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RF3928B

DS120503

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.

Bias Instruction for RF3928B Evaluation Board

ESD Sensitive Material. Please use proper ESD precautions when handling devices of evaluation board. Evaluation board

requires additional external fan cooling. Connect all supplies before powering evaluation board.

1. Connect RF cables at RFIN and RFOUT.

2. Connect ground to the ground supply terminal, and ensure that both the VG and VD grounds are also connected to this

ground terminal.

3. Apply -6V to VG.

4. Apply 65V to VD.

6. Turn on the RF input.

NOTE: For optimal RF performance, consistent and optimal heat removal from the base of the package is required. A thin layer

of thermal grease should be applied to the interface between the base of the package and the equipment chassis. It is recom-

mended a small amount of thermal grease is applied to the underside of the device package. Even application and removal of

excess thermal grease can be achieved by spreading the thermal grease using a razor blade. The package should then be

bolted to the chassis and input and output leads soldered to the circuit board.

RFIN

RFOUT

Vg

Vd

RF3928B

2.8GHz to 3.4GHz