MAX2411AEVKIT Maxim Integrated Products, MAX2411AEVKIT Datasheet - Page 3

• Manufacturer Part Number: MAX2411AEVKIT
• Description: RF Modules & Development Tools MAX2411A EVAL KIT MAX2411A EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX2411AEVKIT

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

3) Connect one RF signal generator (with the output
4) Connect the other RF signal generator (with the out-
5) Connect the TXMXOUT SMA connector to the spec-
6) Turn on the DC supply, LO signal generator, and IF
7) The supply current should typically read 30mA. The
8) To observe the remainder of the TX mixer output
The MAX2411A EV kit circuitry is described in this section.
For more detailed information about the operation of
the device itself, please consult the MAX2411A data sheet.
The MAX2411A has a unique differential, bidirectional
IF port, allowing the sharing of TX and RX IF filters. To
evaluate the part with the EV kit, a balun is used to con-
vert the single-ended IF input or output at the SMA con-
nector to a differential signal across the IF and
In a typical application, a differential filter would be
used, and the filter would connect to a compatible IF
part, such as the MAX2511 or MAX2510.
At the IF and IF pins, inductors L3, L4, L11, and L12
provide a matching network for TX and RX mode, as
well as providing DC bias in RX mode. Capacitors C12
and C13 provide DC blocking to the balun. An extra
component footprint, R4, is provided to resistively ter-
minate this IF port. R4 can also be used for other
experimentation. The balun, L5, provides 4:1 imped-
ance transformation and differential to single-ended
conversion. The other side of the balun is connected to
the IF SMA connector. Component footprints R5, R6,
and R7 are provided for experimentation.
_______________ Detailed Description
disabled) to the LO SMA connector. Set the fre-
quency to 1.5GHz and the output power to -10dBm.
This is the LO signal.
put disabled) to the IF SMA connector. Set the gen-
erator to a frequency of 400MHz and a power level
of -32dBm. This is the IF input signal.
trum analyzer. Configure the analyzer for a center
frequency of 1.9GHz, a reference level of 0dBm,
and 200MHz total span.
input signal generator.
spectrum analyzer should show a 1.9GHz signal,
indicating a conversion gain of typically 8.5dB after
accounting for cable and balun losses. The balun
loss is typically 1dB at 400MHz.
spectrum, increase the span on the spectrum ana-
lyzer from 200MHz to 2GHz.
_______________________________________________________________________________________
Bidirectional IF Port
IF pins.
MAX2411A Evaluation Kit
This section describes the LNA and receive mixer sec-
tions of the MAX2411A EV kit.
The LNA circuitry consists of two DC blocking capaci-
tors, one at the input (C7) and one at the output (C17).
A shunt capacitor, C21, is used as a simple input
matching network.
The receive mixer's input, RXMXIN, requires a simple
matching network. C16 provides DC blocking, and L8
is used to match the input pin to 50 . Component foot-
print C22 is available for additional matching network
prototyping. The output of the receive mixer appears at
the bidirectional IF port in receive mode.
This section describes the PA driver and transmit mixer
sections of the MAX2411A EV kit.
The PA driver amplifier input is internally matched to
50
for DC blocking. The gain of the PA driver is adjustable
by applying a voltage on the middle pin of the V
jumper, which is connected through a 1k
to the GC pin on the MAX2411A. Alternatively, by
inserting a shunt, it is possible to set this voltage to
ground or V
nected to ground, and the "Logic 1" position is connected
to V
The transmit mixer output appears on the TXMXOUT
pin, which requires a pull-up inductor to V
matching network to a 50
of inductors L2 and L13. C19 provides DC blocking.
The EV kit’s LO input has a DC blocking capacitor
(C20). No other circuitry is required. For more informa-
tion on the LO port, including the optional use of a dif-
ferential LO source, consult the MAX2411A data sheet.
CC
for 1.9GHz operation; capacitor C11 is necessary
.
CC
. The position labeled "Logic 0" is con-
Low-Noise Amplifier (LNA)
load impedance consisting
Local Oscillator (LO)
PA Driver Amplifier
TX Mixer Output
RX Mixer Input
Transmitter
CC
resistor (R3)
Receiver
(L2) and a
GC
3