Analog Devices ADXL345 User Manual

Evaluation Board User Guide

One Technology Way • P. O . Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel : [phone] • Fax : [phone] • www.analog.com

UG-015

iMEMS ADXL345 Inertial Sensor Evaluation System

FEATURES

Ultralow power ADXL345 accelerometer
Inertial sensor evaluation board
Inertial sensor-specific satellite for evaluation
Standard USB cable for power and communications
PC-based graphical user interface (GUI)
Separates DUT from controller for accurate environmental

testing

Figure 1. Inertial Sensor Evaluation System

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GENERAL DESCRIPTION

The iMEMS® ADXL345 inertial sensor evaluation system
is an easy-to-use evaluation tool targeting bench or desktop
characterization of Analog Devices, Inc., inertial sensor products.
The system consists of the inertial sensor evaluation board (ISEB),
or main board, and a satellite board for any Analog Devices
inertial sensor product. The ISEB connects directly to a PC via
its USB, where the USB connection provides both power and
communications to the board. The ISEB then connects to the
satellite board through a ribbon cable. This cable allows the
satellite to be easily manipulated for testing or for being separately
placed into an environmental chamber for temperature or
humidity testing. Separating the boards mitigates corruption
of data due to the temperature and humidity effects of other
components.

The ISEB is a universal main board and is intended to be used
with various satellites of Analog Devices inertial sensors, including
analog and digital accelerometers, as well as gyroscopes. The
different products are evaluated by means of separate GUIs that are
customized for performance and characterization measurements
relevant to the inertial sensor being evaluated.

The EVAL-ADXL345Z-M system contains the ISEB and the
EVAL-ADXL345Z-S satellite. Also included is a USB A to
Mini-B cable to connect the ISEB to a PC and an 18-inch,
20-pin ribbon cable to connect the ISEB to the satellite. A CD
is also included with the necessary drivers and executables to
use the system and to quickly begin evaluating the ADXL345.

Please see the last page for an important warning and disclaimers. Rev. 0 | Page 1 of 12

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TABLE OF CONTENTS

Features .............................................................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Inertial Sensor Evaluation System Setup ....................................... 3

Software Configuration ............................................................... 3

Hardware Configuration ............................................................. 4

Updating/Repairing the ISEB Firmware ................................... 5

Inertial Sensor Evaluation System Graphical User Interface ...... 6

REVISION HISTORY

6/09—Revision 0: Initial Revision

Configuration Tab .........................................................................6

Real-Time Measurement Tab ......................................................7

Interrupt Configuration Tab ........................................................8

Power Consumption Tab ..............................................................9

Temperature Tab ......................................................................... 10

Header Pinout ................................................................................. 11

ESD Caution................................................................................ 11

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Evaluation Board User Guide UG-015

INERTIAL SENSOR EVALUATION SYSTEM SETUP

SOFTWARE CONFIGURATION

Software configuration of the inertial sensor evaluation system
involves installation of USB drivers for the ISEB and National
Instruments LabVIEW® Run-Time and NI-VISA™ Run-Time files.
These are available in the /Drivers/ folder on the packaged CD.

Installing the USB Drivers for the ISEB

To install the USB drivers, follow these steps.

1. Execute the ADI_ISEB_USB_Drivers.exe file located in

/Drivers/ISEB_USB/.

2. Follow the on-screen instructions to install the drivers.

3. Click Continue Anyway when prompted that the drivers

are not tested.

It may be necessary to manually select the correct drivers after
installation. To select the drivers, follow these steps.

1. Connect the USB A to Mini-B cable to the PC and then to

the ISEB. The satellite board does not need to be connected
for this step. New hardware is detected upon completion of
this step.

2. If prompted to install drivers again, click Install from a list

or specific location (Advanced), see Figure 2.

Figure 3. Selection of the Driver to Install

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Figure 2. Found New Hardware Prompt

3. Select Don’t search. I will choose the driver to install.

(see Figure 3) and select ADI Inertial Sensor Evaluation
System from the model list (see Figure 4).

The ISEB should be detected automatically in the Device
Manager as the ADI Inertial Sensor Evaluation System under
the Ports (COM & LPT) selection. It is recommended to open
the Device Manager to verify hardware detection and to record the
communication port associated with the ISEB for use in the GUI.

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Figure 4. Selection of the ADI Inertial Sensor Evaluation System Drivers

Installing the LabVIEW and NI-VISA Run-Time Engines

After installing the USB drivers, install the LabVIEW and NI-VISA
run-time engines. To ensure that the drivers are installed

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properly, it is recommended that you reboot when prompted.

1. Execute the LVRTE851std.exe file located in the /Drivers/

folder.

2. Follow the on-screen instructions to complete installation of

the LabVIEW run-time engine.

3. Reboot the PC.

4. Locate and execute the visa441runtime.exe file located in

the /Drivers/ folder to install the NI-VISA run-time engine.

5. Follow the on-screen instructions to complete the installation.

6. Reboot the PC.

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HARDWARE CONFIGURATION

To configure the hardware, follow these steps:

1. Plug the USB A to Mini-B cable into the PC, if the cable is

not already connected.

2. Connect the ISEB to the USB cable.

If prompted to install the device, see the Software
Configuration section for details on how to install and
select the correct driver.

3. Connect the ISEB to the ADXL345 satellite using the

18-inch, 20-pin ribbon cable. This cable is keyed to prevent
inserting it backwards and causing damage to the system.

4. Connect the ADXL345 satellite to the opposite end of the

ribbon cable.

5. Verify that the jumpers located in the center of the

ADXL345 satellite are configured as shown in Figure 5.

JUMPER

POSITIONS

CONNECTOR

ADXL345

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Figure 5. Correct Jumper Positions for the ADXL345 Satellite

6. Place the ADXL345 ultralow power accelerometer into the

socket on the satellite board.
The Socket Pin 1 Indicator is located inside the socket close
to the hinge, as shown in Figure 6. This pin indicator should
match up with the Pin 1 Indicator on the ADXL345.

7. After positioning the ADXL345 in the socket, firmly close

the socket until it latches.

ADXL345 SOCKET
PIN 1 INDICATO R

ADXL345
ACCELEROMETER
PIN 1 INDICATOR

Figu re 6. Locati on of P in 1 Indicators for the ADXL345 Accelerometer and Socket

The inertial sensor evaluation system should now be set up and
ready to use.

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