MAX2338 EV KIT

General Description

The MAX2338 evaluation kit (EV kit) simplifies evalua-
tion of the MAX2338 dual-band, triple-mode LNA and
mixers. This kit allows evaluation of the device's low
noise amplifiers (LNA), downconverters and buffers.
Figure 1 shows the MAX2338 EV kit schematic. The EV
kit provides 50

SMA connectors for all RF and IF input

and output signals.

Features

o Easy Evaluation of the MAX2338
o +2.7V to +3.3V Single Supply Operation
o All Critical Matching Components Included
o Cellular-Band RF Ports Matched to 880MHz
o PCS-Band RF Ports Matched to 1960MHz
o SMA Connectors for all RF and IF Signal Ports
o Easy Configuration of Operating Modes

Evaluates: MAX2338

MAX2338 Evaluation Kit

________________________________________________________________ Maxim Integrated Products

19-1807; Rev 1; 4/03

PART

MAX2338EVKIT

-40°C to +85°C

TEMP RANGE

IC PACKAGE

28 QFN

Ordering Information

SUPPLIER

PHONE

FAX

AVX

803-946-0690

803-626-3123

EFJohnson

402-474-4800

402-474-4858

WEB

avx-corp.com

efjohnson.com

Component Suppliers

Kamaya

219-489-1533

219-489-2261

kamaya.com

D ESIG N A T IO N QTY

DESCRIPTION

C1, C4, C9

0.1µF

±10% ceramic capacitors

(0402)
Murata GRM39X7R103K016A

C2, C3,

C24, C27

100pF

±5% ceramic capacitors

(0402)
Murata GRM36COG101J050A

C5, C14, C16

6800p F

± 10% cer am i c cap aci tor s

(0402)
Murata GRM36X7R682025A

C6, C13, C15,

C17, C21

Not Installed

2.7pF

±0.1pF ceramic capacitor

(0402)
Murata GRM36COG2R7B050A

0.75pF

±0.1pF ceramic capacitor

(0402)
Murata GRM36COGR75B050A

C10

7pF

±0.1pF ceramic capacitor

(0402)
Murata GRM36COG070B050A

C11, C18,
C19, C20,

C26, C28, C33

1000p F

± 10% cer am i c cap aci tor s

(0402)
Murata GRM36X7R102050A

C12

resistor (0402)

Component List

Murata

949-852-2001

949-852-2002

murata.com

Toko

708-297-0070

708-699-1194

toko.com

D ESIG N A T IO N QTY

DESCRIPTION

C22

22pF

±5% ceramic capacitor

(0402)
Murata GRM36COG220J050A

C23, C25

4.0pF

±0.1pF ceramic capacitors

(0402)
Murata GRM36COG040B050A

C29

22µF, 10V m i n tantal um cap aci tor
AVX TAJC226K010

C30

15pF

±5% ceramic capacitor

(0603)
Murata GRM39COG150J050A

C31

4.7pF

±0.1pF ceramic capacitors

(0402)
Murata GRM36COG4R7B050

R1, R4, R5,

R6, R8

±5% resistors (0402)

R2, R3

24.3

±1% resistors (0402)

3.3k

±1% resistor (0402)

R9, R10

resistors (0402)

R11

8.25k

±5% resistor (0402)

R12, R13

Not installed

R14

±1% resistor (0402)

8.2nH inductor
Toko LL1608-FS8N2J

Note: Components in bold text are on the backside of the PC board.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

Note: When contacting these suppliers, please specify that
you are using the MAX2338.

Evaluates: MAX2338

MAX2338 Evaluation Kit

_______________________________________________________________________________________

Quick Start

The MAX2338 EV kit is fully assembled and factory test-
ed. Follow the instructions in the Connections and
Setup section for proper device evaluation.

Connections and Setup

This section provides a step-by-step guide to setting up
the MAX2338 EV kit and testing the LNA and downcon-
verters. Do not turn on the DC power or RF signal
generators until all connections are made.

