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PA2423L-EK1
RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
Application
Bluetooth USB dongles PCMCIA, flash cards Access points 2.4 GHz cordless telephones
TM
Product Description
The PA2423L-EK1 evaluation kit provides an easy to use, self-contained system for evaluating the RF performance and DC parameters of the PA2423L amplifier. The PA2423L evaluation board requires minimal board area and components and in addition, it has been designed to allow the PA2423L to meet the Bluetooth tm Class 1 wireless technology specifications, with particular attention to gain and output power. Each evaluation kit contains: * Pre-assembled evaluation board with input & output matching networks. Standard SMA connectors for interconnection to test equipment A test report of the delivered board A PA2423L datasheet A PA2423L-EK1 data sheet
Features
Easy evaluation of the PA2423L Power Amplifier Low Cost Design - 8 components required Minimum board space required - 340 mils x 220 mils High Output Power - 22.5 dBm Schematic and layout ready for production builds Lead free 6 pin QFN Package
* * *
Order Information
Part Number PA2423L PA2423L-R PA2423L-EK1 Package 6 pin - QFN 6 pin - QFN Evaluation Kit Remark Samples Tape & Reel
Functional Block Diagram
SMA RFIN
Input Match
PA2423L
Header
Output Match
SMA RFOUT
PA2423L-EK1 EvaluationBoard
GND
VRAMP
VCC
VCTL
Figure 1: PA2423L-EK1 Evaluation Board Block Diagram
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PA2423L-EK1
RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
Evaluation Board Schematic
Figure 2: PA2423L Evaluation Board Schematic Diagram Please Note: The RFOUT connector forms part of the output match of the power amplifier.
Pin VCC GND VCC VCTL
Pin Number 1 2 3 4
Description Supply Voltage Ground Supply Voltage Power and Gain Control
GND VCC VRAMP GND
5 6 7 8
Ground Supply Voltage PA Enable Pin Ground
Recommended setting Connect system supply voltage Connect to system ground Use this VCC to connect to VCTL signal with a shorting link Connect to 3.3 V (VCC) for maximum gain and power output. For power control connect to a variable voltage source between 0 V and 3.3 V. Provided as a ground connection for the VCTL signal. Use this VCC to connect to VRAMP signal with a shorting link 0 V - 1.5 V applied = Device Disabled 2 V - VCC applied = Device Enabled Provided as a ground connection for the VRAMP signal
Table 1: Power and Analog I/O Header (JP3) Note: It is recommended to use proper engineering connection practices by making RF and digital connections prior to turning on the power supply.
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RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
Evaluation Board Bill of Materials
The following components are used in the design of the PA2423L-EK1 evaluation board. As a reference, potential suppliers of these components are provided. SiGe Semiconductor does not endorse any specific vendor. In most cases, similar components from other suppliers will provide satisfactory performance. The minimum required components, as defined inside the heavy black box in the schematic (Figure 2), are designated as `required components'. These components are detailed in Table 2. Please note, that all components are dual sourced. Table 3 identifies an alternate supplier for the components.
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Reference C1 C2 C3 C4 C5,C6,C7 C8 C9,C13 C10 C11 C12 C14 JP1,JP2 JP3 L1 PCB1 U1 Qty 1 1 1 1 3 1 2 1 1 1 1 2 1 1 1 1 Part 5.6pF 2.0pF 15pF 0.5pF 10pF 0.1uF 0.1uF 1000pF 0.1uF 1.5pF 10uF, 10V SMA 8 HEADER 1.5nH 1301-04 PA2423L Tolerance 5% 5% 5% 5% 5% 80%/-20% 80%/-20% 10% 10% 5% 20% 10% Footprint 0402 0402 0402 0402 0402 0603 0402 0402 0402 0402 0402 6-QFN Type NPO NPO NPO NPO NPO Y5V Y5V X7R X5R NPO Tantalum Multilayer Supplier Murata Murata Murata Murata Murata Murata Murata Murata Murata Murata Panasonic Johnson 8 Pin 0.1 inch Header Toko SiGe SiGe Supplier Part No GRP1555C1H5R6DZ01 GRP1555C1H2R0CZ01 GRP1555C1H150JZ01 GRP1555C1HR50CZ01 GRP1555C1H100JZ01 GRM188F51E104ZA01 GRP155F51C104ZA01 GRP155R71H102KA01 GRP155R61C104KA01 GRP1555C1H1R5CZ01 ECS-T1AX106R 142-0701-886 LL1005-FHL1N5S -
Table 2: PA2423L Bill of Materials
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Reference C1 C2 C3 C4 C5,C6,C7 C8 C9,C13 C10 C11 C12 C14 JP1,JP2 JP3 L1 PCB1 U1 Qty 1 1 1 1 3 1 2 1 1 1 1 2 1 1 1 1 Part 5.6pF 2.0pF 15pF 0.5pF 10pF 0.1uF 0.1uF 1000pF 0.1uF 1.5pF 10uF, 10V SMA 8 HEADER 1.5nH 1301-04 PA2423L Tolerance 5% 5% 5% 5% 5% 80%/-20% 80%/-20% 10% 10% 5% 20% 10% Footprint 0402 0402 0402 0402 0402 0603 0402 0402 0402 0402 0402 6-QFN Type NPO NPO NPO NPO NPO Y5V Y5V X7R X5R NPO Tantalum Multilayer Alternate Source Phycomp Phycomp Phycomp Phycomp Phycomp Phycomp Phycomp Phycomp Phycomp Alternate Source Part No 0402CG569C9B200 0402CG209C9B200 0402CG150J9B200 0402CG508C9B200 0402CG100J9B200 06032F104Z8B20D 04022F104Z7B20D 04022R102K9B200 0402CG159C9B200 -
Table 3: PA2423L Bill of Materials Alternate Component Supplier
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RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
Test Equipment Required
