Overview
The AD7884BQ is a high-speed, 16-bit sampling analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7884/AD7885 series, known for its high throughput rate and robust architecture. The AD7884BQ is designed to operate with a maximum throughput rate of 166 kSPS and features a two-pass flash conversion architecture, ensuring high accuracy and speed. It supports two input ranges: ±5 V and ±3 V, and the conversion process is initiated by the CONVST signal. The device is suitable for various applications requiring high-speed data acquisition and precise analog-to-digital conversion.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Resolution | 16 bits | |
| Throughput Rate | 166 kSPS | |
| Input Ranges | ±5 V, ±3 V | |
| Conversion Architecture | Two-pass flash | |
| Supply Voltage | ±5 V | Analog and digital supplies |
| Reference Voltage | 3 V (VREF+) | |
| Package Types | 40-lead CERDIP, 44-lead PLCC | |
| Temperature Range | -40°C to +85°C | J, A, B Versions |
| Output Structure | 16-bit parallel |
Key Features
- High-Speed Conversion: The AD7884BQ features a high throughput rate of 166 kSPS, making it suitable for applications requiring rapid data acquisition.
- Dual Input Ranges: Supports input ranges of ±5 V and ±3 V, providing flexibility in various signal processing scenarios.
- Two-Pass Flash Architecture: Ensures high accuracy and speed by using a two-phase conversion process.
- Internal Oscillator: The device has its own internal oscillator, which controls the conversion process, simplifying system design.
- Sample-and-Hold Amplifier: Includes an integrated sample-and-hold amplifier to ensure accurate sampling of the analog input signal.
- Standalone Operation: Can operate standalone with an external CONVST pulse, making it versatile for different system configurations.
Applications
- High-Speed Data Acquisition Systems: Ideal for applications requiring rapid and precise conversion of analog signals to digital data.
- Industrial Control Systems: Suitable for use in industrial environments where high accuracy and reliability are crucial.
- Medical Devices: Can be used in medical equipment that requires high-speed and accurate analog-to-digital conversion.
- Aerospace and Defense: Applicable in various aerospace and defense systems where high performance and reliability are essential.
Q & A
- What is the resolution of the AD7884BQ?
The AD7884BQ has a resolution of 16 bits.
- What is the maximum throughput rate of the AD7884BQ?
The maximum throughput rate is 166 kSPS.
- What are the available input ranges for the AD7884BQ?
The device supports input ranges of ±5 V and ±3 V.
- What type of conversion architecture does the AD7884BQ use?
The AD7884BQ uses a two-pass flash conversion architecture.
- What is the supply voltage requirement for the AD7884BQ?
The device requires ±5 V supply voltage for both analog and digital operations.
- What is the reference voltage requirement for the AD7884BQ?
The device requires a reference voltage (VREF+) of 3 V.
- In what package types is the AD7884BQ available?
The AD7884BQ is available in 40-lead CERDIP and 44-lead PLCC packages.
- What is the temperature range for the AD7884BQ?
The temperature range is -40°C to +85°C for J, A, and B versions.
- Can the AD7884BQ operate in standalone mode?
Yes, the AD7884BQ can operate in standalone mode with an external CONVST pulse.
- How does the AD7884BQ handle digital feedthrough from an active bus?
To minimize noise, it is recommended to isolate the ADC data bus from the active processor bus using latches like the 74HC574.
