DATASHEET and Circuit Diagram

Here we provide you with a guideline for soldering and mounting the LGA package inertial sensors since MEMS based sensors (analog and digital output accelerometer) are sensitive to PCB reflow processes and suggested methods of soldering to the PCB for consumer applications.

You will be taken into the overview of soldering considerations, PCB mounting recommendations, enriched with illustrations for such recommended PCB land pattern for the LGA Package, Correct/Incorrect PCB Top Metal Pattern Under Package, PCB Land Pad, Solder Mask, and Signal Trace Near Package Design, and a detailed dimensions for corner pads illustrations are sections you can find in the detailed read of this article.

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If you looking for a feature-rich power monitoring device that suits on a wide variety automotive, telecom, and industrial applications you may consider this LTC4151IC from Linear Technology. This power monitor device provides accurate voltage and current monitoring of positive supply rail from 7V to 80V through a simple I2C interface, according to the datasheet.

Such in automotive which has monitoring power in high transient environment, this device is suitable for that purpose as well the high input voltage of the LTC4151. You can see the above circuit schematic, it shows that the device monitoring up to 16A through a 5mOhms sense resistor at an accessory socket and feeding data via I2C microcontroller. And a portable GPS unit is used to illustrate the principle.

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If you need to look for a suitable transformer design for non-lead materials, a nonlead Piezoelectric Transformers, you may consider the folowing article that contain various transformer structures description. Piezoelectric transformers are now widely used in applications such as backlight inverters, AC-DC converters, car navigation system, LCDs for small screen devices and etc.

In the depth of the article there are informations about the piezoelectric transformer advantages, examples of transformer designs (Radial Transversal mode transformer, Longitudinal-Transversal mode transformer, Ring type transformer, and Unipoled transformer) including the schematic diagram of those transformers type.

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SCA3000-D01 is a proven capacitive 3D-MEMS technology of 3-axis Low Power Accelerometer with digital SPI interface. This accelerometer is targeted to be used to the battery operated devices such as Inertial navigation, digital inclinometers, electronic compass, and Motion activated functions in mobile terminals and antitheft systems.

The SCA3000-D01 has 18 pins on it, their PIN descriptions are pin1 NC (not connected), pin 2 XRESET (external reset, active low), pin 3 INT (interupt output), pin 4 CLK (digital ground), pin 5 DVSS (digital ground), pin 6 DVDD (digital supply), pin 7 DVIO (digital I/Osupply), pin 8 CSB (chip select), pin 9 NC (not connected), pin 10 NC (not connected), pin 11 SCK SCL (SPI serial clock/SCK), pin 12 MISO_SDA (SPI data out/MISO), pin 13 MOSI (SPI data in/MOSI), pin 14 AVDD (analog supply), pin 15 AVSS (analog ground), pin 16 AVSS (analog ground), pin 17 ATSTIO (not connected), pin 18 NC (not connected).

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When it comes to very weak GPS signal that you’ve got, the position accuracy derived from GPS receiver might be  lower  than required. You will need to use an external sensors such accelerometers, gyroscopes, odometers, and etc to have anavailability and reliability of weak GPS signal. The following article describe you with the using of 3D MEMS accelerometer and one MEMS gyroscope which is integrated in a GPS based car navigation system.

According to the article, the major goal of setting up this system is bridge brief up to 30 seconds GPS outages, 5 Hz continuous and smooth delivery output of position, velocity and heading, filter out bad GPS position and velocity measurement. You will be taken then to the system configuration section that use ADXRS150 yaw rate gyro and SCA3000 3D accelerometer, MEMS sensor selection, the error model for accelerometers and gyro, the error model for GPS, Implementation of the Kalman Filter, System alignment and calibration, and Experimental System performance results.

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Below is the electrical connection schematic of LIS302DL, an MEMS motion sensor 3-axis – ± 2g/± 8g smart digital output “piccolo” accelerometer which capable to measure accelerations of 100Hz or 400 Hz output data rate. LIS302DL can be applied for a variety of applications such Free-fall detection, Motion activated functions, Gaming and virtual reality input devices, Vibration monitoring and compensation.

Through the I2C/SPI interface, you can see functionality of the LIS302DL and then measure the acceleration data since this device has selectable and accessible functions through the interface. Please high-tied of the CS when you use the I2C, according to the datasheet. You can also completely program the functions, the threshold and the timing of the two interrupt pins (INT 1 and INT 2) through the same interface.

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