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INTEGRATED CIRCUITS
TDA1593
IF amplifier/demodulator for
FM car radio receivers
Product specification |
1996 Oct 10 |
Supersedes data of 1995 May 29
File under Integrated Circuits, IC01
Philips Semiconductors |
Product specification |
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IF amplifier/demodulator for
TDA1593
FM car radio receivers
FEATURES
∙Balanced limiting amplifier
∙Balanced coincidence demodulator
∙Two open-collector stop pulse outputs for microcomputer tuning control
∙Simulated behaviour of ratio detector (internal field strength and detuning dependent voltage for dynamic AF signal muting)
∙Mono/stereo blend field strength indication control voltage
∙AFC output
∙Internal compensation of AF signal total harmonic distortion (THD)
∙Built-in hum and ripple rejection circuits.
GENERAL DESCRIPTION
The TDA1593 provides IF amplification, symmetrical quadrature demodulation and level detection for quality FM car radio receivers and is suitable for mono and stereo reception. It may also be applied to common front ends, stereo decoders and AM receivers circuits.
All pin numbers mentioned in this data sheet refer to the SO-version (TDA1593T) unless otherwise specified.
QUICK REFERENCE DATA
SYMBOL |
PARAMETER |
MIN. |
TYP. |
MAX. |
UNIT |
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VP |
supply voltage (pin 1) |
7.5 |
8.5 |
12 |
V |
IP |
supply current (l2 = 0) |
− |
20 |
26 |
mA |
ViIF |
IF input sensitivity for limiting on pin 20 (RMS value) |
14 |
22 |
35 |
μV |
VoAF |
AF output signal on pin 4 (RMS value) |
180 |
200 |
220 |
mV |
S/N |
signal-to-noise ratio (fm = 400 Hz; f = ±75 kHz) |
− |
82 |
− |
dB |
THD |
total harmonic distortion (fm = 1 kHz; f = ±75 kHz) |
− |
0.2 |
0.6 |
% |
Tamb |
operating ambient temperature |
−40 |
− |
+85 |
°C |
ORDERING INFORMATION
TYPE |
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PACKAGE |
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NUMBER |
NAME |
DESCRIPTION |
VERSION |
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TDA1593 |
DIP18 |
plastic dual in-line package; 18 leads (300 mil) |
SOT102-1 |
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TDA1593T |
SO20 |
plastic small outline package; 20 leads; body width 7.5 mm |
SOT163-1 |
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1996 Oct 10 |
2 |
10 Oct 1996 |
SFE |
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330 Ω |
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STOP |
0 |
STOP |
1 |
DIAGRAMBLOCK |
receiversradiocar FM |
amplifier/demodulatorIF |
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FM-IF |
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25 kΩ |
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Vref |
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input |
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22 nF |
22 nF |
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(1) |
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47 nF |
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25 kΩ |
5 V |
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ViIF |
LFB2 |
LFB1 |
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GND |
TSW |
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MUTE |
ST0 |
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ST1 |
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20 |
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19 |
18 |
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17 |
13 |
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16 |
15 |
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14 |
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25 kΩ |
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Vint |
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12 |
n.c. |
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LEVEL |
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for |
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DETECTOR |
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Vint |
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9 pF |
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11 |
DEMI2 |
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100 |
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25 |
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pF |
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kΩ |
V |
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Vint |
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3.3 |
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int |
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LP |
HP |
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DETUNE |
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kΩ |
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FILTER |
FILTER |
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DETECTOR |
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LIMITING |
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1 MHz |
50 kHz |
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3 |
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Vint |
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AMPLIFIER |
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QUADRATURE |
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40 kΩ |
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DEMODULATOR |
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40 |
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25 kΩ |
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10 |
DEMI1 |
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VOLTAGE |
kΩ |
9 pF |
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Voffset |
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Q L=19 |
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STABILIZER |
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Vref |
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TDA1593T |
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9 |
n.c. |
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THD |
MUTE |
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COMPENSATION |
ATTENUATOR |
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x2 |
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7.5 kΩ |
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Vref |
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1 |
2 |
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4 |
5 |
6 |
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8 |
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Vp ( |
8.5 V) |
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Vref |
LVA |
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ULV |
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VoAF |
Vref |
WLV |
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n.c. |
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DDV |
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100 nF |
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unweighted level |
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MPX signal |
weighted level |
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MBE512 |
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optional level shift |
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information |
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information |
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Fig.1 Block diagram and application circuit. |
TDA1593 |
(1) Connecting pin 13 to ground is only allowed to measure the current on pin 16; it is not used in application. |
|
Semiconductors Philips
specification Product
Philips Semiconductors |
Product specification |
|
|
IF amplifier/demodulator for
TDA1593
FM car radio receivers
PINNING
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PIN |
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SYMBOL |
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DESCRIPTION |
SOT102-1 |
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SOT163-1 |
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DIP18 |
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SO20 |
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VP |
1 |
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1 |
supply voltage (+8.5 V) |
LVA |
2 |
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2 |
level adjustment for stop condition |
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ULV |
3 |
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3 |
unweighted level output |
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VoAF |
4 |
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4 |
audio frequency output (MPX signal) |
Vref |
5 |
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5 |
reference voltage output |
WLV |
6 |
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6 |
weighted level output |
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n.c. |
7 |
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7 |
not connected |
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DDV |
8 |
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8 |
detune detector voltage |
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n.c. |
− |
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9 |
not connected |
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DEMI1 |
9 |
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10 |
demodulator input 1 |
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DEMI2 |
10 |
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11 |
demodulator input 2 |
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n.c. |
− |
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12 |
not connected |
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TSW |
11 |
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13 |
tau switch input |
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ST1 |
12 |
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14 |
STOP-1, stop pulse output 1 |
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ST0 |
13 |
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15 |
STOP-0, stop pulse output 0 |
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MUTE |
14 |
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16 |
muting voltage |
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GND |
15 |
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17 |
ground (0 V) |
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LFB1 |
16 |
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18 |
IF limiter feedback 1 |
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LFB2 |
17 |
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19 |
IF limiter feedback 2 |
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ViIF |
18 |
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20 |
IF signal input |
1996 Oct 10 |
4 |
Philips Semiconductors |
Product specification |
|
|
IF amplifier/demodulator for
TDA1593
FM car radio receivers
VP |
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ViIF |
1 |
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18 |
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LVA |
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2 |
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17 |
LFB2 |
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ULV |
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3 |
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16 |
LFB1 |
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VoAF |
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4 |
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15 |
GND |
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Vref |
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TDA1593 |
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5 |
14 |
MUTE |
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WLV |
6 |
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13 |
ST0 |
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n.c. |
7 |
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12 |
ST1 |
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DDV |
8 |
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11 |
TSW |
DEMI1 |
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DEMI2 |
9 |
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10 |
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MBE513 |
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Fig.2 Pin configuration for DIP-version.
