19-2109; Rev 0; 7/01
MAX2306/MAX2308/MAX2309 Evaluation Kits
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 50Ω 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).
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)
Features
Evaluate: MAX2306/MAX2308/MAX2309
Ordering Information
PART
MAX2306EVKIT
MAX2308EVKIT
MAX2309EVKIT
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
IC PACKAGE
28 QSOP-EP*
28 QSOP-EP*
28 QSOP-EP*
*Exposed
pad
Component List
DESIGNATION
C1, C33, C34
C2
C3
QTY
3
1
1
DESCRIPTION
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)
330pF
±10%,
25V min ceramic
capacitors (0402)
DESIGNATION
C9, C10, C11,
C13, C14, C15,
C21, C22, C28,
C30, C35, C37,
C38, C42, C46,
C57, C59
QTY
DESCRIPTION
15
0.01µF
±10%,
25V min ceramic
capacitors (0402)
C4
1
C16
1
3.0pF
±0.1pF,
25V min ceramic
capacitor (0402)
(MAX2306/MAX2308)
0.01µF
±1%,
25V min ceramic
capacitor (0402)
(MAX2306/MAX2308)
10pF
±10%,
25V min ceramic
capacitors (0402)
10µF
±10%,
16V min tantalum
capacitors
AVX TAJC106K016
0.068µF
±10%,
25V min ceramic
capacitor (0402)
Open
1000pF
±10%
capacitor (0402)
(MAX2309)
C5
1
C18
1
C6
1
C19, C20
2
C7
C8, C12, C23,
C24, C25, C31
1
C27, C56, C58
3
6
C29
C36
C43
1
0
1
________________________________________________________________
Maxim Integrated Products
1
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.
MAX2306/MAX2308/MAX2309 Evaluation Kits
Evaluate: MAX2306/MAX2308/MAX2309
Component List (continued)
DESIGNATION
C44, C47–C53
C54, C55
C60
C61
D2
D3
QTY
8
2
1
1
1
1
DESCRIPTION
0.1µF
±10%,
25V min ceramic
capacitors (0402)
0.1µF
±10%,
25V min ceramic
capacitors (0805)
0Ω resistor (0402)
(MAX2309)
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
0Ω resistors (0402)
10kΩ
±5%
resistor (0402)
(MAX2306)
10kΩ
±5%
resistor (0402)
(MAX2306/MAX2309)
10kΩ
±5%
resistor (0402)
None
INTF2300
Interface Board
None
1
1
1
DESIGNATION
R5
R6
R8, R14, R16,
R18
R7
R9
R10
R11, R19, R31,
R32, R33, R34,
R40, R81
R12, R22
R13, R24
R15, R17
R20, R21, R25,
R35
R23
R26
R41
R44
J18
JU3, JU9,
JU10, JU11
T1
U1
U2, U3
None
1
4
1
1
1
8
2
2
2
0
1
1
1
1
1
4
1
1
2
1
QTY
DESCRIPTION
10kΩ
±5%
resistor (0402)
(MAX2306/MAX2308)
100Ω
±5%
resistor (0402)
(MAX2306/MAX2309)
100Ω ±5% resistors (0402)
49.9Ω
±1%
resistor (0402)
681Ω
±1%
resistor (0402)
4.7kΩ
±5%
resistor (0402)
5kΩ
±5%
resistors (0402)
47kΩ
±5%
resistors (0402)
10kΩ Bourns variable resistors,
Digi-Key 3296W-104-ND
100Ω
±5%
resistors (0402)
(MAX2309)
Open
2.4kΩ
±5%
resistor (0402)
47kΩ
±5%
resistor (0402)
0Ω resistor (0402) (MAX2306)
0Ω resistor (0402) (MAX2309)
20-pin header
Two-pin headers
Balun transformer,
Toko DB458-1011
MAX2306EGI, MAX2308EGI, or
MAX2309EGI IC
MAX4108ESA
MAX2306/MAX2308/MAX2309
circuit board
MAX2306/MAX2308/MAX2309
data sheet
3-wire programming and
interface board
20-pin ribbon cable
D4
1
D5
1
L1
1
L2
1
L3
1
L4
L5
L6
Q1
R1, R38, R39
R2
R3
R4
1
1
1
1
3
1
1
1
2
_______________________________________________________________________________________
MAX2306/MAX2308/MAX2309 Evaluation Kits
Component Suppliers
SUPPLIER
Alpha Industries
AVX
Coilcraft
Murata
Toko
PHONE
617-935-5150
803-946-0690
847-639-6400
770-436-1300
708-297-0070
FAX
617-933-2359
803-626-3123
847-639-1469
770-436-3030
708-699-1194
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.
