Overview
The AD7701BR, produced by Analog Devices Inc., is a 16-bit analog-to-digital converter (ADC) that utilizes a sigma-delta conversion technique. This device is known for its high accuracy and low power consumption, making it suitable for a variety of applications, including industrial, instrumentation, and remote sensing. The AD7701BR features a continuous sampling analog modulator and an on-chip digital filter with a six-pole Gaussian response, ensuring excellent linearity and endpoint accuracy through self-calibration.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 16 | Bits | |
| Integral Nonlinearity | ±0.0007% FSR (typ), ±0.0015% FSR (max) | % FSR | TMIN to TMAX |
| Differential Nonlinearity | ±0.125 LSB (typ), ±0.5 LSB (max) | LSB | TMIN to TMAX |
| Positive Full-Scale Error | ±0.13 LSB (typ), ±0.5 LSB (max) | LSB | |
| Power Supply Voltages | 4.5/5.5 V (AVDD), 4.5/AVDD V (DVDD), -4.5/-5.5 V (AVSS), -4.5/-5.5 V (DVSS) | V | min/max |
| DC Power Supply Currents | 2.7 mA (AIDD), 2 mA (DIDD) | mA | max |
| Operating Temperature | -40°C to +85°C | °C | |
| Package/Case | 28-SOIC |
Key Features
- High Resolution and Accuracy: The AD7701BR offers 16-bit resolution with outstanding 0.0015% accuracy and no missing codes, ensuring a true 16-bit dynamic range.
- Self-Calibration: On-chip self-calibration eliminates zero and gain errors, and can also include external circuits to remove system offsets and gain errors.
- Flexible Interface: The device features a flexible serial port with asynchronous mode compatible with UARTs and two synchronous modes suitable for interfacing to shift registers or microcontrollers.
- Low Power Consumption: CMOS construction ensures low power dissipation, with an ultralow power standby mode reducing idle power consumption to 10 µW.
- Temperature Stability: The effects of temperature drift are minimized through the self-calibration scheme.
Applications
- Industrial and Instrumentation: Suitable for precision measurement and control systems.
- Remote Sensing: Ideal for loop-powered remote sensing applications due to its low power consumption.
- Battery-Powered Devices: Suitable for battery-powered portable instruments.
- Data Acquisition Systems: Can be integrated into various data acquisition systems requiring high accuracy and low power.
Q & A
- What is the resolution of the AD7701BR?
The AD7701BR has a 16-bit resolution.
- What is the accuracy of the AD7701BR?
The AD7701BR offers an accuracy of ±0.0015% FSR.
- Does the AD7701BR have any missing codes?
No, the AD7701BR ensures no missing codes, providing a true 16-bit dynamic range.
- How does the AD7701BR handle temperature drift?
The AD7701BR eliminates the effects of temperature drift through its on-chip self-calibration scheme.
- What types of interfaces does the AD7701BR support?
The AD7701BR supports asynchronous and synchronous serial interfaces, compatible with UARTs and microcontrollers.
- What is the power consumption of the AD7701BR in standby mode?
The AD7701BR has an ultralow power standby mode that reduces idle power consumption to 10 µW.
- What is the operating temperature range of the AD7701BR?
The operating temperature range of the AD7701BR is -40°C to +85°C.
- What package type is the AD7701BR available in?
The AD7701BR is available in a 28-SOIC package.
- Can the AD7701BR be used in battery-powered devices?
Yes, the AD7701BR is suitable for battery-powered portable instruments due to its low power consumption.
- Is the AD7701BR suitable for remote sensing applications?
Yes, the AD7701BR is ideal for loop-powered remote sensing applications.
