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exar.com/CLC1005

Rev 2D

CLC1005, CLC1015, CLC2005

Overdrive Recovery

For an amplifier, an overdrive condition occurs when the

output and/or input ranges are exceeded. The recovery time

varies based on whether the input or output is overdriven

and by how much the ranges are exceeded. The CLC1005,

CLC1015, and CLC2005 will typically recover in less than

20ns from an overdrive condition. Figure 6 shows the

CLC2005 in an overdriven condition.

Time (20ns/div)

Output

Input

G = 5

Figure 6: Overdrive Recovery

Enable/Disable Function

The CLC1015 offers an active-low disable pin that can be

used to lower its supply current. Leave the pin floating to

enable to part. Pull the disable pin to the negative supply

(which is ground in a single supply application) to disable

the output. During the disable condition, the nominal supply

current will drop below 127μA and the output will be at a

high impedance with about 2pF capacitance.

Power Dissipation

Power dissipation should not be a factor when operating

under the stated 2kΩ load condition. However, applications

with low impedance, DC coupled loads should be analyzed

to ensure that maximum allowed junction temperature is

not exceeded. Guidelines listed below can be used to verify

that the particular application will not cause the device to

operate beyond it’s intended operating range.

Maximum power levels are set by the absolute maximum

junction rating of 150°C. To calculate the junction

environment.

needs to be subtracted from the total power delivered by the

supplies.

Supply power is calculated by the standard power equation.

Power delivered to a purely resistive load is:

effect of the feedback network. For instance,

These measurements are basic and are relatively easy to

perform with standard lab equipment. For design purposes

however, prior knowledge of actual signal levels and load

impedance is needed to determine the dissipated power.

be calculated as above with the desired signal amplitudes

using:

The dynamic power is focused primarily within the output

stage driving the load. This value can be calculated as:

Assuming the load is referenced in the middle of the power

The CLC1015 is short circuit protected. However, this may

not guarantee that the maximum junction temperature

(+150°C) is not exceeded under all conditions. Figure 7

shows the maximum safe power dissipation in the package

vs. the ambient temperature for the packages available.