RF5652 datasheet(6/21 Pages) RFMD

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RF5652

DS120125

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3. 3.Bypass capacitors should be used on the DC supply lines. The VCC lines may be connected after the RF bypass and

decoupling capacitors to provide better isolation between each VCC line.

RF5652 PA production and system calibration recommendation:

It’s highly recommended to follow the DC biasing step and RF power settings in the production calibration or test.

1. Connect the RF cables of input and output then connect to the proper equipment.

2. Apply VCC, then VREG as per the data sheet recommendations.

3. Set PA in TX mode.

4. Apply PENABLE = high.

5. Set RF input to the desired frequency and initial RF input power at -20dBm. This will insure the Power amplifier is in a linear

state and not over driven.

6. Sweep RF from low to high output power and take measurements at the rated output power.

7. Insure that the output power at turn on doesn’t saturate the power amplifier. The recommended output power should be

about 10dB to 20dB below the nominal input power. xxStart calibrating from low to high power in reasonable steps until the

rated power is reached then take the measurements.

CAUTION: If the input signal exceeds the maximum rated input power specifications, the RF5652 could be permanently dam-

aged.

RF5652 Datasheet(PDF) 6 Page - RF Micro Devices