19-2869; Rev 0; 5/03
MAX2396 Evaluation Kit
General Description
The MAX2396 evaluation kit (EV kit) simplifies the evalu-
ation of the MAX2396 WCDMA direct-downconversion
receive IC. It is fully assembled and tested at the facto-
ry. Standard 50Ω SMA and BNC connectors are includ-
ed on the EV kit to allow quick and easy evaluation on
the test bench.
This document provides a list of equipment required to
evaluate the device, a straightforward test procedure to
verify functionality, a circuit schematic, a bill of materi-
als (BOM), and artwork for each layer of the PC board.
Features
o
EV Kit Is Fully Assembled and Tested
o
Fully Monolithic Direct-Conversion Receiver
Includes: Fully Integrated On-Chip RF VCO
Eliminates: External IF SAW + IF AGC + I/Q
Demodulator
o
Meets All 3GPP Receiver’s Standard
Requirements with at Least 3dB Margin on E
b
/N
o
o
Operates from a Single +2.7V to +3.3V Supply
o
Over 90dB of Gain-Control Range
o
Channel Selectivity Fully On-Chip, with Superior
ACS (>39dB)
o
SPI™-/QSPI™-/MICROWIRE™-Compatible 3-Wire
Serial Interface
o
Receiver Current Consumption
≈
31mA
o
On-Chip DC Offset Cancellation
o
Small 28-Pin QFN Leadless Package
Evaluates: MAX2396
Component Suppliers
SUPPLIER
Coilcraft
Digi-Key
Johnson
Mini-Circuits
Murata
Taiyo Yuden
PHONE
800-322-2645
800-344-4539
507-833-8822
718-934-4500
770-436-1300
800-322-2496
WEBSITE
www.coilcraft.com
www.digikey.com
www.johnsoncomponents.com
www.minicircuits.com
www.murata.com
www.t-yuden.com
Ordering Information
PART*
TEMP
RANGE
IC
APPLICATION
PACKAGE
IMT2000/UMTS
Note:
When contacting these suppliers, please specify you are
using the MAX2396.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
MAX2396EVKIT -40°C to +85°C 28 QFN
*Contact
factory for pricing and availability.
Component List
DESIGNATION QTY
AGC, TCXO
BG, CSB, I+, I-,
LOCK, Q+, Q-,
TAGC, TUNE
C1, C7, C14,
C16, C17, C24,
C41, C50, C51,
C55, C56, C57,
C59, C60
C2, C32
C3, C22
C4, C5
C6, C27, C28,
C33–C38, C40,
C42, C44, C45,
C48, C54, C58
2
9
DESCRIPTION
10kΩ variable resistors (potentiometer)
Digi-Key 5000K-ND
DESIGNATION QTY
C10–C13, C15,
C23, C29, C30,
C31
C26
14
100pF capacitors (0402)
Murata GRP1555C1H101J
C39, C43, C46,
C47
C49
C52
C53
C89
9
DESCRIPTION
Not installed
1µF capacitor (0603)
Taiyo Yuden JMK107BJ105MA-B
10µF tantalum capacitors (2012)
(R code/case 0805-compatible)
AVX TAJR106K006
47nF capacitor (0402)
Murata GRP155R71A473K
4.7nF capacitor (0402)
Murata GRP155R71H472K
39pF capacitor (0402)
Murata GRP1555C1H390J
0.1µF capacitor (0805)
Murata GRM21BR71E104K
1
4
2
2
2
10nF capacitors (0402)
Murata GRP155R71C103K
1000pF capacitors (0402)
Murata GRP155R71H102K
0Ω resistors (0402)
100nF capacitors (0402)
Murata GRP155R61A104K
1
1
1
1
16
________________________________________________________________
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.
