Overview
The AD7874AR-REEL7 is a four-channel simultaneous sampling, 12-bit data acquisition system produced by Analog Devices Inc. This integrated circuit is designed to provide high accuracy and precision in various data acquisition applications. It features a high-speed 12-bit ADC, on-chip reference, on-chip clock, and four track/hold amplifiers, allowing for the simultaneous sampling of four input channels. This capability is crucial for preserving the relative phase information between the input channels, making it ideal for applications such as phased-array sonar and AC motor controllers.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Resolution | 12-bit | ||
| Number of Channels | 4 | Simultaneous sampling | |
| Supply Voltage | +5 V | V | Single supply operation |
| Conversion Time per Channel | 8 µs | µs | External clock at 2.5 MHz |
| Sample-and-Hold Acquisition Time | 2 µs | µs | To 0.01% accuracy |
| Aperture Delay Matching | < 4 ns | ns | Between the four channels |
| DNL (Differential Nonlinearity) | ±1 LSB max | LSB | |
| Power Consumption | Low power | Full power and standby modes | |
| Package Type | 28-Lead SOIC (Wide) | Surface mount, reel packaging |
Key Features
- High-speed 12-bit ADC with on-chip reference and on-chip clock.
- Four track/hold amplifiers for simultaneous sampling of four input channels.
- Small and well-matched aperture delay between channels, ensuring accurate phase information.
- Single +5 V supply operation with power-down mode for energy saving.
- Fast conversion time of 8 µs per channel and a sample-and-hold acquisition time of 2 µs.
- Low power consumption, making it ideal for battery-powered applications.
- Serial digital interface (SPI, QSPI, MICROWIRE) for easy integration with microcontrollers and DSPs.
- Supports a wide range of sensors and inputs.
- Meets stringent Analog Devices quality and reliability standards.
Applications
- Industrial automation: Converting analog signals from sensors such as pressure transducers or thermocouples.
- Phased-array sonar: Preserving relative phase information between input channels.
- AC motor controllers: Accurate phase information for motor control.
- Medical instrumentation: High accuracy and precision in medical devices.
- Industrial control systems: Data acquisition and control in industrial environments.
- Environmental monitoring systems: Accurate data acquisition for monitoring environmental parameters.
Q & A
- What is the resolution of the AD7874AR-REEL7?
The AD7874AR-REEL7 has a 12-bit resolution. - How many channels does the AD7874AR-REEL7 support?
The AD7874AR-REEL7 supports four channels with simultaneous sampling capability. - What is the supply voltage for the AD7874AR-REEL7?
The AD7874AR-REEL7 operates on a single +5 V supply. - What is the conversion time per channel for the AD7874AR-REEL7?
The conversion time per channel is 8 µs with an external clock at 2.5 MHz. - What is the sample-and-hold acquisition time for the AD7874AR-REEL7?
The sample-and-hold acquisition time is 2 µs to 0.01% accuracy. - How does the AD7874AR-REEL7 preserve phase information between channels?
The AD7874AR-REEL7 preserves phase information through its four track/hold amplifiers, which sample the input channels simultaneously, and the small and well-matched aperture delay between channels. - What are the power consumption characteristics of the AD7874AR-REEL7?
The AD7874AR-REEL7 has low power consumption and operates in both full power and standby modes. - What type of package does the AD7874AR-REEL7 come in?
The AD7874AR-REEL7 is packaged in a 28-Lead SOIC (Wide) surface mount package, available in reels for automated manufacturing. - What digital interface does the AD7874AR-REEL7 support?
The AD7874AR-REEL7 supports serial digital interfaces such as SPI, QSPI, and MICROWIRE. - What are some typical applications of the AD7874AR-REEL7?
Typical applications include industrial automation, phased-array sonar, AC motor controllers, medical instrumentation, industrial control systems, and environmental monitoring systems.
