NXP Semiconductors BGA7210, User Manual

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UM10480 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 2 — 26 July 2011 5 of 13
NXP Semiconductors
UM10480
Variable gain amplifier BGA7210
5. Controlling the customer RF evaluation board
5.1 Improving linearity
The RF evaluation board is configured without using a shunt capacitor on the output.
Adding a shunt capacitor improves linearity around 2.8 GHz. For other operating
frequencies it is recommended not to add a shunt capacitor. Please refer to the Data
Sheet for performance information.
Place a shunt capacitor of 0.68 pF at a distance of 5.3 mm from the BGA7210 RF_OUT
pin, see
Figure 2 .
Fig 2. BGA7210 RF evaluation board PCB layout
aaa-000268