Overview
The AD678AD is a 12-bit monolithic analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed to be a complete, multipurpose ADC, integrating a sample-hold amplifier (SHA), a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry on a single chip. The AD678AD is suitable for various applications requiring high-speed and high-precision analog-to-digital conversion, including signal processing and measurement applications. It operates from +5 V and ±12 V supplies and is available in several package options, including 28-lead plastic DIP, ceramic DIP, and 44-lead J-leaded ceramic surface mount packages.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | 200 kSPS |
| Full Power Bandwidth | 1 MHz |
| Full Linear Bandwidth | 500 kHz |
| Signal-to-Noise Ratio (S/N+D) | 72 dB (K, B, T Grades) |
| Data Format | Straight Binary (Unipolar), Twos Complement Binary (Bipolar) |
| Input Impedance | 10 MΩ |
| Analog Input Voltage Range | ±10 V |
| Supply Voltage | +5 V, ±12 V |
| Operating Temperature Range | -40°C to +85°C |
| Package Options | 28-lead plastic DIP, ceramic DIP, 44-lead J-leaded ceramic surface mount |
Key Features
- Complete integration of sample-hold amplifier, ADC, voltage reference, and clock generation on a single chip.
- High-speed conversion with 200 kSPS sampling rate and 1 MHz full power bandwidth.
- High precision with 72 dB S/N+D ratio and low noise performance.
- Microprocessor-compatible bus interface with 8-bit or 16-bit bus options.
- Internal voltage reference and clock generation.
- High input impedance (10 MΩ) allowing direct connection to unbuffered sources.
- MIL-STD-883 compliant versions available for military applications).
Applications
- Signal processing applications requiring high-speed and high-precision analog-to-digital conversion.
- Measurement applications where accurate dc parameters are crucial.
- Industrial and commercial systems needing reliable and robust ADCs.
- Military applications due to MIL-STD-883 compliance).
Q & A
- What is the sampling rate of the AD678AD? The AD678AD has a sampling rate of 200 kSPS.
- What are the supply voltage requirements for the AD678AD? The AD678AD operates from +5 V and ±12 V supplies.
- What is the input impedance of the AD678AD? The input impedance is 10 MΩ).
- What are the package options available for the AD678AD? The AD678AD is available in 28-lead plastic DIP, ceramic DIP, and 44-lead J-leaded ceramic surface mount packages).
- Is the AD678AD compliant with military standards? Yes, the AD678AD has versions that are MIL-STD-883 compliant).
- What is the full power bandwidth of the AD678AD? The full power bandwidth is 1 MHz).
- What data formats does the AD678AD support? The AD678AD supports straight binary for unipolar mode and twos complement binary for bipolar mode).
- What is the operating temperature range of the AD678AD? The operating temperature range is -40°C to +85°C).
- Does the AD678AD have an internal voltage reference and clock generation? Yes, it does).
- What is the signal-to-noise ratio (S/N+D) of the AD678AD? The S/N+D ratio is 72 dB for K, B, and T grades).
