Analog Devices EVAL-AD7656-1SDZ User manual

Evaluation Board User Guide
UG-AD7656-1/57-1/58-1
One Technology Way •P. O . Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: [phone] •Fax: [phone] •www.analog.com
Evaluating the AD7656-1/57-1/58-1
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS. Rev. PrA | Page 1 of 32
FEATURES
Full-featured evaluation board for the AD7656-1/57-1/58-1
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
The following evaluation boards are covered by this user guide:
EVAL-AD7656-1SDZ
EVAL-AD7657-1SDZ
EVAL-AD7658-1SDZ
EVAL-AD7656-1/57-1/58-1SDZ KIT CONTENTS
EVAL-AD7656-1/57-1/58-1SDZ Evaluation Board
Evaluation Software CD for the AD7656-1/57-1/58-1
9V Mains power supply adapter
ADDITIONAL EQUIPMENT NEEDED
System Demonstration platform (EVAL-SDP-CB1Z)
Precision Analog signal source
SMB cables
USB Cables
EVALUATION BOARD DESCRIPTION
This User Guide describes the evaluation board for the
AD7656-1/57-1/58-1 which are 16-/14-/12-, Six-Channel
Simultaneous
Sampling 250 ksps ADCs respectively. The AD7656-1/57-1/58-1
contains six 16-/14-/12- low power SAR ADCs. The parts
operate from a single 4.75V to 5.25V supply and dual ± 12V
power supply and feature throughput rates of up to 250 ksps.
Full details on the AD7656-1/57-1/58-1 are available in the
AD7656-1/57-1/58-1 datasheets which are available from
Analog Devices and should be consulted in conjunction with
this User Guide when using
the Evaluation Board.
On-board components include the:
AD8597: Ultralow Distortion, Ultralow Noise Op Amp
(single)
AD8031: 2.7 V, 800 μA, 80 MHz Rail-to-Rail I/O Single
Amplifier
ADP1613: Step-Up PWM DC-to-DC Switching
Converter,
ADP3303-5: High Accuracy anyCAP™ 200 mA Low
Dropout Linear Regulator
ADP2301: 1.2 A, 20 V, 1.4 MHz non-synchronous step-
down switching regulator
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
ADR431: Ultralow Noise XFET® Voltage References
with Current Sink and Source Capability
AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap
Voltage Reference.
Various link options are described in the Evaluation Board
Hardware section.

UG-AD7656-1/57-1/58-1 Evaluation Board User Guide
Rev. PrA | Page 2 of 32
FUNCTIONAL BLOCK DIAGRAM
CONVST_A..C
WR
DB0..15
AVCC
AD7656-1
EVAL-SDP-CB1Z
CONTROLLER
BOARD
5V
BF527
DSP
PARALLEL
INTERFACE
ON-BOARD
POWER SUPPLIES
VSS
ADG3308
LEVEL
SHIFTERS
VSS
VDRIVE
VIN
DC
INPUT
JACK
VDD
GND
RD
V1
+
-
AD780/
ADR431
Ref
REFIN/
REFOUT
VDRIVE
DVCC
GND
DGND GND
EVAL-AD7656-1SDZ
ADP3303
(x2) +5V
ADP2301
SDP 5V
ADP1613
+/-15V
ADP190
3.3V
AM1185
POWER
SEQUENCER
OP AMP
SUPPLIES
AD8597
VIN
VDD
7-9V
BUSY
CS
W/B
RANGE
SER/PAR_SEL
H/S_SEL
RESET
HARDWARE
SELECT
REFCAPA..
REFCAPC
DVCC
AD8597
AD8597
AD8597
AD8597
AD8597
V2
V3
V4
V5
V6
3.3VIO
V1
V2
V3
V4
V5
V6
AVCCAGND
Figure 1 Functional Block Diagram

