công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
ADXRS450 bảng dữ liệu(PDF) 10 Page - Analog Devices |
|
ADXRS450 bảng dữ liệu(HTML) 10 Page - Analog Devices |
10 / 28 page ADXRS450 Preliminary Technical Data Rev. PrA | Page 10 of 28 APPLICATIONS INFORMATION CALIBRATED PERFORMANCE Each ADXRS450 gyroscope uses internal EEPROM memory to store its temperature calibration information. The calibration information is encoded into the device during factory test. The calibration data is used to perform offset, gain, and self-test corrections over temperature. By storing this information internally, it removes the burden from the customer of performing system level temperature calibration. MECHANICAL CONSIDERATIONS FOR MOUNTING Mount the ADXRS450 in a location close to a hard mounting point of the PCB to the case. Mounting the ADXRS450 at an unsupported PCB location (that is, at the end of a lever, or in the middle of a trampoline), as shown in Figure 20, can result in apparent measurement errors, as the gyroscope is subject to the resonant vibration of the PCB. Locating the gyroscope near a hard mounting point helps to ensure that any PCB resonances at the gyroscope are above the frequency at which harmful aliasing with the internal electronics can occur. To ensure that aliased signals do not couple into the baseband measurement range, design the module wherein the first system level resonance occurs at a frequency higher than 800 Hz. MOUNTING POINTS PCB GYROSCOPE Figure 20. Incorrectly Placed Gyroscope APPLICATIONS CIRCUITS Figure 21 and Figure 22 show the recommended application circuits for the ADXRS450 gyroscope. These application circuits provide a connection reference for the available package types. Note that DVDD, AVDD, and PDD are all individually connected to ground through 1 μF capacitors; do not connect these supplies together. Additionally, an external diode and inductor must be connected for proper operation of the internal shunt regulator. These components allow for the internal resonator drive voltage to reach its required level, as listed in the Specifications section. Table 6. Component Qty Description Inductor 1 470 μH Diode 1 >24 V breakdown voltage Capacitor 3 1 μF Capacitor 1 100 nF 116 DVDD RSVD RSVD CS MISO PDD VX PSS SCLK MOSI AVDD DVSS RSVD AVSS CP5 RSVD 100nF 1µF 1µF 3.3V TO 5V 1µF DIODE >24V BREAKDOWN 470µH GND GND GND Figure 21. Recommended Applications Circuit, SOIC_CAV Package AVSS AVDD MISO DVDD SCLK CP5 RSVD PDD PSS MOSI DVSS VX RSVD 1µF 1µF 1µF 100nF 3.3V TO 5V DIODE >24V BREAKDOWN GND GND 470µH GND 114 TOP VIEW CS Figure 22. Recommended Applications Circuit, Ceramic LCC_V Package ADXRS450 SIGNAL CHAIN TIMING The ADXRS450 primary signal chain is shown in Figure 23. It is the series of necessary functional circuit blocks through which the rate data is generated and processed. This sequence of electro- mechanical elements determines how quickly the device is capable of translating an external rate input stimulus into an SPI word to be sent to the master device. The group delay, which is a func- tion of the filter characteristic, is the time required for the output of the low-pass filter to be within 10% of the external rate input, and is seen to be ~4 ms. Additional delay can be observed due to the timing of SPI transactions and the population of the rate data into the internal device registers. Figure 23 anatomizes this delay, wherein the delay through each element of the signal chain is presented. |
Số phần tương tự - ADXRS450 |
|
Mô tả tương tự - ADXRS450 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |