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| TELEFUNKEN Semiconductors TDA4445A/TDA4445B Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator Technology: Bipolar Features D D D D D D Very high input sensitivity Excellent signal to noise ratio Fast averaged AGC IF amplifier can be switched off for VTR mode Output signal stabilized against VS variations Very few external components TDA4445B additional D Targeting bistandard applications (B/G and L) D Alignment free AM demodulator D Low AM distortion Case: DIP16 Figure 1. Block diagram TDA4445A Figure 2. Block diagram TDA4445B Rev. A1: 14.09.1995 1 (8) TDA4445A/TDA4445B Pin Description Pin 1-16 3 8-9 11 12 13 2, 4, 7, 10, 14, 15 Symbol Function IF input If AGC time constant Tuned circuit Supply voltage Sound-IF-output Ground not connected TELEFUNKEN Semiconductors Circuit Description This circuit includes the following functions D Three symmetrical and gain controlled wide band amplifier stages, which are extremely stable by quasi DC coupling without feedback D Averaged AGC with discharge control circuit D AGC voltage generator Quasi parallel sound operation D High phase accuracy of the carrier signal processing, independent from AM TDA4445B additional Pin 5 6 Symbol Function Average capacitor AF output D Linear quadrature demodulator D Sound-IF-amplifier stage with impedance converter AM-Demodulation (TDA4445B only) D Carrier controlled demodulator D Audio frequency stage with impedance converter D Averaged low pass AGC Absolute Maximum Ratings Reference point pin 3, unless otherwise specified Parameters Supply voltage range Supply current External voltages TDA4445A, B TDA4445B only Power dissipation in soldered position Junction temperature Ambient temperature range Storage temperature range Pin 11 Pin 11 Pin 3 Pin 12 Pin 5, 6 Symbol VS IS Vext Value 10 ... 15 70 12 8 8 1 125 -25 to +70 -25 to +125 Unit V mA V Ptot Tj Tamb Tstg W C C C Thermal Resistance Parameters Junction ambient Symbol RthJA Value 60 Unit K/W 2 (8) Rev. A1: 14.09.1995 TELEFUNKEN Semiconductors TDA4445A/TDA4445B Electrical Characteristics VS = 12 V, Tamb = + 25C, reference point pin 13, unless otherwise specified Parameters Supply current DC output voltage DC output current Input impedance Switch off control voltage Switch off control current Test Conditions / Pins V1-16 = 10 mV or V3= 3.5 V Pin 11 V 1-16 = 10 mV, unmodulated Pin 12 V11 = 7.5 V, V3 = 3.5 V Pin 12 Pin 1-16 Pin 1-16 VTR mode Pin 3 VTR mode Pin 3 Symbol IS VO Min. Typ. 60 5.0 Max. Unit mA V Imax R C V I 1.8 1.6 2.0 8 50 10 150 V kW PF V mA Quasi Parallel Sound Operation fPC = 38.9 MHz, fSC1 = 33.4 MHz, fSC2 = 33.16 MHz, PC/SC = 13 dB, PC/SC2 = 20 dB, PC unmodulated (equivalent to sync. peak current) Parameters Minimum input voltage Maximum input voltage Test Conditions / Pins 5.5 MHz output signal -3dB Pin 1-16 5.5 MHz output signal +1 dB Pin 1-16 Symbol vi vi GIF C3 Min. Typ. 50 80 64 0.33 250 110 10 Max. Unit mV mV dB IF AGC range AGC capacitor control time constant, Pin 3 Sound-IF-output voltage V1-16= 10 mV, SC unmodulated 5.5 MHz output voltage Pin 12 vi 5.74 MHz output voltage Signal to noise ratio: measured according to CCIR 468-2 reference signal: v1-16 = 10 mV, FM-frequency deviation = +30 kHz fmod = 1 kHz, measured at audio-output sound IF demodulator U2829B 1. Channel/ 2. Channel Black screen Pin 12 Grid pattern Standard B/G modulated IF signal (residual carrier 10%) mF mV S+N N 62/58 52/49 dB Bistandard Operation Parameters IF AGC range AGC capacitor (control time constant) Test Conditions / Pins Pin 3 Pin 5 Symbol GIF Min. C3 C5 Typ. 64 10 4.7 Max. Unit dB mF Rev. A1: 14.09.1995 3 (8) TDA4445A/TDA4445B Quasi Parallel Sound Operation TELEFUNKEN Semiconductors Parameters Test Conditions / Pins Symbol Min. Typ. fPC = 38.9 MHZ, fSCI = 33.4 MHZ, fSC2 = 33.16 MHz, PC/SC= 13 dB, PC/SC2= 20 dB, PC unmodulated (equivalent to sync. peak current) Minimum input voltage 5.5 MHz output signal -3dB Pin 1-16 vi 50 Maximum input voltage +1dB Pin 1-16 80 vi Sound-IF-output voltage v1-16 = 10 mV, Pin 12 SC unmodulated, 5.5 MHz signal v 250 5.74 MHz signal 110 Max. Unit mV mV mV AM-Demodulation fSC= 39.2 MHz, m = 80 %, fmod = 1 kHz Parameters Minimum input voltage DC output voltage DC output current Distortion AF output voltage Test Conditions / Pin Audio output signal -3dB Pin 1-16 v1-16 = 10 mV, unmodulated Pin 6 V6 = 7.5 V, V3 = 3.5 V Pin 6 v1-16 = 10 mV, m =80 %, fmod = 1 kHz Pin 6 v1-16 = 10 mV, m = 80 %, fmod = 1 kHz Pin 6 Symbol v V Min. Typ. 50 4.1 0.65 1.5 850 3.0 Max. Unit mV V mA % mV Imax d v 4 (8) Rev. A1: 14.09.1995 TELEFUNKEN Semiconductors TDA4445A/TDA4445B Figure 3. Quasi parallel sound operation Rev. A1: 14.09.1995 5 (8) TDA4445A/TDA4445B TELEFUNKEN Semiconductors Figure 4. Bistandard operation 6 (8) Rev. A1: 14.09.1995 TELEFUNKEN Semiconductors TDA4445A/TDA4445B Dimensions in mm Package: DIP16 94 9128 Rev. A1: 14.09.1995 7 (8) TDA4445A/TDA4445B Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to TELEFUNKEN Semiconductors 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423 8 (8) Rev. A1: 14.09.1995 |
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