Evaluation Board User Guide UG-AD7656-1/57-1/58-1
Rev. PrA | Page 3 of 32
TABLE OF CONTENTS
Features...............................................................................................1
EVAL-AD7656-1/57-1/58-1SDZ KIT Contents .......................1
Additional Equipment Needed........................................................1
Evaluation Board Description .........................................................1
Functional Block Diagram...............................................................2
Table of Contents...............................................................................3
Revision History................................................................................3
EVAL-AD7656-1/57-1/58-1SDZ Quickstart Guide .....................4
Recommended Quick Start GUIDE...........................................4
Evaluation Board Hardware.............................................................5
AD7656-1/57-1/58-1 Device Description .....................................5
Hardware Link Options................................................................6
Power Supplies.............................................................................11
parallel interface..........................................................................11
Serial Interface.............................................................................11
Digital interface...........................................................................11
Analog Inputs ..............................................................................11
Reference Options.......................................................................11
Sockets/Connectors....................................................................12
EVAL-AD7656-1/57-1/58-1SDZ Basic Hardware Setup....13
Evaluation Board SoftwarE............................................................14
Software Installation...................................................................14
Launching The Software ............................................................16
Software Operation.....................................................................16
Description of User Software panel..........................................17
WaveForm Capture.....................................................................19
AC Testing - Histogram .............................................................20
DC Testing - Histogram.............................................................20
AC Testing - FFT Capture..........................................................21
Summary Tab...............................................................................22
Save File........................................................................................23
Load File.......................................................................................23
Evaluation Board Schematics and Artwork.................................24
REVISION HISTORY
04/12—Revision Pr A

UG-AD7656-1/57-1/58-1 Evaluation Board User
Guide
Rev. PrA | Page 4 of 32
EVAL-AD7656-1/57-1/58-1SDZ QUICKSTART GUIDE
RECOMMENDED QUICK START GUIDE
To install the software do the following:
(1) Install the AD7656-1/57-1/58-1 Software from the
enclosed CD. Ensure the EVAL-SDP-CB1Z board is
disconnected from the USB port of the PC while
installing the software. The PC must be restarted after
the installation.
(2) Connect the EVAL-SDP-CB1Z board to the EVAL-
AD7656-1/57-1/58-1SDZ board as shown in Figure
1Figure 2.
(3) Screwing the two boards together with the enclosed
nylon screw-nut set will ensure the boards connect
firmly together.
(4) Connect the 9V power supply adapter included in the
kit to connecter J702 on the EVAL-AD7656-1/57-
1/58-1SDZ board.
(5) Connect the EVAL-SDP-CB1Z board to the PC via the
USB cable. For Windows XP you may need to search
for the EVAL-SDP-CB1Z drivers. Choose to
automatically search for the drivers for the EVAL-
SDP-CB1Z board if prompted by the operating
system.
(6) Launch the EVAL-AD7656-1/57-1/58-1SDZ software
from the Analog Devices subfolder in the Programs
menu.
Figure 2 Evauation Board connection
.

Evaluation Board User
Guide UG-AD7656-1/57-1/58-1
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS. Rev. PrA | Page 5 of 32
EVALUATION BOARD HARDWARE
AD7656-1/57-1/58-1 DEVICE DESCRIPTION
The AD7656-1/AD7657-1/AD7658-1 are reduced decoupling
pin and software-compatible versions of
AD7656/AD7657/AD7658. The AD7656-1/AD7657-
1/AD7658-1 devices contain six 16-/14-/12-bit, fast, low power
successive approximation ADCs in a package designed on the
iCMOS® process (industrial CMOS). iCMOS is a process
combining high voltage silicon with submicron CMOS and
complementary bipolar technologies. It enables the
development of a wide range of high performance analog ICs
capable of 33 V operation in a footprint that no previous
generation of high voltage parts could achieve. Unlike analog
ICs using conventional CMOS processes, iCMOS components
can accept bipolar input signals while providing increased
performance, which dramatically reduces power consumption
and package size.
The AD7656-1/AD7657-1/AD7658-1 feature throughput rates
of up to 250 kSPS. The parts contain low noise, wide bandwidth
track-and-hold amplifiers that can handle input frequencies
up to 4.5 MHz.
The conversion process and data acquisition are controlled
using the CONVST signals and an internal oscillator. Three
CONVST pins (CONVST A, CONVST B, and CONVST C)
allow independent, simultaneous sampling of the three ADC
pairs. The AD7656-1/AD7657-1/AD7658-1 have a high speed
parallel and serial interface, allowing the devices to interface
with microprocessors or DSPs. When the serial interface is
selected, each part has a daisy-chain feature that allows multiple
ADCs to connect to a single serial interface.
The AD7656-1/AD7657-1/AD7658-1 can accommodate true
bipolar input signals in the ±4 × VREF and ±2 × VREF ranges.
Each AD7656-1/AD7657-1/AD7658-1 also contains an on-chip
2.5 V reference.
.

