Overview
The AD7820LNZ is a high-speed, 8-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed for microprocessor compatibility and utilizes a half-flash conversion technique to achieve rapid conversion times. The AD7820LNZ is particularly suited for applications requiring fast and accurate analog-to-digital conversion, with a conversion time of 1.36 µs. It operates on a single +5 V supply and has an analog input voltage range of 0 V to +5 V, making it versatile for various digital systems.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7820LNZ |
| Package | 20-Lead PDIP |
| Number of Bits | 8 |
| Sampling Rate | 500 ksps |
| Polarity | Unipolar |
| Min Supply Voltage | 4.75 V |
| Supply Voltage | 5 V |
| Max Supply Voltage | 5.25 V |
| Analog Input Voltage Range | 0 V to +5 V |
| Conversion Time | 1.36 µs |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- High-Speed Conversion: The AD7820LNZ uses a half-flash conversion technique, enabling a conversion time of 1.36 µs.
- Microprocessor Compatibility: Designed to interface directly with microprocessors, the AD7820LNZ appears as a memory location or I/O port without the need for external interfacing logic.
- Input Sampling Circuitry: The input is tracked and held by the input sampling circuitry, eliminating the need for an external sample-and-hold for signals with slew rates less than 100 mV/µs.
- Latched, Three-State Output Buffer Circuitry: Allows direct connection to a microprocessor data bus or system input port.
- Non-Three State Overflow Output: Enables cascading of devices to achieve higher resolution.
Applications
The AD7820LNZ is suitable for a variety of applications that require high-speed and accurate analog-to-digital conversion. These include:
- Data Acquisition Systems: Ideal for systems that need to convert analog signals into digital data quickly and accurately.
- Industrial Control Systems: Used in control systems that require rapid and precise conversion of analog signals.
- Medical Devices: Suitable for medical equipment that needs high-speed ADCs for real-time data processing.
- Aerospace and Defense: Used in military and aerospace applications where high reliability and speed are critical.
Q & A
- What is the conversion time of the AD7820LNZ?
The AD7820LNZ has a conversion time of 1.36 µs. - What is the analog input voltage range of the AD7820LNZ?
The analog input voltage range is 0 V to +5 V. - Does the AD7820LNZ require an external sample-and-hold circuit?
No, the AD7820LNZ has built-in input sampling circuitry that eliminates the need for an external sample-and-hold for signals with slew rates less than 100 mV/µs. - What is the supply voltage range for the AD7820LNZ?
The supply voltage range is from 4.75 V to 5.25 V. - Is the AD7820LNZ compatible with microprocessors?
Yes, it is designed for microprocessor compatibility and can appear as a memory location or I/O port. - What is the sampling rate of the AD7820LNZ?
The sampling rate is 500 ksps. - What type of output buffer circuitry does the AD7820LNZ use?
The AD7820LNZ uses latched, three-state output buffer circuitry. - Can the AD7820LNZ be cascaded for higher resolution?
Yes, it has a non-three state overflow output that allows cascading of devices for higher resolution. - What is the operating temperature range of the AD7820LNZ?
The operating temperature range is -40°C to +85°C. - What package type is the AD7820LNZ available in?
The AD7820LNZ is available in a 20-Lead PDIP package.
