Overview
The AD7731BR from Analog Devices Inc. is a high-performance, 24-bit Sigma-Delta Analog-to-Digital Converter (ADC) designed for precision data acquisition and process control applications. This device features a proprietary programmable gain front end, allowing it to accept a wide range of input signal levels directly from transducers. The AD7731BR operates from a single +5 V supply and is known for its low noise and high throughput capabilities.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7731BR |
| Package | 24-SOIC (0.295", 7.50mm Width) |
| Number of Bits | 24 |
| Input Type | Differential, Pseudo-Differential |
| Maximum Number of Inputs | 3 (differential), 5 (pseudo-differential) |
| Output Rate | Up to 6.4 kHz |
| Resolution | 16 bits peak-to-peak at 800 Hz output rate |
| Supply Voltage | +5 V |
| Operating Temperature | -40°C to +85°C |
| Interface | SPI, compatible with microcontrollers and DSPs |
Key Features
- 24-bit Sigma-Delta ADC with high resolution and low noise.
- Programmable gain front end with MUX-PGA-ADC configuration.
- Supports seven unipolar and seven bipolar analog input ranges.
- Self-calibration and system calibration options.
- Low offset drift (< 5 nV/°C) and gain drift (< 2 ppm/°C).
- Serial interface compatible with three-wire operation.
- Fast channel switching with 1 ms settling time.
Applications
- Process control and industrial automation.
- Communication systems requiring high precision ADCs.
- Medical devices and diagnostic equipment.
- Test and measurement instruments.
- Automotive and aerospace applications.
Q & A
- What is the resolution of the AD7731BR ADC?
The AD7731BR has a 24-bit resolution, with 16 bits peak-to-peak resolution at an 800 Hz output rate.
- What are the input ranges supported by the AD7731BR?
The device supports seven unipolar and seven bipolar analog input ranges, from 0 to +20 mV to ±1.28 V.
- What is the maximum output rate of the AD7731BR?
The maximum output rate is up to 6.4 kHz.
- What type of interface does the AD7731BR use?
The AD7731BR uses a serial interface compatible with three-wire operation and is compatible with microcontrollers and digital signal processors.
- What is the operating temperature range of the AD7731BR?
The operating temperature range is -40°C to +85°C.
- Does the AD7731BR support self-calibration?
Yes, the AD7731BR supports self-calibration and system calibration options.
- What is the package type of the AD7731BR?
The AD7731BR is available in a 24-lead SOIC package.
- How many differential inputs does the AD7731BR support?
The device supports three differential inputs and can be configured for five pseudo-differential inputs.
- What is the settling time for channel switching?
The settling time for channel switching is 1 ms.
- Is the AD7731BR RoHS compliant?
Yes, the AD7731BR is RoHS compliant.
