RF2302 4 BROADBAND LINEAR VARIABLE GAIN AMPLIFIER Typical Applications • CDMA Cellular/PCS and JCDMA Systems • Wireless Local Loop Systems • TDMA Cellular/PCS Systems • Wideband CDMA Systems • GSM Systems • PDC Systems (950MHz and 1450MHz) Product Description 0.012 ü GaAs MESFET SiGe HBT Si CMOS VCC 2 S ee GND 3 U pg r RF IN 1 ad ed P Si Bi-CMOS GaAs HBT GND 4 8 PD 7 RF OUT 6 R F2 37 0.118 + 0.004 sq. 6° MAX 0° MIN 0.021 + 0.004 0.006 + 0.002 0.034 NOTES: 1. Shaded lead is pin 1. 2. All dimensions are exclusive of flash, protrusions or burrs. 3. Lead coplanarity: 0.002 with respect to datum "A". Package Style: MSOP-8 Features • 25dB Linear Gain Control range • +14dBm OP1dB at 3.5V (836MHz) • Single 3V to 6V Supply • 14dB Max Gain at 836MHz • 10dB Max Gain at 1900MHz • 4dB Noise Figure at 836MHz 6 GND 5 GC Functional Block Diagram Rev A8 010410 A 0.0256 Optimum Technology Matching® Applied Si BJT 0.006 + 0.003 0.192 + 0.008 ro du ct The RF2302 is a broadband linear variable gain amplifier that was designed specifically for digital communications systems that require linear amplification over a wide gain control range. It is suitable for use in CDMA or TDMA systems in the cellular or PCS band, in DAMPS systems, and in PDC systems. Operating supply voltage ranges from 3V to 6V. The device operates over a large frequency band, from 100MHz to 2000MHz, and is tuned to a specific frequency band with an output bias feed inductor and blocking capacitor. Bias optimization may be achieved by adjusting the voltage to pin 8 (PD). The IC is manufactured on an advanced Gallium Arsenide Heterojunction Bipolar Transistor (GaAs HBT) process and is featured in a new standard miniature 8-lead plastic MSOP package. GENERAL PURPOSE AMPLIFIERS 4 Ordering Information RF2302 Broadband Linear Variable Gain Amplifier RF2302 PCBA-L Fully Assembled Evaluation Board 836MHz RF2302 PCBA-H Fully Assembled Evaluation Board 1.88GHz RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com 4-43 RF2302 Absolute Maximum Ratings Parameter Rating Unit Supply Voltage Power Down Voltage Gain Control Voltage 0 to +8.0 0 to +3.1 0 to +3.1 VDC VDC VDC 100 12:1 -40 to +85 -40 to +150 mA DC Current Output Load VSWR Operating Ambient Temperature Storage Temperature Parameter Specification Min. Typ. Max. RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. However, RF Micro Devices reserves the right to make changes to its products without notice. RF Micro Devices does not assume responsibility for the use of the described product(s). Unit Linear Gain Control Range Gain Control Slope Input IP3 32 1 +11 +10 -1 +1 Input VSWR Output VSWR TDMA ACPR -33 -34 -63 -73 CDMA ACPR -50 -55 -55 U pg r ALT1 Supply Voltage Power Down Voltage High Power Down