Datasheet

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Load Current - mA
Efficiency - %
10 20 30 40 50 60 70 80 90 100 110 120 130 150 160 170 180140 190 200
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4 Circuit Performance
Figure 3 shows a low-frequency sweep for measuring the radiated emissions to demonstrate compliance
with the EN55022 standard, which specifies the limits and methods of measurement of radio disturbance
characteristics of information technology equipment.
Figure 3. Radiated Emissions (dBµV/m) from 10 kHz to 30 MHz
Figure 4 shows the circuit efficiency over load current. Although load currents in the lower 20 mA can be
expected for low data rates and no common-mode voltage, higher load currents around 100 mA are
required for high data rates and high common-mode voltages.
Figure 4. Efficiency Over Load Current
3
SLUU470B– December 2010– Revised June 2011 Isolated, Full-Duplex, 1-Mbps, 3.3-V to 3.3-V RS-485 Interface
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