Overview
The AD7874ARZ-REEL7, 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 AD7874 includes a high-speed 12-bit ADC, an on-chip reference, an on-chip clock, and four track/hold amplifiers. This configuration allows for simultaneous sampling of all four input channels, ensuring accurate phase information and minimizing phase errors between signals.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Number of Channels | 4 | - | Simultaneous sampling |
| Resolution | 12-bit | - | - |
| Conversion Time | 8 μs/channel | μs | - |
| Sample Rate | 29 kHz | kHz | For all four channels |
| Input Range | ±10 V | V | - |
| Supply Voltage | ±5 V | V | - |
| Package Types | 28-pin SOIC (Wide), 28-pin PDIP, 28-terminal LCCC | - | - |
| Aperture Delay | Small and well matched | - | Across the four track/holds |
| Clock Frequency | Up to 2.5 MHz | MHz | External clock |
Key Features
- Four on-chip track/hold amplifiers allowing simultaneous sampling of four input channels.
- High-speed 12-bit ADC with an 8 μs conversion time per channel.
- On-chip reference and on-chip clock.
- Reference output/reference input facility for driving multiple AD7874s from the same reference source.
- Dynamic performance parameters include distortion and signal-to-noise ratio specifications.
- Fabricated in Analog Devices' Linear Compatible CMOS (LC2MOS) process, combining precision bipolar circuits with low-power CMOS logic.
Applications
- Phased-array sonar systems where preserving relative phase information is critical.
- AC motor controllers requiring precise phase information.
- Adaptive filters and digital signal processing applications.
Q & A
- What is the resolution of the AD7874ARZ-REEL7? The AD7874ARZ-REEL7 has a 12-bit resolution.
- How many channels does the AD7874ARZ-REEL7 support? It supports four channels with simultaneous sampling.
- What is the conversion time per channel for the AD7874ARZ-REEL7? The conversion time per channel is 8 μs.
- What are the typical applications of the AD7874ARZ-REEL7? Typical applications include phased-array sonar, AC motor controllers, adaptive filters, and digital signal processing.
- What is the input voltage range for the AD7874ARZ-REEL7? The input voltage range is ±10 V.
- What are the available package types for the AD7874ARZ-REEL7? The available package types include 28-pin SOIC (Wide), 28-pin PDIP, and 28-terminal LCCC.
- How does the AD7874ARZ-REEL7 preserve relative phase information? It preserves relative phase information through the use of four on-chip track/hold amplifiers that sample the input channels simultaneously.
- Can multiple AD7874s be driven from the same reference source? Yes, the AD7874 includes a reference output/reference input facility that allows multiple devices to be driven from the same reference source.
- What is the maximum clock frequency for the AD7874ARZ-REEL7? The maximum clock frequency is up to 2.5 MHz for an external clock.
- What process is the AD7874ARZ-REEL7 fabricated in? It is fabricated in Analog Devices' Linear Compatible CMOS (LC2MOS) process.