MAX2396 Evaluation Kit
Evaluates: MAX2396
Component List (continued)
DESIGNATION QTY
C90
C101
FL1
GND, GND2,
GND3, JU37,
JU38,
VCC_EXT,
VCC_IC
G_LNA,
G_MXR,
SHDNB
1
1
1
DESCRIPTION
1.0µF capacitor (1206)
Murata GRM31MR71C105MA01L
0.01µF capacitor (0805)
Murata GRM216R71H103K
2140MHz saw filter (2140MHz)
Murata SAFSD2G14FA0T00R00
DESIGNATION QTY
L5
LD
LNA_IN,
LNA_OUT,
LO_TEST,
MXR_IN,
REF_IN
R13, R14
R2, R10, R11,
R16, R17
3
Open
R7, R22
R8
2
1
BNC (50Ω) PC board receptacles
(jacks)
Amphenol 31-5239-52RFX
—
R9, R18
R12, R15
R19, R25
R23
RBIAS
U1
U2
11
Open
U3, U4
U5
1
1
1
3.3nH inductor (0402)
Coilcraft 0402CS_3N3X
Open inductor (0402) (not installed)
1.8nH inductor (0402)
TOKO LL1005-FH1N8S
U9
Y1
2
1
1
1
1
1
DESCRIPTION
1.3pF capacitor (0402)
Murata GRP1555C1H1R3B
—
SMA end launch jack receptacles
0.031in
Johnson Components 142-0701-881
2.0pF capacitors (0402)
Murata GPR1555C1H2R0B
0Ω resistors (0402)
Open resistors (0402) (not installed)
100Ω resistor (0402)
10kΩ resistors (0402)
50Ω resistors (0402)
1kΩ resistors (0402)
330Ω resistor (0402)
12kΩ
±1%
resistor (0402)
MAX2396EGI WCDMA receiver
Open broadband RF balun (not
installed)
TDK HHM1537
MAX4444 low-distortion, differential-
to-single-ended line drivers
Frac-N sigma delta synthesizer
MAX2150EGI
MAX8867EUK28 linear regulator
15.36MHz volt control TCXO
(19.2MHz)
Kinseki VC-TCXO-208C3-15.36
5
7
—
2
5
2
1
2
2
2
1
1
1
1
I, Q
J9
JU20, JVCO,
VCC_BB,
VCC_CP,
VCC_DIG,
VCC_LNA,
VCC_LOGIC,
VCC_MXR,
VCC_REF,
VCC_TCXO,
VCC_VCO
L1
L2
L4
2
_______________________________________________________________________________________
MAX2396 Evaluation Kit
Quick Start
The MAX2396 EV kit is fully assembled and factory test-
ed. Follow the instructions in the
Connections and
Setup
section for proper device evaluation.
4) Set the signal generator for a 2140.18MHz CW
(unmodulated) output at -27dBm, and connect a
3dB pad to the DUT side of the SMA cable. Use the
power meter to set the input power to the DUT at
-30dBm. Use measured attenuators and/or the
signal generator’s internal step attenuators (-40dB)
to reduce the signal to -90dBm.
5) Connect the RF source’s SMA cable and attenua-
tors to the EV kit’s LNAIN SMA input.
6) Connect the BNC cable from either I or Q to the
spectrum analyzer. Connect the other output into
the oscilloscope—be sure to set the oscilloscope’s
inputs to 50Ω, and not 1MΩ. Cable loss at 180kHz
is negligible; as long as cables are about the same
length, no calibration is required at the output to
observe proper signal level, as well as proper I/Q
gain-and-phase balance.
7) Set one of the DC supplies to 2.8V and set a current
limit of 100mA (if available). Connect this supply
through the ammeter to VCC_IC, and readjust the
supply, if necessary, to get 2.8V at the IC when
powered up. This supply connection only powers
the IC on the EV kit—read the ammeter to watch IC
supply current for the receiver. Connect another
line directly from the 2.8V supply to VCC_EXT to
supply the external logic on the kit. Not having the
voltage drop of the ammeter in line means the volt-
age is slightly higher than VCC_IC, but this does
not cause a problem.
8) Set the other supplies for ±5.0V with a current limit
of about 100mA. Connect these supplies to the +5V,
GND, and -5V on the opposite side of the kit. These
are the bipolar supplies for the MAX4444 differential
line drivers that buffer the I/Q outputs. Note that all
GND test points are connected to the same ground
plane—it is only necessary to use one of them.
