Datasheet tda9821 DATASHEETS (Philips)

INTEGRATED CIRCUITS

DATA SH EET

TDA9821

Dual channel TV FM intercarrier
sound demodulator

Product specification
Supersedes data of March 1991
File under Integrated Circuits, IC02

1996 Nov 20

Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821

sound demodulator

FEATURES

• Two alignment-free PLL FM demodulators

• Automatic second sound carrier mute

• Mono and dual channel application

• Low power consumption

• Few external components required.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

I

P

I

M

V

i(rms)

V

o(rms)

SN+

-------------­N

α

8/7

supply voltage (pin 14) 4.5 5.0 8.8 V
supply current (pin 14) 23 30 37 mA
AC peak current (pins 7 and 8) −−1.5 mA
input signal (RMS value) − 150 250 µV

output signal (pins 7 and 8; RMS value) ∆fi= ±50 kHz 0.4 0.5 0.6 V
signal plus noise-to-noise ratio

(pins 7 and 8)
crosstalk attenuation f = 50 to 12500 Hz 60 70 − dB

RR supply voltage ripple rejection

(pins 7 and 8)

T

amb

operating ambient temperature 0 − 70 °C

GENERAL DESCRIPTION

The TDA9821 is a monolithic, integrated, TV FM
intercarrier sound demodulator for all FM standards.
The circuit contains two separate FM demodulators using
Phase Locked Loop (PLL) reference frequency
generation. The circuit requires a minimum number of
external components.

SN+

--------------

in accordance with

N

40 dB=

64 68 − dB

“CCIR 468-3”

< 200 mV; f = 70 Hz 16 20 − dB

V

RR

ORDERING INFORMATION

PACKAGE

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA9821 DIP16 plastic dual in-line package; 16 leads (300 mil); long body SOT38-1

1996 Nov 20 2

Philips Semiconductors Product specification

Dual channel TV FM intercarrier
sound demodulator

BLOCK DIAGRAM

handbook, full pagewidth

5.5 MHz (B/G)
1

TDA9821

AMPLIFIER 1

7-STAGE

LIMITER

R

s

VCO 1

TDA9821

(1)

9

V

AF1

8

intercarrier

5.74 MHz (B/G)
15

SUPPLY

V =

P

4.5 to 8.8 V

7-STAGE

LIMITER

AMPLIFIER 2

11121413

VCO

ref

mute

VCO 2

optional stereo
channel separation
adjustment

V

AF2

7

10

MHA424

(1)

R

pot

(1) Resistor and potentiometer between capacitor and earth are inserted if adjustment of stereo channel separation is required.

Fig.1 Block diagram.

1996 Nov 20 3

Philips Semiconductors Product specification

Dual channel TV FM intercarrier
sound demodulator

PINNING

SYMBOL PIN DESCRIPTION

IN

1(B/G)

n.c. 2 not connected
n.c. 3 not connected
n.c. 4 not connected
n.c. 5 not connected
n.c. 6 not connected
V

AF2

V

AF1

C

1

C

2

VCO

ref

C

STAB

GND 13 ground
V

P

IN

2(B/G)

n.c. 16 not connected

1 intercarrier input 1 at 5.5 MHz

7 audio output voltage 2
8 audio output voltage 1

9 decoupling capacitor 1
10 decoupling capacitor 2
11 VCO reference
12 supply voltage stabilization

14 supply voltage
15 intercarrier input 2

handbook, halfpage

IN

1(B/G)

n.c.
n.c.
n.c.
n.c.
n.c.

V

AF2

V

AF1

1
2
3
4
5
6
7
8

TDA9821

MHA531

Fig.2 Pin configuration.

TDA9821

n.c.

16

IN

15

2(B/G)

V

14

P

13

GND
C

12

STAB

VCO

11

ref

C

10

2

C

9

1

FUNCTIONAL DESCRIPTION

The complete circuit consists of two separate channels,
each consisting of a limiter-amplifier, FM demodulator and
AF amplifier. Circuit operation is also described in Fig.1.

FM demodulators

The intercarrier signal is fed through external ceramic
band-pass filters which are tuned to the sound carrier
frequencies.

