Overview
The AD779JDZ is a 14-bit, complete sampling analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This monolithic ADC integrates a sample-hold amplifier (SHA), a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry. It is designed for both dynamic and dc parameter specifications, making it suitable for a wide range of signal processing and measurement applications. The AD779JDZ operates on +5 V and ±12 V supplies and is available in 28-pin plastic DIP and ceramic DIP packages.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | 128 kSPS |
| Input Range | 10 V unipolar or bipolar |
| Full Power Bandwidth | 1 MHz |
| Full Linear Bandwidth | 500 kHz |
| Input Impedance | 10 MΩ |
| Supply Voltage | +5 V and ±12 V |
| Power Dissipation | 560 mW (typ) |
| Package Type | 28-pin plastic DIP and ceramic DIP |
Key Features
- Complete Integration: Combines a high-speed sample-hold amplifier, ADC, 5 V reference, clock, and digital interface on a single chip, minimizing external component requirements.
- High Accuracy: Utilizes a recursive subranging algorithm with error correction and flash converter circuitry for high speed and resolution.
- Low Noise and High Precision: Fabricated on Analog Devices’ BiMOS process, combining low power CMOS logic with high precision, low noise bipolar circuits and laser-trimmed thin-film resistors.
- Analog and Digital Signal Isolation: Analog pins are adjacent to help isolate analog from digital signals, and high input impedance minimizes input trace impedance errors.
Applications
The AD779JDZ is suitable for various applications requiring high precision and dynamic performance, such as signal processing, measurement systems, industrial control, medical devices, and data acquisition systems. Its ability to handle both ac and dc parameters makes it versatile for different types of measurements and signal analysis.
Q & A
- What is the resolution of the AD779JDZ ADC?
The AD779JDZ has a resolution of 14 bits. - What is the sampling rate of the AD779JDZ?
The sampling rate of the AD779JDZ is 128 kSPS. - What are the input range options for the AD779JDZ?
The AD779JDZ has input ranges of 10 V unipolar or bipolar. - What is the full power bandwidth of the AD779JDZ?
The full power bandwidth of the AD779JDZ is 1 MHz. - What is the input impedance of the AD779JDZ?
The input impedance of the AD779JDZ is 10 MΩ. - What are the supply voltage requirements for the AD779JDZ?
The AD779JDZ operates on +5 V and ±12 V supplies. - What is the typical power dissipation of the AD779JDZ?
The typical power dissipation of the AD779JDZ is 560 mW. - In what packages is the AD779JDZ available?
The AD779JDZ is available in 28-pin plastic DIP and ceramic DIP packages. - Why is it important to use well-filtered and regulated power supplies for the AD779JDZ?
Well-filtered and regulated power supplies are crucial to minimize high-frequency noise and ensure optimal performance. Switching power supplies are not recommended due to their tendency to generate spikes that can induce noise in the analog system. - How does the AD779JDZ isolate analog and digital signals?
The AD779JDZ isolates analog and digital signals by placing analog pins adjacent to each other and minimizing input trace impedance errors through its high input impedance.
