Overview
The AD7874ANZ, produced by Analog Devices Inc., is a four-channel simultaneous sampling, 12-bit data acquisition system. This integrated circuit is designed to provide high-speed and precise analog-to-digital conversion, making it ideal for applications where the relative phase information of multiple input channels is crucial.
The AD7874ANZ features a high-speed 12-bit ADC, an on-chip reference, an on-chip clock, and four track/hold amplifiers. This configuration allows for the simultaneous sampling of four input channels, preserving the relative phase information between them. This capability is particularly valuable in applications such as phased-array sonar and AC motor controllers.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12-bit | - | - |
| Number of Channels | 4 | - | - |
| Sample-and-Hold Acquisition Time | 2 µs max | µs | To 0.01% |
| Conversion Time per Channel | 8 µs | µs | - |
| Sample Rate for All Four Channels | 29 kHz | kHz | - |
| Aperture Delay Matching | < 4 ns | ns | Between the four channels |
| Power Supply | +5 V, -5 V | V | VDD = +5 V, VSS = -5 V |
| Package Types | 28-pin PDIP, 28-pin CerDIP, 28-pin SOIC (Wide), 28-terminal LCCC | - | - |
Key Features
- Simultaneous Sampling: The AD7874ANZ allows for the simultaneous sampling of four input channels, preserving the relative phase information between them.
- High-Speed ADC: Features a high-speed 12-bit ADC with a conversion time per channel of 8 µs.
- On-Chip Reference and Clock: Includes an on-chip reference and an on-chip clock, reducing the need for external components.
- Track/Hold Amplifiers: Equipped with four track/hold amplifiers, each with a small aperture delay, ensuring minimal phase errors between channels.
- Fast Microprocessor Interface: The high-speed digital interface allows direct connection to modern 16-bit microprocessors and digital signal processors.
- Dynamic Performance Specifications: Fully specified for dynamic performance parameters including signal-to-noise ratio (SNR), harmonic distortion, and intermodulation distortion.
Applications
- Phased-Array Sonar: Ideal for applications where the relative phase information of multiple input channels is critical.
- AC Motor Controllers: Suitable for controlling AC motors where precise phase information is necessary.
- Adaptive Filters and Spectrum Analysis: Used in signal processing applications that require detailed spectral content analysis of the input signal.
Q & A
- What is the resolution of the AD7874ANZ?
The AD7874ANZ has a 12-bit resolution.
- How many channels does the AD7874ANZ support?
The AD7874ANZ supports four channels.
- What is the sample-and-hold acquisition time of the AD7874ANZ?
The sample-and-hold acquisition time is 2 µs maximum to 0.01%.
- What is the conversion time per channel for the AD7874ANZ?
The conversion time per channel is 8 µs.
- What is the sample rate for all four channels of the AD7874ANZ?
The sample rate for all four channels is 29 kHz.
- What is the aperture delay matching between the four channels of the AD7874ANZ?
The aperture delay matching between the four channels is less than 4 ns.
- What power supply voltages does the AD7874ANZ require?
The AD7874ANZ requires +5 V and -5 V power supply voltages.
- In what packages is the AD7874ANZ available?
The AD7874ANZ is available in 28-pin PDIP, 28-pin CerDIP, 28-pin SOIC (Wide), and 28-terminal LCCC packages.
- What are some typical applications of the AD7874ANZ?
Typical applications include phased-array sonar, AC motor controllers, and signal processing applications such as adaptive filters and spectrum analysis.
- Does the AD7874ANZ have dynamic performance specifications?
Yes, the AD7874ANZ is fully specified for dynamic performance parameters including SNR, harmonic distortion, and intermodulation distortion.
