Overview
The AD678JD, produced by Analog Devices Inc., is a 12-bit monolithic analog-to-digital converter (ADC) designed for a wide range of applications. This component integrates a sample-hold amplifier (SHA), a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry on a single chip. The AD678JD is fabricated using Analog Devices' BiMOS process, combining low-power CMOS logic with high-precision, low-noise bipolar circuits. This integration minimizes external component requirements, providing a fully specified sampling A/D function that is unattainable with discrete designs.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | 200 kSPS |
| Analog Input Voltage Range | -5 V to +5 V (bipolar), 0 V to +10 V (unipolar) |
| Full Power Bandwidth | 1 MHz |
| Full Linear Bandwidth | 500 kHz |
| Input Impedance | 10 MΩ |
| Supply Voltages | +5 V, ±12 V |
| Power Dissipation | 560 mW (typ) |
| Package | 28-lead ceramic DIP (CerDIP) |
| Operating Temperature Range | 0°C to +70°C |
Key Features
- Complete Integration: Combines a high-speed sample-hold amplifier, ADC, voltage reference, clock, and digital interface on a single chip, minimizing external component requirements.
- Digital Interface Flexibility: Supports both 16-bit and 8-bit bus interfaces with right or left justification and straight binary or two's complement binary data formats.
- High Accuracy and Speed: Utilizes a recursive subranging algorithm with error correction and flash converter circuitry for high speed and resolution.
- Reliability: Fabricated using Analog Devices' monolithic BiMOS technology, ensuring long-term reliability compared to multichip and hybrid designs.
- Ease of Use: Designed for easy board layout with a choice of single or two read cycle output, eliminating the need for calibration modes or external trimming.
Applications
- Signal Processing: Suitable for applications requiring dynamic parameters such as S/N+D ratio, THD, and IMD.
- Measurement and Control: Fully specified for dc parameters, making it ideal for measurement and control applications.
- Industrial and Military: Available in versions compliant with MIL-STD-883C Class B, making it suitable for military and high-reliability industrial applications.
Q & A
- What is the resolution of the AD678JD?
The AD678JD has a resolution of 12 bits.
- What is the sampling rate of the AD678JD?
The sampling rate of the AD678JD is 200 kSPS.
- What are the supply voltages for the AD678JD?
The AD678JD operates from +5 V and ±12 V supplies.
- What is the input impedance of the AD678JD?
The input impedance of the AD678JD is 10 MΩ.
- What are the available package options for the AD678JD?
The AD678JD is available in 28-lead ceramic DIP (CerDIP) and other package options.
- What is the operating temperature range of the AD678JD?
The operating temperature range of the AD678JD is 0°C to +70°C.
- Does the AD678JD support different digital interface formats?
Yes, the AD678JD supports both 16-bit and 8-bit bus interfaces with right or left justification and different data formats.
- What technology is used in the fabrication of the AD678JD?
The AD678JD is fabricated using Analog Devices' monolithic BiMOS technology.
- Is the AD678JD suitable for military applications?
Yes, the AD678JD is available in versions compliant with MIL-STD-883C Class B, making it suitable for military applications.
- What is the power dissipation of the AD678JD?
The power dissipation of the AD678JD is typically 560 mW.
