Datasheet ADIS16240 (Analog Devices)

Low Power, Programmable Impact Sensor and Recorder Data Sheet ADIS16240 FEATURES FUNCTIONAL BLOCK DIAGRAM Digital triple-axis accelerometer, ±19 g AN VDD Programmable event recorder Internal and external trigger inputs POWER ADIS16240 MANAGEMENT Automatic event data storage in nonvolatile flash Low power operation TRIPLE-AXIS CS XA MEMS Sleep mode current: 100 µA SCLK YA ACCELEROMETER ANALOG- DIGITAL DIN Continuous sampling current: 1 mA, 1 kSPS TO-DIGITAL CONTROL ZA DOUT CONVERSION AND Wake-up and record function AND SPI RST PROCESSING INTERFACE External trigger input and SPI trigger command TEMPERATURE DIO1 DIO2 Peak acceleration sample-and-hold SENSOR Peak XYZ sum-of-squares output CMP1 ALARM EVENT DETECTION CAPTURE 1600 Hz (X, Y) and 550 Hz (Z) sensor bandwidth EVENT TRIGGER BUFFER CMP2
001
Digitally controlled sample rate, up to 4096 SPS
08133-
Programmable alarms for condition monitoring
Figure 1.
Programmable digital input/output lines Data-ready output and alarm indicator output Real-time clock 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 ADIS16240 is a ful y integrated digital shock detection and The programmable event recorder offers two trigger modes. The recorder system. It combines industry-leading iMEMS® technology internal mode monitors continuous sampled data and triggers the with a signal processing solution that optimizes dynamic perfor- capture, based on the user-defined threshold. The external mode mance for low power applications. The triple-axis sensing element uses the two comparator inputs and a user-defined threshold to enables shock measurement in al directions, eliminating the need trigger the event captures. This function also provides user configu- for additional sensors and complex mechanical structures for ration controls for capture length, pretrigger data, and data storage. many applications. The digital serial peripheral interface (SPI) Each event is stored with a header that captures temperature, power uses four wires and is compatible with most processor platforms. supply, and time. Several power management features, including The SPI interface provides access to sensor data and a set of config- sleep mode and a wake-up function, enable power optimization uration registers that control such operational parameters as with respect to specific mechanical system requirements. offset bias correction, sample rate, sleep mode, peak detection, The ADIS16240 is available in a 12 mm × 12 mm laminate-based and event capture. bal grid array (BGA) that meets IPC/JEDEC standards for Pb-free solder reflow processing (J-STD-020C and J-STD-033).
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Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Timing Specifications Timing Diagrams Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Sensing Element Data Sampling and Processing User Interface SPI Interface User Registers Capture Basic Operation SPI Write Commands Memory Map Output Data Registers Processing Sensor Data Event Recorder Internal Trigger Setup External Trigger Setup Buffer Memory Configuration Event Organization Reading Event Data Transient Behavior During Capture Operational Control Internal Sample Rate Global Commands Input/Output Lines Offset Adjustment Diagnostics Clock Checksum Flash Memory Endurance Management Applications Information Assembly Interface Printed Circuit Board (PCB) Outline Dimensions Ordering Guide