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MAX14850

Six-Channel Digital Isolator

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

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

capacitors to GNDA and GNDB, respectively. Place the

bypass capacitors as close to the power-supply input

pins as possible.

Figure 4. Life Expectancy vs. Working Isolation Voltage

Figure 3. Undervoltage Lockout Behavior

LIFE EXPECTANCY

vs. WORKING ISOLATION VOLTAGE

700

600

500

400

300

200

100

0.1

1

10

100

50

1000

0.001

0

800

400µs/div