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 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). PC board
pads (J12, J13, J14, J15) are available for installing
low-inductance oscilloscope probe points, if desired.

Features

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)

Evaluate: MAX2310/MAX2314

MAX2310/MAX2314 Evaluation Kits

________________________________________________________________ Maxim Integrated Products

19-1507; Rev 1; 12/00

Component List

PART

MAX2310EVKIT

MAX2314EVKIT

-40°C to +85°C

TEMP. RANGE

IC PACKAGE

28 QSOP

Ordering Information

8pF ±10%, 25V min ceramic
capacitors (0402)

C19, C20

0.01µF ±10%, 25V min ceramic
capacitors (0402)

C9, C10, C11,

C13, C14, C15,
C18, C21, C22,
C28, C35, C37,

C38, C42, C46

330pF ±10%, 25V min ceramic
capacitors (0402)

C8, C12, C23,

C24, C25

12pF ±10%, 25V min ceramic
capacitors (0402) (MAX2310)

C6, C7

Open

C16, C26, C31,
C32, C36, C39,

C40, C41, C45

1.5pF ±0.1pF, 25V min ceramic
capacitor (0402) (MAX2310)

18pF ±10%, 25V min ceramic
capacitors (0402)

C3, C4

DESIGNATION

5pF ±0.1pF, 25V min ceramic
capacitor (0402)

47pF ±10%, 25V min ceramic
capacitors (0402)

C1, C33, C34

DESCRIPTION

QTY

10pF ±10%, 25V min ceramic
capacitor (0402)

C17

Note: To evaluate the MAX2312 or MAX2316, order the
MAX2312EVKIT or MAX2316EVKIT.

0.033µF ±10%, 25V min ceramic
capacitor (0402)

C29

Varactor diode
Alpha SMV1255-003

Open

Varactor diode (MAX2310)
Alpha SMV1255-003

3300pF ±10%, 25V min ceramic
capacitor (0402)

C30

DESIGNATION

DESCRIPTION

QTY

10µF ±10%, 16V min tantalum cap
AVX TAJC106K016

C27

270nH inductor
Coilcraft 0805CS-271 XKBC

180nH inductor
Coilcraft 0805CS-181TKBC (MAX2310)

1µH inductor
Coilcraft 1008CS-102 XKBC

18nH inductor (MAX2310)
Coilcraft 0805CS-220 XJBC

68nH inductor
Coilcraft 0805CS-680 XJBC

3-wire programming and interface
board

INTF2300

Interface Board

680nH inductor
Coilcraft 0805CS-681TKBC (MAX2314)

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.

Evaluate: MAX2310/MAX2314

MAX2310/MAX2314 Evaluation Kits

_______________________________________________________________________________________

Quick Start

The MAX2310/MAX2314 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 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.

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

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.

EQUIPMENT

DESCRIPTION

RF Signal
Generators (2)

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.

Component List (continued)

Oscilloscope

For viewing the demodulator out-
puts, 3-wire serial interface, and
other functions

Power Supply

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

Additional Voltage
Source

For external control of VGA functions
(optional)

Personal Computer

486DX33 or better, with Windows95

or Windows98

operating system and

a functional parallel port.

INTF2300 Interface
Board

Provided with EV kit

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

Digi-Key

218-681-6674

218-681-3380

Murata

949-852-2001

949-852-2002

Toko

708-297-0070

708-699-1194

Component Suppliers

Windows95 and Windows98 are registered trademarks
of Microsoft Corp.

Open

resistors (0402)

R1, R10, R12,

R31R34

47k

±5% resistors (0402)

R22, R26

10k

Bourns variable resistors

Digi-Key 3296W-104-ND

R13, R24

680

±1% resistor (0402)

49.9

±1% resistor (0402)

100

±5% resistors (0402)

R8, R14, R16,

R18

10k

±5% resistors (0402)

R2, R3, R23

DESIGNATION

DESCRIPTION

QTY

Open

R15, R17, R19,
R20, R21, R25,

R27R30, R35

Maxim MAX2310EEI or
MAX2314EEI IC

MAX2310/MAX2314 circuit board

None

MAX2310/MAX2312/MAX2314/
MAX2316 data sheet

None

20-pin ribbon cable

None

Balun transformer
Toko DB458-1011

Table 1. Recommended Equipment

resistors (0402) (MAX2310)

R11

10k

±5% (0402) (MAX2310)

R4, R5

1000pF ±10% (0402) (MAX2314)

C43

100

±5% resistor (0402)

(MAX2310)

Evaluate: MAX2310/MAX2314

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 50

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 (10k

), 1Vp-p, 100kHz differential

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.

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 (10k

), 1Vp-p, 100kHz, differential

waveform. Connect it to the I or Q output.

Adjustments and Control

VGC Adjust

The MAX2310/MAX2314 EV kits are configured 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 supply to
JU2. The VGC voltage must be clean to minimize unde-
sired amplitude modulation.

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 (50

) 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 (50

) operation at the FM con-

nector. The matching network transforms 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.

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 50

traces. The PC board has an 8mil-

layer profile on FR4, with a 4.5 dielectric and 75mil
trace-to-ground-plane spacing.

V (RMS)

1/2 10

PIN(dBm)

Gain

20log

2 2

OUTp p

Evaluate: MAX2310/MAX2314

MAX2310/MAX2314 Evaluation Kits

_______________________________________________________________________________________

Figure 1. MAX2310EV Kit Schematic

MAX2310

FM+

BYP

R10

10k

18pF

47pF

C46

0.01

68nH

18nH

5pF

C29

0.033

C30

3300pF

R23

10k

CP_OUT

GND

TANK_L+

TANK_L-

MODE

VGC

CDMA-

CDMA+

VGC

DATA

CLK

GND

REF

R11

10k

12pF

1.5pF

TANK_H+

TANK_H-

MODE

SHDN

C10

0.01

REF

IOUT+

IOUT-

49.9

R31

R32

0.01

C11

0.01

C13

0.01

C14

0.01

C15

0.01

JU2

R13

10k

JU3

R12

TOKO

DB458-1011

1
µ

270nH

8pF

C19

C20

8pF

C17

10pF

680

180nH

C18

0.01

CDMA DIFF

C21

0.01

LOCK

R22

47k

R33

QOUT-

CLK

LOCK

DATA

QOUT+

R34

C35

0.01

C22

0.01

IOUT+

IOUT-

QOUT-

QOUT+

BYP

FM-

SHDN

R24

10k

JU1

C36

OPEN

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MAX2310EVKIT

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MAX2310EVKIT