Overview
The AD7703ARZ is a high-performance, 20-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device utilizes a sigma-delta conversion technique, ensuring high accuracy and linearity. The AD7703 is designed for applications requiring precise analog-to-digital conversion, with features such as self-calibration, low power consumption, and a flexible serial interface.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 20 bits |
| Accuracy | 0.0003% |
| Sampling Rate | Up to 4 kHz |
| Input Type | Single-ended |
| Supply Voltage | Dual supply: -5V to +5V |
| Power Consumption | Low operating power, ultralow power standby mode (10 µW) |
| Interface | SPI, Serial (asynchronous and synchronous modes) |
| Package | 20-lead SOIC (Small Outline IC) |
| Operating Temperature | -40°C to +85°C |
Key Features
- High resolution of 20 bits with no missing codes, ensuring a true 20-bit dynamic range.
- Excellent linearity and endpoint accuracy due to on-chip self-calibration, which can also null system offset and gain errors.
- Flexible serial interface compatible with UARTs, shift registers, and industry-standard microcontrollers.
- Low power consumption and an ultralow power standby mode, making it ideal for battery-powered and loop-powered applications.
- A six-pole Gaussian digital low-pass filter for processing the modulator output.
Applications
- Loop-powered remote sensing applications.
- Battery-powered portable instruments.
- Industrial automation and control systems.
- Medical devices requiring high precision and low power consumption.
- Environmental monitoring and data acquisition systems.
Q & A
- What is the resolution of the AD7703ARZ?
The AD7703ARZ has a resolution of 20 bits.
- What is the maximum sampling rate of the AD7703ARZ?
The maximum sampling rate is up to 4 kHz.
- How does the AD7703ARZ handle temperature drift?
The AD7703ARZ eliminates the effects of temperature drift through on-chip self-calibration.
- What types of interfaces does the AD7703ARZ support?
The AD7703ARZ supports SPI and serial interfaces in both asynchronous and synchronous modes.
- What is the power consumption of the AD7703ARZ in standby mode?
The power consumption in standby mode is as low as 10 µW.
- What is the operating temperature range of the AD7703ARZ?
The operating temperature range is from -40°C to +85°C.
- Can the AD7703ARZ be used in battery-powered devices?
- How does the AD7703ARZ ensure linearity and accuracy?
The AD7703ARZ ensures linearity and accuracy through its on-chip self-calibration scheme.
- What package type is the AD7703ARZ available in?
The AD7703ARZ is available in a 20-lead SOIC package.
- Can external circuits be included in the calibration loop of the AD7703ARZ?
