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INTEGRATED CIRCUITS
DATA SHEET
TDA1576 FM/IF amplifier/demodulator circuit
Product specification Supersedes data of March 1985 File under Integrated Circuits, IC01 1998 Nov 18
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
FEATURES * Symmetrical limiting IF amplifier * Symmetrical quadrature demodulator * Internal muting circuit * Symmetrical AFC output * Field strength indication output * Detune detector * Reference voltage output * Electronic smoothing of the supply voltage * Standby on/off switching circuit. QUICK REFERENCE DATA fo = 10.7 MHz; f = 22.5 kHz; fm = 400 Hz; QL = 20; 50 s de-emphasis. SYMBOL VP IP ViIF(rms) PARAMETER supply voltage (pin 1) supply current input sensitivity (RMS value) VP = 8.5 V VP = 15 V S+N ------------- = 26 dB N S+N ------------- = 46 dB N VoAF(rms) THD AF output voltage (RMS value) total harmonic distortion single tuned circuit two tuned circuits S+N ------------N signal plus noise-to-noise ratio ViIF > 1 mV (RMS); VP = 8.5 V ViIF > 1 mV (RMS); VP = 15 V AM fi Vi IL Tamb AM suppression AFC offset drift field strength indication permissible indicator load current operating ambient temperature - - - - - - - - -30 0.1 0.02 76 80 50 3 90 - - - - - - - 6 - 2 VP = 8.5 V VP = 15 V CONDITIONS - - - - - - MIN. 7.5 - 16 18 22 8 35 67 135 TYP. - - - - - - - GENERAL DESCRIPTION
TDA1576
The TDA1576 is a monolithic integrated FM/IF amplifier circuit for use in mono and stereo FM-receivers of car radios or home sets.
MAX. 20 V
UNIT mA mA V V V mV mV % % dB dB dB kHz dB mA C
-3 dB before limiting -
+80
ORDERING INFORMATION TYPE NUMBER TDA1576 1998 Nov 18 PACKAGE NAME DIP18 DESCRIPTION plastic dual in-line package; 18 leads (300 mil) 2 VERSION SOT102-1
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1998 Nov 18
VFB1 17 RS ViIF 0.1 F RS 0.1 F VS VFB2 16 0.1 F 25 k 25 k VilF 15 4-STAGE LIMITER/ AMPLIFIER LEVEL DETECTOR
BLOCK DIAGRAM
Philips Semiconductors
FM/IF amplifier/demodulator circuit
+ 0.1 F 10 VP (15 V) 1 8.3 k 5.5 k + AFC voltage - 47 F
33 pF IF1 3
560 pF 33 pF
L(2)
750
IF2 RES2 7 6 15 k 15 k
RES1 4
CPS 2
MUTING
250
QUADRATURE DEMODULATOR 3.7 k 3.7 k 8 VoAF1 9 VoAF2 (3.3 k) VoAF C8-9(1)
TDA1576
1.7 V INDICATOR DRIVER STANDBY SWITCH 4V (6 VBE) 20 k 13 VF 3.6 k A 1 mA (AM) 1 nF (25 k) FM on + (<23 V) reference voltage 14 VF0 5 FMON INTERNAL POWER SUPPLY 5.3 V (185 VT) 12 Vref 220 k
DETUNE DETECTOR G I11 = 0.5 mA 11 Vo(det) 10 Vi(det)
Z8-10 (240 k)
Z9-10 (180 k)
3
field strength indicator level output zero adjustment for of field strength field strength indicator
18 GND
0.47 F 10 k
MGE456
detune voltage
Product specification
TDA1576
(1) For 50 s de-emphasis: C8-9 = 6.8 nF; for stereo operation C8-9 = 56 pF. (2) L = 0.38 H; Qo = 70; QL = 20; adjusted to minimum 2nd harmonic distortion (d2); at Vi = 1 mV; coil: 6 turns CuL (0.25 mm) on coil former KAN (C).