Each limiter-amplifier is AC-coupled into a
FM demodulator. The integrated FM demodulator PLLs
are alignment-free. The FM demodulator outputs are
amplified to 500 mV (RMS value). High amplification and
DC error signals of the PLLs, which are superimposed on
the FM demodulator outputs, require DC decoupling at
pins 9 and 10 of the AF amplifier inputs.

Stereo channel separation adjustment (optional)

Optimal stereo channel separation is achieved by
adjusting V

1. V

AF1

(pin 8) and V

AF1

(pin 7) as follows:

AF2

by a resistor in series with the DC decoupling

capacitor at pin 9

2. V

by a variable resistor in series with the

AF2

DC decoupling capacitor on pin 10 to the same
voltage as V

AF1

.

Normally stereo channel separation is adjusted in the
stereo decoder for the B/G standard.

1996 Nov 20 4

Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821

sound demodulator

Second sound carrier mute

The output of the second FM demodulator is muted when
the signal level (signal and/or noise) at pin 15 is less than
typically 0.5 mV (RMS value). This avoids an incorrect
stereo or dual sound identification when a mono signal is

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

P

V

i

t

s

supply voltage (pin 14) −0.5 +9.0 V
input signal (pins 1 and 15) −0.5 +5.0 V
short-circuit time (each pin except pins 13 and 14 to

be tested; one at the time)

T

stg

storage temperature

device −25 +125 °C

device in packing −25 +85 °C

T

j

T

amb

V

es

junction temperature − 150 °C
operating ambient temperature 0 70 °C
electrostatic handling for all pins note 1 −500 +500 V

transmitted. Therefore, with a mono transmission, there is
no audio output at pin 7. When the signal level at pin 15 is
greater than typically 1.0 mV (RMS value) mute is
switched off.

− 10 s

note 2 −4000 +4000 V

Notes

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

2. Equivalent to discharging a 100 pF capacitor via a 1.5 kΩ series resistor.

THERMAL CHARACTERISTICS

SYMBOL PARAMETER VALUE UNIT

R

th j-a

thermal resistance from junction to ambient in free air 74 K/W

1996 Nov 20 5

Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821

sound demodulator

CHARACTERISTICS

All voltages are measured to GND (pin 13); VP=5V; T
V

= 10 mV (RMS value); measurements taken in Fig.5; unless otherwise specified.

1, 15

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply (pin 14)

V

P

I

P

supply voltage 4.5 5.0 8.8 V
supply current 23 30 37 mA

Limiter-amplifier 1

V

1

R

1

V

1(rms)

DC input voltage 2.25 2.5 2.75 V
input resistance 480 600 720 Ω
input signal (RMS value) − 150 250 µV

allowed input signal (RMS value) 200 −−mV

Limiter-amplifier 2

V

15

V

15(rms)

DC input voltage 2.25 2.5 2.75 V
input signal (RMS value)

input signal for mute off (RMS value) 0.7 1.0 1.5 mV

allowed input signal (RMS value) 200 −−mV
∆V
R

15

15

mute hysteresis 8 12 16 dB

input resistance 480 600 720 Ω

PLL FM demodulators VCO1 and VCO2

f

VCO1

f

VCO2

∆f

fr

free-running frequency R11=27kΩ−5.5 − MHz

free-running frequency R11=27kΩ−5.7 − MHz

negative/positive free-running

frequency spread
D/∆f
∆f

fr(shift)

∆f

fr(ar)

fr

drift of free-running frequencies T

shift of free-running frequencies 4.5 V < VP< 8.8 V − 200 − kHz

negative/positive adjustment range of

free-running frequencies
R

11

adjustment resistance for free-running

frequencies (pin 11)
S negative slope of free-running frequency

adjustment

∆f1 negative/positive catching range of PLLs 1.4 1.9 − MHz
∆f2 negative/positive holding range of PLLs 2.0 3.0 − MHz

