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RFHA1027 Datasheet(PDF) 8 Page - RF Micro Devices |
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RFHA1027 Datasheet(HTML) 8 Page - RF Micro Devices |
8 / 10 page RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 DS140204 For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com. The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 8 of 10 RFHA1027 Bias Instruction for RFHA1027 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 -8V to VG. 4. Apply 50V to VD. 5. Increase VG until drain current reaches 750mA or desired bias point. 6. Turn on the RF input. IMPORTANT NOTE: Depletion mode device - when biasing the device VG must be applied BEFORE VD. When removing bias VD must be removed BEFORE VG is removed. Failure to follow sequencing will cause the device to fail. 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 recommended 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. |
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