The LM324 Op amps which operate with only a single supply voltage, have true-differential

amplifiers operate over a wide range of power supply voltages with little change in

performance characteristics.

Precautions should be taken to insure that the power supply for the intergrated circuit never

becomes reversed in polarity or that the unit is not inadvertently installed backwards in a test

socket as an unlimited current surge through the resulting forward diode within the IC could

cause fusing of the internal conductors and result in a destroyed unit.

Large differential input voltages can be easily accommodated and as input differential

voltage protection diodes are not needed, no large input currents result from large differential

°C).

An input clamp diode with a resistor to the IC input terminal could be used.

The circuits presented in the section on typical applications emphasize operation on only a

single power supply voltage. If complementary power supplies are available, all of the

standard op-amp circuits can be used. In general, introducing a pseudo-ground( a bias

voltage reference of V+/2) will allow operation above and below this value in single power

supply systems. Many applications circuits are shown which take advantage of the wide

input common-mode voltage range, which includes ground. In most cases, input biasing is

not required and input voltages which range to ground can easily be accommodated.

APPLICATION HINTS

TYPICAL APPLICATIONS

LND324

• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •

Non Inverting DC Gain ( 0 V Output )

LND324

+

-

IN

+V

VOLTAGE FOLLOWER

+V

+V

IN

REF

+

-

COMPARATOR WITH HYSTERESIS

LND324

10K

10M

+5 V

LND324

+V

O

+

-

*

1M

10K

*R not needed due to temperature independent I

IN

V

(Volts)

GAIN =1+(R2/R1)

=101 (as shown)

O

o

R1

R2