MAX2306/8/9EV Kit

General Description

The MAX2306/MAX2308/MAX2309 evaluation kits (EV
kits) simplify testing of the MAX2306/MAX2308/
MAX2309 IF receivers. These kits allow evaluation of
the devices' variable-gain amplifier (VGA), I/Q demodu-
lator, dual-band voltage-controlled oscillators (VCOs),
synthesizer, 3-wire programming interface, and power-
management features.

The EV kits provide 50

SMA connectors for all signal

inputs and outputs. A varactor-based tank circuit is pro-
vided for the on-chip VCO and can be tuned by a
potentiometer or an external voltage or phase-locked
with the on-chip phase-locked loop (PLL).

Features

o Dual Oscillators (MAX2306)
o On-Board PLL Synthesizer
o 3-Wire Interface
o Single-Ended or Differential Baseband Outputs
o +2.7V to +5.5V Single-Supply Operation
o SMA Connectors on All Signal Ports
o PC Control Software (available at

www.maxim-ic.com)

Evaluate: MAX2306/MAX2308/MAX2309

MAX2306/MAX2308/MAX2309 Evaluation Kits

________________________________________________________________ Maxim Integrated Products

19-2109; Rev 0; 7/01

Component List

Ordering Information

PART

TEMP. RANGE

IC PACKAGE

MAX2306EVKIT

-40°C to +85°C

28 QSOP-EP*

MAX2308EVKIT

-40°C to +85°C

28 QSOP-EP*

MAX2309EVKIT

-40°C to +85°C

28 QSOP-EP*

*Exposed pad

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.

DESIGNATION

QTY

DESCRIPTION

C1, C33, C34

47pF

±10%, 25V min ceramic

capacitors (0402)

2pF

±0.1pF, 25V min ceramic

capacitor (0402) (MAX2306)

33pF

±10%, 25V min ceramic

capacitor (0402) (MAX2306)

33pF

±10%, 25V min ceramic

capacitor (0402)
(MAX2306/MAX2309)

2pF

±0.1pF, 25V min ceramic

capacitor (0402)
(MAX2306/MAX2308)

33pF

±10%, 25V min ceramic

capacitor (0402)

33pF

±10%, 25V min ceramic

capacitor (0402)
(MAX2306/MAX2308)

C8, C12, C23,

C24, C25, C31

330pF

±10%, 25V min ceramic

capacitors (0402)

DESIGNATION

QTY

DESCRIPTION

C9, C10, C11,

C13, C14, C15,
C21, C22, C28,
C30, C35, C37,
C38, C42, C46,

C57, C59

0.01µF

±10%, 25V min ceramic

capacitors (0402)

C16

3.0pF

±0.1pF, 25V min ceramic

capacitor (0402)
(MAX2306/MAX2308)

C18

0.01µF

±1%, 25V min ceramic

capacitor (0402)
(MAX2306/MAX2308)

C19, C20

10pF

±10%, 25V min ceramic

capacitors (0402)

C27, C56, C58

10µF

±10%, 16V min tantalum

capacitors
AVX TAJC106K016

C29

0.068µF

±10%, 25V min ceramic

capacitor (0402)

C36

Open

C43

1000pF

±10% capacitor (0402)

(MAX2309)

DESIGNATION

QTY

DESCRIPTION

10k

±5% resistor (0402)

(MAX2306/MAX2308)

100

±5% resistor (0402)

(MAX2306/MAX2309)

R8, R14, R16,

R18

100

±5% resistors (0402)

49.9

±1% resistor (0402)

681

±1% resistor (0402)

R10

4.7k

±5% resistor (0402)

R11, R19, R31,
R32, R33, R34,

R40, R81

±5% resistors (0402)

R12, R22

47k

±5% resistors (0402)

R13, R24

10k

Bourns variable resistors,

Digi-Key 3296W-104-ND

R15, R17

100

±5% resistors (0402)

(MAX2309)

R20, R21, R25,

R35

Open

R23

2.4k

±5% resistor (0402)

R26

47k

±5% resistor (0402)

R41

resistor (0402) (MAX2306)

R44

resistor (0402) (MAX2309)

J18

20-pin header

JU3, JU9,

JU10, JU11

Two-pin headers

Balun transformer,
Toko DB458-1011

MAX2306EGI, MAX2308EGI, or
MAX2309EGI IC

U2, U3

MAX4108ESA

None

MAX2306/MAX2308/MAX2309
circuit board

None

MAX2306/MAX2308/MAX2309
data sheet

INTF2300

Interface Board

3-wire programming and
interface board

None

20-pin ribbon cable

DESIGNATION

QTY

DESCRIPTION

C44, C47C53

0.1µF

±10%, 25V min ceramic

capacitors (0402)

