Overview
The AD7731BRUZ-REEL7, produced by Analog Devices Inc., is a 24-bit sigma-delta analog-to-digital converter (ADC) designed for high-precision data acquisition. This device is particularly suited for process control applications due to its low noise and high throughput capabilities. 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 offers flexible input ranges, including both unipolar and bipolar configurations.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Resolution | 24 bits | - |
| Peak-to-Peak Resolution at 800 Hz | 16 bits | - |
| Output Rate | Up to 6.4 kHz | fCLK IN = 4.9152 MHz |
| Input Ranges | 0 to +20 mV, +40 mV, +80 mV, +160 mV, +320 mV, +640 mV, +1.28 V (unipolar); ±20 mV, ±40 mV, ±80 mV, ±160 mV, ±320 mV, ±640 mV, ±1.28 V (bipolar) | - |
| Supply Voltage | +5 V | - |
| Package Type | 24-lead TSSOP | - |
| Operating Temperature Range | -40°C to +85°C | - |
| Reference Input Voltage | +2.5 V or +5 V (depending on HIREF bit setting) | - |
| Offset Drift | < 5 nV/°C | - |
| Gain Drift | < 2 ppm/°C | - |
Key Features
- 24-bit sigma-delta ADC architecture for high precision and low noise.
- Programmable gain front end to accommodate various input signal ranges.
- Three buffered differential programmable gain analog inputs (configurable as five pseudo-differential inputs).
- Differential reference input.
- Programmable output rates up to 6.4 kHz.
- Self-calibration and system calibration options.
- Low offset drift (< 5 nV/°C) and gain drift (< 2 ppm/°C).
- Serial interface compatible with microcontrollers and digital signal processors.
- Fast channel switching with 1 ms settling time.
Applications
- Process control systems.
- Industrial automation.
- High-precision data acquisition systems.
- Medical devices requiring accurate analog-to-digital conversion.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7731BRUZ-REEL7?
The AD7731BRUZ-REEL7 has a 24-bit resolution, with a peak-to-peak resolution of 16 bits at an 800 Hz output rate.
- What are the input ranges supported by the AD7731BRUZ-REEL7?
The device supports seven unipolar and seven bipolar analog input ranges, ranging from 0 to +1.28 V and ±1.28 V respectively.
- What is the operating supply voltage of the AD7731BRUZ-REEL7?
The device operates from a single +5 V supply.
- What is the package type of the AD7731BRUZ-REEL7?
The device is available in a 24-lead TSSOP package.
- What is the operating temperature range of the AD7731BRUZ-REEL7?
The operating temperature range is -40°C to +85°C.
- Does the AD7731BRUZ-REEL7 support self-calibration?
Yes, the device supports both self-calibration and system calibration options.
- How fast can the AD7731BRUZ-REEL7 switch between channels?
The device can switch between channels with a settling time of 1 ms.
- Is the AD7731BRUZ-REEL7 compatible with microcontrollers and digital signal processors?
Yes, the serial interface of the AD7731BRUZ-REEL7 is compatible with microcontrollers and digital signal processors.
- What is the drift performance of the AD7731BRUZ-REEL7?
The device has an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C.
- What are some typical applications of the AD7731BRUZ-REEL7?
Typical applications include process control systems, industrial automation, high-precision data acquisition systems, medical devices, and test and measurement equipment.