Voltage Low DC Current Consumption VPD Current VGC Current Power Down Current Turn On/Off Time 4-44 3:1 6 dBc dBc dBc dBc 836MHz, VGC =2.2V 1880MHz, VGC =2.2V 836MHz, VGC =2.2V 1880MHz, VGC =2.2V -52 -59 -57 dBc dBc dBc 836MHz, VGC =2.2V 1880MHz, VGC =2.2V 836MHz, VGC =2.2V T=25°C 3 2.7 40 Freq=836MHz, VGC =2.2V Freq=1880MHz, VGC =2.2V Freq=836MHz, VGC =1.4V Freq=1880MHz, VGC =1.4V Freq=836MHz, VGC =2.2V Freq=1880MHz, VGC =2.2V VGC =1.4V to 2.2V Slope=∆Output peak voltage/∆VGC Freq=836 MHz, VGC =2.2V Freq=1880 MHz, VGC =2.2V Freq=836MHz, VGC =1.4V Freq=1880MHz, VGC =1.4V In 50Ω system In 50Ω system -34 -35 -68 -75 ad ed ALT1 3 +12.5 +11 +1 +3 1.8:1 2.5:1 MHz dB dB dB dB dB dB dB V/V dBm dBm dBm dBm R F2 37 Noise Figure 14 11 -20 -29 4 7 34 2000 15 12 -19 -27 ro du ct 100 13 9 -22 -30 P Small Signal Minimum Gain Power Supply Condition VCC =3.0V, VPD =2.8V, VGC =2.2V, T=25°C Overall RF Frequency Range Small Signal Maximum Gain S ee GENERAL PURPOSE AMPLIFIERS 4 °C °C Caution! ESD sensitive device. 50 7 16 6 2.9 1.0 55 9 18 10 100 V V mA mA µA µA nS VCC =3.0V, VPD =2.8V, VGC =1.4V to 2.2V VPD =2.8V, VGC =2.2V, VCC =3.0V VPD =2.8V, VGC =2.2V, VCC =3.0V VPD <1V, VGC <1V Rev A8 010410 RF2302 Function RF IN VCC 3 GND 4 GND 5 GC GND RF OUT 8 PD Interface Schematic RF input pin. This pin is DC coupled and requires a blocking capacitor. Power supply. This pin is connected to a battery or a regulated supply and requires a bypass capacitor as close to the pin as possible. Ground connection. Keep traces physically short and connect immediately to ground plane for best performance. Ground connection. Keep traces physically short and connect immediately to ground plane for best performance. Use a separate ground via for this pin. Analog gain control pin. This pin controls the gain of the IC. Minimum gain occurs at VGC <1V and maximum gain is achieved with VGC =2.2V. 25dB of linear gain control with no variation of input P1dB is available, and additional attenuation is possible with VGC <1V with input P1dB variation. Bypass this pin near the device. Same as pin 3. 4 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. This LC transformation sets the output load line for the amplifier. If this amplifier is driving a power amplifier or antenna, no additional matching is required. However, to improve the output match, a parallel resistor can be added across the inductor. For 836MHz applications use a 10nH bias inductor (optional resistor R3=100 ohms) and 2.7pF coupling capacitor. For 1900MHz applications use a 2.7nH bias inductor (optional resistor R3=150ohms) and 1.0pF coupling capacitor. Power down pin. This pin provides bias for the amplifier. To turn the amplifier on, this pin should be at 2.8V. Reducing this