The following test equipment is recommended when using the PA2423L-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) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) Ensure that all power supplies are OFF and signal generator output is OFF. Set the power meter frequency to 2.45 GHz and apply appropriate offsets compensating for test setup losses. Set the power supply VCC and VCTL voltage to 3.3 V. Connect the evaluation board to the test equipment as shown in Figure 3. Turn ON power supply VCC and VCTL. Pull up VRAMP to VCC by shorting Pin2 and Pin3 of JP3 with the female jumper. 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. The power meter should measure approximately 22.5 dBm. Sweep the input power level from -25 dBm to 0 dBm to get a POUT and ICC vs. PIN graph. Pull VRAMP down to GND by shorting Pin1 and Pin2 of JP3 with the female jumper. Measure ISTDBY and |S21|OFF . nd rd With VRAMP pulled up to VCC, observe 2 and 3 harmonics generated by PA2423L. 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 eqipment setup. Reduce span on the spectrum analyzer to 0 Hz, set the oscilloscope and spectrum analyzer trigger to external and reduce sweep time to 50 sec. With the RBW and VBW set to maximum on the spectrum analyzer (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 sec.
14) 15)
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 impedance 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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PA2423L-EK1
RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
Power Supply
VCTL Directional Coupler Signal Generator
-20dB
VRAMP
VCC RF OUT Directional Coupler 3dB pad
-20dB
3dB Pad
PA2423L-EK1 EVALUATION BOARD
RF IN
Spectrum Analyzer
Power Head Power Meter
PowerHead Power Meter
Figure 3: Test Equipment Setup for Static Measurement
Oscilloscope
Pulse Generator SYN
Power Supply
Signal Generator
-20dB
3dB Pad
PA2423L-EK1 EVALUATION BOARD
RF OUT
Directional Coupler
VRAMP RF IN
VCC VCTL Directional Coupler 3dB pad
-20dB Trigger in
Spectrum Analyzer
Power Head Power Meter
PowerHead Power Meter
Figure 4: Test Equipment Setup for Dynamic Measurement
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RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
Layout
Optimum layout of the application board is critical; the input and output matching networks are layout dependent and will affect gain, output power, power added efficiency, current consumption and harmonics generation. The connectors do form part of the input and output network. The routing to Vcc1 forms the interstage match for the power amplifier. As a reference design, the evaluation board has been optimized from a component and layout perspective to maximize the performance of the PA2423L. Based on the schematic, the layout of the evaluation board is shown in Figure 5. This information is also available as gerber files, for ease of use. Care should be taken to avoid routing the RF output track next to Vcc1 as this provides feedback around the output stage resulting in a loss in performance. The exposed pad at the bottom of the package is the ground connection for the IC. The ground vias should be placed as close as possible to this pad. All VCC lines should be well decoupled keeping the ground end of the decoupling capacitors as short as possible. The decoupling should avoid a ground return loop to the IC ground.
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PA2423L-EK1
RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
Evaluation Board Layout
(a)
(b)
(c)
Figure 5: PCB Board Layout (a) Top Layer, (b) Middle Layer (Ground Plane) and (c) Bottom Layer (VCC Traces)
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Rev 2.3
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PA2423L-EK1
RangeChargerTM 2.4 GHz BluetoothTM Power Amplifier Evaluation Kit
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Product Preview The datasheet contains information from the product concept specification. SiGe Semiconductor, Inc. reserves the right to change information at any time without notification. Preliminary Information The datasheet contains information from the design target specification. SiGe Semiconductor, Inc. reserves the right to change information at any time without notification. Production testing may not include testing of all parameters. Information furnished is believed to be accurate and reliable and is provided on an "as is" basis. SiGe Semiconductor, Inc. assumes no responsibility or liability for the direct or indirect consequences of use of such information nor for any infringement of patents or other rights of third parties, which may result from its use. No license or indemnity is granted by implication or otherwise under any patent or other intellectual property rights of SiGe Semiconductor, Inc. or third parties. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SiGe Semiconductor, Inc. products are NOT authorized for use in implantation or life support applications or systems without express written approval from SiGe Semiconductor, Inc. RangeCharger , StreamCharger , and PointCharger Copyright 2005 SiGe Semiconductor, Inc. All Rights Reserved
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are trademarks owned by SiGe Semiconductor, Inc.
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