Maxim MAX2654, MAX2656, MAX2655 User Manual

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

________________________________________________________________ Maxim Integrated Products 1

19-1872; Rev 0; 1/01

Component List MAX2654

Component List MAX2655

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 out­put 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 opti­mized for specific frequency operation.

Features

♦ Easy Evaluation of MAX2654/MAX2655/MAX2656

♦ +2.7V to +5.5V Single-Supply Operation

♦ RF Input and Output Matched to 50Ω

♦ Jumper Included for Gain/Shutdown Setting

♦ Fully Assembled and Tested

Ordering Information

DESIGNATION QTY DESCRIPTION

C3, C8 2

RFIN, RFOUT 2

VCC, GND 2 Test points, Digi-Key 5000K-ND

JU1 1

JU1 1 Shunt, Digi-Key S9000-ND

C1 1

C2 1

C4 1

C5 1

C6 1 Not installed

R4 1 0Ω resistor (0603)

R5 1 10kΩ ±1% resistor (0402)

L1 1

L2 1 0nH inductor (0402)

U1 1 MAX2654EXT 6-pin SC70

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

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

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

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

4.7µF tantalum capacitor ‘C’ case
AVX TAJC475K020

5.6nH inductor
Murata LQW1608A5N6C00T1

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

1

✕ 3 header (0.1in centers)

Digi-Key S1012-36-ND

PART TEMP. RANGE IC PACKAGE

MAX2654EVKIT -40°C to +85°C

MAX2655EVKIT -40°C to +85°C

MAX2656EVKIT -40°C to +85°C

DESIGNATION QTY DESCRIPTION

C3, C8 2

C1 1

C2 1

C4 1

C5 1

C6 1 Not installed

C7 1

R1 1 698Ω ±1% resistor (0603)

R2 1 511Ω ±1% resistor (0603)

R3 1 357Ω ±1% resistor (0603)

R4 1 0Ω resistor (0603)

R5 1 10kΩ ±1% resistor (0402)

L1 1

6 SC70-6

6 SC70-6

6 SC70-6

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

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

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

12pF ±5% ceramic capacitor (0603)
Murata GRM39CO G120J050A

4.7µF tantalum capacitor ‘C’ case
AVX TAJC475K025

27pF ±5% ceramic capacitor (0402)
Murata GRM36CO G270J050A

5.6nH inductor
Murata LQW1608A5N6C00T1

— 1 MAX2654 EV kit circuit board, rev A

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

2 _______________________________________________________________________________________

Component List MAX2655

(continued)

Component List MAX2656

Component List MAX2656

(continued)

DESIGNATION QTY DESCRIPTION

L2 1 0nH inductor (0402)

L3 1

U1 1 MAX2655EXT, 6-pin SC70

RFIN, RFOUT 2

VCC, GND 2 Test points, Digi-Key 5000K-ND

JU1 1

JU2, JU3, JU4 3

JU1, JU2,

JU3, JU4

— 1 MAX2655 EV kit circuit b oard, rev B

DESIGNATION QTY DESCRIPTION

C1 1

C2 1

C3, C7, C8 3

C4 1

C5 1

C6 1 Not installed

3.3nH inductor
Toko LL1005-FH3N3J

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

1

✕ 3 header (0.1in centers)

Digi-Key S1012-36-ND

1

✕ 2 header (0.1in centers)

Digi-Key S1012-36-ND

Shunts

4

Digi-Key S9000-ND

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

1.2pF ±0.1pF ceramic capacitor
(0402)

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

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

4.7µF tantalum capacitor ‘C’ case
AVX TAJC475K025

DESIGNATION QTY DESCRIPTION

R2 1 511Ω ±1% resistor (0603)

R3 1 392Ω ±1% resistor (0603)

R4 1 0Ω resistor (0603)

R5 1 12kΩ ±1% resistor (0402)

L1 1

L2 1 0nH inductor (0402)

U1 1 MAX2656EXT, 6-pin SC70

RFIN, RFOUT 2

VCC, GND 2 Test points, Digi-Key 5000K-ND

JU1 1

JU2, JU3, JU4 3

JU1, JU2,

JU3, JU4

— 1

4.7nH inductor
Murata LQW1608A4N7C00T1

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

1

✕ 3 header (0.1in centers)

Digi-Key S1012-36-ND

1

✕ 2 headers (0.1in centers)