=25°C; ∆fi= ±50 kHz; f

amb

SN+

--------------

SN+

--------------

N

N

40 dB=

40 dB=

; note 1

= 1 kHz;

mod

− 150 250 µV

−−10 %

= 0 to 70 °C − 500 − kHz

amb

R11=22kΩ 1 −−MHz

15 − 29 kΩ

=22kΩ−200 − kHz/kΩ

R

11

1996 Nov 20 6

Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821

sound demodulator

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Output amplifiers AF1 (pin 8) and AF2 (pin 7) and overall performance

V

O

V

o(rms)

I

M

I

O

∆V

o/Vo

/∆Vo2relative drift of AF output signals T

∆V

o1

∆V

AF(1-2)

R

o

α

cs(ar)

THD total harmonic distortion 50 µs de-emphasis

α

AM

SN+

-------------­N

AF

resp

AM

res(rms)

α

8/7

RR supply voltage ripple rejection V

RR supply voltage ripple rejection with

DC output voltage 1.8 2.1 2.5 V
output signal (RMS value) 0.4 0.5 0.6 V

clipping level 1.2 −−V
AC peak current −−1.5 mA
DC source current −−2.0 mA
absolute drift of AF output signals T

negative/positive difference between

= 0 to 70 °C − 0.7 − dB

amb

= 0 to 70 °C − 0.2 − dB

amb

50 µs de-emphasis − 0.3 1.0 dB
output signals

output resistance − 100 −Ω
adjustment range of channel separation Rs= 1.1 kΩ;

R

= 2.2 kΩ

pot

1.5 −−dB

pin 8 − 0.1 0.3 %
pin 7 − 0.25 0.5 %

AM suppression of AF(1-2) 50 µs de-emphasis;

46 66 − dB

m = 0.3; fAM= 1 kHz
signal plus noise-to-noise ratio 50 µs de-emphasis;

64 68 − dB

in accordance with

“CCIR 468-3”

LOW-level AF frequency response ∆V

= −3dB −−20 Hz

AF(1-2)

HIGH-level AF frequency response 200 −−kHz
residual sound carrier signal and

− 50 80 mV

harmonics (RMS value)
crosstalk attenuation between

f = 50 to 12500 Hz 60 70 − dB
AF outputs

< 200 mV;

RR

fr=20Hzto200kHz

=5V 16 20 − dB

V

P

=8V 24 28 − dB

V

P

fr= 20 Hz to 3 kHz;
improved application for V

=5V

P

see Fig.3 and note 2

= 4.5 V 18 24 − dB

V

P

= 4.75 V 21 27 − dB

V

P

V

= 5.0 V 24 30 − dB

P

= 5.5 V 21 27 − dB

V

P

1996 Nov 20 7

Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821

sound demodulator

Notes

1. The output signal at pin 7 can only be measured when mute is disabled. This is achieved by inserting a resistor of

2.7 kΩ between pin 15 and ground. In this event the input impedance is 490 Ω.

2. Improvement of ripple rejection is possible by connecting series RC between pin 11 and pin 14 (15 kΩ + 2.2 µF;
see Fig.5) for a supply voltage of 4.5 to 5.5 V. The rejection of ripple frequencies up to 3 kHz is improved, but up to
200 kHz is worse; see Fig.3.

40

handbook, full pagewidth

RR

(dB)

30

20

(1)

(2)

MHA530

10

0

45678

The curves are typical and valid for ripple frequencies between 50 Hz and 3kHz.
Conditions: input signal: f =5.5 MHz, 10mV (RMS value); ripple on VP= 100mV (RMSvalue), fr= 1kHz;

ripple rejection measurement: unweighted RMS.
(1) Without RC.
(2) With R = 15 kΩ and C = 2.2 µF.

Fig.3 Typical improvement.

9VP (V)

1996 Nov 20 8

Philips Semiconductors Product specification

Dual channel TV FM intercarrier
sound demodulator

INTERNAL CIRCUITRY

handbook, full pagewidth

3.5 V

620

Ω

5.5
k

16

3.5 V

15

14

+

n.c.

670

Ω

10 kΩ

5.5

Ω

k

Ω

n.c. n.c. n.c. n.c.

13

TDA9821

n.c.

