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SM5301AS 数据表(PDF) 10 Page - Nippon Precision Circuits Inc |
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SM5301AS 数据表(HTML) 10 Page - Nippon Precision Circuits Inc |
10 / 12 page SM5301AS NIPPON PRECISION CIRCUITS INC.—10 TYPICAL APPLICATION CIRCUITS ATSC Digital TV Application (*1) Pins without an input signal, set by NUXSEL, should be left open or tied to GND. (*2) Connect 4 × 0.1µF capacitor between the supply pins close to the IC. (*3) Connect a 47 µF capacitor between the supply pins close to the IC. (*4) GS ×1 are 3-level pins. Connect a capacitor if an error occurs due to external noise. Also, if open-circuit, the internal impedance and external capacitance (C) form an RC network. When power is applied, the open-circuit potential rises with time constant τ = C × 10k (sec). (*5) Printed circuit board supply wiring I If the supply is used for other digital circuits, there is a possibility that noise will be introduced. Accord- ingly, these circuits should be connected to the application’s analog supply. I Ground-plane wiring should be performed, as much as possible, to provide low GND line impedance. I If ground-plane wiring up to the GND pins is difficult, the ground plane should be as close to the IC as possible with a separate wire to each GND pin. Input Capacitor and Cutoff Frequency The capacitor connected to pins RINA/YINA, RINB/YINB, GINA/UINB, GINB/UINB, BINA/VINA, and BINB/VINB forms a highpass filter (HPF) with the internal impedance. The HPF cutoff frequency is given by the following equation. (C: input capacitance, R: signal input impedance = 9.3k Ω) Cut-off control voltage +5V (*2) (*3) BIN/VIN 1.0 µF GIN/UIN 1.0 µF (*1) (*4) GSB1 DISABLE (*1) (*2) 220 µF B/V + 75 Ω 220 µF R/Y + 75 Ω (*4) GSG1 (*4) GSR1 RIN/YIN 1.0 µF SYNC (*1) (*2) (*2) 220 µF G/U + 75 Ω fc = 1 2 πCR |
类似零件编号 - SM5301AS |
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类似说明 - SM5301AS |
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