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| RF106 900 MHz Power Amplifier Product Description The RF106 is a class AB RF power amplifier for 900 MHz ISM band applications. It delivers output power proportional to the input signal power. The RF106 power amplifier, combined with Conexant's RF105 diSSTanceTM (digital Spread Spectrum Technology) transceiver, forms a complete system solution for a direct conversion 900 MHz diSSTance radio which is fully compliant with FCC Part 15 regulations in the ISM band. The RF106 is operational in the 900 MHz ISM band with supply voltage ranging from 2.7V to 5V. It is available in a small 20-pin TSSOP package, shown in Figure 1. Figure 2 shows a block diagram for the RF106. Features * * * * * * Class AB-type RF power amplifier 100 mW peak envelope output power Very fast settling from standby mode to active mode Efficient high output power operation Very few external components required 20-pin TSSOP package Applications * * * * * * * diSSTance-technology cordless telephone Direct sequence spread spectrum systems Frequency hopping spread spectrum systems Wireless LANs Wireless modems Wireless security Inventory control systems RFOUT GND1 MATCH VCC1 NC VCC2 NC VCC3 GND2 ENABLE 1 2 3 4 5 6 7 8 9 10 RF106 20 19 18 17 16 15 14 13 12 11 GND9 GND8 GND7 GND6 NC NC GND5 GND4 GND3 RFIN Figure 1. RF106 Pin Signals - 20 Pin TSSOP RFIN A1 A2 A3 RFOUT ENABLE Bias Figure 2. RF106 Block Diagram Data Sheet 2/1/99 Order No. W118 RF106 900 MHz Power Amplifier Technical Description The RF106 is a three stage, class AB RF power amplifier for the 902-928 MHz ISM band. A class AB power amplifier allows a wide range of output powers without excessive idle power dissipation. Figure 3 shows a typical application circuit for the RF106. A bypassing capacitor of 33pF and a decoupling capacitor of 1nF for low frequency noise are recommended. Due to layout variations the value of the capacitor may vary. General Grounding Requirements All ground pins should have minimum trace inductance to ground. If a ground plane cannot be provided right at the pins, the vias to ground plane should be placed as close to the pins as possible. There should be one via for each ground pin, unless otherwise specified. If the ground plane is at the bottom layer, two vias per pin in parallel may be required. It is important to provide pins 13 and 14 with separate low-impedance connections to GND, isolated from other top-layer grounds. NC pins are not used and should be connected to ac ground, Vcc or ground, as shown in Figure 3. Recommendations on Layout and Implementation Matching An input matching network and an output matching network are needed for maximum power transfer. For greatest efficiency, it is recommended that the input matching network be determined before the output matching network. Matching network values are layoutsensitive. If the RF106 is used with Conexant's RF105 transceiver, the input matching network is not required if the connecting traces are short. Bypassing All VCC pins should have proper bypassing. These decoupling capacitors should be placed very close to the pins, preferably right at the Vcc pins. ESD Sensitivity The RF106 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper Electrostatic Discharge (ESD) precautions. Vcc 1nF Rx section Matching network* 33pF LPF 470 33pF 10k 33pF 22nH 90 phase shifter Output matching network* 1 2 3 4 20 19 18 17 16 Vcc 1.5nH 10 1nF 33pF 5 Vcc 10 1nF Vcc 10 1nF ENABLE 10 33pF 9 33pF 7 8 RF106 6 15 14 13 12 11 33pF Input matching network* RFIN * Matching network values are layout-dependent. Figure 3. RF106 Typical Application Circuit 2 Conexant W118 2/1/98 RF106 900 MHz Power Amplifier Interface Description Table 1 describes the pin signals for the RF106. Table 1. Pin Signal Description Pin No. Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 RFOUT GND1 Description Power amplifier output Connect to power supply through an inductor; matching network required before connecting to antenna. Ground MATCH Interstage matching Connect to ground through a 1.5 nH (typical) inductor. VCC1 NC VCC2 NC VCC3 GND2 Power supply Not used Connect to ac ground, Vcc or ground (Figure 3). Power supply Internally connected to middle stage matching network. Not used Connect to ac ground, Vcc or ground (Figure 3). Power supply Ground ENABLE Chip enable (active high) RFIN GND3 GND4 GND5 NC NC GND6 GND7 GND8 GND9 Power amplifier input Ground Ground Ground Not used Connect to ac ground, Vcc or ground (Figure 3). Not used Connect to ac ground, Vcc or ground (Figure 3). Ground Ground Ground Ground W118 2/1/99 Conexant 3 RF106 900 MHz Power Amplifier Specifications Table 2 lists the absolute maximum ratings for the RF106. Table 3 gives the electrical specifications for the RF106. Table 2. Absolute Maximum Ratings Parameter Supply voltage (Vcc) Input voltage range (note 1) Min. Max. +5 Unit V V mW C C (note 1) GND VCC 400 Power dissipation @ high output power mode Ambient operating