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PA2423U-EK1 Datasheet(PDF) 4 Page - SiGe Semiconductor, Inc.

Part No. PA2423U-EK1
Description  RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
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Manufacturer  SIGE [SiGe Semiconductor, Inc.]
Direct Link  http://www.sige.com
Logo SIGE - SiGe Semiconductor, Inc.

PA2423U-EK1 Datasheet(HTML) 4 Page - SiGe Semiconductor, Inc.

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PA2423U-EK1
RangeCharger
TM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
131-DST-02
Rev 1.3
Apr-19-2006
Confidential
4 of 8
QA041906
Test Equipment Required
The following test equipment is recommended when using the PA2423U-EK1:
One pulse generator capable of generating pulses up to 10 kHz, 0 V to 3.3 V.
Two power supplies capable of delivering 200 mA, 3.6 V for VCTL and VCC.
One RF signal generator with output signal up to 2.5 GHz, +6 dBm.
One spectrum analyzer that can measure signals up to 8 GHz.
Two SMA 3 dB pads
Two 20 dB couplers
One dual head power meter
Test Equipment Setup
1)
Ensure that all power supplies are OFF and signal generator output is OFF.
2)
Set the power meter frequency to 2.45 GHz and apply appropriate offsets compensating for test setup losses.
3)
Set the power supply VCC and VCTL voltage to 3.3 V.
4)
Connect the evaluation board to the test equipment as shown in Figure 3.
5)
Turn ON power supply VCC and VCTL.
6)
Pull up VRAMP to VCC by shorting Pin 2 and Pin 3 of JP3 with the female jumper.
7)
Switch the RF output of the signal generator to ON and adjust the signal generator output power to get 0 dBm at
the input to the evaluation board.
8)
The power meter should measure approximately 22.5 dBm.
9)
Sweep the input power level from -25 dBm to 0 dBm to get a POUT and ICC vs. PIN graph.
10) Pull VRAMP down to GND by shorting Pin 1 and Pin 2 of JP3 with the female jumper.
11) Measure ISTDBY and |S21|OFF .
12) With VRAMP pulled up to VCC, observe 2
nd and 3rd harmonics generated by PA2423U.
13) Connect the SYNC output of the pulse generator to the trigger input of the spectrum analyzer and oscilloscope.
Connect VRAMP to the Pulse Generator with square wave output of 0-VCC pk-pk, use the oscilloscope to set the
waveform amplitude. See Figure 4 for the equipment setup.
14) Reduce span on the spectrum analyzer to 0 Hz, set the oscilloscope and spectrum analyser trigger to external
and reduce sweep time to 50 µsec.
15) With the RBW and VBW set to maximum on the spectrum analyser (if set too low this will limit the speed of the
rising and falling edges) the rising and falling times of the RF output signal pulse can be measured. Rising edge
and falling edges should be <1 µsec.
The RF input signal is applied to the RFIN SMA connector on the application board. It is recommended to keep this
signal level below +8 dBm to avoid possible PA damage. The PA output is taken from the board’s “RFOUT” SMA
connector. The amplifier evaluation board has been designed to interface directly with a 50 Ohm source and load im-
pedance for measurement. The matching components used on the application board are low-loss, high Q
components to minimize RF loss.
Note: Applying the wrong polarity to the evaluation board will damage the power amplifier.


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