Overview
The AD7874AQ, produced by Analog Devices Inc., is a four-channel simultaneous sampling, 12-bit data acquisition system. This component is designed to preserve the relative phase information of the four input channels, making it ideal for applications where such precision is crucial, such as phased-array sonar and AC motor controllers. The AD7874AQ features a high-speed 12-bit ADC, on-chip reference, on-chip clock, and four track/hold amplifiers, allowing simultaneous sampling of all four input channels.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Resolution | 12-bit |
| Conversion Time per Channel | 8 μs |
| Sample Rate for All Four Channels | 29 kHz |
| Analog Input Range | ±10 V |
| Supply Voltage | ±5 V |
| Package Types | 28-pin PDIP, 28-pin CerDIP, 28-pin SOIC (Wide), 28-terminal LCCC |
| Operating Temperature Range | –40°C to +85°C |
| Aperture Delay Matching | < 4 ns |
Key Features
- Simultaneous sampling of four input channels using four on-chip track/hold amplifiers.
- Fast 12-bit ADC with 8 μs conversion time per channel.
- Tight aperture delay matching to preserve relative phase information.
- On-chip reference and on-chip clock.
- High-speed microprocessor interface compatible with modern 16-bit microprocessors and digital signal processors.
- Reference output/reference input facility for multiple device synchronization.
Applications
- Phased-array sonar systems.
- AC motor controllers.
- Adaptive filters.
- Digital signal processing.
Q & A
- What is the resolution of the AD7874AQ?
The AD7874AQ has a resolution of 12 bits. - How many channels does the AD7874AQ support?
The AD7874AQ supports four channels. - What is the conversion time per channel for the AD7874AQ?
The conversion time per channel is 8 μs. - What is the sample rate for all four channels of the AD7874AQ?
The sample rate for all four channels is 29 kHz. - What is the analog input range of the AD7874AQ?
The analog input range is ±10 V. - What are the package types available for the AD7874AQ?
The AD7874AQ is available in 28-pin PDIP, 28-pin CerDIP, 28-pin SOIC (Wide), and 28-terminal LCCC packages. - What is the operating temperature range of the AD7874AQ?
The operating temperature range is –40°C to +85°C. - How does the AD7874AQ preserve relative phase information?
The AD7874AQ preserves relative phase information through tight aperture delay matching between the four track/hold amplifiers. - Is the AD7874AQ compatible with modern microprocessors?
Yes, the AD7874AQ has a high-speed microprocessor interface compatible with modern 16-bit microprocessors and digital signal processors. - Can multiple AD7874AQ devices be synchronized?
Yes, multiple AD7874AQ devices can be synchronized using the reference output/reference input facility.
