Overview
The AD7731BRZ-REEL7, manufactured by Analog Devices Inc., is a high-performance 24-bit sigma-delta analog-to-digital converter (ADC). This component is designed to serve as a complete analog front-end for various applications, particularly in process control. It features a proprietary programmable gain front end, allowing it to accept a wide range of input signal levels directly from transducers. The device operates from a single +5 V supply and is available in a 24-lead SOIC package.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Part Number | AD7731BRZ-REEL7 | ||
| Manufacturer | Analog Devices Inc. | ||
| Package | 24-SOIC (0.295, 7.50mm Width) | ||
| Number of Inputs | 3, 5 (configurable as pseudo-differential) | ||
| Number of Bits | 24 | ||
| Sampling Rate | Up to 6.4 kHz | Programmable output rates | |
| Polarity | Bipolar, Unipolar | Seven unipolar and seven bipolar ranges | |
| Interface | SPI (Serial Peripheral Interface) | Compatible with microcontrollers and DSPs | |
| Supply Voltage | 2.7 V to 5 V | V | Single supply operation |
| Operating Temperature | -40°C to +85°C | °C |
Key Features
- 24-Bit Sigma-Delta ADC: High-resolution conversion with peak-to-peak resolution of up to 16 bits at an 800 Hz output rate.
- Programmable Gain Front End: Allows the device to accept a wide range of input signal levels directly from transducers.
- Programmable Output Rates: Up to 6.4 kHz, adjustable to suit different application requirements.
- Multiple Input Configurations: Three buffered differential programmable gain analog inputs, configurable as five pseudo-differential inputs.
- Differential Reference Input: Supports various reference input ranges.
- Low Drift: Offset drift of less than 5 nV/°C and gain drift of less than 2 ppm/°C.
- Self-Calibration and System Calibration: Options for self-calibration and system calibration to ensure high accuracy.
- Serial Interface: SPI interface compatible with microcontrollers and digital signal processors.
Applications
The AD7731BRZ-REEL7 is particularly suited for process control applications, including but not limited to:
- Industrial automation systems
- Process monitoring and control systems
- Medical devices requiring high precision ADCs
- Test and measurement equipment
- Automotive and aerospace applications where high accuracy and reliability are critical
Q & A
- What is the resolution of the AD7731BRZ-REEL7?
The AD7731BRZ-REEL7 is a 24-bit sigma-delta ADC, achieving up to 16 bits peak-to-peak resolution at an 800 Hz output rate.
- What are the input configurations available for this ADC?
The device has three buffered differential programmable gain analog inputs, which can be configured as five pseudo-differential inputs.
- What is the operating supply voltage range for the AD7731BRZ-REEL7?
The device operates from a single supply voltage of 2.7 V to 5 V.
- What types of interfaces does the AD7731BRZ-REEL7 support?
The device supports a serial peripheral interface (SPI), compatible with microcontrollers and digital signal processors.
- What are the temperature range and drift characteristics of the AD7731BRZ-REEL7?
The device operates over a temperature range of -40°C to +85°C, with an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C.
- Can the AD7731BRZ-REEL7 perform self-calibration?
Yes, the device supports self-calibration and system calibration options.
- What are the typical applications for the AD7731BRZ-REEL7?
The device is commonly used in process control, industrial automation, medical devices, test and measurement equipment, and automotive and aerospace applications.
- What is the sampling rate of the AD7731BRZ-REEL7?
The sampling rate is programmable up to 6.4 kHz.
- What is the package type of the AD7731BRZ-REEL7?
The device is available in a 24-lead SOIC package.
- Is the AD7731BRZ-REEL7 RoHS compliant?
Yes, the AD7731BRZ-REEL7 is RoHS compliant.
