Low Power, Programmable
Impact Sensor and Recorder
ADIS16240
FEATURES
Digital triple-axis accelerometer, 19 g
Programmable event recorder
Internal and external trigger inputs
Low power operation
Sleep mode current: 100 μA
FUNCTIONAL BLOCK DIAGRAM
AN
VDD
POWER
MANAGEMENT
ADIS16240
TRIPLE-AXIS
MEMS
ACCELEROMETER
CS
XA
YA
ZA
SCLK
DIN
Continuous sampling current: 1 mA, 1 kSPS
Wake-up and record function
DIGITAL
CONTROL
AND
SPI
INTERFACE
ANALOG-
TO-DIGITAL
CONVERSION
AND
DOUT
External trigger input and SPI trigger command
Peak acceleration sample-and-hold
Peak XYZ sum-of-squares output
1600 Hz (X, Y) and 550 Hz (Z) sensor bandwidth
Digitally controlled bias correction
Digitally controlled sample rate, up to 4096 SPS
Programmable alarms for condition monitoring
Programmable digital input/output lines
Data-ready output and alarm indicator output
Real-time clock
RST
PROCESSING
DIO1
DIO2
TEMPERATURE
SENSOR
CMP1
CMP2
ALARM
DETECTION
EVENT TRIGGER
EVENT
CAPTURE
BUFFER
Figure 1.
Digitally activated self-test
Embedded temperature sensor
Programmable power management
SPI-compatible serial interface
Auxiliary 10-bit ADC input
Two analog trigger inputs with programmable threshold
Single-supply operation: 2.4 V to 3.6 V
>4000 g powered shock survivability
APPLICATIONS
Crash or impact detection
Condition monitoring of valuable goods
Safety, shut-off sensing
Impact event recording
Security sensing and tamper detection
GENERAL DESCRIPTION
The programmable event recorder offers two trigger modes. The
internal mode monitors continuous sampled data and triggers the
capture, based on the user-defined threshold. The external mode
uses the two comparator inputs and a user-defined threshold to
trigger the event captures. This function also provides user configu-
ration controls for capture length, pretrigger data, and data storage.
Each event is stored with a header that captures temperature, power
supply, and time. Several power management features, including
sleep mode and a wake-up function, enable power optimization
with respect to specific mechanical system requirements.
The ADIS16240 is a fully integrated digital shock detection and
recorder system. It combines industry-leading iMEMS® technology
with a signal processing solution that optimizes dynamic perfor-
mance for low power applications. The triple-axis sensing element
enables shock measurement in all directions, eliminating the need
for additional sensors and complex mechanical structures for
many applications. The digital serial peripheral interface (SPI)
uses four wires and is compatible with most processor platforms.
The SPI interface provides access to sensor data and a set of config-
uration registers that control such operational parameters as
offset bias correction, sample rate, sleep mode, peak detection,
and event capture.
The ADIS16240 is available in a 12 mm × 12 mm laminate-based
ball grid array (BGA) that meets IPC/JEDEC standards for Pb-free
solder reflow processing (J-STD-020C and J-STD-033).
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights ofthird parties that may result fromits use. Specifications subject to change without notice. No
licenseis granted byimplication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
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
©2009 Analog Devices, Inc. All rights reserved.
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