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ADIS16488A Datasheet(PDF) 34 Page - Analog Devices |
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ADIS16488A Datasheet(HTML) 34 Page - Analog Devices |
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34 / 35 page  Product Overview Online Documentation Design Resources Discussion Sample & Buy ADIS16488A Data Sheet Rev. C | Page 34 of 35 0.4334 [11.0] 0.0240 [0.610] 0.019685 [0.5000] (TYP) 0.054 [1.37] 0.0394 [1.00] 0.0394 [1.00] 0.1800 [4.57] NONPLATED THRU HOLE 2× 0.022± DIA (TYP) 0.022 DIA THRU HOLE (TYP) NONPLATED THRU HOLE Figure 28. Suggested Layout and Mechanical Design When Using Samtec P/N CLM-112-02-G-D-A for the Mating Connector EVALUATIONTOOLS Breakout Board, ADIS16IMU1/PCBZ The ADIS16IMU1/PCBZ (sold separately)providesa breakout board function for the ADIS16488A, which meansthatit provides access to theADIS16488A through larger connectors that support standard 1 mm ribbon cabling. It also provides fourmounting holes for attachment ofthe ADIS16488Ato the breakout board. PC-Based Evaluation, EVAL-ADIS The EVAL-ADIS provides the systemsupportPC-based evaluation of the ADIS16488A. POWER SUPPLY CONSIDERATIONS The ADIS16488A hasapproximately 24 μFofcapacitance across the VDDandGNDpins.Whereas this capacitorbankprovidesa large amount of localized filtering,it alsopresentsan opportunity for excessivechargingcurrent when theVDDvoltage rampstoo quickly. Use thefollowingrelationship tohelpdetermine the appropriateVDDvoltageprofile, withrespect toany current-limit functions that can causethepowersupplyto loseregulation and potentiallyintroduce unsafeconditions fortheADIS16488A. ( ) dt dV C t i = In addition tomanaging theinitial voltageramp,takenoteofthe transientcurrent demandthattheADIS16488A requiresduringits start-up/selfinitializationprocess.When VDDreaches 2.85 V, the ADIS16488A begins itsstart-upprocess. Figure29 offers a broad perspectivethat showswhento expect thespikesin current, whereasFigure30 providesmoredetail on thecurrent/time behaviorduringthepeaktransient condition, which typically occurs approximately350 msafter VDDreaches2.85 V. 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 |
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