |
75 kΩ |
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PILOT |
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SWITCH |
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STEREO |
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DETECTOR |
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BLEND |
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6.5 |
+ |
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+ |
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kΩ |
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7.4 kΩ |
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4-POLE |
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PILOT |
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2-POLE |
GATE |
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FILTER |
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FILTER |
AND |
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CANCEL |
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(80 kHz) |
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(30 kHz) |
HCC |
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38 kHz |
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7.4 kΩ |
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19 kHz |
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TDA1591 |
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PHASE |
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LOGIC |
INTERFERENCE |
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PULSE |
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DETECTOR |
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DETECTOR |
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FORMER |
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6.5 kΩ |
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VOLTAGE |
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REFERENCE |
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+ |
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NOISE |
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+ |
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VCO |
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STABILIZER |
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CURRENT |
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DETECTOR |
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1 |
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4 |
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5 |
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7 |
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10 |
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27 kΩ |
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470 |
47 |
FB-L |
47 kΩ |
VoL |
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0.1 |
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470 |
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2.2 |
pF |
nF |
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R3 |
0.22 F |
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0.22 |
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22 |
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100 kΩ |
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pF |
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kΩ |
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47 kΩ |
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CSB456F11 |
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F |
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F |
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nF |
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0.22 F |
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(Murata) |
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ViAUX |
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VP = 10 V |
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10 Ω |
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1.2 |
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100 |
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mute on |
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pagewidth |
nF |
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VCO off |
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MEH027 |
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INFI |
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interference signal (TDA1596, pin 3) |
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F |
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full |
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(1) Simulates the roll-off of the FM demodulator. |
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handbook, |
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Fig.1 Block diagram with external components, also used as test circuit.
DIAGRAM BLOCK
blanker noise and decoder stereo PLL
TDA1591
Semiconductors Philips
specification Product
Philips Semiconductors |
Product specification |
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PLL stereo decoder and noise blanker |
TDA1591 |
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PINNING
SYMBOL |
PIN |
DESCRIPTION |
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PLL |
1 |
phase locked loop filter |
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OSC |
2 |
oscillator input/output pin for |
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ceramic resonator |
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GND |
3 |
ground (0 V) |
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Iref |
4 |
reference current |
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VP |
5 |
supply voltage (+10 V) |
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INFI |
6 |
interference signal input |
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handbook, halfpage |
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PUFO |
7 |
pulse former time constant; |
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VCO off |
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NDET |
8 |
noise detector time constant; |
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mute on |
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FB-L |
9 |
AF feedback input for left audio |
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signal |
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VoL |
10 |
AF output signal left |
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VoR |
11 |
AF output signal right |
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FB-R |
12 |
AF feedback input for right audio |
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signal |
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CDEEL |
13 |
de-emphasis capacitor for left |
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channel |
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CDEER |
14 |
de-emphasis capacitor for right |
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channel |
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HCC |
15 |
HCC input for de-emphasis control |
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SNC |
16 |
stereo blend input |
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Vref |
17 |
externally applied reference |
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voltage of 1 to 5 V |
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IDENT |
18 |
identification output (HIGH = pilot |
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existing; stereo) |
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PILOT |
19 |
pilot detector level (forced mono |
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input) |
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Vi MPX |
20 |
MPX input signal from IF |
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demodulator |
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Vi MPX |
PLL |
1 |
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20 |
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OSC |
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2 |
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19 |
PILOT |
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GND |
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3 |
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18 |
IDENT |
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Iref |
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Vref |
4 |
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17 |
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VP |
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SNC |
5 |
TDA1591 |
16 |
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INFI |
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HCC |
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6 |
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15 |
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CDEER |
PUFO |
7 |
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14 |
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CDEEL |
NDET |
8 |
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13 |
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FB-L |
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FB-R |
9 |
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12 |
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VoL |
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VoR |
10 |
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11 |
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MHA363 |
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Fig.2 Pin configuration.
1996 Sep 02 |
4 |
Philips Semiconductors |
Product specification |
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PLL stereo decoder and noise blanker |
TDA1591 |
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FUNCTIONAL DESCRIPTION
Adapting the MPX input to the level of the FM demodulator output is realized by the value of input resistor R1
(see Fig.3). The total gain of the stereo decoder is applicable by varying the feedback resistors R2 and R3 (see Figs 1 and 4).
In mute position and the VCO switched off (pin 7), the output amplifiers can be used for cassette playback, AM stereo purpose or other signal sources.
The Stereo Noise Controller (SNC) provides a smooth mono to stereo take-over (see Fig.5).
