Test Procedure; Biasing Sequence - Analog Devices EVAL-ADRF5714 User Manual

User Guide

TEST PROCEDURE

BIASING SEQUENCE

To bias up the ADRF5714-EVALZ, take the following steps:
1. Ground the GND test point.
2. Bias up the VDD test point.
3. Bias up the VSS test point.
4. Bias up the D0 test point.
5. Apply an RF input signal.
The ADRF5714-EVALZ is shipped fully assembled and tested.
Figure 3 provides a basic test setup diagram to evaluate the
s-parameters using a network analyzer. Perform the following steps
to complete the test setup and to verify the operation of the
ADRF5714-EVALZ:
1. Connect the GND test point to the ground terminal of the power
supply.
2. Connect the VDD test point to the voltage output terminal of the
3.3 V supply.
3. Connect the VSS test point to the voltage output terminal of the
−3.3 V supply. Note that the current from the VDD test point
is around 130 μA and the current from the VSS test point is
around 500 μA.
4. Connect the D0 test point to the voltage output terminal of the
3.3 V supply. The ADRF5714
modes by connecting the control test points to 3.3 V or 0 V, as
shown in Table 3.
5. Connect a calibrated network analyzer to the ATTIN and ATT-
OUT 2.92 mm connectors. Sweep the frequency from 100 MHz
to 30 GHz and set the power to 10 dBm.
6. The ADRF5714-EVALZ is expected to have an insertion loss of
1.30 dB at 30 GHz. See the expected results in
Table 3. Control Voltage Truth Table
D0
Low
High
analog.com
can be configured in different
Figure 4.
Additional test equipment is needed to fully evaluate the device
functions and performance.
For third-order intercept point evaluation, use two signal generators
and a spectrum analyzer. A high isolation power combiner is also
recommended.
For power compression and power handling evaluations, use a 2-
channel power meter and a signal generator. A high enough power
amplifier is also recommended at the input. Test accessories, such
as couplers and attenuators, must have enough power handling.
Note that the measurements performed at the 2.92 mm connectors
of the ADRF5714-EVALZ include the losses of the 2.92 mm con-
nectors and the PCB. The thru line must be measured to calibrate
out the effects on the ADRF5714-EVALZ. The thru line is the
summation of an RF input line and an RF output line that are
connected to the device and equal in length.
Attenuation State (dB)
0 (reference)
16
EVAL-ADRF5714
Figure 3. Test Setup Diagram
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