Philips TDA1593, TDA1593T Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA1593

IF amplifier/demodulator for
FM car radio receivers

Product specification
Supersedes data of 1995 May 29
File under Integrated Circuits, IC01

1996 Oct 10

Philips Semiconductors Product specification

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.

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

V

P

I

P

V

iIF

V

oAF

S/N signal-to-noise ratio (f
THD total harmonic distortion (f
T

amb

supply voltage (pin 1) 7.5 8.5 12 V
supply current (l2=0) − 20 26 mA
IF input sensitivity for limiting on pin 20 (RMS value) 14 22 35 µV
AF output signal on pin 4 (RMS value) 180 200 220 mV

= 400 Hz; ∆f=±75 kHz) − 82 − dB

m

= 1 kHz; ∆f=±75 kHz) − 0.2 0.6 %

m

operating ambient temperature −40 − +85 °C

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.

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA1593 DIP18 plastic dual in-line package; 18 leads (300 mil) SOT102-1
TDA1593T SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1

1996 Oct 10 2

Philips Semiconductors Product specification

IF amplifier/demodulator for
FM car radio receivers

BLOCK DIAGRAM

5 V

25 kΩ

STOP 1

25 kΩ

STOP 0

16 15 14

47 nF

n.c.
12

100

DEMI2
11

pF

TDA1593

DDVWLVLVA ULV V

n.c.

V

ref

oAF

MBE512

100 nF

information

weighted level

MPX signal

=19

3.3 

kΩ

DEMI1
10

L

Q

9 n.c.

86754321

TDA1593T

int

V

offset

V

x2

DETUNE

int

V

ref

V

(1)

13

int

V

DETECTOR

HP

FILTER

LP

FILTER

50 kHz

1 MHz

ref

MUTE

25 kΩ

THD

V

ATTENUATOR

COMPENSATION

Fig.1 Block diagram and application circuit.

QUADRATURE

17

9 pF

25 kΩ

18

22 nF

LFB2 LFB1 GND TSW MUTE ST0 ST1

22 nF

19

LEVEL

iIF

20

V

DETECTOR

330 Ω

int

V

25

kΩ

DEMODULATOR

int

V

40 kΩ

LIMITING

AMPLIFIER

9 pF

40

kΩ

VOLTAGE

STABILIZER

information

unweighted level

7.5 kΩ

ref

optional level shift

ref

V

V

SFE

input

FM-IF

1996 Oct 10 3

p ( 8.5 V)

V

(1) Connecting pin 13 to ground is only allowed to measure the current on pin 16; it is not used in application.

Philips Semiconductors Product specification

IF amplifier/demodulator for
FM car radio receivers

PINNING

PIN

SYMBOL

V

P

LVA 2 2 level adjustment for stop condition
ULV 3 3 unweighted level output
V

oAF

V

ref

WLV 6 6 weighted level output
n.c. 7 7 not connected
DDV 8 8 detune detector voltage
n.c. − 9 not connected
DEMI1 9 10 demodulator input 1
DEMI2 10 11 demodulator input 2
n.c. − 12 not connected
TSW 11 13 tau switch input
ST1 12 14 STOP-1, stop pulse output 1
ST0 13 15 STOP-0, stop pulse output 0
MUTE 14 16 muting voltage
GND 15 17 ground (0 V)
LFB1 16 18 IF limiter feedback 1
LFB2 17 19 IF limiter feedback 2
V

iIF

SOT102-1

DIP18

1 1 supply voltage (+8.5 V)

4 4 audio frequency output (MPX signal)
5 5 reference voltage output

18 20 IF signal input

SOT163-1

SO20

DESCRIPTION

TDA1593

1996 Oct 10 4

Philips Semiconductors Product specification

IF amplifier/demodulator for
FM car radio receivers

V

1

P

LVA

2

ULV

3

V

4

oAF
V

5

ref

WLV

n.c.

DDV

DEMI1 DEMI2

TDA1593

6
7
8
9

MBE513

V

18

iIF

17

LFB2

16

LFB1

15

GND

14

MUTE

13

ST0

12

ST1

11

TSW

10

TDA1593

V

1

P

LVA

2

ULV

3

V

4

oAF
V

5

ref

TDA1593T

6

WLV

7

n.c.

8

DDV

n.c. n.c.

9

10

DEMI1 DEMI2

MBE514

V

20

iIF

19

LFB2

18

LFB1
GND

17
16

MUTE

15

ST0

14

ST1

13

TSW
12
11

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)

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

V

P

V

n

V

13

I

14, 15

P

tot

T

stg

T

amb

V

es

Note

1. Equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.

supply voltage (pin 1) −0.3 +13 V
voltage at pins 2, 4, 5, 6, 10, 11and 16 −0.3 +10 V
voltage at pins 3, 8, 14, 15, 18, 19 and 20 −0.3 V

P

voltage on pin 13 − 6V
current at pins 14 and 15 − 2mA
total power dissipation − 360 mW
storage temperature −55 +150 °C
operating ambient temperature −40 +85 °C
electrostatic handling; note 1

all pins except pin 5 −2000 +2000 V
pin 5 −2000 +800 V

V

THERMAL CHARACTERISTICS

SYMBOL PARAMETER VALUE UNIT

R

th j-a

thermal resistance from junction to ambient in free air

SOT102-1 80 K/W
SOT163-1 90 K/W

1996 Oct 10 6