Overview
The AD7820KRZ is a high-speed, 8-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This microprocessor-compatible ADC utilizes a half-flash conversion technique, enabling a conversion time of 1.36 µs. It features a single +5 V supply and an analog input voltage range of 0 V to +5 V. The AD7820KRZ is designed for ease of integration with microprocessors, appearing as a memory location or I/O port without the need for external interfacing logic.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 8 bits |
| Conversion Time | 1.36 µs |
| Analog Input Voltage Range | 0 V to +5 V |
| Supply Voltage | +5 V |
| Package Type | 20-Lead SOIC (Wide) |
| Operating Temperature Range | -40°C to +85°C |
| Input Slew Rate | Less than 100 mV/µs |
| Digital Output | Latched, three-state output buffer circuitry |
Key Features
- High-speed conversion using half-flash technique with 31 comparators and a most significant 4-bit ADC and a least significant 4-bit ADC.
- Input sampling circuitry eliminates the need for an external sample-and-hold for signals with slew rates less than 100 mV/µs.
- Microprocessor-compatible design with direct connection to a microprocessor data bus or system input port.
- Non-three state overflow output for cascading devices to achieve higher resolution.
- Latched, three-state output buffer circuitry.
Applications
The AD7820KRZ is suitable for various high-speed data acquisition applications, including:
- Industrial control systems
- Medical devices
- Aerospace and defense systems
- Automotive systems
- High-speed data logging and monitoring systems.
Q & A
- What is the resolution of the AD7820KRZ?
The AD7820KRZ has an 8-bit resolution. - What is the conversion time of the AD7820KRZ?
The conversion time is 1.36 µs. - What is the analog input voltage range of the AD7820KRZ?
The analog input voltage range is 0 V to +5 V. - What is the supply voltage requirement for the AD7820KRZ?
The supply voltage is +5 V. - What type of package does the AD7820KRZ come in?
The AD7820KRZ comes in a 20-Lead SOIC (Wide) package. - What is the operating temperature range of the AD7820KRZ?
The operating temperature range is -40°C to +85°C. - Does the AD7820KRZ require an external sample-and-hold circuit?
No, the input sampling circuitry eliminates the need for an external sample-and-hold for signals with slew rates less than 100 mV/µs. - How does the AD7820KRZ interface with microprocessors?
The AD7820KRZ is designed to appear as a memory location or I/O port and can be directly connected to a microprocessor data bus or system input port. - What type of digital output does the AD7820KRZ have?
The AD7820KRZ has latched, three-state output buffer circuitry. - Can the AD7820KRZ be cascaded for higher resolution?
Yes, the non-three state overflow output allows for cascading devices to achieve higher resolution.