C54, C55

0.1µF

±10%, 25V min ceramic

capacitors (0805)

C60

resistor (0402)

(MAX2309)

C61

2pF

±0.1pF, 25V min ceramic

capacitor (0402) (MAX2309)

Varactor diode (MAX2306)
Alpha SMV1763-079

Varactor diode
Alpha SMV1763-079

Varactor diode
(MAX2306/MAX2308)
Alpha SMV1763-079

Varactor diode
(MAX2306/MAX2309)
Alpha SMV1763-079

33nH inductor (MAX2306)
Coilcraft 0603CS-33NXGBC

33nH inductor
(MAX2306/MAX2308)
Coilcraft 0603CS-33NXGBC

120nH inductor
(MAX2306/MAX2308)
Coilcraft 0603CS-33NXGBC

220nH inductor
Coilcraft 0603CS-R22TKBC

33nH inductor (MAX2309)
Coilcraft 0603CS-33NXGBC

270nH inductor
Toko LL1608-PSR275

Open

R1, R38, R39

resistors (0402)

10k

±5% resistor (0402)

(MAX2306)

10k

±5% resistor (0402)

(MAX2306/MAX2309)

10k

±5% resistor (0402)

Evaluate: MAX2306/MAX2308/MAX2309

MAX2306/MAX2308/MAX2309 Evaluation Kits

_______________________________________________________________________________________

Component List (continued)

Quick Start

The MAX2306/MAX2308/MAX2309 EV kits are fully
assembled and factory tested. Follow the instructions in
the Connections and Setup section.

Recommended Test Equipment

The test equipment recommended to verify MAX2306/
MAX2308/MAX2309 operation is listed in Table 1. This list
is intended as a guide only; substitutions may be possible.

Connections and Setup

The following sections provide instructions for getting
the EV kit running in CDMA mode.

CDMA Mode

Perform the following steps to evaluate the MAX2306/
MAX2308/MAX2309 in CDMA mode:

1) Verify that shunts JU3, JU10, and JU11 are in place.

2) Connect the INTF2300 interface cable as shown in

Figure 11. (Pin 1 of the interface cable corresponds
to the red wire; pin 1 is designated in silkscreen on
each of the PC boards.)

3) Connect a +2.75V power supply to the VCC and

GND terminals. Set the other two supplies to +5V
and -5V and then connect to the appropriate +5V,
-5V, and GND terminals on the EV board.

4) Install and run Maxim's CDMA control software

(available at www.maxim-ic.com). Under the
Technical Support heading, click on SOFTWARE.
Select the correct software to download and install.

5) With the MAX2306, MAX2308, or MAX2309 screen

active, set the control pins. Set SHDN to "H". On the
MAX2306, set the MODE to "H". On the MAX2309,
set STBY, BUF_EN, and DIVSEL to "H". Turn on the
power supplies. Under Preset Modes select CDMA
mode. Under Program Dividers set M1 and M2 to
306. Set R1 and R2 to 16 and then click Send Data
for M1, M2, R1, and R2. Under Control Register,
click on Send Data.

6) Connect a signal generator to the REF port, config-

ured for a sine wave with a 19.2MHz frequency and a
-10dBm amplitude. (The REF port is 50

terminated.)

7) Connect a signal generator with 183.72MHz at

-66dBm and apply it to the CDMA differential port.

8) Set VGC to 2.5VDC by rotating potentiometer R13.

Optionally, an external VGC voltage may be used
by removing jumper JU3 and applying a DC volt-
age to JU3 at the pin labeled VGC.

9) Configure an oscilloscope to measure a high-

impedance, 1Vp-p, 100kHz waveform. Connect it to
the I or Q output.

Voltage gain can be calculated by:

Gain = approximately 60dB

Note: The balun loss is not taken into account. This loss
is typically less than 0.5dB. There may also be some
loss through the MAX4108 op amp.

V (RMS)

P (dBm) - 30

Gain

20log

2 2

OUTp-p

Evaluate: MAX2306/MAX2308/MAX2309

MAX2306/MAX2308/MAX2309 Evaluation Kits

_______________________________________________________________________________________

Component Suppliers

Windows95 and Windows are registered trademarks
of Microsoft Corp.

