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TDA6060XS Scheda tecnica(PDF) 10 Page - Infineon Technologies AG |
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TDA6060XS Scheda tecnica(HTML) 10 Page - Infineon Technologies AG |
10 / 28 page 7'$;6 High Frequency Products TV - Video Page 10 0XOWLSOH,&&RQILJXUDWLRQZLWK2QH&U\VWDO5HIHUHQFH To reduce system costs, a single crystal resonator can be shared among multiple ICs due to the four bus address selectable option on the TDA6060XS. A buffered external reference source from another IC (i.e. PLL , IF processor, microprocessor, etc) or crystal oscillator may be connected to drive the TDA6060XS Qx reference inputs (pin 14) via series resistors and capacitors as shown in Figure 7. The series resistors and capacitors are needed to current drive the crystal inputs. The capacitor is used as a DC block and its value is dependent on reference crystal and oscillator impedance characteristics. The 1k resistor is needed to eliminate the possibility of parastic oscillations by the crystal oscillator and its value was determined by the crystal oscillator‘s specified minimum impedance (-900 Ohm). The required Qx voltage input range is 200 mVpp to 2Vpp, respectively. )LJXUH ±0XOWLSOH ,& &RQILJXUDWLRQZLWKD 6LQJOH &U\VWDO5HIHUHQFH RU([WHUQDO2VFLOODWRU5HIHUHQFH 6RXUFH Qx Q Qx Q 1 1 * Up to Four TDA6060XS ICs TDA6060XS Reference IC Q TDA6060XS 1 NC 47 pF 1k 1 NC 47 pF 1k * Or Other Signal Source Ref Ref. Frequency = 4 MHz |
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