FUNCTIONAL DESCRIPTION
The limiter amplifier has five stages of IF amplification using balanced differential limiter amplifiers with emitter follower coupling.
Decoupling of the stages from the supply voltage line and an internal high-ohmic DC feedback loop give a very stable IF performance. The amplifier gain is virtually independent of changes in temperature.
The FM demodulator is fully balanced and compromises two cross-coupled differential amplifiers.
The quadrature detection of the FM signal is performed by direct feeding of one differential amplifier from the limiter amplifier output, and the other via an external 90 degrees phase shifting network. The demodulator has a good stability and a small zero-cross-over shift. The bandwidth of the demodulator output is restricted by an internal low-pass filter to approximately 1 MHz. Non-linearities, which are introduced by demodulation, are compensated by the THD compensation circuit. For this reason, the demodulator resonance circuit (between pins 10 and 11)
VP |
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ViIF |
1 |
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20 |
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LVA |
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2 |
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19 |
LFB2 |
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ULV |
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3 |
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18 |
LFB1 |
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VoAF |
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GND |
4 |
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17 |
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Vref |
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5 |
TDA1593T |
16 |
MUTE |
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WLV |
6 |
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15 |
ST0 |
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n.c. |
7 |
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14 |
ST1 |
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DDV |
8 |
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13 |
TSW |
n.c. |
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n.c. |
9 |
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12 |
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DEMI1 |
10 |
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11 |
DEMI2 |
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MBE514 |
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Fig.3 Pin configuration for SO-version.
must have a loaded Q-factor of 19. Consequently, there is no need for the demodulator tuned circuit to be adjusted for minimum distortion. Adjustment criterion is a symmetrical stop pulse. The control voltage for the mute attenuator (pin 16) is derived from the values of the level detector and the detuning detector output signals.
The mute attenuator has a fast attack and a slow decay determined by the capacitor on pin 16. The AF signal is fed via the mute attenuator to the output (pin 4). A weighted control voltage (pin 6) is obtained from the mute attenuator control voltage via a buffer amplifier that introduces an additional voltage shift and gain.
The level detector generates a voltage output signal proportional to the amplitude of the input signal.
The unweighted level detector output signal is available. The open-collector tuning stop output voltages STOP-0 and STOP-1 (pins 15 and 14) are derived from the detuning and the input signal level. The pins 14 and 15 may be tied together, if only one tuning-stop output is required.
1996 Oct 10 |
5 |
Philips Semiconductors |
Product specification |
|
|
IF amplifier/demodulator for
TDA1593
FM car radio receivers
LIMITING VALUES
TDA1593T pinning
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL |
PARAMETER |
MIN. |
MAX. |
UNIT |
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VP |
supply voltage (pin 1) |
−0.3 |
+13 |
V |
Vn |
voltage at pins 2, 4, 5, 6, 10, 11 and 16 |
−0.3 |
+10 |
V |
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voltage at pins 3, 8, 14, 15, 18, 19 and 20 |
−0.3 |
VP |
V |
V13 |
voltage on pin 13 |
− |
6 |
V |
I14, 15 |
current at pins 14 and 15 |
− |
2 |
mA |
Ptot |
total power dissipation |
− |
360 |
mW |
Tstg |
storage temperature |
−55 |
+150 |
°C |
Tamb |
operating ambient temperature |
−40 |
+85 |
°C |
Ves |
electrostatic handling; note 1 |
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all pins except pin 5 |
−2000 |
+2000 |
V |
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pin 5 |
−2000 |
+800 |
V |
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Note
1. Equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.
THERMAL CHARACTERISTICS
SYMBOL |
PARAMETER |
VALUE |
UNIT |
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Rth j-a |
thermal resistance from junction to ambient in free air |
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SOT102-1 |
80 |
K/W |
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SOT163-1 |
90 |
K/W |
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1996 Oct 10 |
6 |
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