6

Typical Performance Curves

Application Information

Product Description

The EL2210, EL2310, and EL2410 are dual, triple, and quad

operational amplifiers stable at a gain of 1. The EL2211,

EL2311, and EL2411 are dual, triple, and quad operational

amplifiers stable at a gain of 2. All six are built on Elantec's

proprietary complimentary process and share the same

voltage mode feedback topology. This topology allows them

to be used in a variety of applications where current mode

feedback amplifiers are not appropriate because of

restrictions placed on the feedback elements. These

products are especially designed for applications where high

bandwidth and good video performance characteristics are

desired but the higher cost of more flexible and sophisticated

products are prohibitive.

Power Supplies

These amplifiers are designed to work at a supply voltage

difference of 10V to 12V. These amplifiers will work on any

combination of ± supplies. All electrical characteristics are

measured with ±5V supplies. Below 9V total supply voltage

the amplifiers’ performance will degrade dramatically. The

quiescent current is a direct function of total supply voltage.

With a total supply voltage of 12V the quiescent supply

current will increase from a typical 6.8mA per amplifier to

10mA per amplifier.

Output Swing vs Load

Please refer to the simplified block diagram. These amplifiers

provide an NPN pull-up transistor output and a passive

1250

Ω pull-down resistor to the most negative supply. In an

applications where the DC load is connected to ground the

negative swing is limited by the voltage divider formed by the

load, the internal 1250

Ω resistor and any external pull-down

resistor limit the maximum negative swing to

The negative swing can be increased by adding an external

resistor of appropriate value from the output to the negative

supply. The simplified block diagram shows an 820

Ω

external pull-down resistor. This resistor is in parallel with the

internal 1250

Ω resistor. This will increase the negative swing

to

Or -1.16V

Power Dissipation and Loading

Without any load and a 10V supply difference the power

dissipation is 70mW per amplifier. At 12V supply difference

this increases to 105mW per amplifier. At 12V this translates

to a junction temperature rise above ambient of 33°C for the

dual and 40°C for the quad amplifier. When the amplifiers

provide load current the power dissipation can rapidly rise.

In ±5V operation each output can drive a grounded 150

Ω

load to more than 2V. This operating condition will not

exceed the maximum junction temperature limit as long as

the ambient temperature is below 85°C, the device is

more.

If the load is connected to the most negative voltage (ground

in single supply operation) you can easily exceed the

absolute maximum die temperature. For example the

maximum die temperature should be 150°C. At a maximum

Package Power Dissipation vs Ambient Temp.

JEDEC JESD51-3 Low Effective Thermal Conductivity

Test Board

1.2

1

0.8

0.6

0.4

0.2

0

0

255075

100

125

150

85

Package Power Dissipation vs Ambient Temp.

JEDEC JESD51-3 Low Effective Thermal Conductivity

Test Board

1.8

1.6

1.4

1.2

0.8

0.4

0

0

255075

100

125

150

85

1

0.6

0.2

Ambient Temperature (°C)

Ambient Temperature (°C)

1.042W

781W

θ

SO8

SO14

θ

1.54W

1.25W

θ

PDIP8

PDIP14

θ

V

EE

150

1250

150

+

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

=

V

EE

150

1250

820

×

1250

820

+

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

÷

150

+

=

EL2210/11, EL2310/11, EL2410/11