MAX3746EVKIT Datasheet MAX3746EVKIT | P1-P3

_________________________________________________________________Maxim Integrated Products 1

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The MAX3746 evaluation kit (EV kit) simplifies evaluation

of the MAX3746 limiting amplifier. The EV kit allows for

quick threshold level selections, provides a RSSI output

signal (when used with the MAX3744) and includes a

calibration circuit. The MAX3746 EV kit is fully assembled

and tested.

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♦ Fully Assembled and Tested

♦ Test Point for Easy Monitoring of LOS

♦ Polarity Reversal Control

♦ Jumpers Allow Quick Selection for Loss of

Signal Threshold Level

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DESIGNATION QTY DESCRIPTION

C1, C2, C7, C10

1000pF 10% 10V min

ceramic capacitor (0201)

C3, C4, C6, C8,

C9, C11, C14-C18

0. 1 µF, 10% 10V min

ceramic capacitor (0402)

C20

2.2µF, 10%, 10V min

ceramic capacitor (0805)

C21 1

33µF 10V min 5% tantalum

Capacitor (CASE B)

30.1k Ω, 1% resistor (0402)

2k Ω, 1% resistor (0402)

14k Ω, 1% resistor (0402)

24.9k Ω, 1% resistor (0402)

4.75k Ω, 1% resistor (0402)

R7 1

10k Ω, 1% resistor (0402)

R8 1

3.01k Ω, 1% resistor (0402)

L1 1

1.2µH, 5% Chip inductor

(

Coilcraft 1008LS)

JU2-JU5, JU9, 5

Jumper blocks, 2 Pins 0.1”

spacing

JU6, JU7 3 Jumper blocks, 3 Pins 0.1”

spacing

JU8 1 Jumper block, 3 Pins +1

Pin 0.1”

TP2, TP3, TP9,

TP10

4 Test point Digikey 5000K-

JU2-JU9 8 Shunts

J1-J8 8 SMA edge mount tab

Johnson 142-0701-851

U1 MAX3746EGE

1 MAX3746 Rev A Evaluation

Circuit Board

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PART TEMP. RANGE IC PACKAGE

MAX3746EVKIT -40°C to +85°C 16 QFN

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SUPPLIER PHONE FAX

AVX 843-444-2863 843-626-3123

Coilcraft 847-639-6400 847-639-1469

Murata 415-964-6321 415-964-8165

Note: Please indicate that you are using the MAX3746

when ordering from these suppliers.

19-0019; Rev 0 ; 8/04

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2 _________________________________________________________________________________________

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1) Connect OUT+ and OUT- to a 50Ω terminated

oscilloscope.

2) Connect IN+ and IN- to a 500mV

P-P

, 3.2Gbps

differential data stream.

3) Remove all shunts.

4) Shunt JU8 to V

so that there is no inversion of

signal polarity. (OUTPOL, V

). Figure 2 shows the

jumper diagram for the board.

5) Shunt JU4 connecting R3 = 13k Ω (R

6) Shunt JU6 connecting R7

= 10k Ω (R

LOS

7) Shunt JU5 connecting pin LOS to DISABLE.

8) Connect TP2 to V

9) Connect the power-supply ground to the GND pad

and then connect a +3.3V power supply to the V

10) Observe a limited signal at the output, roughly

0.8V

p-p

11) Lower the amplitude of the input signal from

500mV

p-p

to 15mV

p-p

or less. The output signal is

squelched.

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NAME FUNCTION

JU2, JU3, JU4 Selects loss of signal assert/deassert level.

JU5 Shunt to connect the LOS pin to the DISABLE pin (Squelch)

JU6

Shunt to connect series resistor from LOS

to test point TP2. Make sure TP2 is connected to a positive supply.

JU7 Disable. Shunting to V

holds the outputs static.

JU8

Shunt center pin (OUTPOL) to V

for full-swing non-inverted output

signal. Shunt to GND to have an inverted full-swing output. Leave

open for reduced-amplitude non-inverted output. Connect to 30kΩ

for reduced-amplitude inverted output signal.

JU9 Shunt to connect RSSI output to RSSI resistor R8.

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Figure 1. MAX3746 electrical schematic.

VCC

GND

IN-

OUT-

IN+

MAX3746

L1 1.2 H

C21

33 F

C20

2.2 F

C18

0.1 F

IN+

IN-

GNDTH DIS LOS

0.001 F

C10

0.001 F

C11

0.1 F

0.001 F

0.1 F

TP3

JU5

JU7

JU6

TP2

OUT+

OUT-

OUTPOL

JU8

GND

NC NC

RSSI

3.01k

JU9

0.1 F

C14 0.1 F

C15 0.1 F

C16 0.1 F

C17 0.1 F

C6 = 0.1uF

TP9

TP10

P1-P3 P4-P6 P7-P9

MAX3746EVKIT

Mfr. #:

Buy MAX3746EVKIT

Manufacturer:

Maxim Integrated

Description:

EVAL KIT MAX3746 LIMITING AMP

Lifecycle:

New from this manufacturer.

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MAX3746EVKIT