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19-1507; Rev 0a; 8/99
MAX2310/MAX2314 Evaluation Kits
General Description
The MAX2310/MAX2314 evaluation kits (EV kits) simpli-
fy testing of the MAX2310/MAX2314 IF receivers. These
kits allow evaluation of the devices’ variable-gain ampli-
fier (VGA), I/Q demodulator, dual-band voltage-con-
trolled oscillators (VCOs), synthesizer, 3-wire program-
ming interface and power-management features.
Figures 1 and 2 show MAX2310 and MAX2314 kit
schematics, respectively.
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). PC board
pads (J12, J13, J14, J15) are available for installing
low-inductance oscilloscope probe points, if desired.
o
3-Wire Interface
o
Differential Baseband Outputs
o
+2.7V to +5.5V Single-Supply Operation
o
SMA Connectors on All Signal Ports
o
Low-Power Shutdown Mode
o
PC Control Software (available at
www.maxim-ic.com)
Features
Evaluate: MAX2310/MAX2314
Ordering Information
PART
MAX2310EVKIT
MAX2314EVKIT
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
IC PACKAGE
28 QSOP
28 QSOP
Note:
To evaluate the MAX2312 or MAX2316, order the
MAX2312EVKIT or MAX2316EVKIT.
Component List
DESIGNATION
C1, C33, C34
C2
C3, C4
C5
C6, C7
C8, C12, C23,
C24, C25
C9, C10, C11,
C13, C14, C15,
C18, C21, C22,
C28, C35, C37,
C38, C42, C46
C16, C26, C31,
C32, C36, C39,
C40, C41, C45
C17
C19, C20
QTY
3
1
2
1
2
5
DESCRIPTION
47pF ±10%, 25V min ceramic
capacitors (0402)
5pF ±0.1pF, 25V min ceramic
capacitor (0402)
18pF ±10%, 25V min ceramic
capacitors (0402)
1.5pF ±0.1pF, 25V min ceramic
capacitor (0402) (MAX2310)
12pF ±10%, 25V min ceramic
capacitors (0402) (MAX2310)
330pF ±10%, 25V min ceramic
capacitors (0402)
DESIGNATION
C27
C29
C30
D1
D3
D4
INTF2300
Interface Board
L1
L2
9
Open
10pF ±10%, 25V min ceramic
capacitor (0402)
8pF ±10%, 25V min ceramic
capacitors (0402)
L3
L4
L5
QTY
1
1
1
1
1
1
1
1
1
1
1
1
DESCRIPTION
10µF ±10%, 16V min tantalum cap
AVX TAJC106K016
0.033µF ±10%, 25V min ceramic
capacitor (0402)
3300pF ±10%, 25V min ceramic
capacitor (0402)
Open
Varactor diode
Alpha SMV1255-003
Varactor diode (MAX2310)
Alpha SMV1255-003
3-wire programming and interface
board
68nH inductor
Coilcraft 0805CS-680 XJBC
18nH inductor (MAX2310)
Coilcraft 0805CS-220 XJBC
1µH inductor
Coilcraft 1008CS-102 XKBC
180nH inductor
Coilcraft 0805CS-181TKBC
270nH inductor
Coilcraft 0805CS-271 XKBC
15
0.01µF ±10%, 25V min ceramic
capacitors (0402)
1
2
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX2310/MAX2314 Evaluation Kits
Evaluate: MAX2310/MAX2314
Component List (continued)
DESIGNATION
Q1
R1, R10, R12,
R31–R34
R11
R4, R5
R2, R3, R23
C43
R6
R8, R14, R16,
R18
R7
R9
R13, R24
R15, R17, R19,
R20, R21, R25,
R27–R30, R35
R22, R26
T1
U1
None
None
None
QTY
1
6
1
2
3
1
1
4
1
1
2
Open
0Ω resistors (0402)
0Ω resistors (0402) (MAX2310)
10kΩ ±5% (0402) (MAX2310)
10kΩ ±5% resistors (0402)
1000pF ±10% (0402) (MAX2314)
100Ω ±5% resistor (0402)
(MAX2310)
100Ω ±5% resistors (0402)
49.9Ω ±1% resistor (0402)
680Ω ±1% resistor (0402)
10kΩ Bourns variable resistors
Digi-Key 3296W-104-ND
Open
47kΩ ±5% resistors (0402)
Balun transformer
Toko DB458-1011
Maxim MAX2310EEI or
MAX2314EEI IC
MAX2310/MAX2314 circuit board
MAX2310/MAX2312/MAX2314/
MAX2316 data sheet
20-pin ribbon cable
Oscilloscope
RF Signal
Generators (2)
DESCRIPTION
Table 1. Recommended Equipment
EQUIPMENT
DESCRIPTION
HP 8648A or equivalent. Capable of
delivering -70dBm to -10dBm of out-
put power in the 10MHz to 500MHz
frequency range. One generator is
required to test the receive signal
path and the other is for the refer-
ence frequency.
