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MAX3541/MAX3542 Evaluation Kits
7)
8)
9)
Install and run the MAX3541/MAX3542 control
software. Software is available for download at
www.maxim-ic.com/evkitssoftware .
Load the default register settings from the control
software by clicking Edit: Load Defaults.
Connect the SMA connector labeled IF_OUT on
Layout Considerations
The MAX3541/MAX3542 EV kits serve as a guide for
PCB layout. Keep RF signal lines as short as possible
to minimize losses and radiation. Use controlled imped-
ance on all high-frequency traces. The exposed pad
must be soldered evenly to the board’s ground plane
the evaluation board to a spectrum analyzer or to
an oscilloscope.
10) Enable the RF signal generator’s output.
11) Set the center frequency to the IF frequency set on
the control software. Check the output.
Gain Adjustment Calculations
Add an additional 6dB to the voltage gain to account
for the 2:1 transformer on the output. Add another
3.96dB to the voltage gain to account for the minimum
loss pad (R10 and R11) on the input. When measuring
noise figure, account for 5.7dB power loss of the mini-
mum loss pad.
A 36MHz IF anti-aliasing filter is provided on the EV kits
(C9, C12, C21, C25, C28, C29, C31, C35, L3, L9, L10,
and L11). Anti-aliasing filter requirements vary depend-
ing on applications; users should consult their demodu-
lator vendors for more specific information.
for proper operation. Use abundant vias beneath the
exposed pad for maximum heat dissipation. Use abun-
dant ground vias between RF traces to minimize unde-
sired coupling.
To minimize coupling between different sections of the
IC, the ideal power-supply layout is a star configuration,
which has a large decoupling capacitor at the central
V CC node. The V CC traces branch out from this node,
with each trace going to separate V CC pins of the
MAX3541/MAX3542. Each V CC pin must have a bypass
capacitor with low impedance to ground at the frequen-
cy of interest. Do not share ground vias among multiple
connections to the PCB ground plane.
4
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