herunterladen
EVAL-AD7175-8SDZ User Guide
UG-901
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 AD7175-8 24-Bit, 250 kSPS, Sigma-Delta ADC with
20 µs Settling and Integrated Analog Input Buffers
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 10
FEATURES
Full featured evaluation board for the AD7175-8
PC control in conjunction with the Analog Devices, Inc.,
SDP-B board (EVAL-SDP-CB1Z)
PC software for control and data analysis (time domain)
Standalone capability
EVALUATION KIT CONTENTS
EVAL-AD7175-8SDZ evaluation board
Evaluation software CD
7 V to 9 V ac-to-dc adapter
ADDITIONAL EQUIPMENT NEEDED
DC signal source
GENERAL DESCRIPTION
The E VA L-AD7175-8SDZ evaluation board features the
AD7175-8, a 24-bit, 250 kSPS analog-to-digital converter
(ADC) with integrated 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 AD7175-8 and support
components. The evaluation board connects to a USB port via
the SDP-B system demonstration platform controller board
(EVA L -SDP-CB1Z).
The AD7175-8 evaluation software fully configures the
AD7175-8 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.
Full specifications on the AD7175-8 are available in the product
data sheet, which should be consulted in conjunction with this
user guide when working with the evaluation board. Full details
for the SDP-B controller board are available on the Analog
Devices website.
FUNCTIONAL BLOCK DIAGRAM
POWER
ADSP-BF527
LED
LED
USB
ON-BOARD
NOISE TEST
7V
TO 9V
VIN
CS
SCLK
DIN
DOUT/RDY
ADP7104
5V LDO
ADP1720
5V LDO
ADP1720
3.3V LDO
ADR445
5V VREF
TO AD7175-8
REFOUT PIN
SDP-B
AIN0/REF2–
AIN1/REF2+
AIN15
AIN16
A
VSS
CROSSPOINT
MU
LTIPLEXER
AVDD
Σ-Δ ADC
TEMP
SENSOR
AVSS
PDSW
SERIAL
INTERF
ACE
AND
CONTROL
SYNC
ERROR
INPUT/OUTPUT
CONTROL
GPIO0 GPIO1
AVDD1
AVDD2
1.8V
LDO
REGCA
PA
IOVDD
1.8V
LDO
REGCAPD
DGND
BUFFERED
PRECISION
REFERENCE
REF+REF–
REFERENCE
INPUT
BUFFERS
ANALOG
INPUT
BUFFERS
REFOUT
X
TAL1 XTAL2/CLKIO
XTAL AND INTERNAL
CLOCK OSCILLAT
OR
CIRCUITRY
AD7175-8
INT
REF
DIGITAL
FILTER
GPO2 GPO3
STATUS
13767-001
Figure 1. EVAL-AD7175-8SDZ Block Diagram