Fig.1 Block diagram and test circuit.
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
PINNING SYMBOL VP CPS IF1 RES1 FMON RES2 IF2 VoAF1 VoAF2 Vi(det) Vo(det) Vref VF VF0 ViIF VFB2 VFB1 GND PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 DESCRIPTION positive supply voltage smoothing capacitor of power supply IF signal to resonant circuit resonant circuit input 1 FM-ON, standby switch resonant circuit input 2 IF signal to resonant circuit AF output voltage 1 (0 phase) AF output voltage 2 (180 phase) detune detector input voltage for external audio reference detune detector output voltage reference voltage output level output for field strength zero adjust voltage for field strength FM/IF input signal voltage DC feedback 2 DC feedback 1 ground (0 V) Fig.2 Pin configuration.
handbook, halfpage
TDA1576
VP CPS IF1 RES1 FMON RES2 IF2 VoAF1 VoAF2
1 2 3 4 5 6 7 8 9
MBH286
18 GND 17 VFB1 16 VFB2 15 VilF
TDA1576
14 VF0 13 VF 12 Vref 11 Vo(det) 10 Vi(det)
1998 Nov 18
4
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP V2 V5, 14 V12 V13 Ptot Tstg Tamb supply voltage (pin 1) voltage on pin 2 voltage on pins 5 and 14 voltage on pin 12 voltage on pin 13 total power dissipation storage temperature operating ambient temperature PARAMETER 0 0 0 0 0 0 -55 -30 MIN. 23 VP 23 7 6 800 +150 +80 MAX.
TDA1576
UNIT V V V V V mW C C
THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER thermal resistance from junction to ambient in free air VALUE 80 UNIT K/W
1998 Nov 18
5
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
CHARACTERISTICS VP = 7.5 to 20 V; fIF = 10.7 MHz; RS = 60 ; fm = 400 Hz with f = 22.5 kHz; 50 s de-emphasis (C8-9 = 6.8 nF); Tamb = 25 C and measurements taken in Fig.1; unless otherwise specified. The demodulator circuit is adjusted at minimum second harmonic distortion for ViIF = 1 mV and a deviation f = 75 kHz. SYMBOL Supply IP supply current without load I12 = I13 = 0; VP = 8.5 V I12 = I13 = 0; VP = 15 V IF amplifier/detector ViIF(rms) input sensitivity (RMS value; pin 15) -3 dB before limiting S+N ------------- = 26 dB N S+N ------------- = 46 dB N VoIF(p-p) R3-7 Z4-6 C4-6 R8, 9 V8, 9 VoAF(rms) THD output voltage at pins 3 and 7 (peak-to-peak value) output resistance input impedance input capacitance output resistance DC output voltage AF output voltage (RMS value) total harmonic distortion single tuned circuit two tuned circuits S+N ------------N signal plus noise-to-noise ratio (pins 8 and 9) QL = 20 - - - B = 250 Hz to 15 kHz; Vi > 1 mV (RMS); VP = 8.5 V B = 250 Hz to 15 kHz; - Vi > 1 mV (RMS); VP = 15 V AM AM suppression ViIF = 10 mV; - FM: 70 Hz; f = 22.5 kHz; AM: 1 kHz; m = 30%; note 1 > 40 dB VP = 100 mV (RMS); C2 = 47 F VP = 8.5 V VP = 15 V 0.5 43 - - 0.1 0.02 76 80 54 - - - - - % % dB dB dB VP = 8.5 V VP = 15 V QL = 20; VP = 8.5 V QL = 20; VP = 15 V Z3, 7 = 10 pF parallel to 1 M - - - - - - - - - - 60 120 22 8 35 680 250 30 1 3.7 5.5 9.8 67 135 30 - - - - - - - - - 75 150 V V V mV k pF k V V mV mV 10 12 16 18 23 25 mA mA PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
ViIF 100 V 8 - 9 ---------------f o
IF input voltage hum suppression at f = 100 Hz AFC tuning slope at QL = 20
- 48 8.5 17
500 - - -
mV dB mV/kHz mV/kHz
1998 Nov 18
6
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
SYMBOL V8-9
PARAMETER AFC offset voltages at QL = 20
CONDITIONS Vi = 1 mV; VP = 8.5 V Vi = 1 mV; VP = 15 V Vi = 30 V to 500 mV (Vref = 1 mV and muting); VP = 8.5 V Vi = 30 V to 500 mV (Vref = 1 mV and muting); VP = 15 V - - -
MIN. - -
TYP.
