MAXIM MAX4108, MAX4109 Technical data

查询MAX4102EVKIT供应商

19-0489; Rev 0; 3/96

MAX4108 Evaluation Kit

_______________General Description

The MAX4108 evaluation kit (EV kit) simplifies evalua­tion of the MAX4108 high-speed amplifier. The EV kit
circuit demonstrates the MAX4108 in the noninverting,
unity-gain configuration.

The EV kit comes with the MAX4108 installed.To
evaluate the MAX4109, simply order a free sample
(MAX4109ESA), replace the MAX4108 with the MAX4109
on the EV board, and change the gain-setting resistors for
the desired gain. The minimum closed-loop gain for the
MAX4109 is +2V/V.

____________________Component List

DESIGNATION

U1 1

C3, C6 2

C1, C2,

C4, C5
R1, R2 2

R

F

IN, OUT 2 SMA connectors

None 1 MAX4108 PC board
None 1 MAX4108/MAX4109 data sheet

QTY DESCRIPTION

MAX4108ESA
10µF, 10V 20% tantalum capacitors

AVX TAJB106M010
Sprague 293D106X0010B

0.1µF, 10% ceramic capacitors

4

Vitramon VJ1206Y104KXX

49.9Ω, 1% resistors

1 24Ω, 5% resistor

____________________________Features

♦ 400MHz Unity-Gain Bandwidth
♦ Optional Adjustable Gain
♦ Fully Assembled and Tested

______________Ordering Information

PART TEMP. RANGE BOARD TYPE

MAX4108EVKIT-SO +25°C Surface Mount

Note: To evaluate the MAX4109, request a MAX4109ESA free
sample.

_________________________Quick Start

The MAX4108 EV kit is fully assembled and tested.
Follow these steps to verify board operation. Do not

turn on the power supply until all connections are
completed.

1) The circuit requires supply voltages of ±5V. Connect
±5V supplies to the corresponding pads marked
VCCand VEE. Connect the power-supply ground to
the pad marked GND.

2) Apply a signal between +2.5V and -3.1V to the SMA
connector marked IN.

3) Connect the output marked OUT to an oscilloscope
through a terminated 50Ω cable.

4) Turn on the power supply and verify the output sig­nal on the oscilloscope.

Evaluates: MAX4108/MAX4109

_______________Detailed Description

______________Component Suppliers

SUPPLIER PHONE FAX

AVX
Sprague
Vishay/Vitramon

[phone]
[phone]
[phone]

________________________________________________________________

[phone]
[phone]
[phone]

The MAX4108 gain can be adjusted with the following
minor modifications to the EV board.

1) Referring to Table 1, select the feedback (RF) and

gain-setting (RG) resistors for the desired gain.

2) Install RFand RG.

Voltage-Gain Adjustment

Maxim Integrated Products

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]

MAX4108 Evaluation Kit

Table 1. Gain-Set Resistors

GAIN

1 24
2 270
5 270

10 270

R

(Ω)

F

Open

270

R
(Ω)

68
30

G

SMALL-SIGNAL

BANDWIDTH

(MHz)

400 MAX4108
225 MAX4109

50 MAX4109
25 MAX4109

V

CC

GND

DEVICE

C6

10µF

10V

0.1µF

Layout Considerations

The MAX4108 EV kit layout has been optimized for
high-speed signals and low distortion, with careful
attention to grounding, power-supply bypassing, and
signal-path layout. The small, surface-mount, ceramic
bypass capacitors (C1, C2, C4, and C5) have been
placed as close to the four MAX4108 supply pins as
possible. Bypass capacitors for pins 5 and 8 must con­nect to a low-impedance ground. Individual power-sup­ply traces are used to separate the MAX4108 input and
output stage currents to reduce distortion. Unused pin
1 is grounded to prevent unwanted noise from coupling
into the circuit.

C4



C5

0.1µF


8

1

R

49.9Ω

0.1µF

3

2

C2



U1

MAX4108

4

7

6

1

5

C1

0.1µF


R

F 

24Ω

R2

49.9Ω

Evaluates: MAX4108/MAX4109

IN

R



G

OPEN

V

EE

C3

10µF

10V

Figure 1. MAX4108 EV Kit Schematic

2 _______________________________________________________________________________________

OUT