Cirrus Logic CDB5566 - Manual (Page 4)

CDB5566
4 DS806DB3
1.1 Overview
The CDB5566 evaluation board has both analog and digital circuit sections. The analog section consists
of the CS5566 ADC, two analog input signal buffers, controlled through a multiplexer, that condition the
signals into the ADC, and a precision 4.096 V reference. The digital section consists of board operation
configuration control signals, reset circuitry, an SPI™ serial port, a jumper connection for initiating ADC
calibration, and an EEPROM for evaluation board identification.
The evaluation board operates from +2.5V, -2.5V, +3.3V and communicates through an SPI™ serial port.
Figure 1 illustrates the CDB5566 block diagram.
CS5566
M
U
X
VREF
4.096 V
XTAL
16 MHz
Communication/Control
Interface
Master/Slave
Serial Port
Digital Inputs
to ADC
Digital Outputs
from ADC
INPUT A
+2.5V GND -2.5V GND +3.3V GND
J8
J6
J7
LMP7732
Differential
Analog Inputs
INPUT B
LMP7732
Figure 1. CDB5566 Block Diagram