_______________Detailed Description

Supply Voltage

The MAX4213 EV kit can be used in either single or

dual-supply mode. Negative power-supply filter capaci-

tors C1 and C3 can be eliminated in your final single-

supply design.

Enable Control

The MAX4213 provides an enable pin (EN) to enable or

disable the output. Table 1 lists the options available for

the enable/disable control jumper JU1. You can use an

external controller by removing the shunt on JU1 com-

pletely and connecting the external controller to the

pad labeled EN. EN is a TTL/CMOS logic-level input.

Enable Logic-Low Input Current

Under certain conditions, the logic-low input current

can increase. The MAX4213 EV kit provides a resistor

location (R3) to limit the logic-low input current. A 10k

Ω

resistor value is recommended. R3 is normally shorted

by a PC board trace between its pads. Be sure to cut

this shorting trace before installing a resistor. Refer to

the

Enable Input and Disabled Output section of the

MAX4212/MAX4213/MAX4216/MAX4218/MAX4220

data sheet for further details.

Layout Considerations

The MAX4213 EV kit layout has been optimized for

high-speed signals and low distortion, with careful

attention given to grounding, power-supply bypassing,

and signal-path layout. The small, surface-mount,

ceramic bypass capacitors C1 and C2 have been

placed as close to the MAX4213 supply pins as possi-

ble. The ground plane has been removed around and

under the MAX4213 to reduce stray capacitance.

Capacitance at the inverting input pin has been mini-

mized by reducing the length and width of the input

and feedback traces, and by using 0805-size surface-

mount feedback and gain-set resistors.

MAX4213 Evaluation Kit

2

_______________________________________________________________________________________

Table 1. Jumper JU1 Functions

SHUNT LOCATION

ENABLE PIN

MAX4213

OUTPUT

1 and 2

Enabled

2 and 3

Connected to GND

Disabled

Figure 1. MAX4213 EV Kit Schematic

6

5

4

N.C.

IN-

OPEN

24

Ω

R1

49.9

Ω

R3

SHORTED

JU1

EN

VCC

OUT

3

C4

10

µF

10V

C2

0.1

µF

2

1

IN

C3

10

µF

10V

C1

0.1

µF

R2

49.9

Ω

VEE

EN

OUT

N.C.

8

7

2

3

1

IN+

MAX4213

U1