9) Set the spectrum analyzer to span from DC (mini-
mum sweep) to 2MHz. Set the reference level to
+10dBm.
10) Set the oscilloscope for a sweep rate of about
1µs/div, DC-coupling, with an amplitude scale of
about 100mV/div.
Evaluates: MAX2396
Test Equipment Required
This section lists the recommended test equipment to
verify the operation of the MAX2396 EV kit. It is intended
as a guide only, and some substitutions are possible:
• DC supply capable of delivering 200mA continuous
current at +5.0V
• DC supply capable of delivering 200mA continuous
current at -5.0V
• DC supply capable of delivering 50mA continuous
current at +2.8V
• DMM, to measure IC supply current
• HP 8648C or equivalent signal source capable of
generating -30dBm up to 2.2GHz
• HP 8561E or equivalent RF spectrum analyzer
(baseband spectrum only)
• TDS3012 or equivalent digitizing oscilloscope
• Windows
®
95/98/2000 PC with an available parallel port
Connections and Setup
This section provides a step-by-step guide to testing
the basic functionality of the EV kit:
1) Install the MAX2396 control software on a PC. This
software uses a 3rd-party DLL to allow communica-
tion through the parallel port: “DriverLINX” by
Scientific Software Tools (www.sstnet.com). The
Maxim installer installs this DLL for you automatically.
2) Connect the interface board and cable from the PC
parallel port to the EV kit header. Pin 1 on the rib-
bon cable is indicated with a stripe, and pin 1 on
the header is nearest to the corner of the board.
The interface board is just populated with logic
buffers to protect the parallel port against acciden-
tal shorts, but be careful with these connections.
3) Calibrate the power meter, with the low-power
head, at 2140MHz. A rough interpolation of the cal
factor does not introduce noticeable error if reading
the cal factor from a table.
Windows is a registered trademark of Microsoft Corp.
_______________________________________________________________________________________
3
MAX2396 Evaluation Kit
Evaluates: MAX2396
Testing the WCDMA Receiver
The power-up default state of the MAX2396 receiver is for:
• LO midband (2140MHz)
• LNA high gain
• Mixer high gain, normal linearity
• Powered on (out of shutdown)
1) Verify that the IC itself is drawing about 31mA (from
VCC_IC). The two MAX4444 differential line drivers
at the baseband outputs should draw about 80mA
from each of their supplies.
2) Use the AGC adjust potentiometer on the board to
set VAGC at +2.2V (maximum gain).
3) Spot-check the VCO tuning voltage (TUNE) to see
that the synthesizer on the MAX2150 is locked. The
voltage should be about midsupply with the RFLO
running at its power-up default of 2140MHz.
Disconnect any leads from this before continuing, as
the noise pickup onto the tuning line directly fre-
quency modulates the VCO, and degrades LO
phase noise.
4) Observe the 180kHz tone on the spectrum analyzer.
Adjust AGC to achieve a -3.5dBm output level.
5) The on-board TCXO has a fine-tuning control—the
other potentiometer on the EV kit allows for external
temperature compensation of the TCXO to further
decrease frequency error. Adjust the TCXO poten-
tiometer if desired to bring the output tone exactly
to 180kHz.
6) Observe the other output on the oscilloscope. At
these input power levels, the SNR is typically much
too low to see the output tone through the noise. If
available, use the internal lowpass filter option
(often 20MHz) and lots of averaging.
7) To make a gain/phase error measurement, connect
both outputs to the scope. Increase the input power
to about -50dBm, and back off the AGC until the
outputs are swinging about 0.42V
P-P
. Again, use
digital averaging to get both I and Q sinusoids visi-
ble on the scope. If automated measurements for
phase and amplitude are not available, use the cur-
sors to make the measurement. Calculate phase
error in degrees, and gain error in dB, and verify
that the results are better than 2 degrees and
0.6dB, respectively.
4
_______________________________________________________________________________________
MAX2396 Evaluation Kit
Evaluates: MAX2396
Figure 1a. MAX2396 EV Kit Schematic (Sheet 1 of 3)
_______________________________________________________________________________________
5
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