Philips TEA5594 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TEA5594

AM/FM radio receiver circuit

Product speciﬁcation File under Integrated Circuits, IC01

March 1991

Philips Semiconductors Product speciﬁcation

AM/FM radio receiver circuit TEA5594

GENERAL DESCRIPTION

The TEA5594 is a 32-pin integrated radio circuit designed for use in all Electronic Tuned Radio (ETR) sets especially those sets which have to fulfil the immunity requirements of CENELEC.

The AM circuit incorporates:

• A double balanced mixer

• A ‘one-pin’ oscillator with amplitude control operating in

the LW/MW frequency range

• An IF amplifier and AM detector

• An AGC circuit which controls the IF amplifier and mixer

The FM circuit incorporates:

• A front-end (fulfilling the “out of band” CENELEC requirements)

• Two IF amplifiers (for distributed selectivity)

• A quadrature demodulator with a ceramic filter

PACKAGE OUTLINE

32-lead shrink DIL; plastic (SOT232); SOT232-1; 1996 September 9.

The TEA5594 also contains:

• Oscillator output buffers for AM and FM

• A combined AM/FM IF counter output buffer with

counter “enable” function

• A field strength level detector for AM and FM

• A soft mute circuit at FM, adjustable

• An extra IF amplifier to split up IF filtering

Features

• Low distortion on FM

• AM/FM level/indicator circuit

• A DC AM/FM switch facility

• Supply voltages 2.7 to 15 V

• A local distance switch facility (LOCAL-DX) at FM

• All pins are ESD protected

March 1991 2

Philips Semiconductors Product speciﬁcation

AM/FM radio receiver circuit TEA5594

QUICK REFERENCE DATA

PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT

Supply voltage (pin 9) V

P

Total current consumption

AM part I FM part I

Operating ambient temperature range T

AM performance (pin 22)

Sensitivity V

note 1

= 10 mV V

o

(S + N)/N = 26 dB V

Signal-to-noise ratio V

= 1 mV (S + N)/N − 48 − dB

i

AF output voltage V

P P

amb

i i

o

Total harmonic distortion THD − 0.8 − % Signal handling m = 80%; THD = 8% V

FM performance (pin 30)

note 2

Limiting sensitivity −3 dB; note 3 V Signal-to-noise ratio V

= 3 µV (S + N)/N − 26 − dB

i

= 1 mV (S + N)/N − 60 − dB

V

i

AF output voltage V

i

o

Total harmonic distortion THD − 0.1 − % Maximum signal handling V AM suppression 100 µV < V

<

i

100 mV AMS − 50 − dB

2.7 − 15 V

− 13 − mA

− 24 − mA

−40 − +85 °C

− 3.5 −µV

− 16 −µV

− 50 − mV

− 100 − mV

− 2.5 −µV

− 90 − mV

− 200 − mV

Notes to the quick reference data

1. All parameters are measured in the application circuit (see Fig.5) at nominal supply voltage V

unless otherwise specified. RF conditions: Input frequency 1 MHz; 30% modulated with f

= 8.5 V; T

p

= 1 kHz; unless

mod

otherwise specified.

2. All parameters are measured in the application circuit (see Fig.5) at nominal supply voltage Vp = 8.5 V; T

unless otherwise specified. RF conditions: Input frequency 100 MHz; frequency deviation ∆f = 22.5 kHz and f

= 1 kHz; unless otherwise specified.

mod

3. Soft mute switched off.

March 1991 3

= 25 °C;

amb

= 25 °C;

amb

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March 1991 4

Philips Semiconductors Product speciﬁcation

AM/FM radio receiver circuit TEA5594

FM

oscillator

GND

(FM front-end)

FM RF

output

FM RF

input

FM RF

decoupled

FM RF

AGC

26

OSCILLATOR

32

28

30 31

RF AMPLIFIER

29

FM

BUFFER

FM

AGC

GND

(oscillator buffer)

