Overview
The AD7874ARZ is a four-channel simultaneous sampling, 12-bit data acquisition system produced by Analog Devices Inc. This component features a high-speed 12-bit Analog-to-Digital Converter (ADC), an on-chip reference, an on-chip clock, and four track/hold amplifiers. The simultaneous sampling capability of the four input channels preserves the relative phase information, making it ideal for applications where phase accuracy is crucial, such as phased-array sonar and AC motor controllers. The AD7874 is fabricated using Analog Devices' Linear Compatible CMOS (LC2MOS) process, combining precision bipolar circuits with low-power CMOS logic.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 4 |
| Resolution | 12 bits |
| Sampling Rate | 116 ksamples/s |
| Conversion Time | 8 μs/channel |
| Input Range | ±10 V |
| Supply Voltage | ±5 V |
| Operating Temperature | -40°C to 85°C |
| Package Type | 28-pin SOIC |
| Data Interface | Parallel |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Key Features
- Four on-chip track/hold amplifiers allowing simultaneous sampling of four input channels.
- Fast 12-bit ADC with 8 μs conversion time per channel.
- On-chip reference and on-chip clock.
- Small aperture delay and well-matched track/hold circuits to preserve relative phase information.
- Support for multiple AD7874s to sample more than four channels simultaneously.
- Lead-free and RoHS compliant.
Applications
- Phased-array sonar systems.
- AC motor controllers.
- Adaptive filters.
- Digital signal processing.
Q & A
- What is the resolution of the AD7874ARZ?
The AD7874ARZ has a resolution of 12 bits. - How many channels does the AD7874ARZ support?
The AD7874ARZ supports four simultaneous sampling channels. - What is the sampling rate of the AD7874ARZ?
The sampling rate is 116 ksamples/s. - What is the conversion time per channel for the AD7874ARZ?
The conversion time per channel is 8 μs. - What are the supply voltage requirements for the AD7874ARZ?
The supply voltage requirements are ±5 V. - What is the operating temperature range for the AD7874ARZ?
The operating temperature range is -40°C to 85°C. - What type of package is the AD7874ARZ available in?
The AD7874ARZ is available in a 28-pin SOIC package. - Is the AD7874ARZ lead-free and RoHS compliant?
Yes, the AD7874ARZ is lead-free and RoHS compliant. - What are some typical applications of the AD7874ARZ?
Typical applications include phased-array sonar systems, AC motor controllers, adaptive filters, and digital signal processing. - How does the AD7874ARZ preserve relative phase information?
The AD7874ARZ preserves relative phase information through its four on-chip track/hold amplifiers, which sample the input channels simultaneously, and the small and well-matched aperture delay of these amplifiers.
