Analog Devices EVAL-AD7276SDZ User Manual
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Analog Devices EVAL-AD7276SDZ User Manual

Analog Devices EVAL-AD7276SDZ User Manual

Evaluating the ad7276, 3 msps, 12-bit adc
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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

FEATURES

Full featured evaluation board for the
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-AD7276SDZ
evaluation board
Evaluation software CD for the
9 V mains power supply adapter

ADDITIONAL EQUIPMENT NEEDED

EVAL-SDP-CB1Z
system demonstration platform, includes a
USB cable
Precision analog signal source
SMB cables
PC running Windows XP SP2, Windows Vista, or Windows 7
with USB 2.0 port

ONLINE RESOURCES

Documents
AD7276
data sheet
EVAL-AD7276SDZ
user guide
Required Software
EVAL-AD7276SDZ
evaluation software
VIN
VIN
UNBIASED
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Evaluating the AD7276, 3 MSPS, 12-Bit ADC
AD7276
AD7276

FUNCTIONAL BLOCK DIAGRAM

VCC
GND
ADP1613
VAMP–
GND
OP AMP
SUPPLIES
VAMP+
ADA4000-1
BUFFER
V
IN
ADA4000-1
BUFFER
BIAS-UP
CIRCUIT
AD8022
EVAL-AD7276SDZ
EVAL-AD7276SDZ User Guide

GENERAL DESCRIPTION

The
EVAL-AD7276SDZ
be used to easily evaluate all features of the AD7276. The
is a 12-bit, high speed, low power successive approximation ADC.
The part operates from a single 2.35 V to 3.6 V power supply and
features throughput rates of up to 3 MSPS. The part contains a
low noise, wide bandwidth track-and-hold amplifier that can
handle input frequencies greater than 55 MHz.
The evaluation board can be controlled via the system demon-
stration platform (SDP). The
the evaluation board to be controlled via the USB port of a PC
using the
AD7276
generates all required power supplies on board and supplies power
to the
EVAL-SDP-CB1Z
include the following:
AD8022: dual high speed, low noise op amp
ADA4000-1: single, low cost, precision JFET input operational
amplifier
AD780: 2.5 V/3.0 V ultrahigh precision band gap voltage
reference
ADP1613: step-up PWM dc-to-dc switching converter
ADP1720: 50 mA, high voltage, micropower linear regulator
ADP7104: 20 V, 500 mA, low noise, CMOS LDO
ADM1185: quad voltage monitor and sequencer
ADG3308: low voltage, 1.15 V to 5.5 V, 8-channel bidirectional
logic level translator
VIN GND
ON-BOARD
POWER SUPPLIES
ADM1185
POWER
SEQUENCER
ADP7104
±5V
SDP +5V
ADP1720
+3.3V
AD780
REF
V
DD
CS
SCLK
ADG3308
SDATA
AD7276
LEVEL
SHIFTER
GND
Figure 1.
Rev. 0 | Page 1 of 20
is a full featured evaluation board that can
EVAL-SDP-CB1Z
evaluation software. The
controller board. On-board components
VIN
+
7V TO
9V
–
DC
INPUT JACK
5V
BF527
DSP
SERIAL
INTERFACE
48MHz
SCLK
EVAL-SDP-CB1Z
CONTROLLER
BOARD
UG-450
AD7276
board allows
EVAL-AD7276SDZ

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Summary of Contents for Analog Devices EVAL-AD7276SDZ

  • Page 1: Features

    EVAL-AD7276SDZ User Guide UG-450 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 AD7276, 3 MSPS, 12-Bit ADC FEATURES GENERAL DESCRIPTION EVAL-AD7276SDZ is a full featured evaluation board that can...

  • Page 2: Table Of Contents

    UG-450 EVAL-AD7276SDZ User Guide TABLE OF CONTENTS Features ....................1 Evaluation Board Circuitry ............11 Evaluation Kit Contents ..............1 Analog Inputs ................11 Additional Equipment Needed ............1 Reference Options ..............11 Online Resources ................1 Sockets/Connectors ..............11 General Description .................

  • Page 3: Getting Started

    EVAL-AD7276SDZ User Guide UG-450 GETTING STARTED the evaluation board kit to ensure that the boards are QUICK START STEPS connected firmly together. To begin using the evaluation board, do the following: Connect the 9 V power supply adapter included in the...

  • Page 4: Software Installation Procedures

    UG-450 EVAL-AD7276SDZ User Guide SOFTWARE INSTALLATION PROCEDURES Select the location to install the software, and then click Next. EVAL-AD7276SDZ evaluation kit includes a CD containing software to be installed on your PC before you begin using the evaluation board. There are two parts to the installation: •...
  • Page 5 EVAL-AD7276SDZ User Guide UG-450 A summary of the installation is displayed. Click Next to Installing the EVAL-SDP-CB1Z System Demonstration Platform Board Drivers continue. After the installation of the evaluation board software is complete, a welcome window is displayed for the installation of the...
  • Page 6 UG-450 EVAL-AD7276SDZ User Guide Click Install to confirm that you would like to install the Before using the evaluation board, you must restart your drivers. computer. A dialog box opens, giving you the following options: Restart, Shut Down, Restart Later. Click the appropriate button.