UG-AD7656-1/57-1/58-1 Evaluation Board User
Guide
Rev. PrA | Page 6 of 32
HARDWARE LINK OPTIONS
There are 23 link options, which must be set for the required operating setup before using the evaluation board. The functions of these
options are outlined in Table 1. Shows the position in which all the links are set when the evaluation board is packaged. Jumper and
solder link (LKx) options must be set correctly to select the appropriate operating setup before using the evaluation board. The default
link positions are shown in Table 2 and the functions of these options are outlined in Table 1
Table 1 Link Options
Link No. Function
LK1
H/S_SEL Selection
Position A: Software input selected.
Position B: Hardware input selected.
LK2
VREF Buffer Signal Selection
Position A: Unbuffered.
Position B: Buffered by U10 AD8031 Op Amp.
LK3
WR/REFEN/DIS Signal Selection
Position A: Controlled by EVAL-SDP1Z.
Position B: Connected to external socket J7-2.
Position C: Connected to GND.
Position D: Connected to VDRIVE.
LK4 V1 input jumper. When inserted input is shorted to GND.
LK5 V2 input jumper. When inserted input is shorted to GND.
LK6
RANGE Selection
Position A: Connected to VDRIVE.
Position B: Connected to GND.
LK7 STBY Selection
Position A: Connected to VDRIVE.
Position B: Connected to GND.
LK8 RESET Selection
Position A: Connected to VDRIVE.
Position B: Connected to GND.
Position C: Controlled by EVAL-SDP1Z.
LK9
W/B Selection
Position A: Connected to VDRIVE.
Position B: Connected to GND.
LK10
BUSY Selection
Position A: Controlled by EVAL-SDP1Z.
Position B: Connected to external socket J7-12.
LK11
CONVST_A Selection
Position A: Connected to external socket J7-8.
Position B: Controlled by EVAL-SDP1Z.
Position C: Connected to GND.
LK12
CS Source Signal Selection
Position A: Controlled by EVAL-SDP1Z.
Position B: Connected to external socket J7-1.
LK13
VREF Source Signal Selection
Position A: Sourced from U5 AD780.
Position B: Sourced from U3 ADR431.
LK14 V3 input jumper. When inserted input is shorted to GND.

Evaluation Board User
Guide UG-AD7656-1/57-1/58-1
Rev. PrA | Page 7 of 32
Link No. Function
LK15 V4 input jumper. When inserted input is shorted to GND.
LK16
VDRIVE Source Signal Selection
Position A: Sourced from onboard 3.3V. (Requires the SDP1Z board to be connected) .
Position B: Connected to external socket J7-14.
LK17 V5 input jumper. When inserted input is shorted to GND.
LK18 V6 input jumper. When inserted input is shorted to GND.
LK19
REFIN/REFOUT Source Selection
Inserted: External Reference connected
Removed: External Reference disconnected.
LK20
SER/PAR_SEL Selection
Position A: Connected to VDRIVE.
Position B: Connected to GND.
LK21 U5 AD780 Voltage Output Selection
Inserted: Output is 3V.
Removed: Output is 2.5V.
LK22
CONVST_A / CONVST_B Link Selection
Connects CONVST_A to CONVST_B when inserted.
LK23
RD Source Signal Selection
Position A: Controlled by EVAL-SDP1Z.
Position B: Connected to external socket J7-3.
LK24
REFCAPA Source Selection
Inserted: External Reference connected
Removed: External Reference disconnected.
LK25
DB10 / SDATA_C Destination Selection
Position A: data to EVAL-SDP1Z.
Position B: data to external socket J7-6.
LK26
DB7 / HBEN / DCEN Selection
Position A: data to EVAL-SDP1Z.
Position B: Connected to VDRIVE.
Position C: Connected to GND.
LK27
DB9 / SDATA_B Destination Selection
Position A: data to EVAL-SDP1Z.
Position B: Not used
Position C: data to external socket J7-5.
LK28 DB8 / SDATA_C Destination Selection
Position A: data to EVAL-SDP1Z.
Position B: Not used
Position C: data to external socket J7-4.
LK29 DB14/REFBUF/DIS EN Selection
Position A: data to EVAL-SDP1Z.
Position B: Connected to VDRIVE.
Position C: Connected to GND.
LK30 DB6 / SCLK Selection
Position A: Connected to EVAL-SDP1Z.
Position B: Not used
Position C: Connected to external socket J7-11.

