ADC0804 Analog-Digital Converter IC
The ADC0804 is an Analog-to-Digital Converter (ADC) integrated circuit (IC) that converts analog voltage signals into digital output. It's a member of the ADC08xx series of ADCs, which are commonly used in electronic systems to digitize analog signals for further processing by digital components.
Resolution: The ADC0804 is an 8-bit ADC, which means it can convert an analog input voltage into an 8-bit binary digital value. This provides 2^8 (256) possible output values.
Analog Input: The IC typically has a single analog input (IN) where you connect the analog voltage you want to convert into a digital value. The input voltage should be within the specified voltage range for accurate conversion.
Conversion Time: The ADC0804 has a relatively slow conversion time, typically in the microsecond range. The exact conversion time can depend on the clock frequency used and other factors.
Clock Input: To control the conversion process, the ADC0804 requires an external clock input (CLK) provided by an external oscillator or clock source. The frequency of this clock determines the conversion rate.
Digital Outputs: The ADC0804 provides an 8-bit binary output, which appears on eight output pins (D0 to D7). Each pin represents one bit of the digital output.
Start of Conversion (SOC): The SOC pin is used to trigger the start of the conversion process. When a positive edge is applied to the SOC pin, the ADC begins the conversion.
Output Latch: The ADC0804 has an output latch (OE, Output Enable) that allows you to enable or disable the digital output. When OE is high, the output is enabled, and when it's low, the output is in a high-impedance state.
Analog Voltage Reference: The IC often requires an external voltage reference (VREF) to set the conversion range. This reference voltage determines the maximum and minimum values that can be converted. It's typically connected to the IN (+) and IN (-) pins for single-ended conversions.
Applications: The ADC0804 is used in various applications where analog signals need to be converted into digital form, such as data acquisition systems, sensors, and instrumentation.