Evaluation Board Hardware; Evaluation Purposes; Power Supplies; Jumper Settings - Analog Devices iMEMS ADXL372 User Manual

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EVALUATION BOARD HARDWARE

The EVAL-ADXL372Z-M provides all of the support circuitry
required to operate the
configurations. Figure 1 shows a typical bench characterization
setup to evaluate the ADXL372.

EVALUATION PURPOSES

There are two purposes for using the EVAL-ADXL372Z-M: to
study the ADXL372 or for secondary development.
Study the ADXL372
The EVAL-ADXL372Z-M is useful to study and evaluate the
ADXL372. The user can view and save the real-time output of
ADXL372 on a PC for the following purposes:
•
Algorithm development
• Power consumption under various work modes
• Power supply changes
• Power supply performance using various supplies
Secondary Development
The EVAL-ADXL372Z-M can be used for secondary
development. The user can experiment and realize various
reference designs, such as a shock detection demonstration.

POWER SUPPLIES

Many of the EVAL-ADXL372Z-M functions are supported by
the USB directly, requiring no other power supply to run the
board. There are on-board dc-to-dc, low dropout (LDO), and
voltage references to adjust the supply for each product on the
evaluation board.

JUMPER SETTINGS

Before powering the board, set the jumper settings/link options
on the evaluation board for the required operating modes. The
functions of the jumpers are described in Table 1.
Table 1. Jumper Settings
Jumper Description
P1 Interface for connecting motherboard and satellite
board.
J1 Interface for sync trigger input. For applications that
require a precisely timed acceleration measurement, the
ADXL372 features an option to synchronize acceleration
sampling to an external trigger. To evaluate this function,
customers need to provide an external trigger signal and
reprogram the
J2 Interface for external clock input.
clock that, by default, is used for clocked internal
operations. To use an external clock, customers need to
provide an external clock and reprogram the
themselves.
JP1 This jumper controls whether to show the INT2 pin status
of the ADXL372
JP2 This jumper controls whether to show the INT1 pin status
of the ADXL372
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ADXL372 in its various modes and
ADXL372 themselves.
ADXL372 has a built-in
ADXL372
with an LED.
with an LED.
EVAL-ADXL372Z-M

EVALUATION BOARD CIRCUITRY

The two key products on the EVAL-ADXL372Z-M are the
accelerometer and the microcontroller.
Accelerometer
The ADXL372 is an ultra low power, 3-axis, ±200 g MEMS
accelerometer that consumes 22 μA at a 3200 Hz output data
rate. The ADXL372
achieve its low power operation, thereby eliminating the risk of
aliasing the sensor output.
In addition to its ultra low power consumption, the
has many features to enable impact detection while providing
system level power reduction. The device includes a deep multi-
mode output FIFO, several activity detection modes, and a
method for capturing only the peak acceleration of overthreshold
events.
Microcontroller
The microcontroller on the EVAL-ADXL372Z-M is the
ADuC7026. It is a fully integrated, 1 MSPS, 12-bit data
acquisition system that incorporates
• High performance, 12-channel, analog-to-digital
converters (ADCs)
• 32-bit MCU
• Flash®/EE memory on a single chip
• Four digital-to-analog converter (DAC) outputs to control
the power supply of the
The development tools, such as the ARMWSD serial
downloader, evaluation version IAR, and evaluation version
Keil, are available online from the
Development Tools
Rev. 0 | Page 8 of 13
User Guide
does not power cycle its front end to
ADXL372
MicroConverter®
page on analog.com.
ADXL372