UG-AD7656-1/57-1/58-1 Evaluation Board User
Guide
Rev. PrA | Page 8 of 32
Link No. Function
LK31
DB2 / SEL_C Selection
Position A: data to EVAL-SDP1Z.
Position B: Connected to VDRIVE.
Position C: Connected to GND.
LK32
DB1 / SEL_B Selection
Position A: data to EVAL-SDP1Z.
Position B: Connected to VDRIVE.
Position C: Connected to GND.
LK33
DB0 / SEL_A Selection
Position A: data to EVAL-SDP1Z.
Position B: Connected to VDRIVE.
Position C: Connected to GND.
LK34
CONVST_B Selection
Position A: Connected to external socket J7-9.
Position B: Controlled by EVAL-SDP1Z.
Position C: Connected to GND.
LK35
CONVST_C Selection
Position A: Connected to external socket J7-10.
Position B: Controlled by EVAL-SDP1Z.
Position C: Connected to GND.
LK36
CONVST_A / CONVST_C Link Selection
Connects CONVST_A to CONVST_C when inserted.
LK1011
Op Amp negative rail source Selection
Position A: -12V supplied from on board supply
Position B: negative rail supplied from external source via J100 terminal 1
LK1021
Op Amp positive rail source Selection
Position A: 12V supplied from on board supply
Position B: positive rail supplied from external source via J100 terminal 3
LK103
LK104
LK105
LK106
Sets the VDD and VSS levels when using the onboard supplies
Link ±12V ±15V
LK103 POP NOPOP
LK104 NOPOP POP
LK105 NOPOP POP
LK106 POP NOPOP
POP = Place both 0Ω resistors.
NOPOP = Neither 0Ω resistor is placed.
LK701 DVCC Selection
Position A: DVCC supplied from on board 5V supply
Position B: DVCC supplied from external source via J701-1
LK702 AVCC Selection
Position A: AVCC supplied from on board 5V supply
Position B: AVCC supplied from external source via J701-1
SL1 REFCAPA / REFCAPB Link Selection
Connects REFCAPA to REFCAPB when soldered
SL2 REFCAPB / REFCAPC Link Selection
Connects REFCAPB to REFCAPC when soldered
SL3
to
SL14
Not used. Leave unsoldered

