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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M38260ECFS датащи(PDF) 83 Page - Renesas Technology Corp |
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M38260ECFS датащи(HTML) 83 Page - Renesas Technology Corp |
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83 / 91 page  Rev.1.00 Sep 06, 2006 page 83 of 88 REJ03B0181-0100 3826 Group (One Time PROM version) 3.3.10 Notes on D/A converter (1) Pin states at reset The P56/DA1 pin and the P57/ADT/DA2 pin go to high impedance state at reset. (2) Connecting low-impedance device The DAi output pin have no buffer, so connect an external buffer when driving a low-impedance load. (3) Reference voltage input pin VREF •When the P56/DA1 pin and the P57/ADT/DA2 pin are used as DAi output pins, the Vcc level is recommended for the applied voltage to the VREF pin. When the voltage below Vcc level is applied, the D/A conversion accuracy may be worse. •Connect an approximately 1000 pF capacitor across the AVss pin and the VREF pin. Besides, connect the capacitor across the VREF pin and the AVss pin at equal length as close as possible. |
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