adc0804_中文资料（Adc0804_ Chinese information）.docVIP

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adc0804_中文资料（Adc0804_ Chinese information）.doc

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adc0804_中文资料（Adc0804_ Chinese information）

adc0804_中文资料（Adc0804_ Chinese information） /CS chip select signal. /CS chip select signal. Analog / digital converter (related knowledge) The basic principle of A/D converter ----ADC0804 1, what is called The A/D converter is analog Digital converter (digital converter) ADC) converts analog signals into digital signals. The signal input is OK Is the output of the sensor or converter, and ADC digital signals may also be provided to microprocessors for wide application. 2, Specification and pin diagram of ADC0804 8 COMS, in turn, approximate type A/D converter . Three state lock output Access time : 135US Resolving power： 8 Conversion time: 100US Total error: plus minus 1LSB Operating temperature: ADC0804LCN---0~70 degrees Pin drawings and instructions are shown in figures One /RD control output signal of external read conversion result. /RD HI, DB0~DB7 handles high impedance: /RD for LO, digital data will be Output. /WR: the control input used to start the transition, which is equivalent to the start of the ADC conversion (/CS=0), when the /WR is converted from HI to LO, the converter is cleared Except: when /WR returns to HI, the conversion begins formally. CLK IN, CLK R: the clock input or the oscillator is not C (R), the frequency is limited to 100KHZ~1460KHZ, and if the RC circuit is used, the The oscillation frequency is 1/ (1.1RC) /INTR: interrupt request signal output Low altitude action VIN (+) VIN (-): differential analog voltage input. Input single ended positive voltage, VIN (-) ground: differential input, Join directly VIN (+), VIN (-) AGND, DGND: analog signals, and grounding of digital signals VREF: auxiliary reference voltage . DB0~DB7:8 bit digital output . VCC: power supply as well as the reference voltage of the circuit . Reference dragon Suite 0804 diagram: Sixteen binary binary code and full scale relative voltage VREF=2.560 Volts High four bit byte, low four bit byte, high four bit, low voltage, four bit voltage F 1111, 15/16, 15/256, 4.800, 0.30