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ADXL362 Arkusz danych(PDF) 5 Page - Analog Devices |
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ADXL362 Arkusz danych(HTML) 5 Page - Analog Devices |
5 / 6 page Circuit Note CN-0274 Rev. A | Page 5 of 6 Figure 3. Photo of EVAL-CN0274-SDPZ PCB COMMON VARIATIONS The maximum continuous operating current of the ADP195 is fixed at 1.1 A. For applications requiring more downstream power, a higher current rated switch can be used in place of the ADP195. By sacrificing approximately 15 µA of quiescent current, the ADP197 is capable of providing 3 A of current to downstream circuitry. For applications requiring less downstream power, the ADP190 can be used. It has a continuous current of 500 mA and is available in a smaller WLCSP package than the ADP195. A second variant of the provided solution is to create a free fall detection system. This function can be implemented using the inactivity interrupt. When an object is in true free-fall, acceleration on all axes is 0 g. Thus, free-fall detection is achieved by looking for acceleration on all axes to fall below a certain threshold (close to 0 g) for a certain amount of time. The ADXL362 functions as a free-fall detector by setting the inactivity threshold (300 mg to 600 mg) and inactivity time (150 ms to 350 ms). The register setting for these values varies based on the g-range setting of the device. CIRCUIT EVALUATION AND TEST This circuit uses the EVAL-SDP-CS1Z System Demonstration Platform (SDP) evaluation board and the EVAL-CN0274-SDPZ circuit board. The two boards have 120-pin mating connectors, allowing for the quick setup and evaluation of the performance of the circuit. The EVAL-CN0274-SDPZ contains the circuit to be evaluated, as described in this note, and the EVAL-SDP-CS1Z is used with the CN0274 evaluation software to capture the data from the EVAL-CN0274-SDPZ. Because the ADXL362 requires a relatively small amount of power in both the asleep and awake states, it is possible to power the EVAL-CN0274-SDPZ from the digital data lines coming out of the EVAL-SDP-CS1Z. Equipment Needed The following equipment is needed: • A PC with a USB port and Windows® XP or Windows Vista® (32-bit), or Windows® 7 (32-bit) • The EVAL-CN0274-SDPZ evaluation board • The EVAL-SDP-CS1Z evaluation board • The CN0274 Evaluation Software • A power supply: 3.0 V or 2 AAA batteries. Getting Started Load the evaluation software by placing the CN0274 evaluation software CD into the PC. Using My Computer, locate the drive that contains the evaluation software CD and open the Readme file. Follow the instructions contained in the Readme file for installing and using the evaluation software. |
Podobny numer części - ADXL362 |
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Podobny opis - ADXL362 |
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