MAX4313 Evaluation Kit

2

_______________________________________________________________________________________

Detailed Description

Setting the Voltage Gain (MAX4310)

The gain of the MAX4310’s amplifier can be set by

tors. Refer to the MAX4310/MAX4313 data sheet for

recommended values.

Control of Digital Inputs (A0,

SHDN)

Jumpers JU1 and JU2 provide the user with manual

control of the multiplexer input address (A0) and shut-

down (SHDN), respectively (Table 1). An external con-

troller may also be used on either input by connecting

the controller to the appropriate pad and removing the

shunt from JU1 or JU2. The MAX4313’s A0 and SHDN

pins should not be left floating. For a single +5V sup-

ply, A0 and SHDN are CMOS-logic compatible. The

Layout Considerations

The PC board 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, C3) have been placed as close as pos-

sible to the amplifier’s supply pins. The ground plane

has been removed around and under the amplifier to

reduce stray capacitance. Capacitance at the feedback

pin has been minimized by using 0805-size feedback

and gain-set resistors and by removing the adjacent

ground plane.

Table 1. Jumper Selection

C2

10

µF

10V

C3

0.1

µF

C4

10

µF

10V

C1

0.1

µF

R1

49.9

Ω

R2

49.9

Ω

0

Ω

36

4

VEE

VCC

IN0

5 IN1

IN0

IN1

A0

A0

R3

1

GND

7

JU1

500

Ω

500

Ω

OPEN

IN1

1

2

3

IN0

8

2

3

2

1

JU2

OUT

SHDN

OUT

49.9

Ω

SHDN

ENABLE

DISABLE

MAX4313

U1

MUX

* REQUIRED FOR MAX4310

Figure 1. MAX4313 EV Kit Schematic

JUMPER

JUMPER

POSITION

FUNCTION

JU1

1–2

Select IN1.

Open

Drive pad A0 with

external signal.

1–2

Disable output.

2–3

Enable output.

Open

Drive pad SHDN with

external signal.

2–3

Select IN0.

JU2