MAX3524EVKIT Maxim Integrated Products, MAX3524EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX3524EVKIT
• Description: Power Management Modules & Development Tools MAX3524 EVAL KIT MAX3524 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX3524EVKIT

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

The MAX3524 EV kit is fully assembled and factory test-
ed. Follow the instructions in the Connections and
Setup section for proper device evaluation.
This section provides a step-by-step guide to setting up
the MAX3524 EV kit and testing the broadband LNA. Do
not apply DC power or RF signals until all connec-
tions are made.
Note: The input to the LNA is preceded by a minimum
loss pad that transforms the source impedance from
50Ω to 75Ω. The insertion loss of this is pad is 5.7dB.
1) Connect a DC supply preset to +5V (through an
2) Perform a full two-port calibration on a network ana-
3) Connect port 1 and port 2 of a network analyzer to
4) Turn on the DC supply. The supply current should
MAX3524 Evaluation Kit
2
Two Power Supplies or a
Dual Voltage Power Supply
Network Analyzer
Cables (50Ω)
Voltmeter
Ammeter (optional)
Noise Figure Meter (optional)
ammeter, if desired) to the EV kit’s V
GND (J6) terminals. Do not turn on the supply.
lyzer at a power level of -25dBm. Refer to the net-
work analyzer’s operating manual for detailed
instructions.
the LNAIN SMA connector (J1) and LNAOUT SMA
connector (J7), respectively.
read approximately 85mA (if using an ammeter).
Measure DC voltage between J9 and J6 to ensure 5V
_______________________________________________________________________________________
Recommended Test Equipment
Broadband Low Noise Amplifier
Connections and Setup
One supply capable of
providing at least 200mA at
+4.75V to +5.25V to bias
the RF amplifier and the op
amp. The other supply to
test the closed-loop gain of
the op amp.
HP8753D or equivalent for
measuring RF power gain.
Two 50Ω cables with SMA
connectors.
To measure op amp output.
For measuring supply
current.
HP8970B or equivalent for
measuring the noise figure
of the RF amplifier.
Quick Start
CC
(J9) and
5) The network analyzer display should indicate a typi-
(The MAX3524 data sheet specifies voltage gain with a
3kΩ load. This typically results in a voltage gain of
15dB.)
Noise figure measurements are sensitive to board and
lab setup losses and parasitics. There are many tech-
niques and precautions for measuring a low-noise fig-
ure. Detailed explanation of these items goes beyond
the scope of this document. For more information on
how to perform this level of noise-figure measurement,
refer to the noise-figure meter operating manual, as well
as to Hewlett Packard application note #57-2, Noise
Figure Measurement Accuracy. The EV kit board con-
sists of a 50Ω to 75Ω pad at the input of the amplifier,
which introduces a loss of 5.72dB. To obtain the correct
noise figure of the MAX3524, subtract 5.72dB from the
measured noise figure.
1) Connect a DC supply preset to +5V (through an
2) Connect a second DC supply preset to +2V to the
3) Turn on the DC supplies.
4) Measure the output of the op amp at TP4 (Test Point
The MAX3524 EV kit can serve as a board layout guide.
Keep PC board trace lengths as short as possible to
minimize parasitics. Long PC board traces at the input
and output of the MAX3524 can degrade gain flatness.
Keep decoupling capacitors as close to the device as
possible, with a low inductance connection to the
ground plane.
operation. Adjust power supply output as needed.
cal gain of 4.25dB at 44MHz. The MAX3524 EV kit
utilizes a 50Ω to 75Ω pad. The insertion loss of this
pad is approximately 5.7dB. The actual gain of the
MAX3524 when driven by a 75Ω source is:
ammeter, if desired) to the EV kit’s V
GND (J6) terminals. Do not turn on the supply.
EV kit’s terminal J2 and GND (J6) terminals.
4) using the voltmeter. The voltmeter should display
approximately +2V, taking into account the input
resistor voltage-divider (1/2 and closed-loop gain
+2) of the op amp.
PC Board Layout Considerations
Measured Gain + 5.72dB
Closed-Loop Gain of Op Amp
Checking Noise Figure
CC
(J9) and