MAX. 100 200 50
UNIT mV mV mV
25
-
50
100
mV
Field strength output; see Fig.7 Vi V13 indicator sensitivity output voltage I14 = 0 R13 = 3.6 k; I14 = 0 ViIF = 0 ViIF = 250 mV (RMS) I13 V13 available output current reverse voltage at output for FM off V5 > 3.5 V - 3.2 -2 5 - 1.8 0.35 V11/(V10-9) at I11 = 0.25 mA; VP = 15 V V11 = 2.5 V I12 = -1 mA; VP = 8.5 V I12 = -1 mA; VP = 15 V I12 V5 I5 Note 1. Simultaneously measured. available output current Standby switch input voltage for FM on input voltage for FM off input current for FM on - 3.5 - - - - 2 - -100 V V A - - - - - 0 3.6 - - 200 4.1 - - mV V mA V 0.02 - 600 mV
Detuning detector I10 V11 I11 Gv V10-9 Vref quiescent input current output voltage maximum output current voltage gain input offset voltage (pin 10) V10-9 = 0 20 - 0.5 3.3 20 100 5.0 0.65 - - - - - mV nA V mA
Reference voltage reference voltage (pin 12) 5.1 5.3 -2.5 V V mA
1998 Nov 18
7
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
handbook, halfpage
30
MGE459
handbook, halfpage
150
MGE460
IP (mA) 20
Vo (mV) 100
QL = 30 20
typ
10 10 50
0
0 0 10 VP (V) 20
0
10
VP (V)
20
Fig.4 Fig.3 Supply current consumption as a function of VP without load.
AF output voltage as a function of VP; ViIF = 1 mV; f = 15 kHz; fm = 400 Hz; typical values.
handbook, halfpage
1.5
MGE461
QL = 30
THD (%) 1 20
0.5
10
0 0
50
f (kHz)
100
Fig.5
Total harmonic distortion for single tuned circuit; ViIF = 1 mV; fm = 400 Hz; adjusted at minimum 2nd distortion; typical values.
1998 Nov 18
8
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
handbook, full pagewidth
40
MGE462
Vo (dB) 20
f = 75 kHz 40 kHz
0
S+N
15 kHz
-20
-40
-60 N -80 1 10 102 103 104 105 106
Vi (V)
Fig.6
AF output voltage level as a function of IF input voltage; VP = 15 V; fm = 400 Hz; B = 250 Hz to 16 kHz; QL = 20; C8-9 = 6.8 nF.
handbook, full pagewidth
4
MGE463
V13 (V) 3
V14 = 0 V
I14 = 0 V
2
V 14
=1
V
V 14
1
=2
V
V 14
=3
V
0 1 10
102
103
104
105
Vi (V)
106
Fig.7 Voltage at field strength indicator output (proportional to V12); R13 = 3.6 k.
1998 Nov 18
9
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
handbook, halfpage
20 Vo (dB)
MGE464
handbook, halfpage
20
MGE465
Vo (dB)
FM on
0
0
-20
-20
-40
-40
-60
-60 FM off
-80
0
0.2
0.4
0.6
0.8
1.0 V11 (V)
-80
0
1
2
3 V5 (V)
4
Fig.9 Fig.8 Attenuation of output voltage (Vo) as a function of the muting control voltage V11.