Evaluation Board User
Guide UG-AD7656-1/57-1/58-1
Rev. PrA | Page 9 of 32
Link No. Function
SL15
V1 Buffer Selection
Position A: Input signal buffered through U4
Position B: Input signal taken directly from J1
SL16
V2 Buffer Selection
Position A: Input signal buffered through U7
Position B: Input signal taken directly from J2
SL17
V3 Buffer Selection
Position A: Input signal buffered through U8
Position B: Input signal taken directly from J3
SL18
V4 Buffer Selection
Position A: Input signal buffered through U9
Position B: Input signal taken directly from J4
SL19
V5 Buffer Selection
Position A: Input signal buffered through U11
Position B: Input signal taken directly from J5
SL20
V3 Buffer Selection
Position A: Input signal buffered through U12
Position B: Input signal taken directly from J6
1 Both LK101 and LK102 should always be in corresponding positions.
Table 2 Link Options -Setup condition
Link No. Position Function
LK1 A Software input selected
LK2 A VREF not buffered
LK3 A Connected to EVAL-SDP1Z
LK4 IN V1 input grounded
LK5 IN V2 input grounded
LK6 B
Input range set to ±4 × VREF ( Over ridden by control registers in software )
LK7 A Normal operation selected
LK8 C Connected to EVAL-SDP1Z
LK9 B Word mode selected
LK10 A Connected to EVAL-SDP1Z
LK11 B Connected to EVAL-SDP1Z
LK12 A Connected to EVAL-SDP1Z
LK13 A VREF sourced from AD780
LK14 IN V3 input grounded
LK15 IN V4 input grounded
LK16 A VDRIVE =3.3V from EVAL-SDP1Z supply
LK17 IN V5 input grounded
LK18 IN V6 input grounded
LK19 OUT External VREF disconnected
LK20 B Parallel mode selected
LK21 OUT AD780 VOUT = 2.5V
LK22 OUT
CONVST_A & CONVST_B not linked
LK23 A Connected to EVAL-SDP1Z
LK24 OUT External VREF disconnected
LK25 A Connected to EVAL-SDP1Z

UG-AD7656-1/57-1/58-1 Evaluation Board User
Guide
Rev. PrA | Page 10 of 32
LK26 A Connected to EVAL-SDP1Z
LK27 A Connected to EVAL-SDP1Z
LK28 A Connected to EVAL-SDP1Z
LK29 A Connected to EVAL-SDP1Z
LK30 A Connected to EVAL-SDP1Z
LK31 A Connected to EVAL-SDP1Z
LK32 A Connected to EVAL-SDP1Z
LK33 A Connected to EVAL-SDP1Z
LK34 B Connected to EVAL-SDP1Z
LK35 B Connected to EVAL-SDP1Z
LK36 OUT
CONVST_A CONVST_C not linked
LK1011 A Onboard op amp power used
LK1021 A Onboard op amp power used
LK103
LK104
LK105
LK106
NOPOP
POP
POP
NOPOP
Op amp supply rails set to ±15V
LK701 A Onboard DVCC used
LK702 A Onboard AVCC used
SL1 OUT REFCAPA & REFCAPB not linked
SL2 OUT REFCAPB & REFCAPC not linked
SL3 to
SL14
OUT Not used
SL15 A Input buffered
SL16 A Input buffered
SL17 A Input buffered
SL18 A Input buffered
SL19 A Input buffered
SL20 A Input buffered

