EVAL-AD7991EBZ

Evaluation Boards - Analog to Digital Converters (ADCs)

The EVAL-AD7991EBZ is an evaluation board designed to operate with the AD7991, a precision, 16-bit, low power, successive approximation analog to digital converter (ADC). The EVAL-AD7991EBZ provides users with a simple and straightforward platform to evaluate the features of the AD7991. This application note describes performance of the EVAL-AD7991EBZ.

Application field for EVAL-AD7991EBZ

The EVAL-AD7991EBZ is designed for the evaluation and testing of medical, industrial, automotive, and consumer applications. It has also been designed for applications that require high performance, low platform cost, and low power dissipation. The AD7991 is ideal for a variety of applications, including precision data acquisition systems, weight meters, bridge transducers, torque meters, electrical transducer monitoring, and photovoltaic panel energy conversion. The EVAL-AD7991EBZ is specifically designed for applications that require low power, low noise, and high resolution.

Working Principle for EVAL-AD7991EBZ

The EVAL-AD7991EBZ is a low power, 16-bit, successive approximation analog to digital converter (ADC). The EVAL-AD7991EBZ board utilizes a single-ended sample-and-hold input and includes an on-board reference and local power supply. The AD7991 features an integrated track-and-hold amplifier, allowing simultaneous sampling of multiple analog inputs. The integrated reference is a 1.2 V bandgap reference, which provides excellent linearity and drift performance. The charges on the capacitor banks are typically ‘floated’ when the device is idle, which reduces overall power consumption. In addition, the EVAL-AD7991EBZ features a low power sleep mode, which enables the device to consume minimal current while idle.

The integrated low pass filter and anti-aliasing filter are designed to reduce the high frequency noise that can be found in any electrical system. The ADC is capable of 16-bit resolution at 40 kSPS, and provides excellent linearity and dynamic range performance. The EVAL-AD7991EBZ has an operating range from ±5V to ±. The conversion time is 21.5 µs (max). The integrated power supply and signal conditioning on the EVAL-AD7991EBZ supplies all the required features for the ADC, including the reference, filter, and voltage regulators.

The EVAL-AD7991EBZ is designed to evaluation the performance of a 16-bit ADC in a variety of applications. The board is capable of driving both differential and single-ended voltage inputs. The EVAL-AD7991EBZ operates as low as 1 mA current dissipation and features a USB-powered option, making it ideal for battery-operated and portable applications. The EVAL-AD7991EBZ also includes a graphical user interface which supports data collection, logging, and plotting of the digital output from the AD7991.

Conclusion

The EVAL-AD7991EBZ is a low power, 16-bit, successive approximation analog to digital converter specifically designed for a variety of applications. The board operates at a low current of 1 mA, allowing for battery-operated and portable applications. It has an integrated low-pass filter and a USB-powered option. The EVAL-AD7991EBZ also features a graphical user interface that allows for data collection, logging, and plotting of the digital output from the AD7991.