FM on/FM off standby switch; attenuation of output voltage (Vo) as a function of control voltage V5.
handbook, full pagewidth
6
MGE466
V11 (V)
5 R8-10 = 0 4 R8-10 = 240 k R9-10 = 180 k 3 (1)
2
1
0 -300
-200
-100
0
+100
+200
f (kHz)
+300
(1) Limited by external preset ( x V12-18).
Fig.10 Detuning detector output voltage; VP = 7.5 to 20 V; QL = 20.
1998 Nov 18
10
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
handbook, full pagewidth
33 pF 3
(1)
39 pF 560 pF
(1)
4 TDA1576 6 39 pF 7 9 8 33 pF
MGE457
560 pF
L1
1 k
L2
390
C8-9 VoAF
Adjustment of the demodulator circuit is obtained with an IF signal which is higher than the 3 dB limiting level; L2 should be short-circuited or detuned; L1 should be adjusted to minimum d2 distortion, and then L2 to minimum d2 distortion. (1) Coil data: L1 = L2 = 0.38 H; Qo = 70; coil former KAN (C).
Fig.11 An example of the TDA1576 when using a demodulator with two tuned circuits.
handbook, full pagewidth
0.3
MGE467
THD (%)
0.2
0.1
-75
-50
-25
0 (fo = 10.7 MHz)
+25
+50
f (kHz)
+75
Fig.12 Total harmonic distortion as a function of detuning; fm = 400 Hz; C8-9 = 6.8 nF; f = 75 kHz; Vo = 330 mV for a frequency deviation f = 75 kHz.
1998 Nov 18
11
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
APPLICATION INFORMATION
TDA1576
handbook, full pagewidth
FM/IF input Vi (RS)
1 mA A VF
R5 4.7 k
R6 220 k Vref detune voltage
C3 0.1 F
C4 0.1 F
C8 C6 1 nF 0.1 F
R3 3.6 k
RS
R4 10 k
C10 0.47 F
18
17
16
15
14
13
12
11
10 R9 180 k
TDA1576
1 VP C1 0.1 F R1 10 C2 47 F C5 33 pF C7 560 pF R2 750 L 0.38 H + C9 33 pF R7 3.3 k R8 3.3 k C11(1) 2 3 4 5 6 7 8 9
R10 240 k
C12
FM on AFC voltage VoAF
MGE458
(1) For mono C11 = 6.8 nF; for stereo C11 = 56 pF.
Fig.13 Application diagram.
1998 Nov 18
12
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
PACKAGE OUTLINE DIP18: plastic dual in-line package; 18 leads (300 mil)
TDA1576
SOT102-1
D seating plane
ME
A2
A
L
A1
c Z e b1 b 18 10 b2 MH wM (e 1)
pin 1 index E
1
9
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 0.044 b1 0.53 0.38 0.021 0.015 b2 1.40 1.14 0.055 0.044 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. 0.85 0.033
Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT102-1 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION
ISSUE DATE 93-10-14 95-01-23
1998 Nov 18
13
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
SOLDERING Introduction to soldering through-hole mount packages This text gives a brief insight to wave, dip and manual soldering. A more in-depth account of soldering ICs can be found in our "Data Handbook IC26; Integrated Circuit Packages" (document order number 9398 652 90011). Wave soldering is the preferred method for mounting of through-hole mount IC packages on a printed-circuit board. Soldering by dipping or by solder wave The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joints for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. Suitability of through-hole mount IC packages for dipping and wave soldering methods SOLDERING METHOD PACKAGE DIPPING DBS, DIP, HDIP, SDIP, SIL Note suitable suitable(1)
TDA1576
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. Manual soldering Apply the soldering iron (24 V or less) to the lead(s) of the package, either 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.
WAVE
1. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board.
1998 Nov 18
14
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TDA1576
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.
1998 Nov 18
15
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For all other countries apply to: Philips Semiconductors, International 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. 1998
SCA60
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
545102/750/02/pp16
Date of release: 1998 Nov 18
Document order number:
9397 750 04822

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