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| PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information Applications Bluetoothtm Class 1 USB Dongles Laptops Access Points Cordless Piconets Product Description A monolithic, high-efficiency, silicon-germanium power amplifier IC, the PA2423L is designed for class 1 Bluetoothtm 2.4 GHz radio applications. It delivers +22.5 dBm output power with 45% power-added efficiency - making it capable of overcoming insertion losses of up to 2.5 dB between amplifier output and antenna input in tm class 1 Bluetooth applications. The amplifier features: an analog control input for improving PAE at reduced output power levels; a digital control input for controlling power up and power down modes of operation. An on-chip ramping circuit provides the turnon/off switching of amplifier output with less than 3dB overshoot, meeting the Bluetoothtm specification 1.1. The PA2423L operates at 3.3V DC. At typical output power level (+22.5 dBm), its current consumption is 125 mA. The silicon/silicon-germanium structure of the PA2423L - and its exposed-die-pad package, soldered to the system PCB - provide high thermal conductivity and a subsequently low junction temperature. This device is capable of operating at a duty cycle of 100 percent. Features +22.5dBm at 45% Power Added Efficiency Low current 80mA typical @ Pout=+20 dBm Temperature stability better than 1dB Power-control and Power-down modes Single 3.3 V Supply Operation Temperature rating: -40C to +85C Very small plastic package - 6 lead LPCC (1.6mm x 3.0mm) Ordering Information Type PA2423L Package 6 - LPCC Shipping Method Tape and reel Tubes -samples PA2423L-EV Evaluation kit Functional Block Diagram V CTL V CC0 V RAMP Bias Generator Ramp Circuitry IN Stage 1 Interstage Match Stage 2 OUT/ V CC2 GND V CC1 GND DOC# 05PDS002 Rev 4 07/26/2001 Page 1 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information Pin Out Diagram TOP VIEW BOTTOM VIEW 1 2 3 SiGe 2423L 6 5 4 5 4 6 6 1 Die 3 2 Pin Out Description Pin No. 1 2 3 4 5 6 Die Pad Name VCTL VRAMP IN VCCO VCC1 OUT/VCC2 GND Description Controls the output level of the power amplifier. An analog control signal between 0V and Vcc varies the PA output power between minimum and maximum values Enable/Disable the power amplifier. A digital control signal with Vcc logic high (power up) and 0V logic low (power down) is used to turn the device on and off. Power amplifier RF input, external input matching network with DC blocking is required Bias supply voltage Stage 1 collector supply voltage, external inter-stage matching network is required PA Output and Stage2 collector supply voltage, external output matching network with DC blocking is required Heatslug Die Pad is ground DOC# 05PDS002 Rev 4 07/26/2001 Page 2 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information Absolute Maximum Ratings Symbol VCC VCTL VRAMP IN Parameter Supply Voltage Control Voltage Ramping Voltage RF Input Power Operating Temperature Range Storage Temperature Range Maximum Junction Temperature Min. -0.3 -0.3 -0.3 Max. +3.6 Unit V V V dBm C C C VCC VCC +8 TA TSTG Tj -40 -40 +85 +150 +150 Operation in excess of any one of above Absolute Maximum Ratings may result in permanent damage. This device is a high performance RF integrated circuit with ESD rating < 600V and is ESD sensitive. Handling and assembly of this device should be at ESD protected workstations. DC Electrical Characteristics Conditions: VCC0 = VCC1 = VCC2 = VRAMP = 3.3V, VCTL = 3.3V, PIN = +2dBm,TA =25C, f = 2.45GHz, Input and Output externally matched to 50 ,unless otherwise noted. Symbol VCC ICC Icctemp VCTL ICTL VRAMP Istdby Note Supply Voltage 1 3 Parameter Min. 3 Typ. 3.3 125 25 Max. 3.6 150 Unit V mA % Supply Current (ICC = IVCC0 + IVCC1 +I VCC2), VCTL = 3.3V Supply Current variation over temperature from TA = 25C (-40C V A V 1 3 3 1 Current sourced by VCTL Pin Logic High Voltage Logic Low Voltage Leakage Current when Vramp = 0V, Vctl = high 2.0 0.8 0.5 10 V A DOC# 05PDS002 Rev 4 07/26/2001 Page 3 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information AC Electrical Characteristics Conditions: VCC0 = VCC1 = VCC2 = VRAMP =3.3V, VCTL = 3.3V, PIN =+2 dBm, TA =25C, f =2.45 GHz, Input and Output externally matched to 50, unless otherwise noted. Symbol fL-U Pout Ptemp dPOUT /dVCTL PAE GVAR 2f, 3f, 4f, 5f IS21 IOFF IS12I STAB Note 3 1 1 3 3 Frequency Range Parameter Min. 2400 20 Typ. Max. Unit 2500 MHz dBm dBm dB dBm/V % 1.0 -35 dB dBc dB dB Output Power @ PIN =+2 dBm, VCTL = 3.3V Output Power @ PIN =+2 dBm, VCTL =0.4V Output Power variation over temperature (-40C 23.5 0 2 120 45 0.7 -40 15 32 20 42 3 3.4 2 2 2 Gain Variation over band (2400-2500 MHz) Harmonics Isolation in "OFF" State, PIN = +2dBm, VRAMP = 0V Reverse Isolation Stability (PIN = +2dBm, Load VSWR = 6:1) All non-harmonically related outputs less than -50 dBc Notes: (1) Guaranteed by production test at TA =25C. (2) Guaranteed by design only (3) Guaranteed by design and characterization (4) Harmonic levels are greatly affected by topology of external matching networks. Typical Performance Characteristics Test Conditions: SiGe PA2423L-EV: VCC0=VCC1=VCC2=VRAMP=3.3V, VCTL = 3.3V, PIN = +2 dBm, TA = 25C, f = 2.45GHz, Input and Output externally matched to 50, unless otherwise noted. Pout, Icc vs Supply Voltage 24 23 150 142 134 126 118 110 102 94 86 78 70 2.4 2.6 2.8 3 3.2 3.4 3.6 Output Power, Gain vs Input Power Output Power (dBm) 22 21 20 19 18 17 16 15 14 Supply current (mA) 25 30.00 Output Power (dBm) 20 25.00 15 20.00 10 15.00 5 10.00 0 -28 -24 -20 -16 -12 -8 -4 0 4 8 5.00 Vcc(V) Pout Icc Pout Gain Input Power (dBm) DOC# 05PDS002 Rev 4 07/26/2001 Page 4 of 11 Gain (dB) PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information PAE vs Input Power 50 45 Pout vs Frequency Output Power (dBm) 40 35 23. 0 22. 5 22. 0 21. 5 21. 0 20. 5 20. 0 19. 5 19. 0 18. 5 18. 0 2. 2 2. 3 2. 4 2. 5 2. 6 2. 7 PAE (%) 30 25 20 15 10 5 0 -28 -24 -20 -16 -12 -8 -4 0 4 8 Input Power(dBm) Frequency (GHz) DOC# 05PDS002 Rev 4 07/26/2001 Page 5 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information Output Power vs Control Voltage Output Power dBm) Supply Current vs. Control Voltage 140 120 25 20 15 10 5 0 -5 -10 -15 -20 -25 0.4 0.9 1.4 1.9 2.4 2.9 3.4 Supply Current (mA) 100 80 60 40 20 Vctl(V) 0.4 0.9 1.4 1.9 2.4 2.9 3.4 0 Pin=-4dBm Pin=+2dBm Pin=0dBm Vctl(V) Pin=-4dBm Pin=+2dBm Pin=0dBm Icc vs Frequency Harmonic Output Spectrum 140 130 120 110 100 90 80 70 60 2.3 2.3 2.4 2.4 2.5 2.5 2.6 2.6 2.7 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 1 2 3 RFout power (dBm) Supply Current (mA) Frequency (GHz) Frequency (GHz) 4 5 6 7 8 9 10 11 12 13 DOC# 05PDS002 Rev 4 07/26/2001 Page 6 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information PA output spectrum with BT modulated signal 30 20 RF Output Power (dBm) into 50R 10 0 -10 -20 -30 -40 -50 -60 2.4475 2.4485 2.4495 2.4505 2.4515 2.4525 Frequency (GHz) DOC# 05PDS002 Rev 4 07/26/2001 Page 7 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information Package Dimensions The PA2423L is packaged in a 1.6 mm x 3.0 mm 6 lead LPCC package. The underside of the package is an exposed die-pad structure. This allows for direct soldering to the PCB for enhanced thermal conductivity. The package dimensions are shown in the drawing below. DOC# 05PDS002 Rev 4 07/26/2001 Page 8 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information LPCC 6 PCB Footprint Layout Applications Information For test and design purposes, SiGe Semiconductor offers an evaluation board for the PA2423L. The order part number for the evaluation board is PA2423L-EV. The evaluation board is intended to simplify the testing with respect to RF performance of this power amplifier. The application note, 05AN006 provides the supporting information for using the evaluation board. It contains information on the schematic, bill of materials and recommended layout for the power amplifier and the input and output matching networks. To assist in the design process, this layout is available, upon request, in gerber file format. Using VRAMP VRAMP is a digital pin used to power-up and power-down the PA2423L in Time Duplex systems such as Bluetoothtm 1.1. During receive mode, VRAMP voltage is pulled down, PA2423L acts as a 25 dB isolation block between the radio and the antenna while consuming a modest 1uA. In transmit mode, VRAMP voltage is pulled to VCC and PA2423L offers 19 dB to 21dB of large signal gain. The rise and fall time are in the order of 1-2usec. DOC# 05PDS002 Rev 4 07/26/2001 Page 9 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information Using VCTL VCTL is an analog pin that is designed to control the gain of PA2423L. Applying a voltage between 0V and Vcc will adjust the gain between -15dB and 21 dB. Used in combination with a variable drive level to PA2423L, the VCTL function can greatly optimize the PAE of the system at all four Bluetoothtm transmitted power levels. By applying approximately 1.4V to VCTL, for example, a Class1 radio can be modified to a Class2 radio with the PA2423L consuming only 15mA. By implementing a resistor DAC, the VCTL pin can interface with Bluetoothtm transceivers offering digital and programmable outputs. DOC# 05PDS002 Rev 4 07/26/2001 Page 10 of 11 PA2423L 2.4 GHz Bluetooth Class 1 Power Amplifier IC Preliminary Information http://www.sige.com Headquarters: Canada Phone: +1 613 820 9244 Fax: +1 613 820 4933 2680 Queensview Drive Ottawa ON K2B 8J9 Canada sales@sige.com U.S.A. 19925 Stevens Creek Blvd. Suite 135 Cupertino, CA 95014-2358 Phone: +1 408 973 7835 Fax: +1 408 973 7235 United Kingdom 1010 Cambourne Business Park Cambourne Cambridge CB3 6DP Phone: +44 1223 598 444 Fax: +44 1223 598 035 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. The Bluetooth trademarks are owned by Bluetooth SIG Inc., USA. Copyright 2001 SiGe Semiconductor All Rights Reserved DOC# 05PDS002 Rev 4 07/26/2001 Page 11 of 11 |
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