{"product_id":"adc0804-8-bit-analog-to-digital-converter","title":"ADC0804 8-Bit Analog-to-Digital Converter","description":"\u003ch4\u003e\u003cspan\u003eADC0804 8-Bit Analog-to-Digital Converter IC – 20-Pin DIP\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eADC0804\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8-bit successive-approximation Analog-to-Digital Converter (ADC)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e designed to convert an analog voltage signal into an 8-bit digital value that can be processed by a microcontroller, microprocessor, or digital logic circuit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt provides a simple \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8-bit parallel data interface\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, differential analog inputs, an adjustable voltage-reference input, and an onboard clock-generator circuit. The ADC0804 can be interfaced with microprocessors or configured for standalone conversion applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ADC0804\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDevice Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Analog-to-Digital Converter (ADC)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eADC Architecture:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Successive Approximation (SAR)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eResolution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 8-Bit\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eNumber of Input Channels:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAnalog Input Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Differential\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDigital Output:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 8-Bit Parallel\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTypical Supply Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 5V DC\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOperating Supply Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 4.5–6.3V DC depending on device version\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStandard Analog Input Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0–5V with 5V supply\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eConversion Time:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approx. 100µs nominal; datasheet timing depends on clock conditions\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMaximum Sample Rate:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approx. 10kSPS\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTypical Clock Frequency:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 640kHz\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eClock Generator:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e On-Chip, requires external timing components when used in RC-clock configuration\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eVoltage Reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Adjustable through VREF\/2\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eControl Interface:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e CS, RD, WR and INTR\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLogic Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e TTL \/ MOS-Compatible Control Interface\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOutput Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Tri-State Digital Outputs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePackage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 20-Pin DIP for common through-hole version\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eNo Zero Adjustment Required:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e8-Bit Analog-to-Digital Conversion\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe ADC0804 converts an analog input voltage into one of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e256 digital levels\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, represented by an 8-bit binary output from:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e00000000 to 11111111\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith the standard 0–5V input range, each digital step represents approximately:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e5V ÷ 256 ≈ 19.5mV per step\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe effective measurement range can also be adjusted using the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVREF\/2 input\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, allowing better use of the available 8-bit resolution when measuring a smaller analog-voltage range.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDifferential Analog Input\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe ADC0804 provides two analog input pins:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVIN(+) – Positive Analog Input\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eVIN(−) – Negative Analog Input\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor simple single-ended measurements, VIN(−) can typically be referenced to analog ground while the signal is applied to VIN(+).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe differential-input arrangement can also be useful for offsetting the analog zero point and improving common-mode performance in suitable circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eParallel Digital Output\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAfter conversion, the ADC0804 presents the result through \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eeight parallel digital output lines: DB0 to DB7\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis parallel architecture allows all eight bits of the converted value to be read simultaneously.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eControl signals including \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eCS, RD, WR and INTR\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e are used to start conversions, monitor conversion completion, and read the resulting digital data.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eClock Operation\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe ADC0804 includes an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eon-chip clock generator\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, but external timing components are normally used to establish the conversion clock when operating with the internal RC oscillator configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn external clock source can also be used when required by the application.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eConversion speed depends on the selected clock frequency.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIdeal for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eanalog sensor interfacing, voltage measurement, data-acquisition circuits, microprocessor systems, educational electronics, instrumentation, analog-to-digital conversion experiments, industrial control projects, legacy computer interfaces, and digital measurement systems\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is particularly useful when a digital system requires an external ADC with a straightforward \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8-bit parallel interface\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Note\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe ADC0804 is an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8-bit parallel ADC\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, not an I2C or SPI converter. It therefore requires multiple GPIO\/data lines when connected directly to a modern microcontroller.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlso note that \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eADC0804 variants from different manufacturers may have differences in operating temperature, accuracy, package, and electrical specifications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Check the exact manufacturer marking when these parameters are critical.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor modern projects requiring higher resolution or fewer interface pins, an I2C or SPI ADC may be more convenient, but the ADC0804 remains useful for educational, legacy, and parallel-interface applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePackage Includes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e1 × ADC0804 8-Bit Analog-to-Digital Converter IC\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Robot Pi Shop","offers":[{"title":"Default Title","offer_id":41199781806213,"sku":"IC-000069-DVR","price":5.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/5819\/0725\/files\/AD0804.jpg?v=1767558931","url":"https:\/\/robotpishop.com\/products\/adc0804-8-bit-analog-to-digital-converter","provider":"Robot Pi Shop","version":"1.0","type":"link"}