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1998 Nov 18

Philips Semiconductors

Product specification

FM/IF amplifier/demodulator circuit

TDA1576T

Fig.9 Standby switch.

handbook, halfpage

V3-7

V3-7 (max)

V5 (V)

∆

MEH148

Fig.10 An example of the TDA1576T when using a demodulator with two tuned circuits.

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 d

distortion, and then L2 to minimum d

distortion.

(1) Coil data: L1 = L2 = 0.38

H; Q

= 70; coil former KAN (C).

handbook, full pagewidth

MBK240

(1)

1 k

Ω

560

390

Ω

39 pF

33 pF

C8-9

VoAF

TDA1576T

Содержание TDA1576T

Страница 1: ...DATA SHEET Product specification Supersedes data of February 1991 File under Integrated Circuits IC01 1998 Nov 18 INTEGRATED CIRCUITS TDA1576T FM IF amplifier demodulator circuit ...

Страница 2: ...mono and stereo FM receivers of car radios or home sets QUICK REFERENCE DATA ORDERING INFORMATION SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT VP supply voltage pin 1 7 5 8 5 15 V IP supply current 10 16 23 mA ViIF rms input sensitivity RMS value 3 dB before limiting 14 22 35 µV S N 26 dB 10 µV S N 46 dB 55 µV VoAF rms AF output voltage RMS value 60 67 75 mV THD total harmonic distortion with doub...

Страница 3: ...he Acrobat reader white to force landscape pages to be BLOCK DIAGRAM Fig 1 Block diagram handbook full pagewidth MEH139 DETUNE DETECTOR 0 5 mA 3 7 kΩ 8 3 kΩ 560 pF 33 pF QL 20 fo 10 7 MHz 33 pF 6 8 nF audio outputs 10 Ω 0 1 µF 47 µF 3 7 kΩ V2 MUTE ATTENUATOR QUADRATURE DEMODULATOR RES1 IF1 CPS VP VP V1 V2 RES2 IF2 VoAF1 VAF VAF VoAF2 n c 10 9 8 Vi det 12 n c 11 Vo det 13 Vref 14 VF0 16 ViIF 17 VFB...

Страница 4: ...VoAF2 9 AF output voltage 2 180 phase n c 10 not connected n c 11 not connected Vi det 12 detune detector input voltage for external audio reference Vo det 13 detune detector output voltage Vref 14 reference voltage output VF 15 level output for field strength VF0 16 zero adjust voltage for field strength ViIF 17 FM IF input signal voltage VFB2 18 DC feedback 2 VFB1 19 DC feedback 1 GND 20 ground ...

Страница 5: ...Rating System IEC 134 THERMAL CHARACTERISTICS SYMBOL PARAMETER MIN MAX UNIT VP supply voltage pin 1 0 15 V V2 5 16 voltage on pins 2 5 and 16 0 VP V Ptot total power dissipation 0 450 mW Tstg storage temperature 55 150 C Tamb operating ambient temperature 30 80 C SYMBOL PARAMETER VALUE UNIT Rth j a thermal resistance from junction to ambient in free air 85 K W ...

Страница 6: ...utput current short circuit current 4 6 7 5 mA R14 output resistor I14 1 2 mA 60 150 Ω IF amplifier ViIF rms input sensitivity RMS value pin 17 3 dB before limiting 14 22 35 µV R17 18 input resistance ViIF 200 mV RMS 10 kΩ C17 18 input capacitance ViIF 200 mV RMS 5 pF VoIF p p output voltage at pins 3 and 7 peak to peak value Z3 7 10 pF parallel to 1 MΩ 610 680 750 mV R3 7 output resistance 200 25...

