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
