CDB5581
1.1
Overview
The CDB5581 evaluation board has both analog and digital circuit sections. The analog section consists
of the CS5581 ADC, two analog input signal buffers, controlled through a multiplexer, that condition the
signal 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 CDB5581 block diagram.
VREF
Single-ended
Analog Inputs
4.096 V
J8
Master/Slave
Serial Port
IN_A
IN_B
CS3004
M
U
X
CS5581
J6
Digital Inputs
to ADC
XTAL
J7
Digital Outputs
from ADC
16 MHz
Communication/Control
Interface
+2.5V GND -2.5V GND +3.3V GND
Figure 1. CDB5581 Block Diagram
4
DS796DB3
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