Evaluation Board User
Guide UG-AD7656-1/57-1/58-1
Rev. PrA | Page 11 of 32
POWER SUPPLIES
Care should be taken before applying power and signals to the
evaluation board to ensure that all link positions are as required
by the operating mode.
When using the EVAL-AD7656-1/57-1/58-1SDZ in
conjunction with the EVAL-SDP-CB1Z board, connect the 9V
DC supply to connector J702. VDD, VDRIVE and op amp
supplies are generated on-board.
Each supply is decoupled on the EVAL-AD7656-1/57-1/58-
1SDZ . A single ground plane is used on this board to minimize
the effect of high frequency noise interference.
Table 3. External Power Supply Required
POWER
SUPPLY
VOLTAGE
RANGE
PURPOSE
VIN1
J702
7V to 9V Supplies all onboard power supplies
which generate all required voltages
to run the evaluation board
VDD
J100
+12V to
+16.5V
Amplifier positive rail
VSS
J100
-12V to
-16.5V
Amplifier negative rail
AVCC
J703
2.7V to
5.25V
ADC analog supply.
DVCC
J701
2.7V to
5.25V
ADC digital supply.
1. When this is supplied all other power supplies are available onboard.
If this supply is not used then all other supplies must be sourced from
an external source.
PARALLEL INTERFACE
The AD7656-1/57-1/58-1 uses a high-speed parallel interface,
which allows sampling rates up to 250kSPS. For details on the
operation of the serial bus, refer to the AD7656-1/57-1/58-1
datasheet.
The EVAL-AD7656-1/57-1/58-1SDZ uses the parallel interface
to transfer data to the EVAL-SDP-CB1Z.
SERIAL INTERFACE
Connection to the serial interface is also possible in standalone
mode via socket J7. For details on the operation of the serial
bus, refer to the AD7656-1/57-1/58-1 datasheet.
DIGITAL INTERFACE
The EVAL-AD7656-1/57-1/58-1SDZ communicates with the
EVAL-SDP-CB1Z board using level shifters. The EVAL-SDP-
CB1Z operates at a 3.3V logic level. This allows VDRIVE
voltages to exceed 3.3V to be used without damaging the
EVAL-SDP-CB1Z interface.
ANALOG INPUTS
Inputs V1 to V6 allow signals to be connected to the board via
SMB connectors.
The analog inputs on the EVAL-AD7656-1/57-1/58-1SDZ are
filtered and buffered by AD8597: Ultralow Distortion, Ultralow
Noise (single) Op Amps. Further filtering is provided by an R-
C filter directly before the AD7656-1/57-1/58-1 inputs.
Alternatively, the op amps may be bypassed and the inputs fed
directly to the AD7656-1/57-1/58-1 via the R-C filter.
REFERENCE OPTIONS
2 on board reference supplies are available. ADR431: Ultralow
Noise XFET® Voltage References with Current Sink and Source
Capability, AD780: 2.5 V/3.0 V Ultrahigh Precision Bandgap
Voltage Reference. Alternatively, the AD7656-1/57-1/58-1 can
supply an internal reference voltage.

UG-AD7656-1/57-1/58-1 Evaluation Board User
Guide
Rev. PrA | Page 12 of 32
SOCKETS/CONNECTORS
Table 4 Socket connector functions
Socket Function
VIN0 Analog input VIN0.
Buffered to VIN0 on AD7656-1/57-1/58-1.
VIN1 Analog input VIN1.
Buffered to VIN1 on AD7656-1/57-1/58-1.
VIN2 Analog input VIN2.
Buffered to VIN2 on AD7656-1/57-1/58-1.
VIN3 Analog input VIN3.
Buffered to VIN3 on AD7656-1/57-1/58-1.
J1
VIN.
Apply a bipolar signal to this pin. This signal
will be biased up on J3
J2 Socket for SDP1Z evaluation control board.
J3 VIN BIASED
Unipolar version of signal applied to J1
J5 VREF
External reference voltage
J8 VDRIVE
External screw connection for VDRIVE.
J9
Analog inputs VIN4 - VIN15.
Buffered to VIN4 - VIN15 on AD7656-1/57-
1/58-1.
VIN15 AGND
VIN14 AGND
VIN13 AGND
VIN12 AGND
VIN11 AGND
VIN10 AGND
VIN9 AGND
VIN8 AGND
VIN7 AGND
VIN6 AGND
VIN5 AGND
VIN4 AGND
VIN3 AGND
VIN2 AGND
VIN1 AGND
VIN0 AGND
J100
Op amp power supply screw terminal
connectors.
Supply rails for op amps.
J700 7V to 9V DC screw terminal connector
J702 7V to 9V DC transformer power connector.
J703 VDD screw terminal connector..

