AN3728 FREESCALE | Alldatasheet
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© Freescale Semiconductor, Inc., 2008. All rights reserved. sense pressure with, either directly or through an air column. chemical media, it will not serve as a qualification guarantee. pressure sensor with clean, dry air. transferred through the gel to the sensing element on the die. Fluorosilicone or Media Resistant gel. Figure 1. Cross Section of Unibody Pressure Sensor compromised by the chemical interaction in the long term. lifetimes in typical applications.
2 Freescale Semiconductor
temperature after the moisture may have evaporated is ideal. the faster decay of wire-bonds that have been compromised. Figure 2. Some vaporization of the Media Resistant gel will provide adequate protection here. customers to survive product life cycles in their application. Figure 2. Media Separated by a Column of Clean Dry Air prolong the life cycle and last much longer.
Media Evaluations and Risks Media Florosilicone Gel Media Resistant Gel Long-Term Direct Exposure Air Column Disposable - 24hr Application (SSOP ONLY) Water Not Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Ethanol (Ethyl Alcohol) Not Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Diesel Tested-Worse Result Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Brake Fluid Not Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Windshield Washer Fluid Not Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Transmission Fluid Not Tested Tested Likely to have issues Okay Probably Okay (Customer to Validate) Power Steering Fluid Not Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Engine Coolant Not Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Differential Fluid Not Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Fuel C Tested--Poor Result Tested Likely to have issues Likely to have issues Likely to have issues Fuel C + M Tested--Poor Result Tested Likely to have issues Likely to have issues Likely to have issues Engine Oil Tested Tested Likely to have issues Unlikely to have issues Probably Okay (Customer to Validate) Detergent and Bleach Tested Tested Need More Data Unlikely to have issues Probably Okay (Customer to Validate) Human Breath Okay Okay Okay — Probably Okay (Customer to Validate) Gases- Nitrogen Okay Okay Need More Data Okay Okay Gases-High Oxygen Need More Data Need More Data Likely to have issues Need More Data Need More Data
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