Table 1. Recommended Equipment
EQUIPMENT
DESCRIPTION
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.
For viewing the demodulator outputs.
Capable of providing at least 100mA
at +2.7V to +5.5V.
For external control of VGA (optional).
486DX33 or better, with Windows95
®
or later version of Windows
®
operating system and a parallel port.
Provided with EV kit.
RF Signal
Generators (2)
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 50Ω 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:
V
OUTp-p
Gain
=
20log
2 2V
IN
Evaluate: MAX2306/MAX2308/MAX2309
Oscilloscope
Power Supply (3)
Additional Voltage
Source
Personal Computer
INTF2300 Interface
Board
P
IN
(dBm) - 30
V
IN
(RMS)
=
500
×
10
10
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.
Windows95 and Windows are registered trademarks
of Microsoft Corp.
_______________________________________________________________________________________
3
MAX2306/MAX2308/MAX2309 Evaluation Kits
Evaluate: MAX2306/MAX2308/MAX2309
Adjustments and Control
VGC Adjust
The MAX2306/MAX2308/MAX2309 EV kits are config-
ured with a 10kΩ 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.
REF Inputs
The REF port is AC-coupled and terminated for use
with a 50Ω 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.
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.
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.
Detailed Description
The following sections cover the EV kits’ circuit blocks
in detail. (Refer to the MAX2306/MAX2308/MAX2309
data sheet for additional information.)
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).
CDMA Inputs
The on-board balun converts the CDMA DIFF input to a
differential signal for the MAX2306/MAX2308/MAX2309.
The 50Ω source impedance is transformed to 500Ω 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 (50Ω) opera-
tion at the FM connector. The matching network trans-
forms 50Ω to 850Ω.
4
_______________________________________________________________________________________
JU9
VCCA
C1
47pF
C14
C15
C13
0.01µF
0.01µF
0.01µF
24
23
22
BYP
25 BYP
BYP
FM+
C16
3.0pF
C19
10pF
CDMA+
28 TANKL+
R9
681Ω
CDMA-
1 TANKL-
C6
33pF
2 TANKH+
U1
VGC
18
C21
0.01µF
L2
33nH
R12
47kΩ
JU3
C20
10pF
19
TOKO
4458D8-1011
VCC
L4
220nH
C2
2pF
L1
33nH
20
T1
J5
CDMA DIFF
21
FM
J4
FM-
C30
0.01µF
26 CP_OUT
27 GND
C46
0.01µF
C18
0.01µF
L3
120nH
VCCA
VCC
R35
OPEN
R24
10kΩ
C36
OPEN
R23
2.4kΩ
C29
R1
0Ω 0.068µF
R2
10kΩ
C3
33pF
D2
R3
10kΩ D5
R4
10kΩ
D3
R5
10kΩ D4
3 TANKH-
4
MODE
V
CC
DATA
EN
REF
CLK
SHDN
QOUT+ 13
14
CLK
C35
0.01µF
16
15
R41
0Ω
VCCD
C10
0.01µF
7
R7
49.9Ω
SHDN
9 IOUT+
RXI+
C9
0.01µF
10
C11
0.01µF
IOUT-
LOCK
11
LOCK
QOUT-
12
C22
0.01µF
8
J15
IOUT+
5 V
CC
6 GND
17
VCCA
DATA
EN
C5
2pF
C7
33pF
C4
33pF
Figure 1. MAX2306EV Kit Schematic
R13
10kΩ
R25
OPEN
R10
4.7kΩ
C31
330pF
MAX2306
MODE/DIVSEL
J3
REF
J13
QOUT+
RXQ+
J12
IOUT-
RXI-
J14
QOUT-
RXQ-
MAX2306/MAX2308/MAX2309 Evaluation Kits
Evaluate: MAX2306/MAX2308/MAX2309
_______________________________________________________________________________________
5