Evaluation Board User
Guide UG-AD7656-1/57-1/58-1
Rev. PrA | Page 13 of 32
EVAL-AD7656-1/57-1/58-1SDZ BASIC
HARDWARE SETUP
The AD7656-1/57-1/58-1 evaluation board connects to the
(EVAL-SDP-CB1Z) System Demonstration Board. The EVAL-
SDP-CB1Z Board is the controller board, which is the
communication link between the PC and the main evaluation
board. Error! Reference source not found. shows a photograph
of the connections made between the AD7656-1/57-1/58-1
daughter board and the EVAL-SDP-CB1Z board.
Before connecting power, connect the EVAL-AD7656-1/57-
1/58-1SDZ board to connector A or connector B on the EVAL-
SDP-CB1Z board. Nylon screws are included in the EVAL-
AD7656-1/57-1/58-1SDZ evaluation kit and can be used to
ensure the EVAL-AD7656-1/57-1/58-1SDZ board and the
EVAL-SDP-CB1Z board are connected firmly together.
Once the EVAL-AD7656-1/57-1/58-1SDZ board and the EVAL-
SDP-CB1Z board are connected securely, connect the power
supplies on the EVAL-AD7656-1/57-1/58-1SDZ board. The
EVAL-AD7656-1/57-1/58-1SDZ requires an external power
supply which is included in the evaluation board kit. Connect
this power supply to the connector J702 on the EVAL-AD7656-
1/57-1/58-1SDZ board. Further details on the required power
supplies connections and options are detailed in Table 3
Before connecting the EVAL-SDP-CB1Z board to your
PC, ensure that the AD7366/67 software has been
installed from the enclosed CD. The full software
installation procedure is detailed in the
e section.
Finally connect the EVAL-SDP-CB1Z board to the PC via the
USB cable enclosed in the EVAL-SDP-CB1Z kit. If using
Windows XP platform, you may need to search for the EVAL-
SDP-CB1Z drivers. Choose to automatically search for the
drivers for the EVAL-SDP-CB1Z board if prompted by the
operating system.

UG-AD7656-1/57-1/58-1 Evaluation Board User
Guide
Rev. PrA | Page 14 of 32
EVALUATION BOARD SOFTWARE
SOFTWARE INSTALLATION
The EVAL-AD7656-1/57-1/58-1SDZ evaluation kit includes
software on a CD. Click the setup.exe file from the CD to run
the install. The default location for the software is
C:\Program Files\Analog Devices\AD7656-1_57-1_58-1
Note:
Install the evaluation software before connecting the
evaluation board and EVAL-SDP-CB1Z board to the USB
port of the PC to ensure that the evaluation system is correctly
recognized when connected to the PC.
There are two parts to the install:
AD7656-1/57-1/58-1 Evaluation board software
Install.
EVAL-SDP-CB1Z System Demonstration Platform
Board Drivers install
Figure 3 to Figure 7 show the separate stages of the AD7656-
1/57-1/58-1 evaluation software. Figure 8 to Figure 12 show the
separate steps to install the EVAL-SDP-CB1Z drivers. Proceed
through all of the installation steps allowing the software and
drivers to be placed in the appropriate locations.
Only after the software and drivers have been installed
should you connect the EVAL-SDP-CB1Z board to the PC.
Figure 3. AD7656-1/57-1/58-1 Install Window 1
Figure 4 AD7656-1/57-1/58-1.Install Window 2
Figure 5 Install Window 3
Figure 6. AD7656-1/57-1/58-1 Install Window 4

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Figure 7. AD7656-1/57-1/58-1 Install Window 5.
Figure 8. ADI EVAL-SDP-CB1Z Drivers Setup Window 1.
Figure 9. ADI EVAL-SDP-CB1Z Drivers Setup Window 2.
Figure 10. ADI EVAL-SDP-CB1Z Drivers Setup Window 3
Figure 11. ADI EVAL-SDP-CB1Z Drivers Setup Window 4
Figure 12. ADI EVAL-SDP-CB1Z Drivers Setup Window 5

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After installation from CD is complete, connect the EVAL-
AD7656-1/57-1/58-1SDZ to the EVAL-SDP-CB1Z as described
in the Evaluation Board Hardware section.
When you first plug in the EVAL-SDP-CB1Z board via the USB
cable provided, allow the new Found Hardware Wizard to run.
Once the drivers are installed, you may check that the board
has connected correctly by looking at the Device Manager of
the PC. The Device Manager can be found by right clicking on
My Computer->Manage ->Device Manager from the list of
System Tools as shown below. The EVAL-SDP-CB1Z Board
should appear under ADI Development Tools. This completes
the installation.
.
Figure 13. Device Manager
LAUNCHING THE SOFTWARE
Once the EVAL-AD7656-1/57-1/58-1SDZ and EVAL-SDP-
CB1Z are correctly connected to your PC, the AD7656-1/57-
1/58-1 software can be launched.
To launch the software, complete the following steps:
1. From the Start menu, select Programs ->Analog Devices -
> AD7656-1/57-1/58-1. The main window of the software
then displays.
2. If the AD7656-1/57-1/58-1 evaluation system is not
connected to the USB port via the EVAL-SDP-CB1Z when
the software is launched, a connectivity error displays (see
Figure 14). Connect the evaluation board to the USB port
of the PC, wait a few seconds, click Rescan, and follow the
instructions.
09726-002
Figure 14. Connectivity Error Alert
SOFTWARE OPERATION
When the software is launched, the panel will open and the
software will look for hardware connected to the PC. The
software will detect the generic attached to the PC and return
this in a user dialog box.
The user software panel will then launch as shown in Figure 15.

