Overview
The AD779KD is a 14-bit, single-channel, sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD779 series, which is known for its complete integration of a high-speed sample-hold amplifier (SHA), ADC, voltage reference, clock, and digital interface on a single chip. This integration minimizes the need for external components, providing a fully specified sampling A/D function that is not easily achievable with discrete designs. The AD779KD operates from +5 V and ±12 V supplies and dissipates 560 mW (typical). It is available in a 28-pin ceramic DIP package and is specified for both AC and DC parameters, making it suitable for various applications including signal processing and control measurements.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | 128 kSPS |
| Input Range | 10 V (unipolar or bipolar) |
| Supply Voltage | +5 V and ±12 V |
| Power Dissipation | 560 mW (typical) |
| Operating Temperature | 0°C to +70°C (AD779KD) |
| Package Type | 28-Pin Ceramic DIP |
| Data Format | Twos Complement (bipolar mode), Straight Binary (unipolar mode) |
| Bus Interface | 16-Bit Bus Interface |
Key Features
- Complete Integration: Combines a high-speed sample-hold amplifier, ADC, voltage reference, clock, and digital interface on a single chip, reducing the need for external components.
- Ease of Use: Designed for easy board layout with a single cycle read output compatible with 16-bit buses. Factory trimming eliminates the need for calibration modes or external trimming.
- Reliability: Utilizes Analog Devices’ monolithic BiMOS technology, ensuring long-term reliability compared to multichip and hybrid designs.
- Compliance: Available in versions compliant with MIL-STD-883.
- Input Impedance: 10 MΩ input impedance, and the full-scale input range accepts the majority of signal voltages without the need for voltage divider networks.
Applications
The AD779KD is suitable for a variety of applications, including signal processing and control measurements. Its AC specifications such as S/N+D ratio, THD, and IMD make it valuable in signal processing applications. The DC accuracy specifications, including INL, gain, and offset, are important in control and measurement applications. Additionally, its compliance with MIL-STD-883 makes it suitable for military and high-reliability applications.
Q & A
- What is the resolution of the AD779KD?
The AD779KD has a resolution of 14 bits. - What is the sampling rate of the AD779KD?
The sampling rate of the AD779KD is 128 kSPS. - What are the supply voltages for the AD779KD?
The AD779KD operates from +5 V and ±12 V supplies. - What is the typical power dissipation of the AD779KD?
The typical power dissipation of the AD779KD is 560 mW. - What is the operating temperature range for the AD779KD?
The operating temperature range for the AD779KD is 0°C to +70°C. - What type of package is the AD779KD available in?
The AD779KD is available in a 28-Pin Ceramic DIP package. - Is the AD779KD still in production?
No, the AD779KD is obsolete and no longer manufactured. Available substitutes include the AD779JNZ. - What data formats does the AD779KD support?
The AD779KD supports Twos Complement data format in bipolar mode and Straight Binary data format in unipolar mode. - What is the input impedance of the AD779KD?
The input impedance of the AD779KD is 10 MΩ. - Is the AD779KD compliant with any military standards?
Yes, the AD779KD is available in versions compliant with MIL-STD-883.
