SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Application Product Description IEEE 802.11b 2.4GHz Cordless Phones The SE2520L-EK3 Evaluation Kit is a tool that is intended to demonstrate the advantages of the RangeChargerTM SE2520L Power Amplifier and assist customers into full-scale production. The board facilitates evaluation, experimentation and investigation with various modes of operation of the SE2520L. The board demonstrates the SE2520L in an application where matching, filtering, and switching are employed. The SE2520L-EK3 design and layout can be quickly and easily transferred into a production design. Features Fully designed and tested 802.11b transmitter front-end using the SE2520L power amplifier Demonstrates the capabilities of the SE2520L in 802.1b applications Optimized matching networks and harmonic filter Power Detector, Rx/Tx Switch and Diversity Switch included Ready to be designed into production. The SE2520L-EK3 Evaluation Kit comprises of an SE2520L-EV3 evaluation board with 50Ω termination, an SE2520L-EK3 datasheet, and an SE2520L datasheet. Order Information Type Package Remark SE2520L-EK3 N/A None Functional Block Diagram SE2520L Evaluation Board Diagram VCC (JP3) JP4 JP7 JP2 JP8 ` JP1 SE2520L Match Tx-Rx Switch Low Pass Filter Power Detector VCTL (JP3) JP5 VEN (JP3) 15-DST-03 Rev 1.1 Apr-24-2006 50 ohms Diversity Switch JP6 VDP (JP3) Confidential QA042406 1 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Picture SE2520L JP5 JP4 JP8 JP7 JP2 (RF OUT1) JP1 (RF IN) JP6 (RF OUT2) Pin 1 JP3 Figure 1: SE2520L-EV3 Contents Of Evaluation Kit Quantity 1 1 1 1 Description Reference SE2520L Evaluation Board SE2520L-EV3 SE2520L Evaluation Kit Datasheet 15-DST-02 SE2520L Datasheet 15-DST-01 50Ω Termination Table 1: Contents of Evaluation Kit Configuration Tables 2, 3 and 4 describe how the evaluation board can be configured. The evaluation kit is pre-configured when shipped to operate with the SE2520L enabled, in transmit mode, at maximum gain, with the signal output on JP2, and a 50Ω termination on JP6. RF Input A signal generator can be connected on header JP1 to drive the SE2520L which is matched to 50Ω. The recommended power level for 802.11b operation is approximately -8dBm. It is recommended to keep the input power level to a maximum of +8dBm to avoid potential damage of the SE2520L. RF Outputs The RF output can be measured on either JP2 or JP6 pending the setting of a diversity switch included on the evaluation board. The diversity switch settings are described in Table 4. It is recommended to terminate the unused RF output port with a 50Ω termination to avoid possible reflections. A receive mode can be emulated where RF outputs JP2 or JP3 are routed to a 50Ω termination via an Rx/Tx switch on the evaluation board. Table 3 describes how to control the Rx/Tx switch. 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 2 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Power and DC Controls The board is powered from a single 3.3V supply that is connected to the 4mm connectors on the board. +3.3V should be connected to pin 8 (VCC) on JP3 and GND to pin 7 on JP3. The SE2520L offers an analog power control and a digital enable/disable feature. To enable the SE2520L, jumper pins 2 and 3 on JP3. To disable the SE2520L, jumper pins 1 and 2 on JP3. A control voltage between 0V and 3.3V can also be applied on pin 5 of JP3 to set the amplifier gain thereby controlling the output power. Refer to the SE2520L data sheet for the relationship between power control pin voltage and output power. Jumper settings can also be employed to control gain. For maximum gain, jumper pins 5 and 6 on JP3. For minimum gain, jumper pins 4 and 5. JP3 Header Pins Description 8 3.3V (VCC) Supply Connection 7 Ground (GND) Connection 5 Gain Control Connection (VCTL), 0 – 3.3V Jumper Pins 5 and 6 Maximum Gain Jumper Pins 4 and 5 Minimum Gain Jumper Pins 2 and 3 Enables SE2520L Jumper Pins 1 and 2 Disables SE2520L Table 2: JP3 Header Settings Receive or transmit mode can be selected via an Rx/Tx switch on the evaluation board. Settings are described in Table 3 below. Mode Short JP4 To Short JP5 To Transmit GND VCC Receive VCC GND Illegal Mode GND GND Illegal Mode VCC VCC Table 3: Rx/Tx Switch Jumper Settings The evaluation board includes an antenna diversity switch. The RF output (JP2 or JP6) selection is described in Table 4 below. RF Output Short JP7 To Short JP8 To JP2 (Antenna 1) VCC GND JP6 (Antenna 2) GND VCC Illegal Mode GND GND Illegal Mode VCC VCC Table 4: RF Output Selection Jumper Settings Power Detector Output As shown in Figure 1, pin 10 (VPD) of header JP3 on the evaluation board is used to measure the output power. This output level is a voltage that changes with respect to the output power level, as shown in Figure 2. This detector can be used to monitor the average output power of the antenna connector, allowing the dynamic control of its output. Note: The transfer function shown in Figure 2 is valid when the evaluation board is operating with a 3.3 volt DC supply with its output terminated in 50Ω. 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 3 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information 2.00 1.80 1.60 VPD (V) 1.40 1.20 1.00 0.80 0.60 0.40 0.20 8 10 12 14 16 18 20 22 Output Power (dBm) Figure 2: Typical Power Detector Output (VPD) vs. Output Power Characteristic Evaluation Board Schematic VCC JP3 VCC GND VCC VCTL GND VCC VEN GND GND VPD 3 1 6 5 4 8 2 7 9 10 VCC VPD C10 C5 1000pF 10pF C6 C11 10pF 0.1uF JP4 C8 0.1uF C9 0.1uF R7 NF 1 VCTL 2 RFIN 3 VCC 1 L2 2.7nH RFOUT VEN VCC1 GN RFIN D VCC0 3 L1 3.3nH C4 1.0pF C2 10pF 6 HEADER R3 10R C1 1.8pF L3 3.6nH L4 3.6nH 1 2 VCC C13 0.1uF C12 1.0pF C17 1.2pF C24 NF C3 33pF R1 3K 3 SW1 J3 V2 GND J1 J2 V1 6 2 OPA338 4 + 3 R9 4.3K 4 6 RFOUT 1 1 C27 22pF C21 10pF R2 50R D1 SMS7630-020 R4 10R C26 220pF L5 3.3nH JP5 SW2 V1 J2 J1 GND V2 J3 GND IN GND JP2 SMA 3 2 3 2 1 AS179-92 VCC 1 2 3 HEADER R12 10K 5 AS179-92 5 R10 NF 4 C15 10pF R8 4.3K - C18 22pF C23 10pF C16 22pF 5 U2 1 HEADER R6 10R C20 10pF 5 4 JP8 3 2 1 10pF VCC VPD VCC 1 2 3 C25 0.1uF C7 U1 SE2520L GND IN GND JP1 SMA C14 10uF VCC HEADER 10 2 + C22 10pF R5 10R VCC C19 22pF RFOUT 2 1 GND IN GND JP6 SMA 3 2 JP7 3 2 1 HEADER R11 1.5K PCB Material - FR-4 Relative Dielectric Constant Er - 4.5 Board Thickness - 10 mil Copper oz. Figure 3: Evaluation Board Schematic Diagram 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 4 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Evaluation Board Bill Of Materials Item 1 2 3 4 5 Qty 5 2 1 1 1 6 9 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 1 4 1 25 26 27 28 29 30 1 2 2 1 4 1 1 2 1 1 3 22 pins 2 1 1 1 1 Reference C11,C13,C25,C8,C9 C12,C4 C17 C1 C10 C15,C2,C20,C21,C22,C23, C5,C6,C7 C14 C26 C16,C18,C19,C27 C3 C24 L2 L1,L5 L3,L4 R11 R3,R4,R5,R6 R12 R1 R8,R9 R2 R10 R7 D1 JP1, JP2, JP6 JP3,JP4,JP5,JP7,JP8 SW1, SW2 U1 U2 Part Description 0.1uF 1.0pF 1.2pF 1.8pF 1000pF Supplier Information Murata - GRP155R61A104KA01 Murata - GRP1555C1H1R0CZ01 Murata - GRP1555C1H1R2CZ01 Murata - GRP1555C1H1R8CZ01 Murata - GRP155R71H102KA01 10pF Murata - GRP1555C1H100JZ01 10uF 220pF 22pF 33pF NF 2.7nH 3.3nH 3.6nH 1.5KΩ 10KΩ 6.8KΩ 3KΩ 4.3KΩ 50Ω Not Fitted (NF) Not Fitted (NF) Diode SMA RF Connector 10 and 12 pin 0.1" pitch through header RF Switch Power Amplifier Op Amp PCB - FR4 50Ω Termination Panasonic - ECST1AX106R Murata - GRP155R71H221KA01 Murata - GRP1555C1H220JZ01 Murata - GRP1555C1H330JZ01 Murata - LQP15MN2N7B02B Murata - LQP15MN3N3B02B Murata - LQP15MN3N6B02B N/A N/A N/A N/A N/A N/A Alpha - SMS7630-020 Johnson - 142-0701-886 3M - 929647-09-36-I Alpha - AS179-92 SiGe - SE2520L TI - OPA338 Table 5: Evaluation Kit Bill of Materials 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 5 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Evaluation Board Layout Optimum layout of the evaluation board is critical. The input and output matching networks are dependent on the layout for the values of the output power, power added efficiency, current consumption, and harmonics generation. RF tracks should be as short as possible to reduce losses and minimize RF power emissions. 