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MAX14850AEE+T Datasheet(PDF) 14 Page - Maxim Integrated Products |
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MAX14850AEE+T Datasheet(HTML) 14 Page - Maxim Integrated Products |
14 / 17 page Applications Information Affect of Continuous Isolation on Lifetime High-voltage conditions cause insulation to degrade over time. Higher voltages result in faster degradation. Even the high-quality insulating material used in the MAX14850 can degrade over long periods of time with a constant high-voltage across the isolation barrier. Figure 4 shows the life expectancy of the MAX14850 vs. working isolation voltage. Power Supply Sequencing The MAX14850 does not require special power-supply sequencing. The logic levels are set independently on either side by VCCA and VCCB. Each supply can be pres- ent over the entire specified range regardless of the level or presence of the other. Power Supply Decoupling To reduce ripple and the chance of introducing data errors, bypass VCCA and VCCB with 0.1µF ceramic capacitors to GNDA and GNDB, respectively. Place the bypass capaci- tors as close to the power-supply input pins as possible. Figure 3. Undervoltage Lockout Behavior Figure 4. Life Expectancy vs. Working Isolation Voltage VCCA VCCB VOUTA_ VOUTB_ VI/OA_ VI/OB_ 400µs/div LIFE EXPECTANCY vs. WORKING ISOLATION VOLTAGE WORKING ISOLATION VOLTAGE (VIOWM) - VRMS 700 600 500 400 300 200 100 0.1 1 10 100 50 1000 0.001 0 800 VIOWM = 200VRMS MAX14850 Six-Channel Digital Isolator www.maximintegrated.com Maxim Integrated │ 14 |
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