voltage below 0.5V ensures that the amplifier will draw less than 10µA current from the supply. Additionally, bias current can be optimized for lower output power by adjusting this voltage over a 2.7V to 2.9V range from a regulated supply. ro du ct R F2 37 6 6 7 Description GENERAL PURPOSE AMPLIFIERS Pin 1 2 Evaluation Board Schematic - 836MHz or 1900MHz (Download Bill of Materials from www.rfmd.com.) P1-3 GC 2 GND 3 VCC P1-1 P1-3 S ee GND 3 VCC VCC R3 C3 1 nF L1 2302400-, 401- C12 1 µF C1 22 pF 1 8 2 7 3 6 4 5 PD C4 C9 15 pF C6 (pF) R3 (Ω) L1 (nH) C4 (pF) L (836 MHz) 12 100 10 2.7 H (1900 MHz) 3.3 150 2.7 1 RF OUT J2 GC C11 1nF Board Rev A8 010410 PD 2 50 Ω µstrip VCC C13 1 µF 1 C6 50 Ω µstrip U pg r RF IN J1 1 ad ed P1-1 P2 P P1 C14 1 µF 4-45 RF2302 Evaluation Board Layout 836MHz Board Size 2.0” x 2.0” GENERAL PURPOSE AMPLIFIERS 4 S ee U pg r ad ed P ro du ct R F2 37 6 Evaluation Board Layout 1.88GHz 4-46 Rev A8 010410 Gain @ 3.3, 3.0, 2.7V versus VGC Gain @ 3.3, 3.0, 2.7V versus VGC (Frequency 1880MHz @ -8dBm, IS-95 Mod. VPD=2.8V, VGC=2.2 to 1.4V) (Frequency 836MHz @ -6dBm, IS-95 Mod., VCC=3.0V, VPD=2.8V, VGC=2.2 to 1.4V) 15.0 20.0 10.0 15.0 5.0 10.0 0.0 5.0 Gain (dB) Gain (dB) RF2302 -5.0 -10.0 Gain @ 3.3 V Gain @ 3.0 V Gain @ 2.7 V 0.0 -5.0 -15.0 -10.0 4 -20.0 -15.0 -20.0 Gain @3.0 V -30.0 Gain @ 2.7 v -25.0 -35.0 1.4 1.4 1.6 1.8 2.0 VGC (V) GENERAL PURPOSE AMPLIFIERS Gain @ 3.3 V -25.0 1.6 1.8 2.2 2.0 2.2 VGC (V) IGC versus VGC 6 IGC versus VGC (Frequency 836MHz @ -6dBm, VCC=3.0V, VPD=2.8V) R F2 37 (Frequency 1880MHz @ -8dBm, VCC=3.0V, VPD=2.8V) 25.0 30.0 Igc [UA] @25 C Igc [UA] @ - 40 C 25.0 Igc [UA] @25 C Igc [UA] @ - 40 C Igc [UA] @ 85 C 20.0 Igc [UA] @ 85 C 20.0 IGC (uA) 15.0 ro du ct IGC (uA) 15.0 10.0 10.0 5.0 5.0 0.0 P 0.0 -5.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 ad ed 0.0 2.0 -5.0 0.0 2.2 0.2 0.4 0.6 0.8 1.0 VGC (V) IPD versus VPD (Frequency 1880MHz,VCC=3.0V,VGC=2.2V) 2.2 IPD (mA) 5.0 S ee IPD (mA) 2.0 6.0 Ipd [mA] @ 85 C 5.0 1.8 Ipd [mA] @25 C Ipd [mA] @ - 40 C Ipd [mA] @ 85 C 7.0 Ipd [mA] @ - 40 C 6.0 1.6 8.0 Ipd [mA] @25 C 7.0 1.4 IPD versus VPD (Frequency 836MHz @ -6 dBm, VCC=3.0V, VGC=2.2V) U pg r 8.0 1.2 VGC (V) 4.0 3.0 4.0 3.0 2.0 2.0 1.0 1.0 0.0 0.0 -1.0 -1.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 VPD (V) Rev A8 010410 1.8 2.0 2.2 2.4 2.6 2.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 VPD (V) 4-47 RF2302 Gain versus VGC Gain versus VGC (Frequency 1880MHz @ -8dBm, IS-95 Mod., VCC=3.0V, VPD=2.8V (Frequency 836MHz @ -6dBm, IS-95 Mod., VCC=3.0V, VPD=2.8V, VGC=2.2 to 1.0V) 20.0 15.0 Gain @ - 40C Gain @ 25C Gain @ 85C 15.0 Gain @ - 40C Gain @ 25C Gain @ 85C 10.0 5.0 10.0 0.0 Gain (dB) Gain (dB) 5.0 0.0 -5.0 -5.0 -10.0 -15.0 -10.0 -20.0 4 GENERAL