Overview
The AD7874BRZ, produced by Analog Devices Inc., is a four-channel simultaneous sampling, 12-bit data acquisition system. This component integrates 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 such as phased-array sonar and AC motor controllers where phase accuracy is crucial.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Channels | 4 |
| Resolution | 12-bit |
| Sampling Mode | Simultaneous sampling |
| On-chip Components | High-speed ADC, on-chip reference, on-chip clock, four track/hold amplifiers |
| Aperture Delay | Small and specified with minimum and maximum limits |
| Reference Voltage | 3 V ± 10 mV (factory trimmed) |
| Package Options | 28-pin SOIC (Wide), 28-pin PDIP, 28-terminal LCCC, 28-pin CerDIP |
| Dynamic Performance | Specified for SNR, harmonic distortion, intermodulation distortion, and peak harmonics |
Key Features
- Simultaneous sampling of four input channels to preserve relative phase information.
- On-chip temperature-compensated buried Zener reference (3 V ± 10 mV) that can be used for both the ADC and bipolar bias circuitry.
- Small aperture delay of the track/hold amplifiers, ensuring minimal phase errors between signals.
- Reference output/reference input facility to drive multiple AD7874s from the same reference source.
- Full specification for dynamic performance parameters including SNR, harmonic distortion, and intermodulation distortion.
- 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 the relative phase information of multiple channels is critical.
- AC motor controllers requiring accurate phase information for control and monitoring.
- Signal processing applications such as adaptive filters and spectrum analysis.
- Any system requiring simultaneous sampling of multiple analog channels with high accuracy and minimal phase errors.
Q & A
- What is the resolution of the AD7874BRZ?
The AD7874BRZ has a 12-bit resolution.
- How many channels does the AD7874BRZ support?
The AD7874BRZ supports four channels.
- What is the sampling mode of the AD7874BRZ?
The AD7874BRZ supports simultaneous sampling of all four channels.
- What on-chip components does the AD7874BRZ include?
The AD7874BRZ includes a high-speed ADC, on-chip reference, on-chip clock, and four track/hold amplifiers.
- What is the reference voltage of the AD7874BRZ?
The reference voltage is 3 V ± 10 mV, which is factory trimmed.
- What are the package options for the AD7874BRZ?
The AD7874BRZ is available in 28-pin SOIC (Wide), 28-pin PDIP, 28-terminal LCCC, and 28-pin CerDIP packages.
- What dynamic performance parameters are specified for the AD7874BRZ?
The AD7874BRZ is specified for SNR, harmonic distortion, intermodulation distortion, and peak harmonics.
- What applications is the AD7874BRZ ideal for?
The AD7874BRZ is ideal for phased-array sonar, AC motor controllers, and other signal processing applications requiring simultaneous sampling with high accuracy.
- How does the AD7874BRZ ensure minimal phase errors between channels?
The AD7874BRZ ensures minimal phase errors through its small aperture delay of the track/hold amplifiers and the ability to drive multiple devices from the same reference source.
- What process is the AD7874BRZ fabricated in?
The AD7874BRZ is fabricated in Analog Devices' Linear Compatible CMOS (LC2MOS) process.
