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ADC0803 데이터시트(PDF) 10 Page - NXP Semiconductors |
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ADC0803 데이터시트(HTML) 10 Page - NXP Semiconductors |
10 / 18 page Philips Semiconductors Product data ADC0803/0804 CMOS 8-bit A/D converters 2002 Oct 17 10 3-STATE TEST CIRCUITS AND WAVEFORMS (ADC0801-1) tr 90% 50% 10% t0H 10% VCC GND VOH GND RD DATA OUTPUT CL VCC DATA OUTPUT 10 k Ω CL CS RD tr 90% 50% 10% t1H 90% VCC GND VOH GND RD DATA OUTPUT VCC CS RD DATA OUTPUT VCC 20ns 10 pF tOH t1H 10 pF SL00019 10 k Ω Figure 4. 3-State Test Circuits and Waveforms (ADC0801-1) TIMING DIAGRAMS (All timing is measured from the 50% voltage points) START CONVERSION CS WR tWI tW(WR)L ACTUAL INTERNAL STATUS OF THE CONVERTER (LAST DATA WAS READ) (LAST DATA WAS NOT READ) INTR INTR CS RD DATA OUTPUTS INTR RESET tRI tACC t1H, t0H THREE–STATE 1 TO 8 X 1/fCLK ”NOT BUSY” ”BUSY” INTERNAL TC DATA IS VALID IN OUTPUT LATCHES INT ASSERTED 1/2 TCLK NOTE NOTE: Read strobe must occur 8 clock periods (8/fCLK) after assertion of interrupt to guarantee reset of INTR. Output Enable and Reset INTR SL00020 Figure 5. Timing Diagrams |
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