Philips TDA1591 Datasheet

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
PLL stereo decoder and noise blanker	TDA1591

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
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	%
S/N	signal-to-noise ratio	−	76	−	dB
αcs	channel separation	−	40	−	dB
Vtrigg	interference voltage trigger level	−	10	−	mV

ORDERING INFORMATION

TYPE		PACKAGE
NUMBER	NAME	DESCRIPTION	VERSION
TDA1591	DIP20	plastic dual in-line package; 20 leads (300 mil)	SOT146-1
TDA1591T	SO20	plastic small outline package; 20 leads; body width 7.5 mm	SOT163-1

1996 Sep 02

2

02 Sep 1996

3

from IF level detector

stereo

SNC

HCC

indication

IDENT

100 kΩ

100 kΩ

from pin 5

V = 1 to 5 V

0.22

ref

27 kΩ

F

ViAUX

forced

12 kΩ

R1

mono

10 kΩ

47 kΩ

27 kΩ

R2

0.22 F

0.1

V i MPX 68 kΩ

82 kΩ

470 kΩ

6.8 nF

F

6.8 nF

47 kΩ

VoR

PILOT

FB-R

0.1 F

68 pF

(1)

20

19

18

17

16

15

14

13

12

11

Ccomp

75 kΩ

PILOT

SWITCH

STEREO

DETECTOR

BLEND

6.5

+

+

kΩ

7.4 kΩ

4-POLE

PILOT

2-POLE

GATE

FILTER

FILTER

AND

CANCEL

(80 kHz)

(30 kHz)

HCC

38 kHz

7.4 kΩ

19 kHz

TDA1591

PHASE

LOGIC

INTERFERENCE

PULSE

DETECTOR

DETECTOR

FORMER

6.5 kΩ

VOLTAGE

REFERENCE

+

NOISE

+

VCO

STABILIZER

CURRENT

DETECTOR

1

2

3

4

5

6

7

8

9

10

27 kΩ

470

47

FB-L

47 kΩ

VoL

0.1

470

2.2

pF

nF

R3

0.22 F

0.22

22

100 kΩ

pF

kΩ

47 kΩ

CSB456F11

F

F

nF

0.22 F

(Murata)

ViAUX

VP = 10 V

10 Ω

1.2

100

mute on

pagewidth

nF

VCO off

MEH027

INFI

interference signal (TDA1596, pin 3)

F

full

(1) Simulates the roll-off of the FM demodulator.

handbook,

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
PLL stereo decoder and noise blanker	TDA1591

PINNING

	SYMBOL	PIN	DESCRIPTION
	PLL	1	phase locked loop filter
	OSC	2	oscillator input/output pin for
			ceramic resonator
	GND	3	ground (0 V)
	Iref	4	reference current
	VP	5	supply voltage (+10 V)
	INFI	6	interference signal input		handbook, halfpage
	PUFO	7	pulse former time constant;
			VCO off
	NDET	8	noise detector time constant;
			mute on
	FB-L	9	AF feedback input for left audio
			signal
	VoL	10	AF output signal left
	VoR	11	AF output signal right
	FB-R	12	AF feedback input for right audio
			signal
	CDEEL	13	de-emphasis capacitor for left
			channel
	CDEER	14	de-emphasis capacitor for right
			channel
	HCC	15	HCC input for de-emphasis control
	SNC	16	stereo blend input
	Vref	17	externally applied reference
			voltage of 1 to 5 V
	IDENT	18	identification output (HIGH = pilot
			existing; stereo)
	PILOT	19	pilot detector level (forced mono
			input)
	Vi MPX	20	MPX input signal from IF
			demodulator

				Vi MPX
PLL	1		20
OSC
	2		19	PILOT
GND
	3		18	IDENT
Iref				Vref
	4		17
VP				SNC
	5	TDA1591	16
INFI				HCC
	6		15
				CDEER
PUFO	7		14
				CDEEL
NDET	8		13
FB-L				FB-R
	9		12
VoL				VoR
	10		11
		MHA363

Fig.2 Pin configuration.

1996 Sep 02

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Philips Semiconductors	Product specification
PLL stereo decoder and noise blanker	TDA1591

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
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
	pins 1 and 16	−400	+400	V
	pin 5	−300	+300	V
	all other pins	−600	+600	V

Note

1. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor.

1996 Sep 02

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Philips Semiconductors	Product specification
PLL stereo decoder and noise blanker	TDA1591

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
Supply
VP	supply voltage (pin 5)		7.5	10	12	V
IP	supply current		−	12	−	mA
Stereo decoder
Vi MPX(p-p)	MPX input signal on pin 20		−	1.7	−	V
	(peak-to-peak value)
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
	(RMS value)
Vo	overdrive margin of output signal	THD = 1%	3	−	−	dB
V10-11/Vo	difference of output voltage levels		−	−	1	dB
Vo 10,11	DC output voltage (pins 10 and 11)		3.3	3.8	4.3	V
Ro 10,11	output resistance		−	130	−	Ω
αcs	channel separation	pin 16 open-circuit;	−	40	−	dB
		see Fig.6
THD	total harmonic distortion		−	0.1	0.3	%
S/N	signal-to-noise ratio	f = 20 to 16000 Hz	−	76	−	dB
α19	pilot signal suppression	f = 19 kHz	−	50	−	dB
α38	subcarrier suppression	f = 38 kHz	−	50	−	dB
α57		f = 57 kHz	−	46	−	dB
α76		f = 76 kHz	−	60	−	dB
IM2	intermodulation for fspur = 1 kHz	fmod = 10 kHz; note 1	−	60	−	dB
IM3		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
	(SCA)
α114	Adjacent Channel Interference (ACI)	f = 114 kHz; note 4	−	80	−	dB
α190		f = 190 kHz; note 4	−	70	−	dB
PSRR	power supply ripple rejection	f = 100 Hz;	−	35	−	dB
		Vripple(rms) = 100 mV
VCO (pin 2)
fosc	oscillator frequency (ceramic resonator)		−	456	−	kHz
	frequency range of free running oscillator		452	−	460	kHz
f/f	capture and holding range		−	1	−	%
V7	VCO-off voltage (pin 7)		0	−	0.6	V

1996 Sep 02

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