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| RF2381 PCS/Cellular TDMA/CDMA/ W-CDMA Linear Variable Gain Amplifier RF2381 PCS/CELLULAR TDMA/CDMA/W-CDMA LINEAR VARIABLE GAIN AMPLIFIER RoHS Compliant & Pb-Free Product Package Style: SOT23-6 Features 50dB Linear Gain Control Range 22dB Maximum Gain Single 2.7V to 3.3V Supply 35mA Supply Current High Linearity RF OUT GND GC 1 2 3 ATT ATT 6 5 4 VCC GND RF IN Applications CDMA PCS/Cellular Handsets TDMA PCS/Cellular Handsets W-CDMA Handsets Functional Block Diagram Product Description The RF2381 is a linear variable gain amplifier suitable for use in TDMA and CDMA systems in the cellular or PCS band and for W-CDMA systems. The features of this device include linear gain control, high gain, and high linearity. The IC is manufactured on an advanced Gallium Arsenide Heterojunction Bipolar Transistor (GaAs HBT) process and is featured in an industry-standard miniature 6-lead plastic SOT package. Ordering Information RF2381 RF2381PCBA-41X PCS/Cellular TDMA/CDMA/W-CDMA Linear Variable Gain Amplifier Fully Assembled Evaluation Board Optimum Technology Matching(R) Applied GaAs HBT GaAs MESFET InGaP HBT SiGe BiCMOS Si BiCMOS SiGe HBT GaAs pHEMT Si CMOS Si BJT GaN HEMT RF MICRO DEVICES(R), RFMD(R), Optimum Technology Matching(R), Enabling Wireless ConnectivityTM, PowerStar(R), POLARISTM TOTAL RADIOTM and UltimateBlueTM are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. (c)2006, RF Micro Devices, Inc. Rev A2 DS060907 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 1 of 10 RF2381 Absolute Maximum Ratings Parameter Supply Voltage DC Current Operating Ambient Temperature Storage Temperature Rating 0 to +5.0 100 -30 to +85 -40 to +150 Unit VDC mA C C Caution! ESD sensitive device. Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. RoHS status based on EUDirective2002/95/EC (at time of this document revision). The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. Parameter Overall Usable Frequency Range Linear Gain Control Range Gain Control Slope Input VSWR Output VSWR Output IP3 Noise Figure Min. Specification Typ. 800 to 2100 Max. Unit MHz dB dB/V Condition VCC =2.8V, VGC =2.0V, T=25C 50 70 1.5:1 1.5:1 +23 +26 9 1880 18 20 +8 -9 -33 -61 -8 -32 -52 22 2.5:1 2.5:1 Over entire gain control range Over entire gain control range dBm dB MHz dB dBm dBm dBc dBc TDMA modulation; ACP<-32dBc TDMA modulation; for any VGC that gives POUT <+8dBm, ACP<-32dBc, ALT<-52dBc TDMA modulation; POUT <+8dBm and PIN <-11dBm, at all VGC. TDMA modulation; POUT <+8dBm and PIN <-11dBm, at all VGC. VCC =2.8V, VGC =2.0V, T=25C Maximum gain VCC =2.8V, VGC =2.0V, T=25C TDMA Operating Frequency Maximum Small Signal Gain Maximum Average Output Power Maximum Average Input Power Adjacent Channel Power CDMA Operating Frequency Maximum Small Signal Gain Maximum Average Output Power Maximum Average Input Power Adjacent Channel Power 18 1880 20 +6 -13 -53 22 MHz dB dBm dBm dBc CDMA modulation; VCC =3.0V, maximum gain setting, ACP<-52dBc. CDMA modulation; for any VGC that gives POUT <+6dBm, ACP<-52dBc CDMA modulation; VCC =3.0V. POUT <+6dBm and PIN <-13dBm, at all VGC. VCC =2.8V, VGC =2.0V, T=25C W-CDMA Operating Frequency Small Signal Gain Maximum Linear Output Power Adjacent Channel Power 17.5 1920 to 1980 19.5 +5 -46 -43 22 MHz dB dBm dBc dBc W-CDMA ACP<-46dBc W-CDMA modulation; POUT <+5dBm and PIN <-12dBm W-CDMA modulation; Over entire gain control range, PIN <-17dBm 2 of 10 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Rev A2 DS060907 RF2381 -43 dBc W-CDMA modulation; VGC =1.0V, PIN <-14dBm Rev A2 DS060907 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 3 of 10 RF2381 Parameter Power Supply Supply Voltage Gain Control Voltage (VGC) Supply Current 2.8 2.7 to 3.3 0 to 2.2 35 50 21 VGC Current -2.0 +2.4 V V V mA mA mA mA VCC =2.8V, VGC =2.2V VCC =3.3V, VGC =2.2V VCC =2.8V, VGC =0.4V VGC =0.4V to 2.2V Min. Specification Typ. Max. Unit T=25C Specifications Operating range Condition 4 of 10 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Rev A2 DS060907 RF2381 Pin 1 2 3 4 5 6 Function RF OUT GND GC RF IN GND VCC Description RF output pin. This pin is DC-coupled and requires VCC through a bias inductor sized accordingly to provide a high pass transformation with a series capacitor. Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. Analog gain control pin. This pin controls the gain of the IC. Minimum gain occurs at VGC <0.4V and maximum gain is achieved with VGC =2.0V. 50dB of linear gain control with little variation of input P1dB is available. RF input pin. This pin is DC-coupled. Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. Power supply. This pin should be connected to a regulated supply and requires a series inductor and bypass capacitor. Voltage is supplied through this pin to the first stage collector; this voltage also controls the bias. Gain may be tuned by adjusting the value of the feed inductor. Interface Schematic Package Drawing Rev A2 DS060907 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 5 of 10 RF2381 Application Schematic 1850MHz to 1910MHz 33 nF 4 5 2.7 nH VCC 33 nF 33 pF Note orientation of package in this schematic. 6 1 2.7 nH* VCC *For W-CDMA, use 2.2 nH ATT ATT 3 2 1 pF RF OUT GC 100 pF RF IN Evaluation Board Schematic P1 P1-1 1 2 P1-3 P1-4 3 4 5 C1 100 pF 4 L2 2.7 nH VCC C3 33 nF C2 33 pF 2381401- GC GND VCC GND C4 33 nF 3 ATT ATT 2 1 Note orientation of package in this schematic. L3 2.7 nH C5 33 pF C6 33 nF C7 1 F C8 1 pF GC J1 RF IN 50 strip 5 6 50 strip J2 RF OUT VCC 6 of 10 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Rev A2 DS060907 RF2381 Evaluation Board Layout Board Size 2.0" x 2.0" Board Thickness 0.028", Board Material FR-4, Multi-Layer Rev A2 DS060907 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 7 of 10 RF2381 TDMA ACP versus POUT over Temperature, -25 +25C -30C -27 +85C -45 Note: Below POUT=-35 dBm, test equipment noise floor inhibits accurate AltCP measurement PIN=-9 dBm, f=1880 MHz, VCC=2.8 V -40 TDMA AltCP versus POUT over Temperature, PIN=-9 dBm, f=1880 MHz, VCC=2.8 V +25C -30C +85C -29 -50 -31 AltCP (dBc) -50 -40 -30 -20 -10 0 10 20 ACP (dBc) -55 -33 -60 -35 -65 -37 -70 -50 -40 -30 -20 -10 0 10 20 POUT (dBm) POUT (dBm) 45.00 40.00 35.00 30.00 Supply Current versus Gain-Control Voltage over Temperature, PIN=-9 dBm, F=1880 MHz, VCC=2.8 V Icc,mA, +25C Icc,mA, -30C Icc,mA, +85C Gain versus Gain-Control Voltage over Temperature, 30.00 +25C 20.00 -30C +85C PIN=-9 dBm, F-1880 MHz, VCC=2.8 V 10.00 0.00 ICC (mA) 25.00 20.00 15.00 10.00 5.00 0.00 0.00 Gain (dB) -10.00 -20.00 -30.00 -40.00 0.50 1.00 1.50 2.00 2.50 -50.00 0.00 0.50 1.00 1.50 2.00 2.50 VGC (V) VGC (V) -35 W-CDMA ACPR versus VGC at Various Output Powers Pout=+2dBm Note: Below VGC=~1.1V, test equipment noise floor inhibits accurate ACP measurement Pout=+3dBm Pout=+4dBm Pout=+6dBm Pout=+8dBm 60.0 NF versus VGC (RF Freq. 1950MHz, VCC=2.8V, VGC=2.0 to 0.2V) -40 50.0 NF [dB] 40.0 ACPR (dBc) -45 NF (dB) -50 -55 -60 0.8 1 1.2 1.4 1.6 1.8 2 30.0 20.0 10.0 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 VGC (V) VGC (V) 8 of 10 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Rev A2 DS060907 RF2381 18.0 Output Power versus Input Power (RF Freq. 1950MHz, VCC=2.8V, VGC=2.0V) 16.0 Pout [dBm] 14.0 Output Power (dBm) 12.0 10.0 8.0 6.0 4.0 -14.0 -12.0 -10.0 -8.0 -6.0 -4.0 -2.0 0.0 2.0 4.0 6.0 Input Power (dBm) Rev A2 DS060907 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 9 of 10 RF2381 10 of 10 7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Rev A2 DS060907 |
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