TDA4445A TDA4445B SOUND IF AMPLIFIER . .. .. .. . QUADRATURE INTERCARRIER DEMODULATOR VERY HIGH INPUT SENSITIVITY GOOD SIGNAL TO NOISE RATIO FAST AVERAGING AGC IF AMPLIFIER CAN BE SWITCHED OFF FOR VTR MODE GOOD AM SUPPRESSION OUTPUT SIGNAL STABILIZED AGAINST SUPPLY VOLTAGE VARIATIONS VERY FEW EXTERNAL COMPONENTS DESCRIPTION TDA4445A : Sound IF amplifier, with FM processing for quasi parallel sound system. TDA4445B : Sound IF amplifier, with FM processing and AM demodulator, for multi-standard sound TV appliances. TDA4445B additionnal : Bistandard applications (B/G and L) No adjustment of the AM demodulator Low AM distortion DIP16 (Plastic Package) ORDER CODE : TDA4445A - TDA4445B PIN CONNECTIONS IF INPUT 1 16 IF INPUT NOT TO BE CONNECTED 2 15 NOT TO BE CONNECTED IF AGC TIME CONSTANT 3 14 NOT TO BE CONNECTED NOT TO BE CONNECTED 4 13 GROUND NOT TO BE CONNE CTED FOR TDA4445A AVE RAGING CAP ACITOR FOR TDA4445B 5 12 FM MODULATED SOUND OUTPUT NOT TO BE CONNE CTED FOR TDA4445A A.F. SOUND OUTPUT FOR TDA4445B 6 11 SUPPLY VOLTAGE NOT TO BE CONNECTED 7 10 NOT TO BE CONNECTED REFERENCE L.C. NETWORK 8 9 4445-01.EPS REFERENCE L.C. NETWORK December 1992 1/6 TDA4445A - TDA4445B BLOCK DIAGRAMS TDA4445A 4445-02.EPS / 4445-03.EPS TDA4445B GENERAL DESCRIPTION . .. . This circuit includes the following functions : Three symmetrical and gain controlled wide band amplifier stages, which are extremely stable by quasi DC coupling without feedback. Averaging AGC with discharge control circuit AGC voltage generator Quasi parallel sound operation : High phase accuracy of the carrier signal proc2/6 .. .. . essing, independentfrom AM Linear quadrature demodulator Sound-IF-amplifier stage with impedance converter AM-Demodulation (only TDA4445B) : Carrier controlled demodulator Audio frequency stage with impedance converter Averaging low pass AGC TDA4445A - TDA4445B Parameter Supply Voltage Range Supply Current External Voltages TDA4445A - TDA4445B TDA4445B Pin Pin Pin Pin Pin Pin 11 11 3 12 5 6 Value 15 70 12 8 8 8 1 125 Unit V mA V V V V W °C Vext External Voltages Ptot Tj Power Dissipation Junction Temperature Tamb Ambient Temperature Range 0, + 70 °C Tstg Storage Temperature Range – 25, + 125 °C Value 70 Unit °C/W THERMAL DATA Symbol R th(j-a) Parameter Junction-ambient Thermal Resistance 4445-02.TBL Symbol VCC ICC Vext 4445-01.TBL ABSOLUTE MAXIMUM RATINGS ELECTRICAL OPERATING CHARACTERISTICS Tamb = + 25°C, VCC = 12V (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit 10 12 45 5 15 60 5.75 2 V mA V mA 10 150 kΩ pF V µA DC CHARACTERISTICS VCC ICC VO I R Supply Voltage Supply Current (V3 = 3.5V) DC Output Voltage (V3 = 3.5V) Output DC Current (V3 = 3.5VV11 = 12V) Input Impedance Pin 13 Pin 11 Pin 12 Pin 12 Pins 1-16 C V I Input Impedance Switch off Control Voltage for VTR Mode Switch off Control Current for VTR Mode Pins 1-16 Pin 3 Pin 3 4.25 1 2 2 9 AGC CHARACTERISTICS ∆GIF IF AGC Range 62 dB QUASI PARALLEL SOUND OPERATION (fPC = 38.9MHz, fSC1 = 33.4MHz, fSC2 = 33.16MHz, PC/SC1 = 13dB, PC/SC2 = 20dB, PC unmodulated) VI Min. Input Voltage (5.5MHz - Output Signal - 3dB) Pins 1-16 70 µVeff VI VO Max. Input Voltage (5.5MHz - Output Signal + 1dB) Sound-IF-output Voltage (V1-16 = 20mVeff SC unmodulated) 5.5MHz Output Voltage 5.74MHz Output Voltage Signal to noise ratio measured according to CCIR 468-2 Picture Modulation Ratio 90%, Reference signal (V1-16 = 10mV), FM-frequency deviation30kHz ➝ Out 1 350mVRMS fmod = 1kHz, measured at audio-output Out 2 350mVRMS Pins 1-16 Pin 12 90 mVeff S+N N 200 100 400 300 mVeff mVeff Pin 12 Black Screen (1. Channel/2. Channel) Grid Screen (1. Channel/2. Channel) 55/50 45/40 dB dB AM DEMODULATI0N (TDA4445B only) (fSC = 39.2MHz, m = 80%, fmod = 1kHz) Min. Input Voltage (Audio Output Signal - 3dB) Pins 1-16 Output DC Voltage (V1-16 = 10mVeff unmodulated) Output DC Current (V6 = 7.5V, V3 = 3.5V) Distortion (V1-16 = 10mV, fmod = 1kHz , m = 80%) AF Output Voltage (V1-16 = 100mVeff, m = 50% , fmod = 10kHz) Pin Pin Pin Pin 6 6 6 6 µVeff 70 3.3 0.3 500 2.5 700 4.5 1.2 4 900 V mA % mVeff 3/6 4445-03.TBL VI VO I d VO TDA4445A - TDA4445B 4445-04.TIF TYPICAL APPLICATION Figure 1 : Quasi Parallel Sound Operation 4/6 TDA4445A - TDA4445B 4445-05.TIF TYPICAL APPLICATION Figure 2 : Bistandard Operation (FM stereo sound + AM sound) 5/6 TDA4445A - TDA4445B I b1 L a1 PACKAGE MECHANICAL DATA 16 PINS - PLASTIC DIP b B e E Z e3 D 9 1 8 a1 B b b1 D E e e3 F i L Z Min. 0.51 0.77 Millimeters Typ. Max. 1.65 Min. 0.020 0.030 0.5 0.25 Inches Typ. Max. 0.065 0.020 0.010 20 8.5 2.54 17.78 0.787 0.335 0.100 0.700 7.1 5.1 3.3 0.280 0.201 0.130 1.27 0.050 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 6/6 DIP16.TBL Dimensions PM-DIP16.EPS F 16