ADC0804 8-Bit Analog-to-Digital Converter DIP-20 (ADC0804 DIP IC)

ADC0804 8-Bit Analog-to-Digital Converter DIP-20 (ADC0804 DIP IC)

The ADC0804 is a widely used CMOS 8-bit successive approximation analog-to-digital converter. It is designed to interface directly with 8080, 8085, and Z80 microprocessors via a tri-state output latch and can also be easily connected to modern microcontrollers. A standout feature of this IC is its differential analog voltage input, which allows for common-mode rejection and the ability to offset the analog zero input voltage.

This IC is primarily used in digital thermometers, battery monitors, and general-purpose data acquisition. It is a legendary component for Arduino electronics projects in India, serving as the go-to IC for students and hobbyists learning to convert analog sensor data into parallel digital signals for processing.

Key Features

• 8-bit resolution with an error of ±1 LSB
• Differential analog voltage inputs for noise reduction
• Internal clock generator (requires external RC) or external clock input
• Logic-level compatible with TTL and CMOS devices
• Standard 0V to 5V analog input range (with 5V supply)
• Tri-state outputs for direct connection to data buses
• No zero-adjust required in most applications
• On-chip voltage reference option

Specifications

• IC Type = 8-Bit A/D Converter
• Architecture = Successive Approximation
• Resolution = 8 Bits
• Conversion Time = 100 microseconds
• Supply Voltage = 4.5V to 6.3V (5V Typical)
• Package Type = DIP
• Number of Pins = 20
• Mounting Type = Through-Hole
• Operating Temperature = -40 to 85 degrees Celsius

Interfaces

• DB0-DB7 = 8-Bit Parallel Digital Outputs
• VIN(+) = Non-Inverting Analog Input
• VIN(-) = Inverting Analog Input
• VREF/2 = Voltage Reference (Half the Input Range)
• CLK IN = Clock Input
• CLK R = Clock Resistor Connection
• CS = Chip Select (Active Low)
• RD = Read Input (Active Low)
• WR = Write Input (Start Conversion – Active Low)
• INTR = Interrupt (Conversion Complete – Active Low)
• AGND = Analog Ground
• DGND = Digital Ground
• VCC = Positive Power Supply