ANALOG DEVICES ADL6012-EVALZ Evaluation Board User Guide
- June 13, 2024
- Analog Devices
Table of Contents
ANALOG DEVICES ADL6012-EVALZ Evaluation Board
FEATURES
- Fully featured evaluation board for the ADL6012
- Specified up to 67 GHz
- 3.15 V to 5.25 V operation
EVALUATION KIT CONTENTS
ADL6012-EVALZ evaluation board
EQUIPMENT NEEDED
Analog signal generator up to 67 GHz (E8257D) High speed oscilloscope
(MSOS254A) DC voltmeter (34401A) 5 V power supply (E3631A) Differential probe
(1131A)
GENERAL DESCRIPTION
The ADL6012-EVALZ provides efficient evaluation of the ADL6012 2 GHz to 67 GHz
envelope detector. The ADL6012 has fast rise time and fall time responses,
around 1 ns depending on input power levels, with an output envelope bandwidth
of 500 MHz. The ADL6012-EVALZ provides the basic connections for the RF input
signal and the envelope output voltage. Differential envelope outputs on the
ADL6012- EVALZ can be directly connected to a high speed oscilloscope to
evaluate the differential envelope tracking capabilities. For full details on
the ADL6012, see the ADL6012 data sheet. Consult the ADL6012 data sheet in
conjunction with this user guide when using the ADL6012-EVALZ evaluation
board.
EVALUATION BOARD PHOTOGRAPH
EVALUATION BOARD SETUP EQUIPMENT
POWER SUPPLY
The ADL6012-EVALZ requires a single 5 V power supply. An external Agilent
E3631A power supply is acceptable to use to power the ADL6012-EVALZ with
current consumption around 33 mA. The ADL6012 can be disabled with the DIS
jumper. Short the jumper to disable the ADL6012.
RF INPUT
The Agilent E8257D analog signal generator is acceptable to use to generate a
continuous wave (CW) signal up to 67 GHz and provide the CW signal source to
the ADL6012-EVALZ. The RFIN connector on the ADL6012-EVALZ is 1.85 mm, rated
up to 67 GHz, and can be directly connected to the Agilent E8257D signal
generator.
HIGH SPEED OSCILLOSCOPE
The Keysight MSOS254A high speed oscilloscope is acceptable to use to
accurately measure the rise and fall times of the ADL6012. The Keysight
MSOS254A oscilloscope must have a bandwidth of 2 GHz or higher to accurately
measure the ADL6012 output response. The amplitude modulation (AM) signal and
the pulse modulated RF signal can be measured with a differential probe at the
envelope outputs with the high speed oscilloscope (see Figure 3). The Agilent
1331A differential probe is acceptable to use. If a differential probe is not
available, connect the VEH− and VEH+ Subminiature Version A (SMA) connectors
to the Keysight MSOS254A oscilloscope with 50 Ω, impedance controlled RF
cables terminated with 50 Ω at the oscilloscope inputs (see Figure 4). Ensure
that both RF cables are less than 2 inches in length to minimize reflections.
DC VOLTMETER
The Agilent 34401A dc voltmeter is acceptable to use to measure the constant
envelope voltage across the VEH+ and VEH− test points. This voltage is the
differential output voltage measured when the RF input is a CW with a constant
envelope.
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:
- Connect the E3631A negative terminal ground turret to the GND1 turret on the ADL6012-EVALZ.
- Connect the E3631A positive 5V terminal to the ADL6012-EVALZ VPOS turret.
- Set the E3631A power supply to 5 V and set the current limit to 100 mA.
- Turn on the E3631A 5 V power supply.
- 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.
- 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. 
EVALUATION BOARD SCHEMATIC AND ARTWORK
ORDERING INFORMATION
BILL OF MATERIALS
Qty| Designator| Description| Manufacturer| Part
Number
---|---|---|---|---
1| C1| Bypass capacitor to enable 0.1 μF| PPI| 0402BB104KW500
1| C2| Supply bypass capacitor, use microwave grade, place as| PPI|
0402BB104KW500
| | close to the VPOS pin as possible, 0.1 μF| |
1| C3| Supply bypass capacitor, use microwave grade, place as close to the
VPOS pin as possible, 100 pF| Murata| GCM1555C1H101JA16D
2| C5, C8| Bypass capacitor for common-mode voltage, place as close to the
VOCM pin as possible, 0.1 μF| PPI| 0402BB104KW500
2| C6, C7| AC coupling capacitors for envelope outputs, 1 μF| Yageo|
CC0402MRX5R6BB105
2| CAL1, CAL2| Connectors, placement for calibration trace, not installed| |
1| CAL_TRACE| RF trace for input level calibration| |
1| R2| Enable termination resistor, open, 49.9 Ω| Panasonic| ERJ2RKF49R9X
1| R3| Enable pull-up resistor to VPOS pin, 20 kΩ| Panasonic| ERJ2RKF2002X
1| R4| Differential output load resistor, open, not installed| |
3| R5 to R7| Resistor divider network for output common-mode voltage, open,
not installed| |
2| R9, R10| Series envelope output resistors, 1 kΩ| Panasonic| ERJ2RKF1001X
2| R11, R12| 0 Ω resistors| Panasonic| ERJ2GE0R00X
1| RFIN| 1.85 mm edge mount connector, Southwest| Southwest| 1892-03A-6
2| VEH+, VEH−| Envelope output SMA connectors, end launch, 50 Ω| Cinch|
142-0701-851
1| DIS| Disable jumper, short to ground to disable the device| Wurth|
61300211121
1| ACOM_VOCM| Analog input to control the common-mode voltage output, yellow|
Components Corporation| TP-104-01-04
1| VEH+_TP| Test point connected to VENV+, yellow| Components Corporation|
TP-104-01-04
1| VEH−_TP| Test point connected to VENV−, yellow| Components Corporation|
TP-104-01-04
2| GND1, GND2| Turrets connected to PCB ground, black| Mill-Max|
2308-2-00-80-00-00-07-0
1| VPOS| Power supply turret connected to VPOS pin, red| Components
Corporation| TP-104-01-04
1| DUT| ADL6012 IC| Analog Devices, Inc.|
ADL6012ACPZN-R7
2| J1, J2| Jumper headers, can be used to connect to active probe| Wurth|
61300211121
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References
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