INTEGRATED CIRCUITS

DATA SHEET

TDA9821
Dual channel TV FM intercarrier
sound demodulator
Product specification 1996 Nov 20
Supersedes data of March 1991
File under Integrated Circuits, IC02
Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821
sound demodulator

FEATURES GENERAL DESCRIPTION

• Two alignment-free PLL FM demodulators The TDA9821 is a monolithic, integrated, TV FM
• Automatic second sound carrier mute intercarrier sound demodulator for all FM standards.
The circuit contains two separate FM demodulators using
• Mono and dual channel application
Phase Locked Loop (PLL) reference frequency
• Low power consumption generation. The circuit requires a minimum number of
• Few external components required. external components.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VP supply voltage (pin 14) 4.5 5.0 8.8 V
IP supply current (pin 14) 23 30 37 mA
IM AC peak current (pins 7 and 8) − − 1.5 mA
Vi(rms) input signal (RMS value) S+N − 150 250 µV
-------------- = 40 dB
N
Vo(rms) output signal (pins 7 and 8; RMS value) ∆fi = ±50 kHz 0.4 0.5 0.6 V
S+N signal plus noise-to-noise ratio in accordance with 64 68 − dB
-------------- (pins 7 and 8) “CCIR 468-3”
N
α8/7 crosstalk attenuation f = 50 to 12500 Hz 60 70 − dB
RR supply voltage ripple rejection VRR < 200 mV; f = 70 Hz 16 20 − dB
(pins 7 and 8)
Tamb operating ambient temperature 0 − 70 °C

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

TDA9821
sound demodulator

BLOCK DIAGRAM

Rs (1)
handbook, full pagewidth

8 V AF1

TDA9821

5.5 MHz (B/G)

1 7-STAGE
LIMITER VCO 1
AMPLIFIER 1

5.74 MHz (B/G)

intercarrier 7-STAGE
15
LIMITER VCO 2
AMPLIFIER 2

7 V AF2
SUPPLY

mute

13 14 12 11 10
optional stereo MHA424

channel separation
adjustment
VCO ref (1)

VP = Rpot
4.5 to 8.8 V

(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

TDA9821
sound demodulator

PINNING

SYMBOL PIN DESCRIPTION

IN1(B/G) 1 intercarrier input 1 at 5.5 MHz
n.c. 2 not connected handbook, halfpage
IN1(B/G) 1 16 n.c.
n.c. 3 not connected
n.c. 2 15 IN2(B/G)
n.c. 4 not connected
n.c. 3 14 VP
n.c. 5 not connected
n.c. 4 13 GND
n.c. 6 not connected
TDA9821
VAF2 7 audio output voltage 2 n.c. 5 12 CSTAB

VAF1 8 audio output voltage 1 n.c. 6 11 VCOref

C1 9 decoupling capacitor 1 VAF2 7 10 C2

C2 10 decoupling capacitor 2 VAF1 8 9 C1
VCOref 11 VCO reference
MHA531
CSTAB 12 supply voltage stabilization
GND 13 ground
VP 14 supply voltage
IN2(B/G) 15 intercarrier input 2
Fig.2 Pin configuration.
n.c. 16 not connected

FUNCTIONAL DESCRIPTION Stereo channel separation adjustment (optional)

The complete circuit consists of two separate channels, Optimal stereo channel separation is achieved by
each consisting of a limiter-amplifier, FM demodulator and adjusting VAF1 (pin 8) and VAF2 (pin 7) as follows:
AF amplifier. Circuit operation is also described in Fig.1. 1. VAF1 by a resistor in series with the DC decoupling
capacitor at pin 9
FM demodulators
2. VAF2 by a variable resistor in series with the
The intercarrier signal is fed through external ceramic DC decoupling capacitor on pin 10 to the same
band-pass filters which are tuned to the sound carrier voltage as VAF1.
frequencies.
Normally stereo channel separation is adjusted in the
Each limiter-amplifier is AC-coupled into a stereo decoder for the B/G standard.
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.

