Ω,, R

Ω; unless specified)

CLC416 OPERATION

Description

The CLC416 is a dual current feedback amplifier with

the following features:

s

Differential gain and phase errors of 0.01%

and 0.03° into a 150

Ω load

s

Low, 3.9mA, supply current per amplifier

The professional video quality differential gain and

phase errors and low power capabilities of the CLC416

make this product a good choice for video applications.

Gain

The non-inverting and inverting gain equations for the

CLC416 are as follows:

Non-inverting Gain:

Inverting Gain:

setting resistor. Figure 1 shows the general non-invert-

ing gain configuration including the recommended

bypass capacitors.

Figure 1: Recommended Non-Inverting Gain Circuit

Feedback Resistor Selection

and frequency response of a current feedback

amplifier. Optimum performance of the CLC416, at a

frequency response plots in the typical performance

frequency response.

s

extend bandwidth

s

reduce bandwidth

the bandwidth will be cut in half.

Channel Matching

Channel matching and crosstalk efficiency are largely

dependent on board layout.

The layout of National’s

dual amplifier evaluation boards are designed to produce

optimum channel matching and isolation.

Typical

channel matching for the CLC416 is shown in Figure 2.

Figure 2: Channel Matching

The CLC416’s channel-to-channel isolation is better

than 70dB for input frequencies of 4MHz. Input

referred crosstalk vs. frequency is illustrated in Figure 3.

Typical DC Errors vs. Temperature

Temperature (

°C)

6

5

4

1

-50

0

100

3

2

1

0

-1

-2

-3

50

Equivalent Input Noise

Frequency (Hz)

100

10

1

1k

100

10k

100k

1M

10M

100

10

1

Inverting Current = 12pA/

√Hz

Voltage = 5nV/

√Hz

Non-Inverting Current = 3pA/

√Hz

Power Derating Curves

Ambient Temperature (

°C)

0.8

1.0

0.6

0

0

20

40

60

80

100

120 140

160 180

0.4

0.2

AJE

AJP

1

R

R

f

g

+

−

R

R

f

g

+

-

CLC416

0.1

µF

6.8

µF

0.1

µF

6.8

µF

g

Frequency (MHz)

1

10

100

-450

-360

-270

-180

-90

0

Channel B

Channel B

Channel A

Channel A

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