CLC2005ISO8X datasheet(12/19 Pages) EXAR

12 / 19 page

12 / 19

exar.com/CLC1005

Rev 2D

CLC1005, CLC1015, CLC2005

Application Information

General Description

The CLC1005, CLC1015, and CLC2005 are single supply,

general purpose, voltage-feedback amplifiers fabricated

on a complementary bipolar process using a patented

topography. They feature a rail-to-rail output stage and are

unity gain stable. Both gain bandwidth and slew rate are

insensitive to temperature.

The common mode input range extends to 300mV below

ground and to 1.2V below Vs. Exceeding these values will

not cause phase reversal. However, if the input voltage

exceeds the rails by more than 0.5V, the input ESD devices

will begin to conduct. The output will stay at the rail during

this overdrive condition.

The design is short circuit protected and offers “soft”

saturation protection that improves recovery time.

Figures 1, 2, and 3 illustrate typical circuit configurations for

non-inverting, inverting, and unity gain topologies for dual

supply applications. They show the recommended bypass

capacitor values and overall closed loop gain equations. Figure

4 shows the typical non-inverting gain circuit for single supply

applications.

0.1 F

6.8 F

Output

G = 1 + (Rf/Rg)

Input

+Vs

-Vs

0.1 F

6.8 F

Figure 1: Typical Non-Inverting Gain Circuit

0.1 F

6.8 F

Output

G = - (Rf/Rg)

For optimum input offset

voltage set R1 = Rf || Rg

Input

+Vs

-Vs

0.1 F

6.8 F

Figure 2: Typical Inverting Gain Circuit

0.1 F

6.8 F

Output

G = 1

Input

+Vs

-Vs

0.1 F

6.8 F

Figure 3: Unity Gain Circuit

0.1F

6.8F

Out

+Vs

Figure 4: Single Supply Non-Inverting Gain Circuit

At non-inverting gains other than G = +1, keep Rg below 1kΩ

to minimize peaking; thus for optimum response at a gain of

+2, a feedback resistor of 1kΩ is recommended. Figure 5

illustrates the CLC1005, CLC1015 and CLC2005 frequency

response with both 1kΩ and 2kΩ feedback resistors.

Frequency (MHz)

100

Rf = 2kΩ

Rf = 1kΩ

G = 2

RL = 2kΩ

Vs = +5V

Figure 5: Frequency Response vs. Rf

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