PDF ADIS16240 Data sheet ( Hoja de datos )

Número de pieza	ADIS16240
Descripción	Low Power Programmable Impact Sensor And Recorder
Fabricantes	Analog Devices
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No Preview Available ! www.DataSheet4U.com FEATURES Digital triple-axis accelerometer, ±19 g Programmable event recorder Internal and external trigger inputs Low power operation Sleep mode current: 100 μA Continuous sampling current: 1 mA, 1 kSPS Wake-up and record function 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 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 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. 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 of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. Low Power, Programmable Impact Sensor and Recorder ADIS16240 FUNCTIONAL BLOCK DIAGRAM AN VDD ADIS16240 POWER MANAGEMENT XA YA ZA CMP1 CMP2 TRIPLE-AXIS MEMS ACCELEROMETER TEMPERATURE SENSOR ANALOG- TO-DIGITAL CONVERSION AND PROCESSING ALARM DETECTION EVENT TRIGGER DIGITAL CONTROL AND SPI INTERFACE EVENT CAPTURE BUFFER Figure 1. CS SCLK DIN DOUT RST DIO1 DIO2 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 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). One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved. 1 page www.DataSheet4U.com ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Acceleration Any Axis, Unpowered Any Axis, Powered VDD to GND Digital Input Voltage to GND Analog Inputs to GND Operating Temperature Range Storage Temperature Range Rating 2000 g 2000 g −0.3 V to +3.6 V −0.3 V to VDD + 0.3 V −0.3 V to VDD + 0.3 V −40°C to +85°C −65°C to +150°C ADIS16240 Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD CAUTION Rev. 0 \| Page 5 of 16 5 Page www.DataSheet4U.com OUTPUT DATA REGISTERS Each output data register uses the bit assignments shown in Figure 19. The ND flag indicates that unread data resides in the register. This flag clears and returns to 0 after reading the register. It returns to 1 after the next internal sample updates the register with new data. When the data-ready function (the DIO1 and DIO2 pins and the MSC_CTRL register; see Table 25) drives data collection, the ND bit is always high and does not require validation. The EA flag indicates that one of the error flags in the DIAG_STAT register (see Table 28) is active (true). MSB FOR 10-BIT OUTPUT ND EA x x x x D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Figure 19. Output Register Bit Assignments Table 8. Output Data Register Formats Register Bits Format SUPPLY_OUT 10 Binary, 0 V = 0x0000 XACCL_OUT 10 Twos complement YACCL_OUT 10 Twos complement ZACCL_OUT 10 Twos complement AUX_ADC 10 Binary, 0 V = 0x0000 TEMP_OUT 10 Binary, 25°C = 0x0133 XPEAK_OUT1 10 Twos complement YPEAK_OUT1 10 Twos complement ZPEAK_OUT1 10 Twos complement XYZPEAK_OUT2 12 Binary, 0 g2 = 0x0000 Scale 4.88 mV 51.4 mg 51.4 mg 51.4 mg VDD/1024 0.244°C 51.4 mg 51.4 mg 51.4 mg 0.676 g2 1 Function requires MSC_CTRL[14] = 1. 2 Function requires MSC_CTRL[15] = 1. Processing Sensor Data Processing sensor data starts with reading the appropriate output data register using the SPI. For example, use DIN = 0x0E00 to read the XPEAK_OUT register. Use the ND and EA bits to validate new data and normal operating status, if necessary. Then mask off all of the nondata bits and calculate the data, using the format and scale information shown in Table 8. For example, XACCL_OUT[9:0] and XYZPEAK_OUT[11:0] contain all relevant data for their function. Table 9, Table 10, and Table 11 provide output code examples for each output register. ADIS16240 Table 9. Accelerometer Data Output Format1 Binary Hex Codes Acceleration 01 0011 0111 0x137 +311 +16 g … ……… 00 0000 0010 0x002 +2 +102.8 mg 00 0000 0001 0x001 +1 +51.4 mg 00 0000 0000 0x000 0 0 11 1111 1111 0x3FF −1 −51.4 mg 11 1111 1110 0x3FE −2 −102.8 mg … ……… 10 1100 1001 0x2C9 −311 −16 g 1 The XACCL_OUT register is located at Address 0x05[15:8] and Address 0x04[7:0]. The YACCL_OUT register is located at Address 0x07[15:8] and Address 0x06[7:0]. The ZACCL_OUT register is located at Address 0x09[15:8] and Address 0x08[7:0]. The XPEAK_OUT register is located at Address 0x0F[15:8] and Address 0x0E[7:0]. The YPEAK_OUT register is located at Address 0x11[15:8] and Address 0x10[7:0]. The ZPEAK_OUT register is located at Address 0x13[15:8] and Address 0x12[7:0]. When MSC_CTRL[14] = 1, the XPEAK_OUT, YPEAK_OUT, and ZPEAK_OUT registers track the peak acceleration in each acceleration output register. When MSC_CTRL[15] = 1, use the following equation to calculate the root mean square (rms) of all three peak registers, where 1 LSB = 0.822 g: XYZrms = XYZPEAK _ OUT Set GLOB_CMD[5] = 1 to reset these registers to 0x0000. Table 10. Power Supply Data Output Format1 Binary Hex Codes Power Supply (V) 10 1110 0010 0x2E2 738 3.6 … ……… 10 1010 0101 0x2A5 677 3.30488 10 1010 0100 0x2A4 676 3.3 10 1010 0011 0x2A3 675 3.29502 … ……… 01 1110 1100 0x1EC 492 2.4 1 The SUPPLY_OUT register is located at Address 0x03[15:8] and Address 0x02[7:0]. Table 11. Temperature Data Output Format1 Binary Hex Codes Temperature (°C) 10 0010 1001 0x229 553 +85°C … … …… 01 0011 0100 0x134 308 +25.244°C 01 0011 0011 0x133 307 +25°C 01 0011 0010 0x132 306 +24.756°C … … …… 00 0010 1001 0x029 41 −40°C 1 The TEMP_OUT register is located at Address 0x0D[15:8] and Address 0x0C[7:0]. Rev. 0 \| Page 11 of 16 11 Page

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