MAX4444 Evaluation Kit

2

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Detailed Description

Enable Control

The MAX4444 provides an enable pin (EN) to enable or

disable the output. Table 1 lists the options available for

the enable/disable control jumper (JU1). EN is a

TTL/CMOS-logic level input.

Layout Considerations

The MAX4444 EV kit layout has been optimized for

high-speed signals, with careful attention given to

grounding, power-supply bypassing, and signal-path

layout. The small, surface-mount, ceramic bypass

capacitors (C2, C4) have been placed as close to the

MAX4444 supply pins as possible. Signal traces have

been kept as short as possible by using 0805-sized ter-

mination and gain-set resistors.

Evaluating the MAX4445

To evaluate the MAX4445, turn off the power to the EV kit.

Replace the MAX4444 with a MAX4445ESE, and install

lowing formula:

the amplifier to be stable.

Table 1. Jumper JU1 Functions

SHUNT

MAX4444

ENABLE PIN

MAX4444

OUTPUT

Installed

Connected to VCC

MAX4444 enabled

Not installed

Pulled to GND through

1M

Ω resistor (R4)

MAX4444 in shut-

down

16

15

OUT

14

11

10

9

1

2

3

4

R4

1M

R3

49.9

Ω

1%

JU1

C2

0.1

µF

R1

49.9

Ω

1%

C1

4.7

µF

10V

5

6

7

8

U1

MAX4444

C4

0.1

µF

C3

4.7

µF

10V

R2

49.9

Ω

1%

GND

OUT

EN

REF

VCC

VEE

GND

IN-

N.C.

13

12

IN

+

N.C.

VEE

VCC

IN-

IN

+

OPEN

Figure 1. MAX4444 EV Kit Schematic