CLC5632IM datasheet(15/19 Pages) NSC

15 / 19 page

Application Division (Continued)

•

Remove the ground plane under and around the part,

especially near the input and output pins to reduce para-

sitic capacitance.

•

Minimize all trace lengths to reduce series inductances.

•

Use flush-mount printed circuit board pins for prototyping,

never use high profile DIP sockets.

Evaluation Board Information

A data sheet is available for the CLC730038/CLC730036

evaluation boards. The evaluation board data sheets pro-

vide:

•

Evaluation board schematics

•

Evaluation board layouts

•

General information about the boards

The evaluation boards are designed to accommodate dual

supplies. The boards can be modified to provide single

supply operation. For best performance; 1) do not connect

the unused supply, 2) ground the unused supply pin.

Special

Evaluation

Board

Considerations

for

the

CLC5632

To optimize off-isolation of the CLC5632, cut the R

f trace on

both the CLC730038 and the CLC730036 evaluation

boards. This cut minimizes capacitive feedthrough between

the input and the output.

Figure 13 shows where to cut both

evaluation boards for improved off-isolation.

SPICE Models

SPICE models provide a means to evaluate amplifier de-

signs. Free SPICE models are available for National’s mono-

lithic amplifiers that:

•

Support Berkeley SPICE 2G and its many derivatives

•

Reproduce typical DC, AC, Transient, and Noise perfor-

mance

•

Support room temperature simulations

The readme file that accompanies the diskette lists released

models, and provides a list of modeled parameters. The

application note OA-18, Simulation SPICE Models for Na-

tional’s Op Amps, contains schematics and a reproduction of

the readme file.

Application Circuits

Single Supply Cable Driver

Figure 14 below shows the CLC5632 driving 10m of 75

Ω

coaxial cable. The CLC5632 is set for a gain of +2V/V to

compensate for the divide-by-two voltage drop at V

O. The

response after 10m of cable is illustrated in

Figure 15

DS015003-61

DS015003-52

FIGURE 13. Evaluation Board Changes

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