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INTEGRATED CIRCUITS
DATA SHEET
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 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 VP IP IM Vi(rms) Vo(rms) S+N ------------N 8/7 RR Tamb PARAMETER supply voltage (pin 14) supply current (pin 14) AC peak current (pins 7 and 8) input signal (RMS value) S+N ------------- = 40 dB N in accordance with "CCIR 468-3" f = 50 to 12500 Hz VRR < 200 mV; f = 70 Hz CONDITIONS MIN. 4.5 23 - - 0.4 64 60 16 0 TYP. 5.0 30 - 150 0.5 68 70 20 - GENERAL DESCRIPTION
TDA9821
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.
MAX. 8.8 37 1.5 250 0.6 - - - 70
UNIT V mA mA V V dB dB dB C
output signal (pins 7 and 8; RMS value) fi = 50 kHz signal plus noise-to-noise ratio (pins 7 and 8) crosstalk attenuation supply voltage ripple rejection (pins 7 and 8) operating ambient temperature
ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA9821 DIP16 DESCRIPTION plastic dual in-line package; 16 leads (300 mil); long body VERSION SOT38-1
1996 Nov 20
2
Philips Semiconductors
Product specification
Dual channel TV FM intercarrier sound demodulator
BLOCK DIAGRAM
TDA9821
Rs (1)
handbook, full pagewidth
9 8 V AF1
TDA9821
5.5 MHz (B/G) 1 7-STAGE LIMITER AMPLIFIER 1 VCO 1
5.74 MHz (B/G) intercarrier 15 7-STAGE LIMITER AMPLIFIER 2 VCO 2
SUPPLY mute 13 14 12 11 optional stereo channel separation adjustment VCO ref VP = 4.5 to 8.8 V Rpot 10
7
V AF2
MHA424
(1)
(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 IN1(B/G) n.c. n.c. n.c. n.c. n.c. VAF2 VAF1 C1 C2 VCOref CSTAB GND VP IN2(B/G) n.c. PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DESCRIPTION intercarrier input 1 at 5.5 MHz not connected not connected not connected not connected not connected audio output voltage 2 audio output voltage 1 decoupling capacitor 1 decoupling capacitor 2 VCO reference supply voltage stabilization ground supply voltage intercarrier input 2 not connected Fig.2 Pin configuration.
handbook, halfpage
TDA9821
IN1(B/G) 1 n.c. 2 n.c. 3 n.c. 4
16 n.c. 15 IN2(B/G) 14 VP 13 GND
TDA9821
n.c. 5 n.c. 6 VAF2 7 VAF1 8
MHA531
12 CSTAB 11 VCOref 10 C2 9 C1
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 VAF1 (pin 8) and VAF2 (pin 7) as follows: 1. VAF1 by a resistor in series with the DC decoupling capacitor at pin 9 2. VAF2 by a variable resistor in series with the DC decoupling capacitor on pin 10 to the same voltage as VAF1. 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 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
TDA9821
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.
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP Vi ts Tstg PARAMETER supply voltage (pin 14) input signal (pins 1 and 15) short-circuit time (each pin except pins 13 and 14 to be tested; one at the time) storage temperature device device in packing Tj Tamb Ves junction temperature operating ambient temperature electrostatic handling for all pins note 1 note 2 Notes 1. Equivalent to discharging a 200 pF capacitor via a 0 series resistor. 2. Equivalent to discharging a 100 pF capacitor via a 1.5 k series resistor. THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER thermal resistance from junction to ambient in free air VALUE 74 UNIT K/W -25 -25 - 0 -500 -4000 +125 +85 150 70 +500 +4000 C C C C V V CONDITIONS MIN. -0.5 -0.5 - MAX. +9.0 +5.0 10 V V s UNIT
1996 Nov 20
5
Philips Semiconductors
Product specification
Dual channel TV FM intercarrier 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 Supply (pin 14) VP IP V1 R1 V1(rms) supply voltage supply current 4.5 23 5.0 30 PARAMETER CONDITIONS MIN. TYP.
TDA9821
MAX.
UNIT
8.8 37
V mA
Limiter-amplifier 1 DC input voltage input resistance input signal (RMS value) allowed input signal (RMS value) Limiter-amplifier 2 V15 V15(rms) DC input voltage input signal (RMS value) input signal for mute off (RMS value) allowed input signal (RMS value) V15 R15 fVCO1 fVCO2 ffr D/ffr ffr(shift) ffr(ar) R11 S f1 f2 mute hysteresis input resistance 2.25 - S+N ------------- = 40 dB ; note 1 N 0.7 200 8 480 - - - Tamb = 0 to 70 C 4.5 V < VP < 8.8 V R11 = 22 k - - 1 15 - 1.4 2.0 2.5 150 1.0 - 12 600 2.75 250 1.5 - 16 720 - - 10 - - - 29 - - - V V mV mV dB S+N ------------- = 40 dB N 2.25 480 - 200 2.5 600 150 - 2.75 720 250 - V V mV
PLL FM demodulators VCO1 and VCO2 free-running frequency free-running frequency negative/positive free-running frequency spread drift of free-running frequencies shift of free-running frequencies negative/positive adjustment range of free-running frequencies adjustment resistance for free-running frequencies (pin 11) negative slope of free-running frequency R11 = 22 k adjustment negative/positive catching range of PLLs negative/positive holding range of PLLs R11 = 27 k R11 = 27 k 5.5 5.7 - 500 200 - - 200 1.9 3.0 MHz MHz % kHz kHz MHz k kHz/k MHz MHz
1996 Nov 20
6
Philips Semiconductors
Product specification
Dual channel TV FM intercarrier sound demodulator
SYMBOL PARAMETER CONDITIONS MIN. TYP.
