Overview
The ADC0803LCV is an 8-bit analog-to-digital converter (ADC) produced by National Semiconductor. It is part of the ADC0801-ADC0805 series, which are CMOS successive approximation A/D converters. These converters are designed to be compatible with microprocessors such as the NSC800 and INS8080A, allowing them to operate seamlessly without the need for additional interfacing logic. The ADC0803LCV features differential analog voltage inputs, which enhance common-mode rejection and allow for offsetting the analog zero input voltage value.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 8 bits |
| Number of Input Channels | 1 |
| Input Type | Differential |
| Data Interface | Parallel |
| Supply Voltage (VCC) | 4.5V to 5.5V (Analog and Digital) |
| Operating Temperature Range | 0°C to 70°C |
| Package/Case | 20-LCCC (8.89x8.89) |
| Mounting Type | Surface Mount |
| Conversion Time | 64 clock cycles (approximately 100 μs with a 640 kHz clock) |
| Power Consumption | Typically 1.1 to 1.8 mA (includes clock and ladder current) |
Key Features
- Successive Approximation Logic: The ADC0803LCV uses successive approximation logic to match the analog difference input voltage to a corresponding tap on the R network, ensuring accurate conversions.
- Differential Analog Voltage Inputs: Allows for increased common-mode rejection and the ability to offset the analog zero input voltage value.
- TRI-STATE Output Latches: Directly drives the data bus, making it appear like memory locations or I/O ports to the microprocessor.
- Adjustable Voltage Reference: The voltage reference input can be adjusted to encode any smaller analog voltage span to the full 8 bits of resolution.
- Free-Running Mode: Can be operated in free-running mode by connecting INTR to the WR input with CS=0.
Applications
- Commercial and Industrial Systems: Suitable for use in various commercial and industrial applications due to its robust design and compatibility with microprocessors.
- Automotive and Telecommunication Systems: Can be used in automotive and telecommunication systems where reliable and accurate analog-to-digital conversion is required.
- Computer and Data Acquisition Systems: Ideal for integration into computer systems and data acquisition setups where precision and reliability are crucial.
- Military and Aerospace: Available in military and aerospace grades, making it suitable for high-reliability applications in these sectors.
Q & A
- What is the resolution of the ADC0803LCV?
The ADC0803LCV has an 8-bit resolution.
- How many input channels does the ADC0803LCV have?
The ADC0803LCV has one input channel.
- What type of input does the ADC0803LCV support?
The ADC0803LCV supports differential analog voltage inputs.
- What is the data interface type of the ADC0803LCV?
The data interface is parallel.
- What is the operating temperature range of the ADC0803LCV?
The operating temperature range is from 0°C to 70°C.
- What is the package type of the ADC0803LCV?
The package type is 20-LCCC (8.89x8.89).
- How does the ADC0803LCV handle common-mode rejection?
The ADC0803LCV enhances common-mode rejection through its differential analog voltage inputs.
- Can the ADC0803LCV be used in free-running mode?
Yes, it can be operated in free-running mode by connecting INTR to the WR input with CS=0.
- What is the typical power consumption of the ADC0803LCV?
The typical power consumption is 1.1 to 1.8 mA (includes clock and ladder current).
- Is the ADC0803LCV compatible with microprocessors?
Yes, it is designed to be compatible with microprocessors such as the NSC800 and INS8080A.