1996 Nov 20 4
Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821
sound demodulator

Second sound carrier mute transmitted. Therefore, with a mono transmission, there is
no audio output at pin 7. When the signal level at pin 15 is
The output of the second FM demodulator is muted when
greater than typically 1.0 mV (RMS value) mute is
the signal level (signal and/or noise) at pin 15 is less than
switched off.
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
VP supply voltage (pin 14) −0.5 +9.0 V
Vi input signal (pins 1 and 15) −0.5 +5.0 V
ts short-circuit time (each pin except pins 13 and 14 to − 10 s
be tested; one at the time)
Tstg storage temperature
device −25 +125 °C
device in packing −25 +85 °C
Tj junction temperature − 150 °C
Tamb operating ambient temperature 0 70 °C
Ves electrostatic handling for all pins note 1 −500 +500 V
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

Rth 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 = 5 V; Tamb = 25 °C; ∆fi = ±50 kHz; fmod = 1 kHz;
V1, 15 = 10 mV (RMS value); measurements taken in Fig.5; unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supply (pin 14)
VP supply voltage 4.5 5.0 8.8 V
IP supply current 23 30 37 mA
Limiter-amplifier 1
V1 DC input voltage 2.25 2.5 2.75 V
R1 input resistance 480 600 720 Ω
V1(rms) input signal (RMS value) S+N − 150 250 µV
-------------- = 40 dB
N
allowed input signal (RMS value) 200 − − mV
Limiter-amplifier 2
V15 DC input voltage 2.25 2.5 2.75 V
V15(rms) input signal (RMS value) S+N − 150 250 µV
-------------- = 40 dB ; note 1
N
input signal for mute off (RMS value) 0.7 1.0 1.5 mV
allowed input signal (RMS value) 200 − − mV
∆V15 mute hysteresis 8 12 16 dB
R15 input resistance 480 600 720 Ω
PLL FM demodulators VCO1 and VCO2
fVCO1 free-running frequency R11 = 27 kΩ − 5.5 − MHz
fVCO2 free-running frequency R11 = 27 kΩ − 5.7 − MHz
∆ffr negative/positive free-running − − 10 %
frequency spread
D/∆ffr drift of free-running frequencies Tamb = 0 to 70 °C − 500 − kHz
∆ffr(shift) shift of free-running frequencies 4.5 V < VP < 8.8 V − 200 − kHz
∆ffr(ar) negative/positive adjustment range of R11 = 22 kΩ 1 − − MHz
free-running frequencies
R11 adjustment resistance for free-running 15 − 29 kΩ
frequencies (pin 11)
S negative slope of free-running frequency R11 = 22 kΩ − 200 − kHz/kΩ
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

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
VO DC output voltage 1.8 2.1 2.5 V
Vo(rms) output signal (RMS value) 0.4 0.5 0.6 V
clipping level 1.2 − − V
IM AC peak current − − 1.5 mA
IO DC source current − − 2.0 mA
∆Vo/Vo absolute drift of AF output signals Tamb = 0 to 70 °C − 0.7 − dB
∆Vo1/∆Vo2 relative drift of AF output signals Tamb = 0 to 70 °C − 0.2 − dB
∆VAF(1-2) negative/positive difference between 50 µs de-emphasis − 0.3 1.0 dB
output signals
Ro output resistance − 100 − Ω
αcs(ar) adjustment range of channel separation Rs = 1.1 kΩ; 1.5 − − dB
Rpot = 2.2 kΩ
THD total harmonic distortion 50 µs de-emphasis
pin 8 − 0.1 0.3 %
pin 7 − 0.25 0.5 %
αAM AM suppression of AF(1-2) 50 µs de-emphasis; 46 66 − dB
m = 0.3; fAM = 1 kHz
S+N signal plus noise-to-noise ratio 50 µs de-emphasis; 64 68 − dB
-------------- in accordance with
N
“CCIR 468-3”
AFresp LOW-level AF frequency response ∆VAF(1-2) = −3 dB − − 20 Hz
HIGH-level AF frequency response 200 − − kHz
AMres(rms) residual sound carrier signal and − 50 80 mV
harmonics (RMS value)
α8/7 crosstalk attenuation between f = 50 to 12500 Hz 60 70 − dB
AF outputs
RR supply voltage ripple rejection VRR < 200 mV;
fr = 20 Hz to 200 kHz
VP = 5 V 16 20 − dB
VP = 8 V 24 28 − dB
RR supply voltage ripple rejection with fr = 20 Hz to 3 kHz;
improved application for VP = 5 V see Fig.3 and note 2
VP = 4.5 V 18 24 − dB
VP = 4.75 V 21 27 − dB
VP = 5.0 V 24 30 − dB
VP = 5.5 V 21 27 − dB

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.

MHA530
40
handbook, full pagewidth

RR
(dB)
(1)

30

(2)

20

10

0
4 5 6 7 8 VP (V) 9

The curves are typical and valid for ripple frequencies between 50 Hz and 3 kHz.
Conditions: input signal: f = 5.5 MHz, 10 mV (RMS value); ripple on VP = 100 mV (RMS value), fr = 1 kHz;
ripple rejection measurement: unweighted RMS.
(1) Without RC.
(2) With R = 15 kΩ and C = 2.2 µF.

