NBB-312 Ver la hoja de datos (PDF) - RF Micro Devices
Número de pieza
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Lista de partido
NBB-312 Datasheet PDF : 10 Pages
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NBB-312
Pin Names and Descriptions
Pin
Name
Description
1-3
GND
Ground connection. For best performance, keep traces physically
short and connect immediately to ground plane.
4
RFIN
RF input pin. This pin is NOT internally DC blocked. A DC blocking
capacitor, suitable for the frequency of operation, should be used
in most applications. DC coupling of the input is not allowed,
because this will override the internal feedback loop and cause
temperature instability.
5-7
GND
Ground connection. For best performance, keep traces physically
short and connect immediately to ground plane.
8
RFOUT
RF output and bias pin. Biasing is accomplished with an external
series resistor and choke inductor to VCC. The resistor is selected
to set the DC current into this pin to a desired level. The resistor
value is determined by the following equation:
Care should also be taken in the resistor selection to ensure that
the current into the part never exceeds maximum datasheet
operating current over the planned operating temperature. This
means that a resistor between the supply and this pin is always
required, even if a supply near 8.0V is available, to provide DC
feedback to prevent thermal runaway. Alternatively, a constant
current supply circuit may be implemented. Because DC is present
on this pin, a DC blocking capacitor, suitable for the frequency of
operation, should be used in most applications. The supply side of
the bias network should also be well bypassed.
9
GND
Ground connection. For best performance, keep traces physically
short and connect immediately to ground plane.
Interface Schematic
Package Drawing
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421
DS131014
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.
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