For viewing the demodulator out-
puts, 3-wire serial interface, and
other functions
Capable of providing at least 100mA
at +2.7V to +5.5V
For external control of VGA functions
(optional)
486DX33 or better, with Windows95
®
or Windows98
®
operating system and
a functional parallel port.
Provided with EV kit
Power Supply
Additional Voltage
Source
Personal Computer
INTF2300 Interface
Board
11
2
1
1
1
1
1
Windows95 and Windows98 are registered trademarks
of Microsoft Corp.
Recommended Test Equipment
The test equipment recommended to verify MAX2310/
MAX2314 operation is listed in Table 1. This list is
intended as a guide only; substitutions may be possi-
ble.
Connections and Setup
The following sections provide instructions for getting
the EV kit running in both the CDMA and FM modes.
Component Suppliers
SUPPLIER
Alpha Industries
AVX
Coilcraft
Digi-Key
Murata
Toko
PHONE
617-935-5150
803-946-0690
847-639-6400
218-681-6674
949-852-2001
708-297-0070
FAX
617-933-2359
803-626-3123
847-639-1469
218-681-3380
949-852-2002
708-699-1194
CDMA Mode
Perform the following steps to evaluate the MAX2310/
MAX2314 in CDMA mode:
1) Verify that shunts JU3, JU10, and JU11 are in place.
2) Connect the INTF2300 interface cable as shown in
Figure 8. (Pin 1 of the interface cable corresponds
to the red wire; pin 1 is designated in silk screen on
each of the PC boards.)
3) Connect a +2.75V power supply to the V
CC
and
GND terminals.
4) Install and run Maxim’s CDMA control software
(available at www.maxim-ic.com). Click on the
Maxim CDMA software on the Windows task bar.
On the IC selection form, click on the MAX2310/
MAX2314 control button.
Quick Start
The MAX2310/MAX2314 EV kits are fully assembled
and factory tested. Follow the instructions in the
Connections and Setup
section.
2
_______________________________________________________________________________________
MAX2310/MAX2314 Evaluation Kits
5) With the MAX2310/MAX2314 control screen active,
bring the
SHDN
pin high by clicking on the "H" con-
trol button located near the middle of the screen.
6) (MAX2310 only) With the MAX2310/MAX2314 con-
trol screen active, bring the MODE pin high by
clicking on the "H" control button located near the
middle of the screen. The mode pin is floated on
the MAX2314 board. In the control register set the
DIV_SEL bit and the VCO_SEL bit to “0.” Click on
the “send data” button.
7) Connect a function generator to the REF port, con-
figured for a sine wave with a 19.68MHz frequency
and a -10dBm amplitude. (The REF port is 50Ω ter-
minated.)
8) Connect a signal generator with 210.48MHz
(MAX2310) or 85.48MHz (MAX2314) at -66dBm and
apply it to the CDMA differential port.
9) 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 JU2.
10) Configure an oscilloscope to measure a high-
impedance (10kΩ), 1Vp-p, 100kHz differential
waveform. Connect it to the I or Q output.
Voltage gain can be calculated by:
V
OUTp
−
p
Gain
=
20log
2 2 V
IN
PIN(dBm)
V
IN
(RMS)
=
1/2
⋅
10
10
Adjustments and Control
VGC Adjust
The MAX2310/MAX2314 EV kits are configured 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 supply to
JU2. The VGC voltage must be clean to minimize unde-
sired amplitude modulation.
Evaluate: MAX2310/MAX2314
Interface Control
The interface port is designed to use a 20-pin ribbon
cable. Ten pins are signal lines, and the other 10 pins
are digital grounds. Pin 1 of the interface cable is red.
Pin 1 is also designated in silk screen on each of the
PC boards.
Detailed Description
The following sections cover the EV kits’ circuit blocks
in detail. (Refer to the MAX2310/MAX2312/MAX2314/
MAX2316 data sheet for additional information.)
CDMA Inputs
The CDMA+ and CDMA- pins are differential inputs to
the VGAs of the MAX2310/MAX2314. The EV kit is con-
figured for single-ended (50Ω) operation at the CDMA
differential input connector. The on-board balun con-
verts this input to a differential signal for the
MAX2310/MAX2314. The impedance is set by the com-
bination of L4, R9, C19, C20, and the 4:1 impedance
ratio of the input balun.
