Features * * * * * Frequency Range 4.9 GHz to 5.4 GHz Linear POUT Typically 18 dBm Gain Typically 17 dB VCC 3.1 V to 3.5 V Package: QFN 16 Benefits * * * * Biasing Control Extends Battery Life Time AC Input and Output Coupling Saves External Capacitors Output Matching Requires Only One External Inductor Very Suitable for PCMCIA Cards Type 1 (Thickness 3.3 mm) 5-GHz WLAN Power Amplifier for 802.11a Electrostatic sensitive device. Observe precautions for handling. ATR3515 Description Preliminary Process The 5-GHz power amplifier is designed in Atmel's Silicon-Germanium (SiGe) process and provides excellent noise performance as well as good power-added efficiency. Circuitry The PA consists of a 2-stage amplifier with a linear output power of 18 dBm. The output stage was realized using an open-collector structure. The IC features 50-W input matching. Power-up/down and output level are controlled at bias control Pin 6 (Vctl). Figure 1. Block Diagram Vcc1 15 Vcc2 13 ATR3515 RFin 3 RFout 11 Matching Bias control 6 Vctl 16 Vcc_ctl Rev. 4514E-WIRE-02/03 1 Pin Configuration Vcc_ctl Vcc1 GND Vcc2 Figure 2. Pinning QFN 16 16 15 14 13 12 GND 1 2 ATR3515 11 RFout 10 n.c. 3 4 GND on the Paddel 9 GND 5 6 7 8 GND Vctl GND GND GND n.c. RFin GND Pin Description 2 Pin Symbol 1 GND Function Ground 2 n.c. Not connected 3 RFin RF input 4 GND Ground 5 GND Ground 6 Vctl Power-up/biasing control voltage 7 GND Ground 8 GND Ground 9 GND Ground 10 n.c. 11 RFout RF output Not connected 12 GND Ground 13 Vcc2 Supply voltage for PA stage 14 GND Ground 15 Vcc1 Supply voltage for driver stage 16 Vcc_ctl Paddel - Supply voltage for biasing control Ground ATR3515 4514E-WIRE-02/03 ATR3515 Electrical Characteristics VCC = 3.3 V, Tamb = 25C, unless otherwise specified Parameters Test Conditions Frequency range Ambient temperature range Supply voltage Symbol Min. f 4900 Tamb -25 VCC 3.1 Typ. 3.3 Max. Unit 5400 MHz 75 C 3.5 V Linear output power Single tone signal Plin 18 dBm P1dB output power Single tone signal P1dB 23 dBm Control voltage range PA operating mode Vctl 1.9 V 0.2 V 500 600 ns -12 -8 dB at 11 MHz offset from carrier -22 dBr at 20 MHz offset from carrier -30 dBr -42 dBr Power down Turn on/off time ON' is the time that ICC returns to normal and OFF' is the time the current needs to decrease to 10% of normal mode. Input and output return loss Spectrum mask (1) 1.5 Vctl ton/off With external matching at 30 MHz offset from carrier Error Vector Magnitude (1) EVM Reverse isolation ISOr 30 2 % 33 dB for reference Psat 24 dBm Power added efficiency at operation point for 18 dBm output power (2) PAE 12 % Current consumptoin at operation point for 18 dBm output power (3) Icc 160 Within 200 MHz frequency band Gd Output power saturation Gain linear Gain deviation Notes: Gl 200 17 -1,5 mA dB +1.5 dB 1. OFDM signal according to 802.11a spec with Pout = 18 dBm at 54 Mbps. 2. Due to the linearity requirements in an OFDM system, the power amplifier operates in the linear mode of class-A . 3. The current consumption of the PA can be controlled by the Pin Vctl. For lower output power demand, the current can be reduced, while the power gain remains nearly constant. 3 4514E-WIRE-02/03 Figure 3. Application Circuit Vcc_ctl Vcc1 Vcc2 Output * Input ATR3515 * * microstrip line Vctl 4 ATR3515 4514E-WIRE-02/03 ATR3515 Ordering Information Extended Type Number Package Remarks ATR3515-PES QFN 16 Tube, MOQ 750 ATR3515-PEQ QFN 16 Taped and reeled, MOQ 6000 Package Information 5 4514E-WIRE-02/03 Atmel Headquarters Atmel Operations Corporate Headquarters Memory 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL (81) 3-3523-3551 FAX (81) 3-3523-7581 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL (33) 2-40-18-18-18 FAX (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France TEL (33) 4-42-53-60-00 FAX (33) 4-42-53-60-01 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 1150 East Cheyenne Mtn. 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