TDA9821
MAX.
UNIT
Output amplifiers AF1 (pin 8) and AF2 (pin 7) and overall performance VO Vo(rms) IM IO Vo/Vo VAF(1-2) Ro cs(ar) THD DC output voltage output signal (RMS value) clipping level AC peak current DC source current absolute drift of AF output signals negative/positive difference between output signals output resistance adjustment range of channel separation total harmonic distortion Rs = 1.1 k; Rpot = 2.2 k 50 s de-emphasis pin 8 pin 7 AM S+N ------------N AFresp AMres(rms) 8/7 RR AM suppression of AF(1-2) signal plus noise-to-noise ratio 50 s de-emphasis; m = 0.3; fAM = 1 kHz 50 s de-emphasis; in accordance with "CCIR 468-3" VAF(1-2) = -3 dB - - 46 64 0.1 0.25 66 68 0.3 0.5 - - % % dB dB Tamb = 0 to 70 C Tamb = 0 to 70 C 50 s de-emphasis 1.8 0.4 1.2 - - - - - - 1.5 2.1 0.5 - - - 0.7 0.2 0.3 100 - 2.5 0.6 - 1.5 2.0 - - 1.0 - - V V V mA mA dB dB dB dB
Vo1/Vo2 relative drift of AF output signals
LOW-level AF frequency response HIGH-level AF frequency response residual sound carrier signal and harmonics (RMS value) crosstalk attenuation between AF outputs supply voltage ripple rejection
- 200 -
- - 50 70
20 - 80 -
Hz kHz mV dB
f = 50 to 12500 Hz VRR < 200 mV; fr = 20 Hz to 200 kHz VP = 5 V VP = 8 V
60
16 24
20 28
- -
dB dB
RR
supply voltage ripple rejection with improved application for VP = 5 V
fr = 20 Hz to 3 kHz; see Fig.3 and note 2 VP = 4.5 V VP = 4.75 V VP = 5.0 V VP = 5.5 V 18 21 24 21 24 27 30 27 - - - - dB dB dB dB
1996 Nov 20
7
Philips Semiconductors
Product specification
Dual channel TV FM intercarrier sound demodulator
Notes
TDA9821
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 k between pin 15 and ground. In this event the input impedance is 490 . 2. Improvement of ripple rejection is possible by connecting series RC between pin 11 and pin 14 (15 k + 2.2 F; 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.
handbook, full pagewidth
40
MHA530
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 k and C = 2.2 F.
Fig.3 Typical improvement.
1996 Nov 20
8
Philips Semiconductors
Product specification
Dual channel TV FM intercarrier sound demodulator
INTERNAL CIRCUITRY
TDA9821
handbook, full pagewidth
16
3.5 V
15
14
13
12
11
AF2
5 k
10
AF1
5 k
9
+
n.c.
670
10 k
3 k 3 k 50 k 50 k
5.5 k
300 A
3.6 V
2.54 V
2.54 V
3.5 V
2 mA 2 mA
TDA9821
620
5.5 k
n.c.
n.c.
n.c.
n.c.
n.c.
100
100
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
TDA9821
handbook, full pagewidth
optional stereo channel separation adjustment intercarrier 5.74 MHz VP 10 F 2.2 nF n.c. 600 2.2 F 15 k
(1)
10 nF
27 k 2.2 F
(1)
Rpot 2.2 k 2.2 F
Rs 1.1 k 2.2 F
16
15
14
13
12
11
10
9
TDA9821
1 600 2.2 nF
2
3
4
5
6
7
8 2.2 k
22 nF
n.c.
n.c.
n.c.
n.c.
n.c. 2.2 k
22 nF
intercarrier 5.5 MHz
VAF2
VAF1
VAF2
VAF1
without de-emphasis
with 50 s 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 sound demodulator
TDA9821
VP
handbook, full pagewidth
(1)
10 F 2.2 F 27 k 2.2 F 2.2 F
R15 n.c. 5.74 MHz 15 14 10 nF
16
13
12
11
10
9
TDA9821
1 5.5 MHz
(1)
2
3
4
5
6
7
8
MHA427
n.c.
n.c.
n.c.
n.c.
n.c. 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 sound demodulator
PACKAGE OUTLINE DIP16: plastic dual in-line package; 16 leads (300 mil); long body
TDA9821
SOT38-1
D seating plane
ME
A2
A
L
A1
c Z e b1 b 16 9 MH wM (e 1)
pin 1 index E
1
8
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 4.7 0.19 A1 min. 0.51 0.020 A2 max. 3.7 0.15 b 1.40 1.14 0.055 0.045 b1 0.53 0.38 0.021 0.015 c 0.32 0.23 0.013 0.009 D (1) 21.8 21.4 0.86 0.84 E (1) 6.48 6.20 0.26 0.24 e 2.54 0.10 e1 7.62 0.30 L 3.9 3.4 0.15 0.13 ME 8.25 7.80 0.32 0.31 MH 9.5 8.3 0.37 0.33 w 0.254 0.01 Z (1) max. 2.2 0.087
Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT38-1 REFERENCES IEC 050G09 JEDEC MO-001AE EIAJ EUROPEAN PROJECTION
ISSUE DATE 92-10-02 95-01-19
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" (order code 9398 652 90011). 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 Preliminary specification Product specification Limiting values
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 (Tstg max). If the 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.
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
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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For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 (c) Philips Electronics N.V. 1996
Internet: http://www.semiconductors.philips.com
SCA52
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
537021/1200/02/pp16
Date of release: 1996 Nov 20
Document order number:
9397 750 01506

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