FM Inputs
The FM+ and FM- pins are differential inputs to the
VGAs of the MAX2310/MAX2314. The EV kit is config-
ured for single-ended (50Ω) operation at the FM con-
nector. The matching network transforms 50Ω to 850Ω.
Gain = approximately 60dB
Note:
The balun loss is not taken into account. This loss
is typically less than 0.5dB.
REF Inputs
The REF port is AC-coupled and terminated for use
with a 50Ω signal source.
FM Mode
Perform the following steps to change to FM mode:
1) With the MAX2310/MAX2314 control screen active,
bring the MODE pin low by clicking on the "L" con-
trol button located near the middle of the screen
(MAX2310). Set the IN_SEL bit to "0." Click on the
“send data” button (MAX2314).
2) Connect a signal generator with 85.48MHz at -66dBm
and apply it to the FM port.
3) Configure an oscilloscope to measure a high-
impedance (10kΩ), 1Vp-p, 100kHz, differential
waveform. Connect it to the I or Q output.
I/Q Outputs
The I/Q outputs are self-biased baseband outputs.
PC Board Layout/Construction
The MAX2310/MAX2314 EV kits can serve as board
layout guides. Keep PC board trace lengths as short as
possible to minimize parasitics. Keep decoupling
capacitors close to the device, with a low-inductance
via connection to the ground plane.
The MAX2310/MAX2314 EV kits’ PC boards use 14mil-
wide traces for 50Ω traces. The PC board has an 8mil-
layer profile on FR4, with a 4.5 dielectric and 75mil
trace-to-ground-plane spacing.
3
_______________________________________________________________________________________
Evaluate: MAX2310/MAX2314
V
CC
A
V
CC
A
C1
47pF
R24
10k
BYP
1 DR
C30
3300pF
C46
0.01µF
FM+
FM
C17
10pF
24
CDMA DIFF
L4
180nH
R9
680Ω
CDMA-
5 TANK_L-
C6
12pF
6 TANK_H+
VGC
C21
0.01µF
7 TANK_H-
MODE
V
CC
V
CC
A
DATA
DATA
EN
REF
CLK
18
CLK
C22
0.01µF
QOUT+ 17
19
20
V
CC
D
C10
0.01µF
11
R7
49.9Ω
SHDN
13 IOUT+
R31
0Ω
J2
14
IOUT-
R32
0Ω
C11
0.01µF
C9
0.01µF
LOCK
15
LOCK
R22
47k
QOUT-
16
C35
0.01µF
R33
0Ω
12 SHDN
J1
9 V
CC
10 GND
EN
8
MODE
21
22
L2
18nH
R12
0Ω
JU3
JU2
VGC
C20
8pF
TOKO
4458D8-1011
V
CC
23
8pF
C19
T1
J5
25
J4
BYP
FM-
R23
10k
C29
R1
0Ω 0.033µF
2 CP_OUT
3 GND
CDMA+
4 TANK_L+
C2
5pF
L1
68nH
L3
1µH
L5
270nH
C18
0.01µF
C14
C15
C13
0.01µF
0.01µF
0.01µF
28
27
26
MAX2310/MAX2314 Evaluation Kits
Figure 1. MAX2310EV Kit Schematic
MAX2310
R2
10k
C3
18pF
R3
10k
R4
10k
C4
18pF
D3
R13
10k
R5
10k
C7
12pF
D4
C5
1.5pF
J3
R34
0Ω
J7
QOUT+
J8
QOUT-
V
CC
4
V
CC
C36
OPEN
JU1
R10
0Ω
R11
0Ω
REF
IOUT+
_______________________________________________________________________________________
IOUT-
R6
100Ω
C8
330pF
R8
100Ω
OPEN
10
9
8 MODE
V
CC
7 SHDN
6 FILTERED V
CC
R14
5 DATA
100Ω
EN
100Ω
R18
3 CLK
100Ω
LOCK
C25
330pF
V
CC
2 LOCK
1
CLK
C24
330pF
R16
4 EN
C23
330pF
L6
270nH
V
CC
C42
0.01µF
C12
330pF
OPEN
MODE
Figure 1. MAX2310EV Kit Schematic (continued)
JU10
V
CC
A
C27
10µF
C28
0.01µF
I
CC
A
C37
0.01µF
C33
47pF
JU11
V
CC
D
I
CC
D
C38
0.01µF
C34
47pF
SHDN
DATA
V
CC
Evaluate: MAX2310/MAX2314
_______________________________________________________________________________________
GND
MAX2310/MAX2314 Evaluation Kits
5

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