RF2318 Preliminary 3 LINEAR BROADBAND AMPLIFIER Typical Applications • CATV Amplifiers • Return Channel Amplifier • Cable Modems • Base Stations • Broadband Gain Blocks 3 The RF2318 is a broadband general purpose, low cost high linearity RF amplifier IC. The device is manufactured on an advanced Gallium Arsenide Heterojunction Bipolar Transistor (HBT) process, and has been designed for use as an easily cascadable 75Ω gain block. The gain flatness of better than 1.0dB from 5MHz to 1000MHz, and the high linearity, make this part ideal for cable TV applications. Other applications include IF and RF amplification in wireless voice and data communication products operating in frequency bands up to 5000MHz. The device is self-contained with 75Ω input and output impedances, and requires only two external DC biasing elements to operate as specified. Si Bi-CMOS ü GaAs HBT GaAs MESFET SiGe HBT Si CMOS .004 MIN .156 .152 .017 1 .195 .191 .050 .240 .232 .056 .052 5° .022 .018 Optimum Technology Matching® Applied Si BJT LINEAR CATV AMPLIFIERS Product Description .008 Package Style: SOP-8 Features • DC to over 5000MHz Operation • Internally Matched Input and Output • 8dB Small Signal Gain • 6dB Noise Figure • +18dBm Output Power RF IN 1 8 RF OUT GND 2 7 GND GND 3 6 GND GND 4 5 GND Functional Block Diagram Rev A2 010228 • Single 9V to 12V Positive Power Supply Ordering Information RF2318 Linear Broadband Amplifier RF2318 PCBA-L Fully Assembled Evaluation Board (DC to 3GHz) RF2318 PCBA-H Fully Assembled Evaluation Board (3GHz to 6GHz) RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com 3-21 RF2318 Preliminary Absolute Maximum Ratings Parameter Device Current Input RF Power Output Load VSWR Ambient Operating Temperature Storage Temperature LINEAR CATV AMPLIFIERS 3 Parameter Min. Rating Unit 70 +13 20:1 -40 to +85 -40 to +150 mA dBm °C °C Specification Typ. Max. Caution! ESD sensitive device. 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 20 dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm dB dB T=27°C, VCC =9V, Icc=60mA, RC =30Ω 1dB Bandwidth From 10MHz to 1000MHz From 1000MHz to 2000MHz From 2000MHz to 5000MHz From 50MHz to 300MHz, -30°C to +70°C From 300MHz to 1000MHz, -30°C to +70°C From 10MHz to 1800MHz From 1800MHz to 5000MHz Appropriate values for the DC blocking capacitors and bias inductor are required to maintain these VSWRs at the intended operating frequency range. From 10MHz to 1800MHz From 1800MHz to 4000MHz From 4000MHz to 5000MHz Appropriate values for the DC blocking capacitors and bias inductor are required to maintain these VSWRs at the intended operating frequency range. Tones at 500MHz and 900MHz At 100MHz At 500MHz At 900MHz At 100MHz At 500MHz At 900MHz At 100MHz At 500MHz At 900MHz From 30MHz to 4000MHz From 4000MHz to 5000MHz 65 V V mA On pin 8, ICC =63mA On pin 8, ICC =49mA VD =7.0V Overall (50Ω) Frequency Range Gain 8 8 10 Noise Figure Input VSWR Output VSWR Output IP2 Output IP3 Output P1dB Saturated Output Power Saturated Output Power Saturated Output Power Reverse Isolation DC to 5000 8 9 11 6 6 1.6:1 2.0:1 9 10 12 MHz dB dB dB dB dB 1.9:1 1.4:1 3.0:1 1.9:1 3.0:1 +50 +30 +33 +30 Condition +35 +33 TBD TBD TBD TBD 18 TBD 15 Power Supply Device Voltage (VD) Operating Current Range 3-22 7.0 6.5 63 Rev A2 010228 RF2318 Parameter Specification Min. Typ. Max. Unit Overall (75Ω) Frequency Range Gain Noise Figure Input VSWR DC to 5000 8 6 1.3:1 1.4:1 1.6:1 Output VSWR MHz dB dB 2.0:1 2.6:1 Output IP2 Output IP3 +36 Output P1dB Saturated Output Power Reverse Isolation +54 TBD +37 TBD TBD 18 18 TBD 19 18.5 15 20 CSO CTB Cross Modulation Rev A2 010228 TBD TBD TBD TBD TBD TBD dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm dB dB dB