Cirrus Logic CDB5566 - Manual (Page 3)

CDB5566
DS806DB3 3
1. INTRODUCTION
The CDB5566 evaluation board is a platform for evaluating the CS5566 ADC performance. The evalua-
tion board is designed to connect to the SPI serial port of a processor or data capture system or will inter-
face directly to the CapturePlus II data acquisition system available from Cirrus Logic. The CapturePlus II
data acquisition system is a powerful integrated hardware/software tool designed to fully exercise the
CDB5566 and other Cirrus Logic evaluation boards.
The CDB5566 evaluation board is designed to simplify the hardware setup required to evaluate the
CS5566. Interfacing the CDB5566 evaluation board to a user-supplied data capture system can be as
simple as connecting the SPI port and using the CDB5566 default hardware configuration. In this config-
uration, simply press the Reset switch on the CDB5566 and it will automatically begin transmitting data to
the data capture system.
All evaluation board functionality for evaluating the CS5566 ADC is accessed through the connector in-
terface and board-level options.
The CS5566 delta-sigma ADC produces fully settled conversions to full specified accuracy at 5 kSps. The
ability to produce fully settled conversions for every sample makes it suitable for converting multiplexed
input signals. To help evaluate this feature, the CDB5566 includes two differential analog inputs multi-
plexed into the CS5566. The multiplexer can be switched at the CS5566 ADC sample speed and the ADC
will produce fully settled conversion data for each input channel.
For detailed information on the CS5566 ADC, please reference data sheet DS806 at www.cirrus.com .