MAX2642EVKIT Maxim Integrated Products, MAX2642EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX2642EVKIT
• Description: RF Modules & Development Tools MAX2642 EVAL KIT MAX2642 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX2642EVKIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX2642/MAX2643 EV kits are fully assembled and
factory tested. Follow the instructions in the Connections
and Setup section for proper device evaluation.
• An RF signal generator capable of delivering -10dBm
• An RF spectrum analyzer that covers the operating
• A DC power supply capable of supplying +2.7V to
• Two 50Ω coaxial cables with SMA connectors
• An ammeter to measure supply current (optional)
• A noise figure meter (optional)
• A network analyzer for measuring gain and return
1) Connect a DC supply (preset to +3.0V) to the V
2) Set the RF generator for an output frequency of
3) Connect the coaxial cable from the RFOUT SMA con-
4) Turn on the DC supply. The supply current should
5) Activate the RF generator’s output. A signal on the
6) Optional: For the MAX2642, set the jumper JU2 to the
MAX2642/MAX2643 Evaluation Kits
2
of output power and a frequency range covering the
MAX2642/MAX2643 (800MHz to 1000MHz, for exam-
ple)
frequency range
+5.5V
loss (optional)
and GND terminals (through an ammeter, if desired)
on the EV kit.
900MHz at a power level of -30dBm. Connect the RF
generator’s output to the RFIN SMA connector.
nector to the spectrum analyzer.
read approximately 5mA (if using an ammeter).
spectrum analyzer’s display should indicate a typical
gain of +17dB after accounting for cable and board
losses.
V
+3.5dB.
_______________________________________________________________________________________
CC
position. The power gain should now be
Test Equipment Required
Connections and Setup
Checking Power Gain
Quick Start
CC
7) Optional: Another method of determining gain is by
Noise figure measurements on low-noise devices such
as the MAX2642/MAX2643 are extremely sensitive to
board and lab setup losses and parasitics. There are
many techniques and precautions for measuring low
noise figure. A detailed explanation of these items
would exceed the scope of this document. Take into
account PC board and external components loss when
performing noise-figure measurements. The typical
input losses on these EV kits is 0.25dB. For more infor-
mation on how to perform this level of noise-figure mea-
surement, refer to the noise-figure meter operating
manual and to Hewlett Packard’s application note #57-2,
Noise Figure Measurement Accuracy.
Good PC board layout is an essential part of an RF cir-
cuit’s design. The EV kit PC board can serve as a guide
for laying out a board using the MAX2642/MAX2643.
Generally, the V
a decoupling capacitor located close to the device,
and additional capacitors may be needed for long V
lines. This minimizes supply coupling. Proper grounding
of the GND pins is essential. Connect the GND pins to
the ground plane either directly, through vias, or both.
using a network analyzer. This has the advantage of
displaying gain vs. a swept frequency band, in addi-
tion to displaying input and output return loss. Refer
to the user manual of the network analyzer for setup
details.
CC
Layout Considerations
node on the PC board should have
Checking Noise Figure
CC