Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

________________________________________________________________ Maxim Integrated Products

19-1872; Rev 0; 1/01

Component List MAX2654

DESIGNATION

QTY

DESCRIPTION

6pF ±0.5pF ceramic capacitor
(0402), Murata GRM36COG060D050A

1.6pF ±0.1pF ceramic capacitor
(0402), Murata GRM36COG1R6B050A

C3, C8

100pF ±5% ceramic capacitors
(0603), Murata GRM36COG101J050

22pF ±5% ceramic capacitor
(0603), Murata GRM36COG220J050

4.7µF tantalum capacitor `C' case
AVX TAJC475K020

Not installed

resistor (0603)

10k

±1% resistor (0402)

5.6nH inductor
Murata LQW1608A5N6C00T1

0nH

inductor (0402)

MAX2654EXT 6-pin SC70

RFIN, RFOUT

SMA connectors (edge mount)
tab contact, EFJohnson 142-0701-851

VCC, GND

Test points, Digi-Key 5000K-ND

JU1

3 header (0.1in centers)

Digi-Key S1012-36-ND

JU1

Shunt, Digi-Key S9000-ND

MAX2654 EV kit circuit board, rev A

Component List MAX2655

DESIGNATION

QTY

DESCRIPTION

1800pF ±10% ceramic capacitor
(0402), Murata GRM36X7R182K050A

1.5pF ±0.1pF ceramic capacitor
(0603), Murata GRM39COG1R5B050A

C3, C8

100pF ±5% ceramic capacitors
(0402), Murata GRM36COG101J050A

12pF ±5% ceramic capacitor (0603)
Murata GRM39COG120J050A

4.7µF tantalum capacitor `C' case
AVX TAJC475K025

Not installed

27pF ±5% ceramic capacitor (0402)
Murata GRM36COG270J050A

698

±1% resistor (0603)

511

±1% resistor (0603)

357

±1% resistor (0603)

resistor (0603)

10k

±1% resistor (0402)

5.6nH inductor
Murata LQW1608A5N6C00T1

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.

General Description

The MAX2654/MAX2655/MAX2656 evaluation kits
(EV kits) simplify evaluation of the MAX2654/MAX2655/
MAX2656 low-noise amplifiers (LNAs). These kits
enable testing of the devices' performance and require
no additional support circuitry. The signal input and out-
put use SMA connectors to facilitate connection of RF
test equipment.

The MAX2654/MAX2655/MAX2656 EV kits are fully
assembled with the MAX2654/MAX2655/MAX2656 on
board, and incorporate input matching components opti-
mized for specific frequency operation.

Features

o Easy Evaluation of MAX2654/MAX2655/MAX2656
o +2.7V to +5.5V Single-Supply Operation
o RF Input and Output Matched to 50
o Jumper Included for Gain/Shutdown Setting
o Fully Assembled and Tested

Ordering Information

PART

TEMP. RANGE

IC PACKAGE

MAX2654EVKIT

-40°C to +85°C

6 SC70-6

MAX2655EVKIT

-40°C to +85°C

6 SC70-6

MAX2656EVKIT

-40°C to +85°C

6 SC70-6

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

_______________________________________________________________________________________

Component List MAX2655

(continued)

DESIGNATION

QTY

DESCRIPTION

0nH inductor (0402)

3.3nH inductor
Toko LL1005-FH3N3J

MAX2655EXT, 6-pin SC70

RFIN, RFOUT

SMA connectors (edge mount) tab
contact, EFJohnson 142-0701-851

VCC, GND

Test points, Digi-Key 5000K-ND

JU1

3 header (0.1in centers)

Digi-Key S1012-36-ND

JU2, JU3, JU4

2 header (0.1in centers)

Digi-Key S1012-36-ND

JU1, JU2,

JU3, JU4

Shunts
Digi-Key S9000-ND

MAX2655 EV kit circuit board, rev B

DESIGNATION

QTY

DESCRIPTION

511

±1% resistor (0603)

392

±1% resistor (0603)

resistor (0603)

12k

±1% resistor (0402)

4.7nH inductor
Murata LQW1608A4N7C00T1

0nH

inductor (0402)

MAX2656EXT, 6-pin SC70

RFIN, RFOUT

SMA connectors (edge mount)
tab contact, Johnson 142-0701-851

VCC, GND

Test points, Digi-Key 5000K-ND

JU1

3 header (0.1in centers)

Digi-Key S1012-36-ND

JU2, JU3, JU4

2 headers (0.1in centers)

Digi-Key S1012-36-ND

JU1, JU2,

JU3, JU4

Shunts
Digi-Key S9000-ND

MAX2655/MAX2656 EV kit circuit
board, rev A

Component List MAX2656

DESIGNATION

QTY

DESCRIPTION

1800pF ±10% ceramic capacitor
(0402), Murata GRM36X7R182K050

1.2pF ±0.1pF ceramic capacitor
(0402)

