Overview
The AD7703BRZ is a high-performance, 20-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This sigma-delta ADC is designed for precision data acquisition and is notable for its excellent linearity, high accuracy, and low power consumption. The AD7703 uses a sigma-delta conversion technique and features an on-chip digital filter with a six-pole Gaussian response, ensuring high-quality output data. The device is suitable for a variety of applications requiring precise analog-to-digital conversion, including industrial, medical, and scientific instruments.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 20 bits |
| Accuracy | 0.0003% |
| Output Word Rate | Up to 4 kHz |
| Sampling Rate | Set by master clock input or on-chip clock oscillator |
| Filter Response | Six-pole Gaussian digital low-pass filter |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 20-Lead Standard Small Outline Package (SOIC) |
| Power Consumption | Low operating power, ultralow power standby mode (10 µW) |
| Interface | Flexible serial port with asynchronous and synchronous modes |
Key Features
- High Resolution and Accuracy: The AD7703 offers 20-bit resolution with 0.0003% accuracy, ensuring no missing codes and a true 20-bit dynamic range.
- Self-Calibration: On-chip self-calibration eliminates zero and gain errors, and can also include external circuits in the calibration loop.
- Flexible Interface: The device features a flexible serial port compatible with UARTs and industry-standard microcontrollers and DSP processors.
- Low Power Consumption: Low operating power and an ultralow power standby mode make it ideal for battery-powered and loop-powered applications.
- Temperature Stability: The effects of temperature drift are eliminated by the on-chip self-calibration scheme.
Applications
- Industrial Instruments: Suitable for precision measurement and control systems.
- Medical Devices: Ideal for medical equipment requiring high accuracy and reliability.
- Scientific Instruments: Used in various scientific and laboratory equipment for precise data acquisition.
- Remote Sensing: Suitable for loop-powered remote sensing applications.
- Battery-Powered Instruments: Ideal for portable, battery-powered devices due to its low power consumption.
Q & A
- What is the resolution of the AD7703BRZ?
The AD7703BRZ has a 20-bit resolution.
- What is the accuracy of the AD7703BRZ?
The AD7703BRZ offers an accuracy of 0.0003%.
- How does the AD7703BRZ handle temperature drift?
The AD7703BRZ eliminates the effects of temperature drift through its on-chip self-calibration scheme.
- What types of interfaces does the AD7703BRZ support?
The AD7703BRZ features a flexible serial port with asynchronous and synchronous modes, compatible with UARTs and industry-standard microcontrollers and DSP processors.
- What is the power consumption of the AD7703BRZ in standby mode?
The AD7703BRZ has an ultralow power standby mode of 10 µW.
- Can the AD7703BRZ be used in battery-powered devices?
Yes, the AD7703BRZ is suitable for battery-powered devices due to its low power consumption.
- How is the output data accessed from the AD7703BRZ?
The output data can be read from the serial port randomly or periodically at any rate up to 4 kHz.
- What is the operating temperature range of the AD7703BRZ?
The AD7703BRZ operates within a temperature range of -40°C to +85°C.
- Does the AD7703BRZ support self-calibration?
Yes, the AD7703BRZ supports on-chip self-calibration to eliminate zero and gain errors.
- What type of filter does the AD7703BRZ use?
The AD7703BRZ uses a six-pole Gaussian digital low-pass filter.
