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231AEE Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers |
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231AEE Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers |
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9 / 36 page  ProxSense ® Series Copyright © Azoteq 2016 IQS231A Datasheet v1.3 Page 9 of 36 All Rights Reserved Check for latest datasheet December 2016 5 Summary: Features Pin compatibility Designs using the IQS229 or IQS128 will benefit from a “drop-in” replacement on a production device for evaluation. Using the added I 2C capability on the IQS231A will require an added connection to the master device. DYCAL / Quick release A DYCAL-type implementation (referring to dynamic threshold calibration) is recommended as main stability feature for the latest SAR user interface. Passing the device SAR qualification with this type of interface has been proven successful. “Quick release” detection is the improved “DYCAL”-type implementation and focusses on a release characteristic within a time window. Movement features add a second level of protection against stuck conditions with the quick release detection. The quick release will be detected on the proximity channel (not the secondary movement channel) and the signal slope will be monitored to enable the quick release. A single action from a touch/proximity state will trigger the quick release event and the event will only remain as long the proximity state holds. Control in RF environments A number of features are offered to ensure operation in various designs where high power RF signals may influence the sensing signal: Increased low frequency sensing options to allow for high impedance filter circuits Increased debounce option to prevent RF noise triggers Advanced temperature compensation for fast temperature variations caused by high power RF circuits Advanced temperature compensation An improved temperature compensation feature is offered to prevent false triggers due to quickly varying temperature environments. This feature effectively tracks temperature changes when no proximity trigger is present. UI User interface selection The device offers 3 main UIs intended for SAR use. These are: Proximity UI, no continuous movement sensing Proximity UI, continuous movement sensing Proximity & touch UI, continuous movement sensing during proximity, no movement sensing during touch (No time-out during long duration stationary SAR tests) In all cases the use of the quick release feature is recommended to prevent typical non-human activations from remaining. In all cases “no movement” and “movement sensing” refers to the capacitive movement sensing during normal activation. “Hand held detection” and “quick release” features will enable movement sensing with a no-movement time-out, irrespective of which UI is selected. |
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