RF2163
Power sensing is implemented with the PWR SEN and PWR REF lines. The outputs of these pins are transistor collectors and
need to be pulled up to the supply through a resistor. PWR REF provides an output current proportional to the output stage bias
current, and PWR SEN provides an output current proportional to the total (RF and bias) current of the output stage. The pull-
lup resistors convert these currents to voltages, and the voltage difference between these two pins is proportional to the RF
current. See the graph, “VREF-VSENSE versus POUT”, for the response of this signal. This difference signal can be fed to a power
control circuit elsewhere in the end product, or it can be processed at the PA with additional circuitry and used to adjust the
VREG voltage(s) to implement automatic level control. Contact RFMD Sales or Applications Engineering for additional data and
guidance in using this feature.
The RF2163 has primarily been characterized with a voltage on VREG1 and VREG2 of 2.4VDC. However, the RF2163 will operate
from a wide range of control voltages. If you prefer to use a control voltage that is significantly different than 2.4VDC, contact
RFMD Sales or Applications Engineering for additional data and guidance.
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support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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RFMD [ RF MICRO DEVICES ]
