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ADA4571R-EBZ User Guide 

UG-739 

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 

 

ADA4571

 End of Shaft Evaluation Board 

 

FEATURES 

USB 2.0 interface 
Jumper for temperature compensation mode enable 
Jumper for power down mode enable 
Measurement test points and coaxial connectors 

EVALUATION KIT CONTENTS 

ADA4571

 magnetic stimulus: 

Dipole magnet 
Brushed or brushless dc motor with integrated control 
electronics 

Evaluation software CD-ROM (Windows® 7 32-bit and 64-bit 

compatible GUI) 

ADDITIONAL EQUIPMENT NEEDED 

Customer supplied 6 V to 12 V bench supply 
SDP interface board  
USB cable (supplied with SDP interface board) 

 
 

GENERAL DESCRIPTION 

The end of shaft evaluation system is composed of a Windows 
LabVIEW® GUI software, an 

ADA4571

 motherboard, a 

magnetic stimulus mounted on top of a brushless dc motor, a 
daughter board with 

ADA4571

 in its SOIC package, and a USB 

interface and controller board, the SDP-S.  
The motherboard features an on-board 5 V regulator, a 
2-channel simultaneous sampling ADC and jumpers for 
enabling the temperature compensation and power-down 
modes within the 

ADA4571

. The motherboard also features  

test points and unpopulated coaxial connectors for the three 
outputs of the device.  
The daughter board features the 

ADA4571

 mounted above the 

magnetic stimulus as well as test points for the three outputs of 
the device.  
The SDP board is used to control the ADC on the motherboard 
and interface with the GUI. 
 

 

EVALUATION BOARD CONNECTION DIAGRAM 

USB

PC GUI INTERFACE

SDP CONTROL

CARD

EVALUATION

SYSTEM

WITH MAGNETIC

STIMULUS

POWER

SUPPLY

6V TO 12V

SUPPLY

12526-

001

 

Figure 1. 

ADA4571

 End of Shaft Evaluation System 

 

 
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT  
WARNING AND LEGAL TERMS AND CONDITIONS.

 

Rev. 0 | Page 1 of 13 

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Summary of Contents for ADA4571

Page 1: ...tic stimulus mounted on top of a brushless dc motor a daughter board with ADA4571 in its SOIC package and a USB interface and controller board the SDP S The motherboard features an on board 5 V regula...

Page 2: ...2 Getting Started 3 Software Installation Procedures 3 Evaluation Board Hardware 4 Jumper Configuration 4 DUT Outputs 4 How to Use the Software 5 Starting Up the Evaluation GUI 5 Overview of the Main...

Page 3: ...w Installation 4 Click Next to complete installation of the Windows LabVIEW GUI SDP Installation Next install the Analog Devices Inc SDP driver This driver allows the SDP control board to interface wi...

Page 4: ...he ADA4571 is proportional to the voltage applied at this terminal The attached motor provides a more constant rotational speed at lower applied voltages Due to the LabVIEW GUI measuring the linearity...

Page 5: ...to mechanical nonlinearities of the dc motor such as cogging during coil commuting extra errors are introduced to the system at higher rotational velocities For best performance apply 3 V to Ext Motor...

Page 6: ...n Initially all of the figures will be blank To begin press Run see Figure 6 The various output graphs are explained in detail in the following sections There are two different categories of output wa...

Page 7: ...han the inherent offset of the ADA4571 Arc Tangent2 Magnetic Angle The second set of figures are labeled ArcTangent Magnetic Angle see Figure 8 These figures depict the calculated electrical angle of...

Page 8: ...ndle motor rotational speeds as high as 50 000 RPM Figure 9 shows the Uncorrected Angular Error Degrees plot When powered by the host PC USB supply this waveform reports higher error than when powered...

Page 9: ...is constant throughout the entire rotation of the magnetic stimulus The exact radius of this plot is inversely proportional to the temperature of the ADA4571 At lower device temperatures the radius in...

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Page 13: ...of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTIONS Customer may not disassemble decompile or reverse...

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