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MC14559B bảng dữ liệu(PDF) 7 Page - ON Semiconductor |
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MC14559B bảng dữ liệu(HTML) 7 Page - ON Semiconductor |
7 / 9 page MC14549B, MC14559B http://onsemi.com 7 Q7 Q6 Q5 MR SC C Sout MC14549B Q4 Q3 Q2 Q1 Q0 EOC Sout TO DAC Q7 Q6 Q5 SC CSout MC14559B Q4 Q3 Q2 Q1 Q0 EOC TO DAC FF EOC Figure 4. Continuously Cycling 12−Bit ADC Externally Controlled 12−Bit ADC (Figure 5) In this circuit the external pulse starts the first SAR and simultaneously resets the cascaded second SAR. When Q4 of the first SAR goes high, the second SAR starts conversion, and the first one stops conversion. EOC indicates that the parallel data are valid and that the serial output is complete. Updating the output data is started with every external control pulse. Additional Motorola Parts for Successive Approximation ADC Monolithic digital−to−analog converters — The MC1408/1508 converter has eight−bit resolution and is available with 6, 7, and 8−bit accuracy. The amplifier−comparator block — The MC1407/1507 contains a high speed operational amplifier and a high speed comparator with adjustable window. With these two linear parts it is possible to construct SA−ADCs with an accuracy of up to eight bits, using as the register one MC14549B or one MC14559B. An additional CMOS block will be necessary to generate the clock frequency. Additional information on successive approximation ADC is found in Motorola Application Note AN−716. Figure 5. Externally Controlled 12−Bit ADC Q7 Q6 Q5 MR SC C Sout MC14549B Q4 Q3 Q2 Q1 Q0 EOC Sout TO DAC Q7 Q6 Q5 SC CSout MC14559B Q4 Q3 Q2 Q1 Q0 EOC TO DAC FF EOC |
Số phần tương tự - MC14559B |
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Mô tả tương tự - MC14559B |
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