Digi-Key S1012-36-ND

Shunts

4

Digi-Key S9000-ND

MAX2655/MAX2656 EV kit circuit
board, rev A

R1 1 715Ω ±1% resistor (0603)

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

_______________________________________________________________________________________ 3

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 50Ω 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

CC

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 con­nector 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
VCCposition. 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 addi­tion 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 docu­ment. Take into account PC board and external compo­nents loss when performing noise-figure measure­ments. 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 VCCnode on the
PC board should have a decoupling capacitor located
close to the device, and additional capacitors may be
needed for long V

CC

lines. This minimizes supply
coupling. Proper grounding of the GND pins is essen­tial. 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

Murata
Electronics

Taiyo
Yuden

800-831-9172 814-238-0490

800-348-2496 408-434-0375

www.

coilcraft.com

www.

murata.com

www.

t-yuden.com

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

4 _______________________________________________________________________________________

Figure 1. MAX2654 EV Kit Schematic

R3

357Ω

JU4

1

2

3

6

5

4

C7
27pF

BIAS

GND

RFIN

RFOUT

GND

VCC

C2

1.5pF

C4
12pF

C6
OPEN

R5

10kΩ

L3

3.3nH

C8

100pF

C5

4.7µF

L1

5.6nH

VCC

GND

RFOUT

SMA

RFIN

SMA

JU1

VCC

JU3

JU2

R2

511Ω

R1

698Ω

U1

MAX2655

C1

1800pF

R4

0Ω

L2

0nH

C3

100pF

Figure 2. MAX2655 EV Kit Schematic

VCC

JU1

C8

100pF

C3

0.017in WIDTH

0.035in LENGTH

✕

1

GND

U1

MAX2654

2

GND

RFOUT

GND

6

C6
OPEN

5

L2

0nH

10kΩ

R5

100pF

RFOUT

SMA

GND

SMA

RFIN

C1

6pF

C2

1.6pF

L1

5.6nH
3

RFIN

VCC

4

C4
22pF

0Ω

R4

VCC

C5

4.7µF

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

_______________________________________________________________________________________ 5

Figure 4. MAX2654 EV Kit Component Placement Guide—
Component Side

Figure 5. MAX2654 EV Kit PC Board Layout—Component Side

Figure 3. MAX2656 EV Kit Schematic

C1

1800pF

RFIN

SMA

R3

392Ω

R2

511Ω

R1

715Ω

JU4

JU3

JU2

C2

1.2pF

L1

4.7nH

C7
100pF

VCC

JU1

C8

100pF

1

BIAS

U1

MAX2656

2

GND

3

RFIN

RFOUT

GND

VCC

6

C6
OPEN

5

4

C4
680pF

0Ω

R5

L2

12kΩ

0nH

R4

100pF

C5

4.7µF

C3

RFOUT

SMA

GND

VCC

1.0"

1.0"

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

6 _______________________________________________________________________________________

Figure 6. MAX2654 EV Kit PC Board Layout—Ground Layer 2

Figure 7. MAX2654 EV Kit PC Board Layout—Ground Layer 3

Figure 8. MAX2654 EV Kit PC Board Layout—Solder Side

Figure 9. MAX2655 EV Kit Component Placement Guide—
Component Side

1.0"

1.0"

1.0"

1.0"

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

_______________________________________________________________________________________ 7

Figure 10. MAX2655 EV Kit PC Board Layout—Component Side

1.0"

Figure 11. MAX2655 EV Kit PC Board Layout—Ground Layer 2

1.0"

Figure 12. MAX2655 EV Kit PC Board Layout—Ground Layer 3

1.0"

Figure 13. MAX2655 EV Kit PC Board Layout—Solder Side

1.0"

Evaluate: MAX2654/MAX2655/MAX2656

MAX2654/MAX2655/MAX2656 Evaluation Kits

8 _______________________________________________________________________________________

Figure 14. MAX2656 EV Kit Component Placement Guide—
Component Side

1.0"

Figure 15. MAX2656 EV Kit PC Board Layout—Component Side

1.0"

Figure 16. MAX2656 EV Kit PC Board Layout—Ground Layer 2

1.0"

Figure 17. MAX2656 EV Kit PC Board Layout—Ground Layer 3

1.0"

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

9 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

Figure 18. MAX2656 EV Kit PC Board Layout—Solder Side

1.0"

MAX2654/MAX2655/MAX2656 Evaluation Kits

Evaluate: MAX2654/MAX2655/MAX2656

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