Overview
The AD7731BRZ-REEL, manufactured by Analog Devices Inc., is a high-performance, 24-bit sigma-delta analog-to-digital converter (ADC). This device 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 AD7731 operates from a single +5 V supply and supports both unipolar and bipolar input ranges, making it versatile for different measurement scenarios.
Key Specifications
| Parameter | Value | Comments |
|---|---|---|
| Part Number | AD7731BRZ-REEL | |
| Manufacturer | Analog Devices Inc. | |
| Package | 24-SOIC (0.295, 7.50mm Width) | |
| Number of Inputs | 3, 5 | Buffered differential programmable gain analog inputs |
| Number of Bits | 24 | |
| Sampling Rate | Up to 6.4 kHz | Programmable output rates |
| Polarity | Bipolar, Unipolar | Supports seven unipolar and seven bipolar ranges |
| Interface | SPI | Three-wire operation compatible with microcontrollers and DSPs |
| Supply Voltage | 2.7 V to 5 V | Single supply operation |
| Output Format | SERIAL | |
| Operating Temperature | -40°C to +85°C |
Key Features
- 24-Bit Sigma-Delta ADC: High resolution and low noise performance.
- Programmable Gain Front End: Allows direct connection of low-level signals from transducers.
- Programmable Output Rates: Up to 6.4 kHz, adjustable filter cutoff, output rate, and settling time.
- Multiple Input Configurations: Three buffered differential programmable gain analog inputs, configurable as five pseudo-differential inputs.
- Differential Reference Input: Supports a range of reference voltages.
- Low Drift: Offset drift of less than 5 nV/°C and gain drift of less than 2 ppm/°C.
- Self-Calibration and System Calibration: Ensures high accuracy and reliability.
- Serial Interface: Compatible with microcontrollers and digital signal processors.
Applications
- Process Control: Ideal for industrial process control applications due to its high accuracy and programmable gain front end.
- Industrial Automation: Suitable for various automation tasks requiring precise analog-to-digital conversion.
- Medical Devices: Can be used in medical equipment where high resolution and low noise are critical.
- Test and Measurement: Useful in test and measurement equipment requiring high precision and flexibility.
Q & A
- What is the resolution of the AD7731BRZ-REEL?
The AD7731BRZ-REEL 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 ranges supported by the AD7731BRZ-REEL?
The device supports seven unipolar and seven bipolar input ranges, including ±20 mV, ±40 mV, ±80 mV, ±160 mV, ±320 mV, ±640 mV, and ±1.28 V.
- What is the sampling rate of the AD7731BRZ-REEL?
The AD7731BRZ-REEL has programmable output rates up to 6.4 kHz.
- What type of interface does the AD7731BRZ-REEL use?
The device uses a serial interface (SPI) compatible with microcontrollers and digital signal processors.
- What is the supply voltage range for the AD7731BRZ-REEL?
The device operates from a single supply voltage of 2.7 V to 5 V.
- What are the key features of the AD7731BRZ-REEL's analog inputs?
The device has three buffered differential programmable gain analog inputs, which can be configured as five pseudo-differential inputs.
- Does the AD7731BRZ-REEL support self-calibration?
Yes, the AD7731BRZ-REEL supports self-calibration and system calibration options).
- What is the operating temperature range of the AD7731BRZ-REEL?
The device operates over a temperature range of -40°C to +85°C).
- What is the drift performance of the AD7731BRZ-REEL?
The device has an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C).
- In what package is the AD7731BRZ-REEL available?
The AD7731BRZ-REEL is available in a 24-lead SOIC package).