  • Page 7: Evaluation Board Setup Procedures

    EVAL-AD7276SDZ User Guide UG-450 EVALUATION BOARD SETUP PROCEDURES Configuring the Evaluation and SDP Boards Connect the EVAL-AD7276SDZ board to Connector A or AD7276 evaluation board connects to the EVAL-SDP- Connector B of the EVAL-SDP-CB1Z board (see Figure 2). CB1Z system demonstration board. The...

  • Page 8: Evaluation Board Hardware

    UG-450 EVAL-AD7276SDZ User Guide EVALUATION BOARD HARDWARE POWER SUPPLIES AD7276 DEVICE DESCRIPTION EVAL-AD7276SDZ can be used in two modes: SDP AD7276 can interface to microprocessors or DSPs. controlled mode and standalone mode (see the Modes of The input signal is sampled on the falling edge of CS , and the Operation section for more information).

  • Page 9: Link Configuration Options

    EVAL-AD7276SDZ User Guide UG-450 LINK CONFIGURATION OPTIONS There are multiple jumper (LKx) options that must be set the evaluation board. The evaluation board can be operated in correctly to select the appropriate operating setup before you SDP controlled mode to be used with the SDP board, or the begin using the evaluation board.
  • Page 10 UG-450 EVAL-AD7276SDZ User Guide Link No. Position Function Inserted The U5 output voltage is 3.0 V. Inserted The V unbiased input impedance is 51 Ω. The CS signal is connected to EVAL-SDP-CB1Z. Inserted The biased-up input signal is connected to the U7 input buffer.

  • Page 11: Evaluation Board Circuitry

    EVAL-AD7276SDZ User Guide UG-450 EVALUATION BOARD CIRCUITRY SOCKETS/CONNECTORS ANALOG INPUTS Two analog input options are available for the EVAL-AD7276SDZ: Table 6. Socket/Connector Functions Socket Function • VIN (J7)—for use with a unipolar signal source PWR. A 7 V to 9 V dc transformer power connector.

  • Page 12: Modes Of Operation

    UG-450 EVAL-AD7276SDZ User Guide MODES OF OPERATION connected to the digital interface using the SMB connectors as SDP CONTROLLED MODE described in Table 7. AD7276 uses a high speed serial interface that allows sampling rates of up to 3 MSPS. For more information about Table 7.

  • Page 13: How To Use The Software For Evaluating The Ad7276

    Procedures and Evaluation Board Setup Procedures sections, set up the system for data capture as follows: From the Start menu, select Programs > Analog Devices > EVAL-AD7276_77_78SDZ > AD7276. The main Allow the Found New Hardware Wizard to run after the window of the software then displays.
  • Page 14 UG-450 EVAL-AD7276SDZ User Guide CONTROL CONTROL CONTROL CURSOR ZOOMING PANNING NOTES 1. FOR DETAILS ABOUT THE AREAS HIGHLIGHTED IN RED, SEE THE OVERVIEW OF THE MAIN WINDOW SECTION. Figure 15. Evaluation Software Main Window Rev. 0 | Page 14 of 20...

  • Page 15: Overview Of The Main Window

    EVAL-AD7276SDZ User Guide UG-450 OVERVIEW OF THE MAIN WINDOW Part Information Box (Section 2) The Part Information box (labeled 2 in Figure 15) displays the The main window of the software is shown in Figure 15 and has generic being evaluated and is for informational purposes only.

  • Page 16: Generating A Waveform Analysis Report

    UG-450 EVAL-AD7276SDZ User Guide GENERATING A WAVEFORM ANALYSIS REPORT Figure 18 illustrates the waveform capture tab for a 50 kHz sine wave input signal. The Waveform Analysis area (labeled 1 in Figure 18) reports the amplitudes recorded from the captured signal and the frequency of the signal tone.

  • Page 17: Generating A Histogram Of The Adc Code Distribution

    EVAL-AD7276SDZ User Guide UG-450 GENERATING A HISTOGRAM OF THE ADC CODE DC Input DISTRIBUTION A histogram test of dc input can be performed with or without an external source because the evaluation board has a buffered The Histogram tab can be used to perform ac testing or, more /2 source at the ADC input.

  • Page 18: Generating A Fast Fourier Transform Of Ac Characteristics

    UG-450 EVAL-AD7276SDZ User Guide Click the FFT tab from the main window. GENERATING A FAST FOURIER TRANSFORM OF Click Sample. AC CHARACTERISTICS As in the histogram test, raw data is then captured and passed Figure 20 shows the FFT tab. This feature tests the traditional...

  • Page 19: Generating A Summary Of The Waveform, Histogram, And Fast Fourier Transform

    EVAL-AD7276SDZ User Guide UG-450 GENERATING A SUMMARY OF THE WAVEFORM, HISTOGRAM, AND FAST FOURIER TRANSFORM Figure 21 shows the Summary tab. The Summary tab captures all the display information and provides it in one panel with a synopsis of the information, including key performance parameters such as SNR and THD.

  • Page 20: Related Links

    By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement.

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