12

300 µA

TDA9821

11

3

3

Ω

k

Ω

k

3.6 V

10

AF2

5

Ω

k

50

Ω

k

2.54 V

2 mA

Ω

100

5
k

Ω

100

AF1

50
k

Ω

Ω

9

2.54 V

2 mA

1

2

3

4

5

6

7

8

MHA425

Fig.4 Internal circuitry.

1996 Nov 20 9

Philips Semiconductors Product specification

Dual channel TV FM intercarrier
sound demodulator

TEST AND APPLICATION INFORMATION

handbook, full pagewidth

V

intercarrier

5.74 MHz

2.2
nF

n.c.

600 Ω

12163

600 Ω

2.2
nF

15

n.c. n.c. n.c. n.c.

P

10 µF

10 nF

14

15 kΩ

13

TDA9821

4

n.c.

2.2 µF

TDA9821

optional stereo

channel separation

adjustment

9

8

R

s

2.2 µF

2.2 kΩ

22
nF

22
nF

R

pot

27 kΩ

2.2 µF

(1)(1)

12

5

11

6

2.2 kΩ 1.1 kΩ

2.2 µF

10

7

2.2 kΩ

intercarrier

5.5 MHz

(1) See note 2 of Chapter “Characteristics”.

Fig.5 Test circuit.

V

AF2

without

de-emphasis



V

AF2VAF1

with 50 µs

de-emphasis

MHA426

V

AF1

1996 Nov 20 10

Philips Semiconductors Product specification

Dual channel TV FM intercarrier
sound demodulator

andbook, full pagewidth

intercarrier

5.74

n.c.

MHz

12163

5.5

MHz

(1)

R1

(1)

R15



15

n.c. n.c. n.c.

V

14

n.c.

TDA9821

P

10 µF

10 nF

2.2 µF 2.2 µF27 kΩ

13

TDA9821

4

n.c.

12

5

11

6

2.2 µF

10

7

V

AF2

9

8

V

MHA427

AF1

(1) Resistor value depends on filter.

Fig.6 Application circuit.

1996 Nov 20 11

Philips Semiconductors Product specification

Dual channel TV FM intercarrier
sound demodulator

PACKAGE OUTLINE

DIP16: plastic dual in-line package; 16 leads (300 mil); long body

D

seating plane

L

Z

16

e

b

b

1

9

A

1

w M

TDA9821

SOT38-1

M

E

A

2

A

c

(e )

1

M

H

pin 1 index

1

0 5 10 mm

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

UNIT

mm

inches

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

A

max.

4.7 0.51 3.7

OUTLINE
VERSION

SOT38-1

min.

A

1 2

max.

0.15

IEC JEDEC EIAJ

050G09 MO-001AE

b

1.40

1.14

0.055

0.045

b

0.53

0.38

0.021

0.015

1

cEe M

0.32

0.23

0.013

0.009

REFERENCES

D

21.8

21.4

0.86

0.84

8

scale

(1) (1)

6.48

6.20

0.26

0.24

E

(1)

Z

e

0.30

1

0.15

0.13

M

L

3.9

3.4

E

8.25

7.80

0.32

0.31

EUROPEAN

PROJECTION

9.5

8.3

0.37

0.33

w

H

0.2542.54 7.62

0.010.100.0200.19

ISSUE DATE

92-10-02
95-01-19

max.

2.2

0.087

1996 Nov 20 12

Philips Semiconductors Product specification

Dual channel TV FM intercarrier
sound demodulator

SOLDERING
Introduction

There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.

This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our

“IC Package Databook”

Soldering by dipping or by wave

The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.

(order code 9398 652 90011).

TDA9821

The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.

Repairing soldered joints

Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.

stg max

). If the

DEFINITIONS

Data sheet status

Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

1996 Nov 20 13

Philips Semiconductors Product specification

Dual channel TV FM intercarrier sound
demodulator

NOTES

TDA9821

1996 Nov 20 14

Philips Semiconductors Product specification

Dual channel TV FM intercarrier sound
demodulator

NOTES

TDA9821

1996 Nov 20 15

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© Philips Electronics N.V. 1996 SCA52
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Printed in The Netherlands 537021/1200/02/pp16 Date of release: 1996 Nov 20 Document order number: 9397 750 01506