Overview
The AD7874BR, produced by Analog Devices Inc., is a four-channel simultaneous sampling, 12-bit data acquisition system. This integrated circuit is designed for precise data acquisition applications, featuring a high-speed 12-bit ADC, on-chip reference, 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 the channels, which is crucial in applications such as phased-array sonar and AC motor controllers.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of bits | 12 bits |
| Number of Channels | Simultaneous sampling channels | 4 channels |
| Conversion Time | Time per channel | 2.5 µs/channel |
| Sample Rate | For all four channels | 29 kHz |
| Input Range | Voltage range | ±10 V |
| Supply Voltage | Single supply voltage | +5 V |
| Package Types | Available packages | 28-pin DIP, 28-terminal LCCC, 28-pin SOIC |
| Operating Temperature | Industrial range | −40°C to +85°C |
| Power Consumption | Full power and standby modes | Low power consumption |
Key Features
- Four on-chip track/hold amplifiers allowing simultaneous sampling of four input channels.
- Fast 12-bit ADC with a conversion time of 2.5 µs per channel.
- On-chip reference and on-chip clock.
- Single +5 V supply operation with power-down mode for energy saving.
- High accuracy: ±1 LSB max DNL (Differential Non-Linearity).
- Serial digital interface (SPI, QSPI, MICROWIRE) for easy integration with microcontrollers and DSPs.
- Supports a wide range of sensors and inputs.
- Robust performance in varied environments and designed for long-term stability.
Applications
- Phased-array sonar systems where relative phase information is critical.
- AC motor controllers requiring precise phase information.
- Medical instrumentation for accurate data acquisition.
- Industrial control systems for monitoring and control.
- Environmental monitoring systems for precise data collection.
- Digital signal processing and adaptive filters.
Q & A
- What is the resolution of the AD7874BR?
The AD7874BR has a 12-bit resolution.
- How many channels does the AD7874BR support for simultaneous sampling?
The AD7874BR supports four channels for simultaneous sampling.
- What is the conversion time per channel for the AD7874BR?
The conversion time per channel is 2.5 µs.
- What is the sample rate for all four channels of the AD7874BR?
The sample rate for all four channels is 29 kHz.
- What is the input voltage range of the AD7874BR?
The input voltage range is ±10 V.
- What are the available package types for the AD7874BR?
The AD7874BR is available in 28-pin DIP, 28-terminal LCCC, and 28-pin SOIC packages.
- What is the operating temperature range for the AD7874BR?
The operating temperature range is −40°C to +85°C.
- Does the AD7874BR support power-down mode?
- What type of digital interface does the AD7874BR use?
The AD7874BR uses a serial digital interface (SPI, QSPI, MICROWIRE).
- In what applications is the relative phase information of the AD7874BR particularly important?
The relative phase information is particularly important in applications such as phased-array sonar and AC motor controllers.
