Overview
The AD7701BNZ is a high-precision 16-bit Sigma-Delta Analog-to-Digital Converter (ADC) produced by Analog Devices Inc. This device is designed for applications requiring high accuracy and low noise. The AD7701 uses a sigma-delta conversion technique, where the analog input is continually sampled by an analog modulator, and the mean output duty cycle is proportional to the input signal. The modulator output is processed by an on-chip digital filter with a six-pole Gaussian response, updating the output data register with 16-bit binary words at word rates up to 4 kHz.
The device features self-calibration for zero and full scale, which can be initiated at any time, ensuring excellent linearity and endpoint accuracy. It also includes a power-down mode to reduce idle power consumption to 10 µW, making it suitable for power-sensitive applications.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 16 |
| Sampling Rate (Per Second) | Up to 4 kHz |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Data Interface | SPI |
| Configuration | S/H-ADC |
| Architecture | Sigma-Delta |
| Reference Type | External |
| Voltage - Supply, Analog | 5V |
| Voltage - Supply, Digital | 5V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 20-DIP (0.300", 7.62mm) |
Key Features
- High Precision: 16-bit Sigma-Delta ADC with excellent linearity and endpoint accuracy.
- Self-Calibration: Self-calibration for zero and full scale, which can be initiated at any time to ensure accuracy and null system offset and gain errors.
- Low Power Consumption: CMOS construction ensures low power dissipation, with a power-down mode reducing idle power consumption to 10 µW.
- Flexible Data Interface: Output data is accessed through a flexible serial port, compatible with UARTs and synchronous modes suitable for interfacing to shift registers or microcontrollers.
- High Sampling Rate: Sampling rates up to 4 kHz, set by a master clock input or an on-chip crystal-controlled clock oscillator.
Applications
- Industrial Automation: Suitable for precision measurement and control in industrial automation systems.
- Medical Devices: Used in medical devices requiring high accuracy and low noise, such as patient monitoring systems.
- Test and Measurement: Ideal for test and measurement equipment where precision and reliability are crucial.
- Aerospace and Defense: Applied in aerospace and defense applications requiring high precision and robust performance.
Q & A
- What is the resolution of the AD7701BNZ ADC?
The AD7701BNZ is a 16-bit ADC.
- What is the maximum sampling rate of the AD7701BNZ?
The maximum sampling rate is up to 4 kHz.
- What type of data interface does the AD7701BNZ use?
The AD7701BNZ uses an SPI data interface.
- How does the AD7701BNZ ensure accuracy?
The device features self-calibration for zero and full scale, ensuring excellent linearity and endpoint accuracy.
- What is the power consumption in power-down mode?
The power consumption in power-down mode is reduced to 10 µW.
- What is the operating temperature range of the AD7701BNZ?
The operating temperature range is -40°C ~ 85°C.
- What type of package is the AD7701BNZ available in?
The AD7701BNZ is available in a 20-DIP (0.300", 7.62mm) package.
- Can the AD7701BNZ be used in industrial automation?
Yes, it is suitable for precision measurement and control in industrial automation systems.
- Is the AD7701BNZ compatible with microcontrollers?
Yes, the output data is accessed through a flexible serial port compatible with microcontrollers.
- What is the architecture of the AD7701BNZ ADC?
The AD7701BNZ uses a Sigma-Delta conversion architecture.
