_________________________Quick Start
The MAX2251 EV kit is fully assembled and factory test-
ed. Follow the instructions in the Connections and Setup
section for proper device evaluation.
Test Equipment Required
This section lists the test equipment recommended to
verify operation of the MAX2251. It is intended as a guide
only, and some substitutions are possible:
•An RF signal generator capable of delivering at least
+10dBm of output power at the operating frequency
with TDMA modulation (HP E4433G or equivalent)
•An RF power sensor capable of handling at least
+20dBm of output power at the operating frequency
(HP 8482A, or equivalent)
•A 20dB high-power attenuator
•An RF power meter capable of measuring up to
+20dBm of output power at the operating frequency
(HP EPM-441A or equivalent)
•An RF spectrum analyzer capable of measuring
ACPR in NADC modulation mode and covering the
MAX2251’s operating frequency range (Rohde and
Schwarz FSEA20, for example)
•A power supply capable of up to 1.5A at +2.8V to
+4.5V
•A high-impedance voltmeter for measuring the actual
operating voltage
•An ammeter for measuring the supply current
(optional)
•Two 50ΩSMA cables
•A network analyzer (HP 8753D, for example) to mea-
sure small-signal return loss and gain (optional)
Connections and Setup
This section provides a step-by-step guide to operating
the EV kit and testing the device’s functions. Do not
turn on the DC power or RF signal generator until all
connections are made:
1) Connect a 20dB high-power attenuator to the
RFOUT SMA connector on the EV kit. This will pre-
vent overloading the power sensor and the power
meter.
2) Connect a DC supply set to +3.3V (through an
ammeter, if desired), and connect the voltmeter to
the EV kit’s VCC and GND terminals.
3) Connect an RFIN signal generator to the RFIN SMA
connector. Set the generator for an 836MHz output
frequency at a 0dBm power level.
4) Connect the power sensor to the power meter.
Calibrate the power sensor for 836MHz. Set the
power meter offset to compensate the 20dB attenu-
ator plus any cable loss (between 0.5dB and 2dB).
5) Connect a power sensor to the 20dB high-power
attenuator.
6) Place the MODE jumper (JU1) in the VCC position
and the SHDN jumper (JU2) in the VCC position.
7) Turn on the DC supply. The supply current should
read approximately 210mA.
8) Activate the RF generator’s output. Set the RF gen-
erator’s output to produce a reading of +30dBm on
the power meter. Verify that the voltmeter reads
+3.3V. Iteratively adjust the power supply’s output
and the RF generator’s output to produce a +3.3V
reading on the voltmeter and a reading of +30dBm
on the power meter. The supply current should
increase to approximately 750mA.
Evaluates: MAX2251
MAX2251 Evaluation Kit
SUPPLIER PHONE
ATC 516-622-4700
AVX 803-946-0690
Coilcraft 847-639-6400
EFJohnson 402-474-4800
Kamaya 219-489-1533
Murata Electronics 800-831-9172
Component Suppliers
FAX
516-622-4748
803-626-3123
847-639-1469
402-474-4858
219-489-2261
814-238-0490
WEB
www.atceramics.com
www.avx-corp.com
www.coilcraft.com
www.efjohnson.com
www.kamaya.com
www.murata.com
ROHM 408-433-2225 408-434-0531 www.rohm.com
NEC 408-243-2111 408-243-2410 www.cel.com
Taiyo Yuden 408-573-4150 408-573-4159 www.t-yuden.com
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