ISL59111 datasheet(9/10 Pages) INTERSIL

9 / 10 page

FN6172.4

April 19, 2007

Where:

VS = Supply voltage

ISMAX = Maximum quiescent supply current

VOUT = Maximum output voltage of the application

RLOAD = Load resistance tied to ground

ILOAD = Load current

By setting the two PDMAX equations equal to each other, we

can solve the output current and RLOAD to avoid the device

overheat.

Power Supply Bypassing Printed Circuit Board

Layout

As with any modern operational amplifier, a good printed

circuit board layout is necessary for optimum performance.

Lead lengths should be as short as possible. The power

supply pin must be well bypassed to reduce the risk of

oscillation. For normal single supply operation, a single

4.7µF tantalum capacitor in parallel with a 0.1µF ceramic

capacitor from VS+ to GND will suffice.

Printed Circuit Board Layout

For good AC performance, parasitic capacitance should be

kept to minimum. Use of wire wound resistors should be

avoided because of their additional series inductance. Use

of sockets should also be avoided if possible. Sockets add

parasitic inductance and capacitance that can result in

compromised performance.

ISL59111

ISL59111 데이터시트(PDF) 9 Page - Intersil Corporation