Overview
The AD679TD, produced by Analog Devices Inc., is a 14-bit monolithic analog-to-digital converter (ADC) designed for high-speed and high-precision data conversion. This component integrates a sample-and-hold amplifier (SHA), a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry on a single chip. The AD679TD is part of the AD679 series, which is known for its complete integration, minimizing the need for external components. It operates from +5 V and ±12 V supplies and is available in various packages, including 28-lead plastic DIP, ceramic DIP, and 44 J-leaded ceramic surface-mount packages.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | 128 kSPS |
| Input Type | Single-Ended |
| Architecture | Pipeline |
| Minimum Operating Temperature | -55°C |
| Maximum Operating Temperature | +125°C |
| Input Voltage Range | 10 V (unipolar or bipolar) |
| Full Power Bandwidth | 1 MHz |
| Full Linear Bandwidth | 500 kHz |
| Signal-to-Noise Ratio (S/N+D) | 78 dB |
| Input Impedance | 10 MΩ |
| Interface Type | Parallel (8-bit bus interface) |
| Operating Supply Voltage | +5 V, ±12 V |
| Power Dissipation | 560 mW (typical) |
| Package/Case | CDIP-28 SB, among others |
Key Features
- Complete Integration: Combines a high-speed sample-and-hold amplifier, ADC, 5 V reference, clock, and digital interface on a single chip, minimizing external component requirements.
- High-Speed Conversion: 128 kSPS sampling rate with a full power bandwidth of 1 MHz and full linear bandwidth of 500 kHz.
- High Precision: 14-bit resolution with a signal-to-noise ratio (S/N+D) of 78 dB and high input impedance (10 MΩ).
- Flexible Data Format: Supports straight binary data format for unipolar mode and twos complement binary for bipolar mode.
- Ease of Use: Designed for easy board layout with a pinout compatible with 8-bit buses and no need for calibration modes or external trimming.
- Reliability: Utilizes Analog Devices’ monolithic BiMOS technology for long-term reliability.
- MIL-STD-883 Compliant: Available in versions compliant with MIL-STD-883 for military and high-reliability applications.
Applications
- Signal Processing: Ideal for applications requiring high dynamic performance, such as S/N+D ratio, THD, and IMD.
- Measurement and Control: Suitable for control and measurement applications where DC accuracy specifications are crucial.
- Military and Aerospace: Versions compliant with MIL-STD-883 make it suitable for high-reliability and military applications.
- Industrial Automation: Can be used in various industrial automation systems requiring precise and high-speed data conversion).
Q & A
- What is the resolution of the AD679TD?
The AD679TD has a 14-bit resolution).
- What is the sampling rate of the AD679TD?
The sampling rate is 128 kSPS).
- What are the operating temperature ranges for the AD679TD?
The operating temperature ranges from -55°C to +125°C).
- What is the input voltage range for the AD679TD?
The input voltage range is 10 V, which can be either unipolar or bipolar).
- Does the AD679TD have an internal reference and clock?
Yes, the AD679TD includes an on-board reference and clock).
- What is the power dissipation of the AD679TD?
The typical power dissipation is 560 mW).
- Is the AD679TD RoHS compliant?
Yes, the AD679TD is ROHS3 compliant).
- What are the package options for the AD679TD?
The AD679TD is available in 28-lead plastic DIP, ceramic DIP, and 44 J-leaded ceramic surface-mount packages).
- Does the AD679TD support MIL-STD-883 compliance?
Yes, versions of the AD679TD are available that comply with MIL-STD-883).
- How does the AD679TD interface with microprocessors?
The AD679TD has an 8-bit bus interface and supports microprocessor control or external clock asynchronous to the system clock).
