User Guide

EVAL-ADL8142

OPERATING THE ADL8142-EVALZ

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Rev. 0 | 3 of 5

A 2 V, 100 mA power supply is required to provide the bias to the

ADL8142 when using the ADL8142-EVALZ. Connect the 2 V power

supply to the SMT test point, VDD. Connect the ground reference to

Refer to the ADL8142 data sheet for the recommended resistor

values to achieve different supply currents. The following bias

Figure 3. Insertion Loss and Return Loss of the Through Calibration Path,

23 GHz to 31 GHz

Table 1. Insertion Loss and Return Loss of the Through Calibration Path

Frequency (GHz)

Insertion Loss

(dB)

Input Return

Loss (dB)

Output Return

Loss (dB)

23

−0.908

−24.304

−35.554

23.5

−0.959

−19.365

−21.21

24

−1.111

−14.038

−14.799

24.5

−1.299

−11.303

−11.85

25

−1.461

−9.793

−10.294

25.5

−1.537

−9.301

−9.71

26

−1.519

−9.532

−9.931

26.5

−1.438

−10.699

−11.062

27

−1.293

−12.907

−13.664

27.5

−1.177

−17.255

−19.039

28

−1.137

−21.744

−35.417

28.5

-1.235

−16.089

−17.334

29

−1.453

−11.593

−12.081

29.5

−1.705

−9.217

−9.417

30

−1.92

−7.958

−8.139

30.5

−1.993

−7.623

−7.823

31

−1.941

−8.134

−8.333

RECOMMENDED BIAS SEQUENCING

During Power-Up

To power up the ADL8142-EVALZ, take the following bias sequenc-

ing steps:

1. Connect the VDD power supply.

2. Set the VDD supply to 2 V.

3. Apply the RF input signal.

During Power-Down

To power down the ADL8142-EVALZ, take the following bias se-

quencing steps:

1. Turn off the RF input signal.

2. Set the VDD supply to 0 V.