D ESIG N A T IO N

QTY

DESCRIPTION

L2, L12

2.7nH inductors
Toko LL1608-FS2N7S

resistor (0603)

2.2nH inductor
Toko LL1608-FS2N2S

3.9nH inductor
Toko LL1608-FS2N9J

15nH inductor
Toko LL1608-FS15J

L7, L8, L11

120nH inductors
Toko LL1608-FS15J

L10

Not installed

Balun transformer
Toko B5F 458Db-1011

MAX2338EGI 44-pin QFN
N O T E: U 1 HA S A N EXPO SED
PA D D L E WH IC H IS SO L D ER ED
T O T H E CIRCUIT BOARD
GROUND PLANE.

D ESIG N A T IO N

QTY

DESCRIPTION

JU2

±1% resistor (0603)

JU 6, JU 8, JU 10

2 headers (0.1 inch centers)

JU1, JU3, JU4,

JU5, JU7

3 headers (0.1 inch centers)

JU1, JU3, JU4,
JU5, JU6, JU7,

JU8, JU10

Shunts

PMIXIN,

CMIXIN,

CLOOUT

SMA connectors ( PC mount )
Johnson 142-0701-201

CLNAOUT,

IFOUT,

PLNAOUT,

PLNAIN,

CLNAIN, LOIN,

PLOOUT,

FMOUT

SMA connectors ( edge mount )
Johnson 142-0701-801

VCC, GND

Test points

None

MAX2338 data sheet

None

MAX2338 EV kit data sheet

None

MAX2338 Rev A EV kit circuit
board

Component List (continued)

________________________________________________________ Recommended Test Equipment

Power Supply

Capable of providing at least 100mA at +2.7V to +3.3V.

RF Signal Generators (2)

HP 8648C or equivalent, capable of delivering -50dBm to -10dBm of output power from 800MHz to
2500MHz.

Network Analyzer

HP8753 or equivalent, covering the MAX2338 operating frequency range.

Spectrum Analyzer

HP8561E or equivalent, covering MAX2338 operating frequency range.

Cables (50

)

Three 50

cables with SMA connectors.

Ammeter (optional)

For measuring supply current.

Noise Figure Meter
(optional)

HP8970B or equivalent, for measuring the noise figure of the LNA and downconverters.

Evaluates: MAX2338

MAX2338 Evaluation Kit

_______________________________________________________________________________________

Low-Noise Amplifier, High-Gain

High-Linearity Mode

1) Set the GAIN jumper (JU4) on the EV kit to V

(HIGH). This enables the LNA to operate in high
gain mode.

2) Set the BAND jumper (JU1) on the EV kit to V

(HIGH) to test cellular band [JU1 to GND for PCS].

3) Set the LIN jumper (JU3) on the EV kit to V

(HIGH) to test the amplifiers in high linearity mode.

4) Connect a DC supply preset to +3V (through an

ammeter, if desired) to the EV kit's V

and GND

terminals. Do not turn on the supply.

5) Perform a full two-port calibration on a network ana-

lyzer at a power level of -30dBm over frequency
range of 800MHz to 900MHz for cellular band
[1900MHz to 2000MHz for PCS band].

6) Connect port 1 and port 2 of the network analyzer to

CLNAIN [PLNAIN for PCS] and CLNAOUT
[PLNAOUT for PCS] respectively to measure the
cellular [PCS] band gain.

7) Turn on the DC supply. If an ammeter is connected,

the supply current should read approximately 28mA
for cellular band [25mA for PCS].

8) The network analyzer display should indicate a typi-

cal gain of 15.7dB for cellular band and 15.3dB for
PCS band after accounting for board losses. The
input and output board losses are 0.12dB for the
cellular band. The input and output board losses for
PCS band are 0.17dB and 0.3dB, respectively.
These losses are to be added to the measurements
to obtain the performance of the LNAs.

Downconverter

1) Turn off the DC supply.