Fig.3 Typical improvement.

1996 Nov 20 8
Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821
sound demodulator

INTERNAL CIRCUITRY

handbook, full pagewidth 16 15 14 13 12 11 10 9

3.5 V

+ AF2 AF1
n.c.
5 5
670 kΩ kΩ
Ω
10 k Ω
3 3
5.5 kΩ kΩ 50 50
kΩ kΩ kΩ

300 µA 3.6 V 2.54 V 2.54 V

3.5 V

2 mA 2 mA

TDA9821
620
Ω

5.5
kΩ 100 Ω 100 Ω
n.c. n.c. n.c. n.c. n.c.

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

TDA9821
sound demodulator

TEST AND APPLICATION INFORMATION

optional stereo
handbook, full pagewidth channel separation
adjustment
intercarrier VP
5.74 MHz
10 µF
Rpot Rs
2.2
nF 2.2 µF 27 kΩ 2.2 kΩ 1.1 kΩ
10 nF
n.c. 2.2 µF 2.2 µF 2.2 µF
600 Ω 15 kΩ

(1) (1)

16 15 14 13 12 11 10 9

TDA9821

1 2 3 4 5 6 7 8 22
nF
2.2 kΩ
600 Ω n.c. n.c. n.c. n.c. n.c.
22
2.2 kΩ nF
2.2
nF

intercarrier VAF2 VAF1 VAF2 VAF1

5.5 MHz
without with 50 µs
de-emphasis de-emphasis
MHA426

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

Fig.5 Test circuit.

1996 Nov 20 10
Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821
sound demodulator

VP
handbook, full pagewidth
(1) 10 µF
R15

2.2 µF 27 kΩ 2.2 µF 2.2 µF

n.c. 5.74 10 nF
MHz

16 15 14 13 12 11 10 9

TDA9821

1 2 3 4 5 6 7 8
MHA427

5.5
n.c. n.c. n.c. n.c. n.c.
MHz
(1) VAF2 VAF1
R1
intercarrier

(1) Resistor value depends on filter.

Fig.6 Application circuit.

1996 Nov 20 11
Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821
sound demodulator

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

D ME
seating plane

A2 A

A1
L

c
Z e w M
b1
(e 1)
b
16 9 MH

pin 1 index
E

1 8

0 5 10 mm
scale

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

UNIT
A A1 A2
b b1 c D (1) E (1) e e1 L ME MH w Z (1)
max. min. max. max.
1.40 0.53 0.32 21.8 6.48 3.9 8.25 9.5
mm 4.7 0.51 3.7 2.54 7.62 0.254 2.2
1.14 0.38 0.23 21.4 6.20 3.4 7.80 8.3
0.055 0.021 0.013 0.86 0.26 0.15 0.32 0.37
inches 0.19 0.020 0.15 0.10 0.30 0.01 0.087
0.045 0.015 0.009 0.84 0.24 0.13 0.31 0.33

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

OUTLINE REFERENCES EUROPEAN

ISSUE DATE
VERSION IEC JEDEC EIAJ PROJECTION

92-10-02
SOT38-1 050G09 MO-001AE
95-01-19

1996 Nov 20 12
Philips Semiconductors Product specification

Dual channel TV FM intercarrier

TDA9821
sound demodulator

SOLDERING The device may be mounted up to the seating plane, but

the temperature of the plastic body must not exceed the
Introduction
specified maximum storage temperature (Tstg max). If the
There is no soldering method that is ideal for all IC printed-circuit board has been pre-heated, forced cooling
packages. Wave soldering is often preferred when may be necessary immediately after soldering to keep the
through-hole and surface mounted components are mixed temperature within the permissible limit.
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for Repairing soldered joints
printed-circuits with high population densities. In these
Apply a low voltage soldering iron (less than 24 V) to the
situations reflow soldering is often used.
lead(s) of the package, below the seating plane or not
This text gives a very brief insight to a complex technology. more than 2 mm above it. If the temperature of the
A more in-depth account of soldering ICs can be found in soldering iron bit is less than 300 °C it may remain in
our “IC Package Databook” (order code 9398 652 90011). contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
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.

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

TDA9821
demodulator

NOTES

1996 Nov 20 14
Philips Semiconductors Product specification

Dual channel TV FM intercarrier sound

TDA9821
demodulator

NOTES

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