MAX2511EVKIT Maxim Integrated Products, MAX2511EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX2511EVKIT
• Description: RF Modules & Development Tools MAX2511 EVAL KIT MAX2511 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX2511EVKIT

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

The following section provides instructions for operat-
ing the MAX2511 evaluation kit (EV kit) as an IF trans-
ceiver. The differential IF port (IF, IF) is a bidirectional
port configured for operation over a wide range of fre-
quencies (200MHz to 440MHz). The high-side oscillator
is configured for nominal 435.7MHz operation, with
approximately 100MHz total span. The TXIN, TXIN,
LIMOUT, and LIMOUT ports are configured for
10.7MHz operation.
This section lists the test equipment recommended for
verifying operation of the MAX2511. It is intended only
as a guide; some substitutions may be possible.
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This section provides step-by-step instructions for get-
ting the EV kit up and running in both Tx and Rx modes.
Perform the following steps to evaluate the MAX2511 in
Tx mode:
1) Make the DC connections: set the power supply to
2
_________________________Quick Start
MAX2511 Evaluation Kit
One (optionally two) RF signal generator capable of
delivering at least 0dBm of output power in the
10MHz to 500MHz frequency range (HP8656B,
HP8648A, or equivalent). One generator is required
to test the Rx and Tx signal paths; the other is used
optionally as an external LO source if the on-chip
oscillator is overdriven.
An RF spectrum analyzer that can cover the trans-
mitter’s output frequency range, as well as a few
harmonics (HP8560E, for example)
A voltmeter for measuring the RSSI output voltage
An oscilloscope for observing the limiter output
signals
A power supply that can provide at least 100mA at
+2.7V to +5.5V
Two voltage sources for providing the gain-control
(GC) pin voltage and the oscillator frequency-adjust
voltage (FADJ)
Two 50Ω SMA terminators
Optional: An RF 180° hybrid combiner or balun
(Anzac H-9 or equivalent). This is used for differen-
tial coupling into the IF and IF connectors on the
transceiver. If a hybrid is not available, these inputs
and outputs can be evaluated in a single-ended
configuration at a slight performance cost.
3V with a 100mA current limit, and connect it to the
_______________________________________________________________________________________
Test Equipment Required
Connections and Setup
Tx Mode
2) Enable Tx mode by putting 3-pin jumper TXEN in
3) Connect the spectrum analyzer to OSCOUT. Set the
5) Connect an RF generator to the TXIN input and set
6) Test the GC function by slowly lowering the voltage
7) When the transmitter is set up properly, you may
This section describes how to connect and use the
MAX2511’s receiver section.
1) Verify that DC connections have been made, per
4) Remove the SMA cable from the OSCOUT port.
VCC and GND terminals on the EV kit. Set one
voltage source to 2V, and connect it to the gain-
control terminal (labeled GC). Connect the other
voltage source to the FADJ pin and set it to 1.75V.
the “1-2” position and jumper RXEN in the “2-3”
position. This sets TXEN to V
The supply current should be about 40mA. (See
Table 1.)
analyzer to 435.7MHz center frequency with a
100MHz total span. Adjust the FADJ voltage source
to center the LO frequency at or near 435.7MHz. The
OSCOUT output power should be around -9dBm.
Connect the spectrum analyzer to IF. Terminate the
other output (IF(J9)) with a 50Ω SMA terminator.
Optionally, IF and IF can be combined using a 180°
balun. With no TXIN signal applied, the LO leakage
is the only transmitter signal observable.
it to 10.7MHz at -16dBm of output power. The spec-
trum analyzer should show an image-rejected out-
put spectrum with the desired signal at 425MHz,
the suppressed LO at 435.7MHz, and the image at
446.4MHz. You may need to fine tune the FADJ
voltage to keep the LO at the correct frequency.
Because the Tx output is loaded by the Rx input
(approximately 200Ω differential), the single-ended
Tx output power will be near -8.5dBm into the 50Ω
spectrum analyzer. If the Tx output were loaded with
100Ω differential, this would correspond to -2dBm.
on the GC pin from 2V to 0V. You will see at least a
40dB change in fundamental output power over this
voltage range. Note the decreasing supply current
draw with reduced output power due to the
MAX2511’s unique biasing scheme.
wish to test other features, such as shutdown mode
(both TXEN and RXEN jumpers set to “2-3”) (see
Table 1). The image rejection of the MAX2511 over
frequency can be checked by varying the TXIN and
LO frequencies.
step 1 in the Tx Mode section.
CC
and RXEN to GND.
Rx Mode