FM

MIXER

AM RF

input

decoupled

AM

RF AMPLIFIER

BUFFER

TEA5594

AM

mixer outputAMoscillator

AM MIXER

BUFFER

AM

OSCILLATOR

LEVEL

CONTROLLER

AM AGC

AM

AGC

FM

LEVEL

DETECTOR

FM

IF LIMITER

AM IF

input

141525162319 22

AM

IF AMPLIFIER

AM

DETECTOR

AM

LEVEL

DETECTOR

AF

SOFT MUTE

FM

DEMODULATOR

13

1

11

AM / FM

level indicator

output

soft mute

FM

demodulator

FM IF1

input

FM RF STABILIZER

FM

demodulator

FM IF

2.3 V

FM IF

input

AM

oscillator

output

FM

front-end

FM RF

1.6 V

FM IF

V

P

AM GND

handbook, full pagewidth

AM

1.6 VFM2.3 V

4

FM

IF AMPLIFIER

3 5 17 2 18 27 9 10 24 8 6 7 20 21

FM IF

2.3 V

FM IF1

outputFMoscillator

output

FM

mixer

output

Fig.1 Block diagram.

BUFFER

IF

counter

output

IF

counter

enable

input

12

MLA283

AF output

AM / FM

Philips Semiconductors Product speciﬁcation

AM/FM radio receiver circuit TEA5594

handbook, full pagewidth

IF +

mute

FM

mixer output

2.3 V

FM IF

2.3

FM IF1

input

2.3 V

FM IF1

output

2.2 V

FM IF

2.3 V

FM IF

input

2.3 V

FM stabilizer

2.3 V

IF +

I level

soft

V

p6

32

1

2

3

4

5

6

7

8

IF + p8

360 Ω

(3 x)

360 Ω

(4 x)

V

FM RF +

330 Ω

IF + p6

ref

FM OSC FM OSC

330 Ω

TEA5594

IF + p8

FM MIXER

AM +

2 pF

FM RF +

330

Ω

IF + p6

1.5 kΩ

12.5 kΩ

25 Ω

GND FM front-end

31

FM RF decoupled

1.6 V

FM RF input

30

0.9 V

FM RF AGC

29

1 to 0.3 V

FM RF output

28

FM RF

stabilizer

27

1.6 V

26

FM oscillator

25

AM oscillator

2.7 to 15 V

GND (FM - IF

AM)

FM demodulator

1.3 V

AF output AM/FM

AM ~ 0.3 V

FM ~ 1.1 V AM/FM

level indicator

output

AM IF input

0.8 V

AM AGC

1.5 to1.1 V

mixer output

1.6 V

V

P

9

3.9 kΩ

AM OSC AM OSC

4.2 kΩ

AM +

10.3 kΩ

1.7 kΩ

8.9 kΩ

AM +

V

ref

AM + IF + p8

2 kΩ

510 Ω

700 Ω

FM RF +

1

kΩ

10

V

P

1.5 kΩ

AM AGC

IF + p8 AM

2.7 kΩ

14 kΩ

AM AGC

+

V

ref

2 kΩ

AM +

11

12

13

14

15

16

24

23

22

21

20

19

18

300 Ω

17

AM voltage stabilizer

1.6 V

AM RF decoupled

1.1 V

AM RF input

IF counter

enable input

IF counter

output

GND

(oscillator buffer)

AM

oscillator output

FM

oscillator output

MLA284

Fig.2 Equivalent circuit diagram.

March 1991 5

Philips Semiconductors Product speciﬁcation

AM/FM radio receiver circuit TEA5594

PINNING

handbook, full pagewidth

soft mute

FM mixer output

FM IF 2.3 V

FM IF1 input

FM IF1 output

FM IF 2.3 V

FM IF input

FM stabilizer 2.3 V

+V

GND (FM-IF AM)

FM demodulator

AF output AM / FM

AM / FM level indicator output

AM IF input

AM AGC

AM mixer output FM oscillator output

1 2 3 4 5 6 7 8

TEA5594

9

P

10 11 12

13 14 15 16

MLA285 - 1

32

GND (FM front-end) FM RF decoupled

31

FM RF input

30

FM RF AGC

29

FM RF output

28

FM front-end voltage stabilizer

27

FM oscillator

26

AM oscillator

25

AM voltage stabilizer

24 23

AM RF decoupled AM RF input

22 21

IF counter enable input IF counter output

20

19

GND (oscillator buffer)

18

AM oscillator output

17

Fig.3 Pinning diagram.

March 1991 6