MAX2510EVKIT-SO Maxim Integrated Products, MAX2510EVKIT-SO Datasheet - Page 4

• Manufacturer Part Number: MAX2510EVKIT-SO
• Description: RF Modules & Development Tools MAX2510 EVAL KIT MAX2510 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX2510EVKIT-SO

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

shunt element across the inputs. The additional series
elements have been replaced by 0Ω shorts, and the
additional shunt element is not installed. Refer to the
MAX2510 data sheet for more information on designing
a matching network for this port.
The receive downconverter mixer’s output appears at
the MIXOUT pin (a current source that can drive a
165Ω load to 2Vp-p). The MIXOUT pin is terminated
with a net 330Ω (R10 + R11) for proper match to the
bandpass filter (Z
MIXOUT is 330Ω   330Ω = 165Ω.
The EV kit design allows separate testing of the
MAX2510’s Rx mixer and limiter sections for testing the
Rx mixer only. Coupling capacitor C20 is used to con-
nect the node between R10 and R11 to an external
SMA connector (MIXOUT). For these tests, the filter
(U2) must be removed, and R10 replaced with a 140Ω
resistor. This network has some attenuation, but pre-
sents the correct impedance to the MIXOUT pin and
provides a nearly 50Ω output impedance for measure-
ment. The attenuation is 11.2dB.
The MAX2510 EV kit can be modified to allow separate
testing of the limiter only, similar to the receive mixer in
the previous section. The filter (U2) must be removed.
This allows the limiter SMA connector to be used as a
direct input to the limiter.
The downconverted, limited signal appears at the
LIMOUT and LIMOUT pins as a 1.2Vp-p differential
voltage (600mVp-p per side). For single-ended use, the
unused side can be left open. The limiter outputs can
deliver this voltage across a load as low as 250Ω.
MAX2510 Evaluation Kit
4
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O
= 330Ω). Therefore, the net load at
Receiver Output
Limiter Output
Limiter Input
A good PC board is an essential part of an RF circuit
design. The EV kit PC board can serve as a guide for
laying out a board using the MAX2510.
The layout of the RXIN and RXIN input matching net-
work should be layed out symmetrically to provide the
best input balance if used as a differential input. The
TXOUT and TXOUT biasing networks should also be
layed out symmetrically to present an equal load
impedance on each pin.
The MAX2510’s I, I, Q, and Q inputs are high imped-
ance; take care to minimize potential unwanted cou-
pling into these pins. The easiest way to accomplish
this is to keep the trace length to a minimum.
Each V
0.047µF decoupling capacitor. This minimizes supply
coupling from one section of the MAX2510 to another.
A star topology for the supply layout, in which each
V
nection to a central V
coupling between sections of the MAX2510.
______________________Layout Issues
CC
node on the MAX2510 circuit has a separate con-
CC
node on a PC board should have its own
Rx Inputs and Tx Outputs
Power-Supply Decoupling
CC
node, can further minimize
Baseband Inputs