Страница 7: ...ning detector I12 input bias current 20 100 nA Z12 input impedance see Fig 5 6 30 MΩ output voltage ratio for ϕ ϕ V3 7 ϕ V4 6 90 V1 V2 7 5 V R13 14 10 kΩ pins 9 and 12 short circuit see Fig 6 ϕ 9 2 43 kHz Q 20 V9 12 334 mV 0 45 0 5 0 55 V V ϕ 3 5 16 kHz Q 20 V9 12 138 mV 0 75 0 8 0 85 V V ϕ 14 65 kHz Q 20 V9 12 501 mV 0 335 0 345 0 355 V V I13 maximum output current V13 6 V see Fig 7 0 4 0 5 0 6 m...

Страница 8: ...tor 5 8 8 3 10 8 kΩ SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT IF amplifier and demodulator ViIF rms input sensitivity RMS value 3 dB before limiting 14 22 35 µV S N 26 dB 10 µV S N 46 dB 55 µV VoAF rms AF output voltage RMS value 60 67 75 mV VoN noise voltage for ViIF 0 RMS value pins 8 and 9 RS 300 Ω f 250 to 15000 Hz 900 µV weighted noise voltage in accordance with DIN 45405 2 mV S N signal t...

Страница 9: ...tage level on pins 8 and 9 as a function of ViIF at VP 8 5 V fm 1 kHz QL 20 with de emphasis handbook full pagewidth 80 60 40 20 0 20 10 6 10 5 10 4 10 3 10 2 10 1 1 V8 V9 dB Vi 17 rms V MEH166 S N N Fig 4 Field strength output I16 0 handbook full pagewidth 5 0 10 6 10 5 10 4 10 3 10 2 10 1 1 V15 V ViIF rms V MEH143 1 2 3 4 ...

Страница 10: ...ce handbook halfpage MEH144 I12 I12 Ri V9 12 Fig 6 Detuning curve handbook halfpage 1 2 0 8 0 4 0 0 4 0 8 V13 V14 1 2 V9 12 V 1 MEH145 0 5 0 Fig 7 Detuning output handbook halfpage 0 2 4 I13 mA 6 V13 V 1 0 MEH146 0 5 V9 12 1 2 1 0 5 0 Fig 8 Internal audio attenuation handbook halfpage 0 0 1 0 2 αVo dB 0 3 V13 V14 0 MEH147 20 40 60 80 ...

Страница 11: ...dulator with two tuned circuits 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 µH Qo 70 coil former KAN C handbook full pagewidth MBK240 L1 1 1 1 kΩ 560 pF 560 pF L2 390 Ω 39 pF 39 pF 33 ...

Страница 12: ...8 0 o o 0 25 0 1 DIMENSIONS inch dimensions are derived from the original mm dimensions Note 1 Plastic or metal protrusions of 0 15 mm maximum per side are not included 1 1 0 4 SOT163 1 10 20 w M bp detail X Z e 11 1 D y 0 25 075E04 MS 013AC pin 1 index 0 10 0 012 0 004 0 096 0 089 0 019 0 014 0 013 0 009 0 51 0 49 0 30 0 29 0 050 1 4 0 055 0 419 0 394 0 043 0 039 0 035 0 016 0 01 0 25 0 01 0 004 ...

Страница 13: ...s To overcome these problems the double wave soldering method was specifically developed If wave soldering is used the following conditions must be observed for optimal results Use a double wave soldering method comprising a turbulent wave with high upward pressure followed by a smooth laminar wave For packages with leads on two sides and a pitch e larger than or equal to 1 27 mm the footprint lon...

Страница 14: ...kages with a pitch e equal to or smaller than 0 5 mm DEFINITIONS 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...

Страница 15: ...1998 Nov 18 15 Philips Semiconductors Product specification FM IF amplifier demodulator circuit TDA1576T NOTES ...

Страница 16: ...ates 811 East Arques Avenue SUNNYVALE CA 94088 3409 Tel 1 800 234 7381 Uruguay see South America Vietnam see Singapore Yugoslavia PHILIPS Trg N Pasica 5 v 11000 BEOGRAD Tel 381 11 625 344 Fax 381 11 635 777 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 Argentina see...

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