dB dB dB dB dB Condition T=25°C , VCC =9V, Icc=63mA, RC =30Ω, 75Ω System 1dB Bandwidth From 30MHz to 2000MHz, -30°C to +70°C From 30MHz to 2000 MHz, -30°C to +70°C From 2000MHz to 4000MHz From 4000MHz to 5000MHz Appropriate values for the DC blocking capacitors and bias inductor are required to maintain these VSWRs at the intended operating frequency range. From 30MHz to 1000MHz, -30°C to +70°C From 1000MHz to 5000MHz Appropriate values for the DC blocking capacitors and bias inductor are required to maintain these VSWRs at the intended operating frequency range. Tones at 500MHz and 900MHz At 100MHz At 500MHz At 900MHz At 100MHz At 500MHz At 900MHz At 100MHz At 500MHz At 900MHz From 30MHz to 4000MHz From 4000MHz to 5000MHz 77 Channels, 36dBmV output/channel 110 Channels, 36dBmV output/channel 77 Channels, 36dBmV output/channel 110 Channels, 36dBmV output/channel 77 Channels, 36dBmV output/channel 110 Channels, 36dBmV output/channel 3-23 3 LINEAR CATV AMPLIFIERS Preliminary RF2318 Pin 1 Function RF IN 2 GND 3 4 5 6 7 8 GND GND GND GND GND RF OUT LINEAR CATV AMPLIFIERS 3 Preliminary Description Interface Schematic RF input pin. This pin is NOT internally DC blocked. A DC blocking capacitor, suitable for the frequency of operation, should be used in all applications. The device has internal feedback, and not using a DC blocking capacitor will disable the temperature compensation.The bias of the device can be controlled by this pin. Adding an optional 1kΩ resistor to ground on this pin reduces the bias level, which may be compensated for by a higher supply voltage to maintain the appropriate bias level. The net effect of this is an increased output power capability, as well as higher linearity for signals with high crest factors. DC coupling of the input is not allowed, because this will override the internal feedback loop and cause temperature instability. Ground connection. Keep traces physically short and connect immediately to ground plane for best performance. Each ground pin should have a via to the ground plane. Same as pin 2. Same as pin 2. Same as pin 2. Same as pin 2. Same as pin 2. RF output and bias pin. Because DC is present on this pin, a DC blocking capacitor, suitable for the frequency of operation, should be used in most applications. For biasing, an RF choke in series with a resistor is needed. The value for the resistor RC is 30Ω (0.5W) for VCC =9V and 82Ω for VCC =12V. The DC voltage on this pin is typically 7V with a current of 63mA. In lower power applications the value of RC can be increased to lower the current and VD on this pin. RF OUT RF IN Application Schematic VCC= 9 - 12 V RC= 30 - 82 Ω 3.3 µH 220 pF RF IN Optional: RS=1 - 2 kΩ Note 1 220 pF 1 8 2 7 3 6 4 5 RF OUT Note 1: Optional resistor Rs can be used to maintain the correct bias level at higher supply voltages. This is useful to increase output capability or linearity for signals with high crest factors. 3-24 Rev A2 010228 RF2318 Preliminary Evaluation Board Schematic - DC to 3GHz (Download Bill of Materials from www.rfmd.com.) VCC P1 P1-1 1 VCC 2 GND 3 GND C3 1 uF 3 C4 10 nF R10 120 Ω 50 Ω µ strip J1 RF IN R9 120 Ω R8 120 Ω R7 120 Ω L1 3.3 uH C1 1 nF 1 8 2 7 3 6 4 5 C2 1 nF 50 Ω µ strip J2 RF OUT 2318400- Evaluation Board Schematic - 3GHz to 6GHz VCC P1 P1-1 1 VCC 2 GND 3 GND C3 1 uF C4 10 nF CON3 R10 120 Ω J1 RF IN 50 Ω µ strip R9 120 Ω R8 120 Ω L1 22 nH C1 8 pF 1 8 2 7 3 6 4 5 R7 120 Ω C2 8 pF 50 Ω µ strip J2 RF OUT 2318401- Rev A2 010228 3-25 LINEAR CATV AMPLIFIERS CON3 RF2318 Preliminary Evaluation Board Layout - DC to 3GHz Board Size 1.233” x 1.145” Board Thickness 0.031”, Board Material FR-4 LINEAR CATV AMPLIFIERS 3 Evaluation Board Layout - 3GHz to 6GHz 3-26 Rev A2 010228