Overview
The AD678BJ is a 12-bit, 200 kSPS complete sampling analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device is part of the AD678 series, which integrates a high-speed sample-hold amplifier (SHA), a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry on a single chip. The AD678BJ is designed for various applications requiring high-speed and high-resolution analog-to-digital conversion, including signal processing and measurement applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | 200 kSPS |
| Input Type | Single Ended |
| Input Range | 10 V (full-scale) |
| 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) |
| Operating Temperature | -40°C to +85°C |
| Package Type | 44-Lead Ceramic JLCC (J-Lead) |
| Reference Type | Internal |
| Data Interface | Parallel |
Key Features
- Complete Integration: Combines a high-speed sample-hold amplifier (SHA), ADC, 5 V reference, clock, and digital interface on a single chip, minimizing external component requirements.
- High-Speed Conversion: Utilizes a recursive subranging algorithm with error correction and flash converter circuitry for high speed and resolution.
- Ease of Use: Designed for easy board layout with a choice of single or two read cycle output, compatible with 16-bit or 8-bit buses.
- Reliability: Fabricated on Analog Devices’ BiMOS process, combining low power CMOS logic with high precision, low noise bipolar circuits, ensuring long-term reliability.
- Upgrade Path: Provides the same pinout as the 14-bit, 128 kSPS AD679 ADC, facilitating upgrades.
Applications
- Signal Processing: Suitable for applications requiring high S/N+D ratio, THD, and IMD specifications, such as audio processing, medical imaging, and industrial control systems.
- Measurement Applications: Ideal for control and measurement applications due to its fully specified dc parameters like INL, gain, and offset.
- Military and Aerospace: Available in versions that comply with MIL-STD-883C Class B, making it suitable for military and aerospace applications.
Q & A
- What is the resolution of the AD678BJ ADC?
The AD678BJ is a 12-bit analog-to-digital converter.
- What is the sampling rate of the AD678BJ?
The AD678BJ has a sampling rate of 200 kSPS.
- What are the supply voltages for the AD678BJ?
The AD678BJ operates from +5 V and ±12 V supplies.
- What is the input impedance of the AD678BJ?
The input impedance is 10 MΩ, allowing direct connection to unbuffered sources without signal degradation.
- What is the operating temperature range of the AD678BJ?
The operating temperature range is -40°C to +85°C.
- What type of package is the AD678BJ available in?
The AD678BJ is available in a 44-Lead Ceramic JLCC (J-Lead) package.
- Does the AD678BJ have an internal reference?
Yes, the AD678BJ has an internal voltage reference.
- What type of data interface does the AD678BJ use?
The AD678BJ uses a parallel data interface.
- Is the AD678BJ RoHS compliant?
No, the AD678BJ contains lead and is not RoHS compliant.
- What are some typical applications for the AD678BJ?
The AD678BJ is suitable for signal processing, measurement applications, and military/aerospace applications.
