EL5164, EL5165, EL5364

FN7389 Rev 9.00

Page 11 of 17

January 30, 2014

Output Drive Capability

In spite of their low 3.5mA of supply current, the EL5164, EL5165,

and EL5364 are capable of providing a minimum of ±100mA of

output current. With a minimum of ±100mA of output drive, the

EL5164, EL5165, and EL5364 are capable of driving 50

 loads to

both rails, making it an excellent choice for driving isolation

transformers in telecommunications applications.

Driving Cables and Capacitive Loads

When used as a cable driver, double termination is always

recommended for reflection-free performance. For those

applications, the back-termination series resistor will decouple

the EL5164, EL5165, and EL5364 from the cable and allow

extensive capacitive drive. However, other applications may have

high capacitive loads without a back-termination resistor. In

these applications, a small resistor (usually between 5

 and

50

) can be placed in series with the output to eliminate most

for any gain loss which may be created by this additional resistor

at the output. In many cases it is also possible to simply increase

Current Limiting

The EL5164, EL5165, and EL5364 have no internal output

current-limiting circuitry. If the output is shorted, it is possible to

exceed the Absolute Maximum Rating for output current or

power dissipation, potentially resulting in the destruction of the

device.

Power Dissipation

With the high output drive capability of the EL5164, EL5165, and

EL5364, it is possible to exceed the +125°C Absolute Maximum

junction temperature under certain very high load current

is important to calculate the maximum junction temperature

load conditions, or package type need to be modified to remain

in the safe operating area. These parameters are calculated in

Equation 1:

where:

•

• n = Number of amplifiers in the package

package

where:

Typical Application Circuits







+

=

(EQ. 1)

2





----------------------------



–

+





=

(EQ. 2)

FIGURE 25. FAST-SETTLING PRECISION AMPLIFIER

IN+

IN-

OUT

IN+

IN-

OUT

0.1µF

+5V

0.1µF

-5V

375



5



5



375



375



0.1µF

0.1µF

+5V

-5V

FIGURE 24. INVERTING 200mA OUTPUT CURRENT DISTRIBUTION

AMPLIFIER

IN+

IN-

OUT

IN+

IN-

OUT

0.1µF

+5V

0.1µF

-5V

0.1µF

0.1µF

375



375



375



375



+5V

-5V