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Figure 15. Setup Screen
DESCRIPTION OF USER SOFTWARE PANEL
The user software panel as shown in Figure 15 has the following
features:
1. File menu with choice of;
a. Load data: load previously captured data in tsv (tab
separated values) format for analysis
b. Save Data as .tsv: Save captured data in tsv (tab separated
values) format for future analysis
c. Print Front Panel Picture. Use to print the front panel to
your default printer.
d. Save Picture: Use to save the current screen capture
e. Exit
2. Use this drop down menu to select the generic AD656-1,
AD7657-1 or AD7658-1. Resolution of selected part is
displayed
3. Voltage range. Use this in conjunction with hardware
settings.
4. Sampling Rate. The default sampling frequency will match
the max sample rate of the ADC selected from the drop
down menu. User can adjust the sampling frequency,
however there are limitations around the sample frequency
where unusable sample frequencies are input, the software
will automatically adjust the sample frequency accordingly.
Units can be entered such as 10k for 10,000Hz etc. As the
max sample frequency possible is device dependent, with
some of the ADCs capable of operating up to 250ksps,
while others can run to 1.3MSPS, the software will match
the particular ADC ability. If the user enters a value larger
than the ability of the existing device, the software will
indicate this and revert to the max Sample frequency.
5. Exit Button. Use this to exit the software. Alternatively
, go to File->Exit

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6. There are four tabs available displaying the data in different
formats, this are listed here and described in more detail
later.
a. Waveform tab
b. Histogram
c. FFT
d. Summary
7. Select the number of samples to analyze.
8. “Sample” : to perform a single capture.
9. “Continous” : to perform a continuous capture from the
ADC. Press a second time to stop sampling
10. This LED indicates when a read is in progress from the
EVAL-SDP-CB1Z board.
11. Channel display buttons. Use these to display multiple
channel reads on the display. NOTE. For FFT analysis
select only one channel
Within any of the Chart panels, the following tools allow user
control of the different chart displays.
Is used for controlling the cursor if present
Is used for zooming in and out.
Is used for panning.

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Figure 16. Waveform Capture Tab
WAVEFORM CAPTURE
Figure 16 illustrates the waveform capture tab. The input signal
here is a 10 kHz sine-wave.
The waveform analysis reports back the amplitudes recorded
from the captured signal in addition to the frequency of the
signal tone.

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Figure 17. Histogram Capture Tab
AC TESTING - HISTOGRAM
Figure 17 shows the histogram capture tab. This tests the ADC
for the code distribution for AC input and computes the mean
and standard deviation, or transition noise of the converter and
displays the results.
Raw data is captured and passed to the PC for statistical
computations. To perform a histogram test, select “Histogram”
tab from the test selection window and click on the “Start”
button.
Note: an AC histogram needs a quality signal source applied to
the input SK1/SK3 connectors. Figure 17 shows the histogram
for a 10kHz sinewave applied to the ADC input and the results
calculated.
1. Illustrates the different measured values for the data
captured.
DC TESTING - HISTOGRAM
More commonly, the histogram would be used for DC testing.
Where user tests the ADC for the code distribution for DC
input and computes the mean and standard deviation, or
transition noise of the converter and displays the results. Raw
data is captured and passed to the PC for statistical
computations. To perform a histogram test, select “Histogram”
tab from the test selection window and click on the “Start”
button.