LIMITING VALUES
For High Cut Control (HCC), the de-emphasis time constant can be changed to higher values
(see Figs 7 and 8). This function is controlled by an analog input signal.
The noise blanking facility is achieved by gating the stereo decoder output signal.
The interference detector generates a gating pulse preferable forced by the level detector voltage of the IF part.
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL |
PARAMETER |
MIN. |
MAX. |
UNIT |
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VP |
supply voltage (pin 5) |
0 |
13.2 |
V |
Ptot |
total power dissipation |
0 |
0.25 |
W |
Tstg |
storage temperature |
−55 |
+150 |
°C |
Tamb |
operating ambient temperature |
−40 |
+85 |
°C |
Ves |
electrostatic handling; note 1 |
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pins 1 and 16 |
−400 |
+400 |
V |
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pin 5 |
−300 |
+300 |
V |
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all other pins |
−600 |
+600 |
V |
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Note
1. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor.
1996 Sep 02 |
5 |
Philips Semiconductors |
Product specification |
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PLL stereo decoder and noise blanker |
TDA1591 |
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CHARACTERISTICS
VP = 10 V; Tamb = 25 °C; input signal Vi MPX(p-p) = 1.7 V; m = 100% ( f = ±75 kHz, fmod = 1 kHz); de-emphasis of 50 μs and series resistor at input R1 = 150 kΩ; measurements taken in Fig.1; unless otherwise specified.
SYMBOL |
PARAMETER |
CONDITIONS |
MIN. |
TYP. |
MAX. |
UNIT |
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Supply |
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VP |
supply voltage (pin 5) |
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7.5 |
10 |
12 |
V |
IP |
supply current |
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− |
12 |
− |
mA |
Stereo decoder |
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Vi MPX(p-p) |
MPX input signal on pin 20 |
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− |
1.7 |
− |
V |
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(peak-to-peak value) |
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Vi MPX(p-p) |
overdrive margin of MPX input signal |
THD = 1% |
3 |
− |
− |
dB |
Vo(rms) |
AF mono output signal at pins 10 and 11 |
without pilot |
− |
900 |
− |
mV |
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(RMS value) |
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Vo |
overdrive margin of output signal |
THD = 1% |
3 |
− |
− |
dB |
V10-11/Vo |
difference of output voltage levels |
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− |
− |
1 |
dB |
Vo 10,11 |
DC output voltage (pins 10 and 11) |
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3.3 |
3.8 |
4.3 |
V |
Ro 10,11 |
output resistance |
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− |
130 |
− |
Ω |
αcs |
channel separation |
pin 16 open-circuit; |
− |
40 |
− |
dB |
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see Fig.6 |
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THD |
total harmonic distortion |
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− |
0.1 |
0.3 |
% |
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S/N |
signal-to-noise ratio |
f = 20 to 16000 Hz |
− |
76 |
− |
dB |
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α19 |
pilot signal suppression |
f = 19 kHz |
− |
50 |
− |
dB |
α38 |
subcarrier suppression |
f = 38 kHz |
− |
50 |
− |
dB |
α57 |
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f = 57 kHz |
− |
46 |
− |
dB |
α76 |
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f = 76 kHz |
− |
60 |
− |
dB |
IM2 |
intermodulation for fspur = 1 kHz |
fmod = 10 kHz; note 1 |
− |
60 |
− |
dB |
IM3 |
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fmod = 13 kHz; note 1 |
− |
58 |
− |
dB |
α57ARI |
traffic radio (ARI) |
f = 57 kHz; note 2 |
− |
70 |
− |
dB |
α67 |
Subsidiary Communication Authorization |
f = 67 kHz; note 3 |
70 |
− |
− |
dB |
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(SCA) |
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α114 |
Adjacent Channel Interference (ACI) |
f = 114 kHz; note 4 |
− |
80 |
− |
dB |
α190 |
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f = 190 kHz; note 4 |
− |
70 |
− |
dB |
PSRR |
power supply ripple rejection |
f = 100 Hz; |
− |
35 |
− |
dB |
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Vripple(rms) = 100 mV |
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VCO (pin 2) |
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fosc |
oscillator frequency (ceramic resonator) |
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− |
456 |
− |
kHz |
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frequency range of free running oscillator |
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452 |
− |
460 |
kHz |
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f/f |
capture and holding range |
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− |
1 |
− |
% |
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|
V7 |
VCO-off voltage (pin 7) |
|
0 |
− |
0.6 |
V |
1996 Sep 02 |
6 |