RF2668 查看數據表（PDF） - RF Micro Devices

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RF2668

CDMA/FM TRANSMIT MODULATOR, IF AGC, AND UPCONVERTER WITH INTEGRATED PLL

RF Micro Devices 

RF2668

Preliminary

Pin Function Description

Interface Schematic

47

VCC3

Supply voltage for the AGC and the Bandgap circuitry. A 1nF external

bypass capacitor is required and an additional 0.1µF will be required if

no other low frequency bypass capacitors are nearby. The trace length

between the pin and the bypass capacitors should be minimized. The

ground side of the bypass capacitors should connect immediately to

ground plane.

48

BG OUT Bandgap voltage reference. This voltage, constant over temperature

and supply variation, is used to bias internal circuits. A 1nF external

bypass capacitor is required.

5

5-78

Rev B4 010423

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