Analog Devices EVAL-AD7175-2SDZ, User Manual

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EVAL-AD7175-2SDZ User Guide
UG-AD7175-2
One
Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluating the AD7175-2 24-Bit, 250 kSPS, Sigma-Delta ADC with
20 μs Settling and Integrated Analog Input Buffers
FEATURES
Full featured evaluation board for the AD7175-2
PC control in conjunction with the SDP (see
EVAL-SDP-CB1Z
from Analog Devices, Inc. for additional information)
PC software for control and data analysis (time domain)
Standalone capability
EVALUATION KIT CONTENTS
EVAL-AD7175-2SDZ evaluation board
Evaluation software CD
7 V to 9 V ac-to-dc adapter
EQUIPMENT NEEDED
DC signal source
GENERAL DESCRIPTION
The EVAL-AD7175-2SDZ evaluation kit features the
AD7175-2 , a 24-bit, 250 kSPS analog-to-digital converter
(ADC) with integrated rail to rail analog input buffers, on-
board power supply regulation, and an external amplifier
section for amplifier evaluation. A 7 V to 9 V ac-to-dc adapter
is regulated to 5 V and 3.3 V; this supplies the
AD7175-2 and
support components. The EVAL-AD7175-2SDZ board connects
to a USB port via the system demonstration platform (SDP)
EVAL-SDP-CB1Z controller board.
The EVAL-AD7175-2SDZ evaluation software fully configures
the AD7175-2 device functionality via a user accessible register
interface and provides dc time domain analysis in the form of
waveform graphs, histograms, and associated noise analysis for
ADC performance evaluation.
FUNCTIONAL BLOCK DIAGRAM
Figure 1. EVAL-AD7175-2SDZ Block Diagram
PO W ER
STAT US
L ED
ADSP-BF527
L
E
D
USB
On Board
Noise Test
7V - 9V
VIN
CS
SCLK
DIN
DOUT/RDY
ADP7104
5V LDO
ADP7118
5V LDO
ADP7118
3.3V LDO
ADR435
5V VREF
To AD7175-2
REFOUT pin
SDP-B
AIN 0
AIN 1
AIN 3
AIN 4
AVSS
Crosspoint
Multiplexer
AVDD
Σ-Δ ADC
TEMP
SENSOR
AVSS
SERIAL
INTERFACE
& CONTROL
SYNC
ERROR
I/O
CONTROL
GPIO 0 GPIO 1
AVDD1
AVDD2
1.8V
LDO
REGCAP A IOVDD
1.8V
LDO
REGCAP D
DGND
Buffered
Precision
Reference
REF+ REF-
Reference
Input
Buffers
Analog
Input
Buffers
REFOUT
XTAL1 XTAL2/CLKIO
XTAL & INTERNAL
CLOCK OSCILLATOR
CIRCUITRY
AD7175-2
INT
REF
DIGITAL
FILTER
ADP7182
-VE LDO
-VE Supply
Rail
-2.5V
AVSS
Option
ADA4528-2
IN-AMP
Configured
ADA4528-2
OPEN
CONFIG
AD8475
+/-10V Input
Option
AMP
“SURF BOARD”
CONNECTOR
External Analog Signal
Conditioning Playground
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. Pr.C | Page 1 of 12