2) Remove the network analyzer from the LNA input

and output connections. The DC supply connec-
tions needed for testing the downconverter mixer
are the same as in the LNA section.

3) Set the LO/2 jumper (JU5) to V

(ON) to enable

the LO divider circuit for cellular band. When testing
PCS band, this jumper setting has no effect.

4) Set the BAND jumper (JU1) on the EV kit to V

(HIGH) to test cellular band [JU1 to GND for PCS].

5) Set the LIN jumper (JU3) on the EV kit to V

(HIGH) to test cellular and PCS downconverters in
high-linearity mode.

6) Connect an RF signal generator (with output dis-

abled) to the LOIN connector. Set the frequency to
2126MHz for cellular band [2143MHz for PCS] and
the output power to -3dBm.

7) Connect another RF signal generator (with output

disabled) to the CMIXIN SMA connector. Set the
frequency to 880MHz for cellular band [1960MHz
for PCS band] and the output power to -25dBm.

8) Connect the spectrum analyzer to the IFOUT SMA

connector. Set the spectrum analyzer center fre-
quency to 183MHz.

9) Turn on the DC supply. Enable the LO signal gener-

ator and RF input signal generator outputs.

10) Measure the peak of the 183MHz IF signal on the

spectrum analyzer. Compensate the IF signal con-
version gain for the balun and board losses. Balun
loss is 0.3dB and the input and output board losses
are 0.1dB each.

11) The conversion gain for cellular and PCS band are

typically +13.3dB and +14.5dB respectively, after
corrections from step 10 are applied.

Checking Noise Figure

Noise figure measurements are sensitive to board and
lab setup losses and parasitics. There are many tech-
niques and precautions for measuring a low-noise fig-
ure. Detailed explanation of these items goes beyond
the scope of this document. For more information on
how to perform this level of noise figure measurement,
refer to the noise figure meter operating manual, as well
as to Hewlett Packard application note #57-2, Noise
Figure Measurement Accuracy.

PC Board Layout Considerations

The MAX2338 EV kit can serve as a board layout guide.
Keep PC board trace lengths as short as possible to
minimize parasitics. Keep decoupling capacitors close
to the device, with a low inductance connection to the
ground plane.

Evaluates: MAX2338

MAX2338 Evaluation Kit

_______________________________________________________________________________________

Figure 1. MAX2338 EV Kit Schematic

MAX2338

CLNAOUT

RLNA

PLNAIN

GND

CLNAIN

LIN

GAIN

RBIAS

IF+

IF-

GND

BUFFEN

GND

PLNAOUT

GND

PMIXIN

CMIXIN

GND

LO/2

LOIN

GND

PLOOUT

CLOOUT

N/C

JU2

100pF

8.2nH

2.2nH

2.7pF

24.3k

SMA

CLNAOUT

SMA

PLNAIN

0.01

JU10

100pF

2.7nH

0.01

C14

6800pF

SMA

CLNAIN

C16

6800pF

C15

OPEN

3.9nH

C17

OPEN

C11

1000pF

JU1

C18

1000pF

C27

100pF

C26

1000pF

C28

1000pF

JU3

C19

1000pF

JU4

SMA

LOIN

C22

22pF

SMA

PLOOUT

R12

OPEN

SMA

CLOOUT

R13

OPEN

R10

SMA

FMOUT

JU8

L11

120nH

R11

8.25k

3.32k

C33

1000pF

C31

4.7pF

C30

15pF

GND

JU7

JU6

120nH

C24

100pF

C23

4.0pF

C25

4.0pF

120nH

SMA

IFOUT

24.3k

R14

15nF

SMA

CMIXIN

L10

OPEN

C10

7pF

C21

OPEN

0.01

SMA

PMIXIN

L12

2.7nH

OPEN

6800pF

SMA

PLNAOUT

0.75pF

C12

C20

1000pF

C13

OPEN

JU5

C29

BAND

BALUNTOKO85F

45808-1011

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