Analog Devices ADL6012-EVALZ, User Manual

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UG-1675 ADL6012-EVALZ User Guide
Rev. 0 | Page 4 of 9
EVALUATION BOARD SETUP PROCEDURE
The ADL6012-EVALZ provides the basic connections to
evaluate the functionality of the
ADL6012 envelope detector
(see Figure 2).
To set up the ADL6012-EVALZ to evaluate the ADL6012 , take
the following steps:
1. Connect the E3631A negative terminal ground turret to
the GND1 turret on the ADL6012-EVALZ.
2. Connect the E3631A positive 5V terminal to the
ADL6012-EVALZ VPOS turret.
3. Set the E3631A power supply to 5 V and set the current
limit to 100 mA.
4. Turn on the E3631A 5 V power supply.
5. Connect the E8257D 67 GHz signal generator to the
1.8 mm edge RFIN connector on the ADL6012-EVALZ. Set
the Agilent E8257D frequency between 2 GHz and 67 GHz
and adjust the signal level according to the detection range
of the
ADL6012 .
6. Measure the differential envelope output voltage across the
VEH+ and VEH− turrets on the ADL6012-EVALZ using
either the two output turrets or the SMA connectors,
depending on the type of measurement.
DC-COUPLED CONSTANT ENVELOPE OUTPUT
MEASUREMENTS
Figure 2 shows the connections required to measure the
differential, constant envelope outputs (the dc voltage) across
the VEH+ and VEH−turrets. The Agilent 34401A voltmeter is
used to take the dc output measurements as the RF input power
varies across the
ADL6012 detection range.
HIGH SPEED PULSED OUTPUT MEASUREMENTS
For high speed pulse response measurements, use the
Agilent 1131A differential probe to measure the envelope output
response. See Figure 3 for the measurement points used to make
the connections to the ADL6012-EVALZ. The
ADL6012 is
designed to drive a 100 Ω differential load. Place a 100 Ω resistor
(R4) on the ADL6012-EVALZ to evaluate the
ADL6012 output
response to the differential load. Each envelope output has a
common-mode voltage of 2.5 V with the VPOS voltage at 5 V.
AM OUTPUT RESPONSE MEASUREMENTS
For AM output response measurements, the envelope outputs
can be connected to the Keysight MSOS254A oscilloscope with
a 50 Ω termination on each envelope output (see Figure 4). Each
envelope output on VEH+ and VEH− is ac-coupled on the
ADL6012-EVALZ. Use 50 Ω cables to connect the ADL6012-
EVALZ to the Keysight MSOS254A oscilloscope. Keep the
output cables as short as possible and at equal lengths to
minimize reflections from the load. Both the positive peaks and
negative peaks of the envelope are measured on each
oscilloscope channel.
AGILENT 34401A
POWER SUPPLY
E3631A 5V
E8257D SIGNAL GENERATOR
22
021
-00
2
Figure 2. Typical ADL6012 DC Measurement Setup