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 decoupled as close as possible to the IC pins, and the ground end of the decoupling capacitors should have the shortest path to the IC ground possible. The SE2520L requires three matching networks: input matching, inter-stage matching via its VCC1 pin and output matching. In total, only 7 critical components are required: 5 capacitors and 2 inductors. For specific performance tuning and power supply decoupling, additional components may be used. Input Matching Interstage Matching Output Matching The SE2520L's input impedance (Zin) at Pin = -8dBm and F=2.45GHz is Zin = (12+j*1.2)Ω. For maximum gain, the input of the SE2520L should be conjugately matched, i.e. Zs = (Zin)* = (12-j*1.2)Ω. The matching of the output of the first stage and input of the second stage is merged and requires the use of only one capacitor. The capacitor shown in the schematic on page 1, C3, is required for decoupling only. The dimensions of the microstrip line shown on Vcc1 is 10mils x 100mils. (FR4, 10mil thickness, top-ground). The SE2520L-EK3 is designed as to maximize the SE2520L's 1dB Compression Point (P1dB). A load impedance of ZL = (31.9+j*14.6)Ω is presented to the output of the PA. This is achieved with components L1, C2 and C4. Components C12, L3 and L4 form a low-pass filter to reduce the harmonics below FCC regulations. Table 6: Evaluation Board Matching Arrangement Note: Layout diagrams shown in Figures 4, 5, 6, 7, 8 and 9 are for information purposes only. They may not correctly show all traces, and are not to scale. Please contact your SiGe Semiconductor sales representative for the proper layout files. Figure 4: Copper Layer 1 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 6 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Figure 5: Copper Layer 2 (Ground Plane) Figure 6: Copper Layer 3 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 7 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Figure 7: Component Placement Figure 8: 6-Pin LPCC Printed Circuit Board Footprint 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 8 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information Figure 9: 6-Pin LPCC Package Drawing Notes: 1. 2. 3. 4. 5. Dimensions are in millimeters Tolerance 0.1mm unless otherwise specified Moisture/ Reflow Sensitivity Classification: Level 1 (IPC/JEDEC-J-STD-020A) Exposed heat/electrical ground pad at bottom of package Lead finish is 100% lead-free electrolytic tin. 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 9 of 10 SE2520L-EK3 RangeChargerTM 802.11b WLAN Evaluation Kit Preliminary Information http://www.sige.com Email: [email protected] Customer Service Locations: North America: 1050 Morrison Drive, Suite 100 Ottawa ON K2H 8K7 Canada Hong Kong Phone: +852 3428 7222 Fax: +852 3579 5450 Phone: +1 613 820 9244 Fax: +1 613 820 4933 San Diego Phone: +1 858 668 3541 (ext. 226) Fax: +1 858 668 3546 United Kingdom Phone: +44 1264 850754 Fax: +44 1264 852601 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. TM TM RangeCharger , StreamCharger , and PointCharger TM are trademarks owned by SiGe Semiconductor, Inc. Copyright 2006 SiGe Semiconductor, Inc. All Rights Reserved 15-DST-03 Rev 1.1 Apr-24-2006 Confidential QA042406 10 of 10