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ADIS16485 Datasheet(PDF) 31 Page - Analog Devices |
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ADIS16485 Datasheet(HTML) 31 Page - Analog Devices |
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31 / 32 page  Data Sheet ADIS16485 EVALUATION TOOLS Breakout Board, ADIS16IMU/PCBZ The ADIS16IMU1/PCBZ (sold separately) provides a breakout board function for the ADIS16485, which means that it provides access to the ADIS16485 through larger connectors that support standard 1 mm ribbon cabling. It also provides four mounting holes for attachment of the ADIS16485 to the breakout board. For more information on the ADIS16IMU1/PCBZ, see http://www.analog.com/en/evaluation/eval-adis16imu1/eb.html. PC-Based Evaluation, EVAL-ADIS The EVAL-ADIS system support PC-based evaluation of the ADIS16485. For more information on the EVAL-ADIS system, see http://www.analog.com/EVAL-ADIS. POWER SUPPLY CONSIDERATIONS The ADIS16485 has approximately ~24 µF of capacitance across the VDD and GND pins. While this capacitor bank provides a large amount of localized filtering, it also presents an opportunity for excessive charging current when the VDD voltage ramps too quickly. Use the following relationship to help determine the appropriate VDD voltage profile, with respect to any current limit functions that can cause the power supply to lose regulation and potentially introduce unsafe conditions for the ADIS16485. ( ) dt dV C t i = In addition to managing the initial voltage ramp, take note of the transient current demand that the ADIS16485 requires during its start-up/self-initialization process. Once VDD reaches 2.85 V, the ADIS16485 begins its start-up process. Figure 29 offers a broad connection that communicates when to expect the spikes in current, and Figure 30 provides more detail on the current/time behavior during the peak transient condition, which typically occurs approximately 350 ms after VDD reaches 2.85 V. In Figure 30 notice that the peak current approaches 600 mA and the transient condition lasts for approximately 1.75 ms. CH1 2.00V CH4 100mA Ω 1M POINTS 1.00ms 1.00MS/s CH1 2.72V T 9.800% 1 4 T VDD CURRENT Figure 29. Transient Current Demand, Start-Up CH4 100mA Ω 1M POINTS 1.00ms 1.00MS/s CH1 2.72V T 9.800% 4 T CURRENT Figure 30. Transient Current Demand, Peak Demand Rev. E | Page 31 of 32 |
Similar Part No. - ADIS16485_15 |
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Similar Description - ADIS16485_15 |
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