The EVAL-AD7747EBZ is an evaluation board to evaluate the performance of 24bit CDC with temperature sensor. The AD7747 is a high resolution Σ-Δ capacitance to digital converter (CDC). The capacitance to be measured is connected directly to the device inputs. The architecture features inherent high resolution (24bit no missing codes, 18bit effective resolution at a 16.6Hz data rate), high linearity (±0.01%), and high accuracy (±4fF factory calibrated). The AD7747 capacitance input range is ±8pF (changing), while it can accept up to 17pF absolute capacitance (not changing), which is compensated by an on chip digital to capacitance converter (CAPDAC). The AD7747 is designed for single ended or differential capacitive sensors with one plate connected to ground. The evaluation board interfaces to the USB port of a PC. Evaluation software is available with the evaluation board, which allows the user to easily communicate with the AD7747.
PC evaluation software for control and measurement of the AD7747
USB interface with cable
Voltage input channel
Internal clock oscillator
2 wire serial interface (I2C compatible)
Interfaces to single or differential grounded sensors
Resolution down to 20aF (that is, up to 19.5bit ENOB)
Resolution down to 20 aF (that is, up to 19.5bit ENOB)
ESD sensitive device, take proper precaution while handling the device.