PURPOSE AMPLIFIERS -15.0 -25.0 -20.0 -30.0 -25.0 -35.0 1.0 1.2 1.4 1.6 1.8 2.0 2.2 1.0 1.2 1.4 VGC (V) 2.2 R F2 37 (Frequency 1880MHz @ -8dBm, NADC Mod. VCC=3.0V, VPD=2.8V) 15.0 Gain @ - 40C Gain @ 25C Gain @ 85C 10.0 Gain @ 25C 10.0 2.0 Gain versus VGC Gain @ - 40C 15.0 1.8 6 Gain versus VGC (Frequency 836MHz @ -6dBm, NADC. Mod., VCC=3.0V, VPD=2.8V) 20.0 1.6 VGC (V) 5.0 Gain @ 85C 0.0 Gain (dB) 0.0 -5.0 ro du ct Gain (dB) 5.0 -5.0 -10.0 -10.0 -15.0 -20.0 -15.0 -25.0 -30.0 P -20.0 -25.0 1.2 1.4 1.6 1.8 2.0 -35.0 2.2 1.0 ad ed 1.0 1.2 1.4 VGC (V) ACPR versus VGC (Frequency 1880MHz @ -8dBm, IS-95 Mod., VCC=3.0V, VPD=2.8V ACPR @ 25C ACPR @ -40C -10.0 ACPR @ 85C -20.0 ACPR (dBc) -30.0 2.2 0.0 S ee ACPR(dBc) -20.0 2.0 ACPR versus VGC ACPR @ 25C ACPR @ - 40C ACPR @ 85C -10.0 1.8 (Frequency 836MHz @ -6dBm, IS-95 Mod., VCC=3.0V, VPD=2.8V) U pg r 0.0 1.6 VGC (V) -40.0 -30.0 -40.0 -50.0 -50.0 -60.0 -60.0 -70.0 -80.0 -70.0 1.0 1.2 1.4 1.6 VGC (V) 4-48 1.8 2.0 2.2 1.0 1.2 1.4 1.6 1.8 2.0 2.2 Vgc(V) Rev A8 010410 RF2302 -23.0 ACPR versus VGC ACPR. versus VGC (Frequency 1880MHz @ -8dBm.NADC Mod., VCC=3.0v, VPD=2.8v) (Frequency 836MHz @ -6dBm, NADC.Mod., VCC=3.0v, VPD=2.8V, ACPR @25C ACPR @-40C ACPR @85C -25.0 VGC=2.2 to 1.0V) 0.0 ACPR @25C -5.0 ACPR @-40C ACPR @85C -10.0 -29.0 -31.0 -15.0 -20.0 -25.0 -33.0 4 -30.0 -35.0 -35.0 -37.0 1.0 1.2 1.4 1.6 1.8 2.0 -40.0 2.2 1.0 VGC (V) 1.4 1.8 2.0 2.2 Alternate Channel Power versus VGC. (Frequency 1880MHz @ -8dBm, IS-95 Mod., VCC=3.0V, VPD=2.8) R F2 37 6 Alternate Channel Power versus VGC (Frequency 836MHz @ -6dBm, IS-95 Mod., VCC=3.0V, VPD=2.8V, VGC=2.2 to 1.0V) 0.0 ALTR.CH.Power @25C ALTR.CH.Power @-40C ALTR.CH.Power @85C -10.0 ALTR.CH.Power @ 25C ALTR.CH.Power @ -40C ALTR.CH.Power @ 85C -10.0 Alternate Channel Power (dBc) -20.0 -30.0 -20.0 -30.0 ro du ct -40.0 -50.0 -60.0 -70.0 -80.0 -40.0 -50.0 -60.0 -70.0 P -80.0 -90.0 1.2 1.4 1.6 1.8 2.0 ad ed 1.0 -90.0 1.0 2.2 1.2 1.4 VGC (V) Alternate Channel Power versus VGC U pg r -50.0 2.2 ALTR.Ch.Power @25C ALTR.Ch.Power @-40C Alternate Channel Power (dBc) -55.0 S ee -30.0 2.0 (Frequency 1880MHz @-8dBm, NADC Mod., VCC=3.0V, VPD=2.8V) VGC=2.2 to 1.0V) -20.0 1.8 Alternate Channel Power versus VGC ALTR.Ch.Power @25C ALTR.Ch.Power @-40C ALTR.Ch.Power @85C -10.0 1.6 VGC (V) (Frequency 836MHz @ -6dBm, NADC. Mod., VCC=3.0V,VPD=2.8V, 0.0 Alternate Channel Power (dBc) 1.6 VGC (V) 0.0 Alternate Channel Power (dBc) 1.2 -40.0 -50.0 -60.0 -70.0 ALTR.Ch.Power @85C -60.0 -65.0 -70.0 -75.0 -80.0 -90.0 -80.0 1.0 1.2 1.4 1.6 VGC (V) Rev A8 010410 1.8 2.0 2.2 1.0 1.2 1.4 1.6 1.8 2.0 2.2 VGC (V) 4-49 GENERAL PURPOSE AMPLIFIERS ACPR. (dBc) ACPR (dBc) -27.0 U pg r RF2302 4-50 S ee 4 GENERAL PURPOSE AMPLIFIERS ad ed P ro du ct R F2 37 6 Rev A8 010410