temperature Storage temperature Notes: 1. Voltages are referenced to GND. -10 -40 +70 +125 Table 3. RF106 Electrical Specifications (note 1) Parameter Gain variation vs. frequency (902-928 MHz) Peak-Envelope output Power (PEP) (note 2) RF gain Total supply current: Output PEP = 21 dBm Output PEP = 11 dBm Output PEP = 1 dBm Standby (note 5) 18 26 Min. Typ. 0.15 21 29 95 (note 2) 40 (note 3) 30 (note 4) <1 -21 Max. 0.75 22 30 Units dB dBm dB mA mA mA A IM3: PEP 21 dBm Output VSWR for unconditional stability RF input return loss (902-928 MHz) RF output-to-input isolation @ 915 MHz RF input impedance RFOUT passband 3dB BW around 915 MHz VIH for ENABLE VIL for ENABLE IIH for ENABLE IIL for ENABLE Power supply for specified performance Power supply range Operating temperature range Notes: 1. 2. 3. 4. 5. Test conditions: TA = 25 C, VCC = 3.3V, fREF = 915 MHz With continuous wave RF input signal of -8 dBm. With continuous wave RF input signal of -18 dBm. With continuous wave RF input signal of -28 dBm. When ENABLE (pin 10) is low. -10 3.0 2.7 -10 250 1.9 -17 10:1 -9.5 dBc dB dB MHz V 50 50 0.8 50 -1 3.6 3.6 25 60 0 5.0 5.0 70 V A A V V C 4 Conexant W118 2/1/98 RF106 900 MHz Power Amplifier Device Dimensions Package dimensions for the RF106 are given in Figure 4. See detail A D E E1 E1 PIN 1 REF e b SIDE VIEW TOP VIEW Millimeters Dim. A A1 A2 D E E1 L L1 e b c Coplanarity c Min. 0.05 6.45 6.30 4.30 0.50 Max. 0.10 6.55 6.50 4.50 0.75 1.20 MAX 0.90 NOM Inches* Min. Max. 0.0473 MAX 0.0020 0.0039 0.0354 NOM 0.2540 0.2580 0.2481 0.2560 0.1694 0.1772 0.0197 0.0295 0.0394 REF 0.0256 BSC 0.0067 0.0106 0.0051 0.0079 0.003 MAX 1.00 REF 0.65 BSC 0.17 0.13 0.27 0.20 A A2 0.08 MAX Ref: 20-PIN TSSOP (GP00-D296) *Metric values (millimeters) should be used for PCB layout. English values (inches) are converted from metric values and may contain round-off errors. A1 DETAIL A L L1 Figure 4. Package Dimensions - 20-pin TSSOP Information provided by Conexant Systems, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Conexant for its use, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Conexant other than for circuitry embodied in Conexant products. Conexant reserves the right to change circuitry at any time without notice. This document is subject to change without notice. Conexant, "What's Next in Communications Technologies" and diSSTance are trademarks of Conexant Systems, Inc. Product names or services listed in this publication are for identification purposes only, and may be trademarks or registered trademarks of their respective companies. All other marks mentioned herein are the property of their respective holders. (c)1999, Conexant Systems, Inc. Printed in U.S.A. All Rights Reserved W118 2/1/99 Conexant 5 Further Information: literature@conexant.com 1-800-854-8099 (North America) 33-14-906-3980 (International) Web Site www.conexant.com World Headquarters Conexant Systems, Inc. 4311 Jamboree Road, P.O. Box C Newport Beach, CA 92658-8902 Phone: (949) 483-4600 Fax: (949) 483-6375 U.S. Florida/South America Phone: (813) 799-8406 Fax: (813) 799-8306 U.S. Los Angeles Phone: (805) 376-0559 Fax: (805) 376-8180 U.S. Mid-Atlantic Phone: (215) 244-6784 Fax: (215) 244-9292 U.S. North Central Phone: (630) 773-3454 Fax: (630) 773-3907 U.S. Northeast Phone: (978) 692-7660 Fax: (978) 692-8185 U.S. Northwest/Pacific West Phone: (408) 249-9696 Fax: (408) 249-7113 U.S. South Central Phone: (972) 733-0723 Fax: (972) 407-0639 U.S. Southeast Phone: (770) 246-8283 Fax: (770) 246-0018 U.S. Southwest Phone: (949) 222-9119 Fax: (949) 222-0620 APAC Headquarters Conexant Systems Singapore, Pte. Ltd. 1 Kim Seng Promenade Great World City #09-01 East Tower Singapore 237994 Phone: (65) 737 7355 Fax: (65) 737 9077 Australia Phone: (61 2) 9869 4088 Fax: (61 2) 9869 4077 China Phone: (86 2) 6361 2515 Fax: (86 2) 6361 2516 Hong Kong Phone: (852) 2 827 0181 Fax: (852) 2 827 6488 India Phone: (91 11) 692 4780 Fax: (91 11) 692 4712 Korea Phone: (82 2) 565 2880 Fax: (82 2) 565 1440 Europe Headquarters Conexant Systems France Les Taissounieres B1 1680 Route des Dolines BP 283 06905 Sophia Antipolis Cedex France Phone: (33 4) 93 00 33 35 Fax: (33 4) 93 00 33 03 Europe Central Phone: (49 89) 829 1320 Fax: (49 89) 834 2734 Europe Mediterranean Phone: (39 02) 9317 9911 Fax (39 02) 9317 9913 Europe North Phone: (44 1344) 486 444 Fax: (44 1344) 486 555 Europe South Phone: (33 1) 41 44 36 50 Fax: (33 1) 41 44 36 90 Middle East Headquarters Conexant Systems Commercial (Israel) Ltd. P.O. Box 12660 Herzlia 46733 Israel Phone: (972 9) 952 4064 Fax: (972 9) 951 3924 Japan Headquarters Conexant Systems Japan Co., Ltd. Shimomoto Building 1-46-3 Hatsudai, Shibuya-ku Tokyo, 151-0061 Japan Phone: (81 3) 5371 1567 Fax: (81 3) 5371 1501 Taiwan Headquarters Conexant Systems, Taiwan Co., Ltd. Room 2808 International Trade Building Keelung Road, Section 1 Taipei 110 Taiwan, ROC Phone: (886 2) 2720 0282 Fax: (886 2) 2757 6760 |
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