C3, C7, C8

100pF ±5% ceramic capacitors
(0402), Murata GRM36COG101J050

680pF ±10% ceramic capacitor
(0603), Murata GRM39X7R681K050

4.7µF tantalum capacitor `C' case
AVX TAJC475K025

Not installed

715

±1% resistor (0603)

Component List MAX2656

(continued)

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

_______________________________________________________________________________________

Quick Start

The MAX2654/MAX2655/MAX2656 EV kits are fully
assembled and factory tested. Follow the instructions in
the Connections and Setup section for proper device
evaluation.

Test Equipment Required

· An RF signal generator capable of delivering -30dBm

of output power and a frequency range covering
the MAX2654/MAX2655/MAX2656 (1400MHz to
2000MHz, for example)

· An RF spectrum analyzer that covers the operating

frequency range

· A DC power supply capable of supplying +2.7V to

+5.5V

· Two 50

coaxial cables with SMA connectors

· An ammeter to measure supply current (optional)

· A noise figure meter (optional)

· A network analyzer for measuring gain and return

loss (optional)

Connections and Setup

Checking Power Gain

1) Connect a DC supply (preset to +3.0V) to the V

and GND terminals (through an ammeter, if desired)
on the EV kit.

2) Set the RF generator for a desired frequency at a

power level of -30dBm. Connect the RF generator's
output to the RFIN SMA connector.

3) Connect the coaxial cable from the RFOUT SMA con-

nector to the spectrum analyzer.

4) Turn on the DC supply. The supply current should

read approximately 6mA for MAX2654, 8mA for
MAX2655, and 11mA for MAX2656.

5) Activate the RF generator's output. A signal on the

spectrum analyzer's display should indicate a typical
gain as shown on the device data sheet after
accounting for cable and board losses.

6) Optional: For the MAX2656, set the jumper JU2 to the

position. The power gain should now be about

1dB.

7) Optional: Another method of determining gain is by

using a network analyzer. This has the advantage of
displaying gain vs. a swept frequency band, in addi-
tion to displaying input and output return loss. Refer
to the user manual of the network analyzer for setup
details.

Checking Noise Figure

Noise figure measurements on low-noise devices are
extremely sensitive to board and lab setup losses and
parasitics. There are many techniques and precautions
for measuring low noise figure. A detailed explanation
of these items would exceed the scope of this docu-
ment. Take into account PC board and external compo-
nents loss when performing noise-figure measure-
ments. The typical input losses on these EV kits is
0.2dB at 1575MHz and 0.25dB at 1960MHz. For more
information on how to perform this level of noise-figure
measurement, refer to the noise-figure meter operating
manual and to Hewlett Packard's application note #57-2,
Noise Figure Measurement Accuracy.

Layout Considerations

Good PC board layout is an essential part of an RF
circuit's design. The EV kit PC board can serve as a
guide for laying out a board using the MAX2654/
MAX2655/MAX2656. Generally, the V

node on the

PC board should have a decoupling capacitor located
close to the device, and additional capacitors may be
needed for long V

lines. This minimizes supply

coupling. Proper grounding of the GND pins is essen-
tial. Connect the GND pins to the ground plane either
directly, through vias, or both. For MAX2654, connect
pin 1 to the PC board ground plane through a 0.017in
width by 0.035in length line.

Component Suppliers

SUPPLIER

PHONE

FAX

WEB

Coilcraft

847-639-6400

847-639-1469

www.

coilcraft.com

Murata
Electronics

800-831-9172

814-238-0490

www.

murata.com

Taiyo
Yuden

800-348-2496

408-434-0375

www.

t-yuden.com

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

_______________________________________________________________________________________

GND

RFIN

RFOUT

GND

VCC

C2
1.6pF

C4
22pF

C6
OPEN

10k

C5
4.7

µF

5.6nH

VCC

GND

RFOUT

SMA

6pF

RFIN

SMA

JU1

VCC

MAX2654

0.017in WIDTH

0.035in LENGTH

0nH

100pF

Figure 1. MAX2654 EV Kit Schematic

357

JU4

C7
27pF

BIAS

GND

RFIN

RFOUT

GND

VCC

C2
1.5pF

C4
12pF

C6
OPEN

10k

3.3nH

100pF

C5
4.7

µF

5.6nH

VCC

GND

RFOUT

SMA

RFIN

SMA

JU1

VCC

JU3

JU2

511

698

MAX2655

1800pF

0nH

100pF

Figure 2. MAX2655 EV Kit Schematic

Part Number MAX2655EVKIT