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EVAL-AD7490SDZ User Guide
UG-446
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 AD7490 Successive Approximation ADC
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. A | Page 1 of 21
FEATURES
Full featured evaluation board for the AD7490
PC control in conjunction with the system demonstration
platform (EVAL-SDP-CB1Z)
PC software for control and data analysis (time and
frequency domain)
Standalone capability
EVALUATION KIT CONTENTS
EVAL-AD7490SDZ evaluation board
Evaluation software CD for the AD7490
9 V mains power supply adapter
ADDITIONAL EQUIPMENT NEEDED
EVAL-SDP-CB1Z system demonstration platform
Precision analog signal source
SMB cables
USB cables
PC running Windows XP SP2, Windows Vista, or Windows 7
with USB 2.0 port
ONLINE RESOURCES
Documents
AD7490 data sheet
EVAL-AD7490SDZ user guide
Required Software
EVAL-AD7490SDZ evaluation software
GENERAL DESCRIPTION
The EVAL-AD7490SDZ is a full featured evaluation board that can
be used to easily evaluate all features of the AD7490. The AD7490
is a 12-bit, high speed, low power, successive approximation ADC.
The device operates from a single 2.7 V to 5.25 V power supply and
features throughput rates of up to 1 MSPS. The device contains
a low noise, wide bandwidth, track-and-hold amplifier that can
handle input frequencies of greater than 1 MHz.
The evaluation board can be controlled via the system demon-
stration platform (SDP). The EVAL-SDP-CB1Z board allows
the evaluation board to be controlled via the USB port of a PC
using the AD7490 evaluation software. The EVAL-AD7490SDZ
generates all required power supplies on board and supplies power
to the EVAL-SDP-CB1Z controller board. On-board components
include the following:
AD8034: low cost, 80 MHz FastFET™ op amp
ADP1613: step-up PWM dc-to-dc switching converter
ADP3303-5: high accuracy anyCAP® 200 mA low dropout
linear regulator
ADP7104: 20 V, 500 mA, low noise, CMOS LDO
ADM1185: quad voltage monitor and sequencer
ADP190: logic controlled, high-side power switch
ADG3308: low voltage, 1.15 V to 5.5 V, 8-channel,
bidirectional logic level translator
ADR3425: micropower, high accuracy voltage reference
REF192: precision micropower, low dropout, low voltage
reference
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
5V
+
–
VCC
VSS
VDD
VDRIVE
GND
GND
GND
VIN0 TO VIN15
UNIPOLAR
INPUT SIGNALS × 16
INPUT
BUFFERS × 16
VIN
BIPOLAR
INPUT SIGNAL
AD8034
BIASED VIN
AD8034
EVAL-AD7490SDZ
EVAL-SDP-CB1Z
CONTROLLER
BOARD
BF527
DSP
SERIAL
INTERFACE
AD7490
REFIN
VDD VDRIVE
DOUT
DIN
SCLK
CS
VIN0 TO VIN15
ADR3425
REF192
REF
ADG3308
LEVEL
SHIFTER
OP AMP
SUPPLIES
VIN GND
7V TO
9V
DC
INPUT JACK
VIN
ON-BOARD
POWER SUPPLIES
ADP7104
SDP +5V
ADP190
+3.3V
ADP1613
±12V
ADP3303
+5V
ADM1185
POWER
SEQUENCER
10918-001
