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Zakładka z wyszukiwarką danych komponentów |
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MC13028AP Arkusz danych(PDF) 4 Page - Motorola, Inc |
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MC13028AP Arkusz danych(HTML) 4 Page - Motorola, Inc |
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4 / 20 page  MC13028A 4 MOTOROLA ANALOG IC DEVICE DATA PIN FUNCTION DESCRIPTION Pin Symbol Internal Equivalent Circuit Description/External Circuit Requirements 4 IFin 10 k 4 Vref IF Amplifier Input Pin 4 is the IF input pin. The typical input impedance at this pin is 10 k. The input should be ac coupled through a 0.01 µF capacitor. 5 Gnd Gnd 5 Substrate Circuit Supply Ground In the PCB layout, the ground pin should be connected to the chassis ground directly. This pin is the internal circuit ground and the silicon substrate ground. 6 SIND VCC 30 k 6 Stereo Indicator Driver This driver circuit is intended to light an LED or other indicator when the decoder receives the proper input signals and switches into the stereo mode. The maximum amount of current that the circuit can sink is 10 mA. A current limiting resistor is applied externally to control LED brightness versus total power supply current. 7 VRef 7 Reference Voltage 1.0 V Regulated Voltage, 1.0 V An electrolytic capacitor used as a bypass filter is recommended from Pin 7 to ground. The capacitor value should be 10 µF. 8 CAPBlend 8 Blend Cap Charging Circuit Pilot Indicator Driver Circuit Blend Algorithm Circuit VCC Blend Capacitor The value of the capacitor on this pin will effect the time constant of the decoder blend function. The recommended value is 10 µF from Pin 8 to ground. The dc level at Pin 8 is internally generated in response to input signal level and signal quality. This pin is a key indicator of the operational state of the IC (see text Functional Description). It is recommended to discharge the blend capacitor externally when changing stations. 9 IPilot Vreg 9 43 k VCC Pilot I Detector Output The Pilot I Detector output requires a 10 µF electrolytic capacitor to ground. The value of this capacitor sets the pilot acquisition time. The dc level at Pin 9 is approximately 1.0 Vdc, unlocked, and 1.1 to 2.4 Vdc in the locked condition. |
Podobny numer części - MC13028AP |
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Podobny opis - MC13028AP |
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