Table 1. Recommended Equipment

SUPPLIER

PHONE

FAX

Alpha Industries

617-935-5150

617-933-2359

AVX

803-946-0690

803-626-3123

Coilcraft

847-639-6400

847-639-1469

Murata

770-436-1300

770-436-3030

Toko

708-297-0070

708-699-1194

EQUIPMENT

DESCRIPTION

RF Signal
Generators (2)

HP 8648A or equivalent. Capable of
delivering -70dBm to -10dBm of
output power in the 10MHz to
500MHz frequency range. One
generator is required to test the
receive signal path and the other is
for the reference frequency.

Oscilloscope

For viewing the demodulator outputs.

Power Supply (3)

Capable of providing at least 100mA
at +2.7V to +5.5V.

Additional Voltage
Source

For external control of VGA (optional).

Personal Computer

486DX33 or better, with Windows95

or later version of Windows

operating system and a parallel port.

INTF2300 Interface
Board

Provided with EV kit.

Evaluate: MAX2306/MAX2308/MAX2309

Adjustments and Control

VGC Adjust

The MAX2306/MAX2308/MAX2309 EV kits are config-
ured with a 10k

trim pot for setting and adjusting the

VGA gain. An external supply can be used by removing
the 2-pin shunt (JU3) and by directly connecting the sup-
ply to JU3 at pin labeled VGC. The VGC voltage must be
clean to minimize undesired amplitude modulation.

Interface Control

The interface port is designed to use a 20-pin ribbon
cable. Ten pins are signal lines, and the other ten pins
are digital grounds. Pin 1 of the interface cable is red.
Pin 1 is also designated in silkscreen on each of the PC
boards.

Detailed Description

The following sections cover the EV kits' circuit blocks
in detail. (Refer to the MAX2306/MAX2308/MAX2309
data sheet for additional information.)

CDMA Inputs

The on-board balun converts the CDMA DIFF input to a
differential signal for the MAX2306/MAX2308/MAX2309.
The 50

source impedance is transformed to 500 by

the combination of L4, R9, C19, C20, and the 4:1
impedance ratio of the input balun.

FM Inputs

The EV kit is configured for single-ended (50

) opera-

tion at the FM connector. The matching network trans-
forms 50

to 850.

REF Inputs

The REF port is AC-coupled and terminated for use
with a 50

signal source.

I/Q Outputs

The I/Q outputs are self-biased baseband outputs. The
differential I/Q outputs are converted to single-ended
outputs with MAX4108 op amps.

PC Board Layout/

Construction

The MAX2306/MAX2308/MAX2309 EV kits can serve as
board layout guides. Keep PC board trace lengths as
short as possible to minimize parasitics. Keep decou-
pling capacitors close to the device, with a low-induc-
tance through connection to the ground plane.

INTF2300

Interface Board

The INTF2300 interface board is used to control the 3-
wire interface of a device under test from the parallel
port of a PC. This board level translates 5V logic from
the PC to VCC of the device under test. The INTF2300
also provides buffering and EMI filtering. The recom-
mended operating supply voltage range is +2.7V to
+3.6V. For operation of the MAX2306/MAX2309 above
+3.6V, jumper JU1 may be removed and an external
supply voltage of +3.6V may be applied between VCC
(pin 2) and GND (pin 1) (Figure 11).

MAX2306/MAX2308/MAX2309 Evaluation Kits

_______________________________________________________________________________________

Evaluate: MAX2306/MAX2308/MAX2309

MAX2306/MAX2308/MAX2309 Evaluation Kits

_______________________________________________________________________________________

Figure 1. MAX2306EV Kit Schematic

MAX2306

BYP

FM+

BYP

R10

4.7k

10k

33pF

47pF

C46

0.01

33nH

2pF

C29

0.068

C30

0.01

R23

2.4k

CP_OUT

GND

TANKL+

TANKL-

MODE

VGC

CDMA-

CDMA+

VCC

DATA

CLK

GND

REF

10k

33pF

2pF

TANKH+

TANKH-

VCCD

MODE/DIVSEL

SHDN

C10

0.01

REF

J15

IOUT+

J12

IOUT-

49.9

0.01

RXI-

C11

0.01

C13

0.01

C14

0.01

C15

0.01

R13

10k

JU3

R12

47k

TOKO

4458D8-1011

C18

0.01

120nH

C19

10pF

C20

10pF

C16

3.0pF

681

220nH

CDMA DIFF

C21

0.01

LOCK

J14

QOUT-

CLK

LOCK

RXQ-

DATA

VCCA

J13

QOUT+

C22

0.01

C35

0.01

IOUT+

IOUT-

QOUT-

QOUT+

BYP

FM-

SHDN

R35

OPEN

JU9

VCC

R24

10k

C36

OPEN

R25

OPEN

RXI+

RXQ+

C31

330pF

R41

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