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| HFA3421 TM Data Sheet September 1997 File Number 4288.1 1.7GHz - 2.3GHz Low Noise Amplifier The Intersil HFA3421 PRISM(R) is a high performance low noise amplifier in a low cost SOIC 8 lead surface mount plastic package. The HFA3421 employs a fully monolithic design which eliminates the need for external tuning networks. It can be biased using 3V or 5V supplies and has an option for biasing at higher currents for increased dynamic range. The HFA3421 is ideally suited for use where low noise figure, high gain, high dynamic range and low power consumption are required. Typical applications include receiver front ends in the Wireless Local Loop (WLL) systems, as well as standard gain blocks, buffer amps, driver amps and IF amps in both fixed and portable systems. Features * Low Noise Figure . . . . . . . . . . . . . . . . . . . . . . . . . . 1.65dB * High Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20dB * Low Power Consumption . . . . . . . . . . . . . . 3V to 5V, 8mA * High Dynamic Range * DC Decoupled RF Input and Output * No External RF Tuning Elements Necessary * Low Cost SOIC 8 Lead Plastic Package Applications * Wireless Local Loop * TDD Quadrature-Modulated Communication Systems * Wireless Local Area Networks Ordering Information PART NUMBER HFA3421IB HFA3421IB96 TEMP. RANGE (oC) -40 to 85 -40 to 85 PACKAGE 8 Ld SOIC Tape and Reel PKG. NO. M8.15 * PCMCIA Wireless Transceivers * TDMA Packet Protocol Radio * PCS/Wireless PBX Functional Block Diagram VDD RF OUT Pinout HFA3421 (SOIC) TOP VIEW GND VBIAS RF IN GND 1 2 3 4 8 7 6 5 GND VDD RF OUT GND EXTENDED BIAS LNA 1 RF IN 2-1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright (c) Intersil Corporation 2000 PRISM(R) is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation. HFA3421 Absolute Maximum Ratings Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10VDC Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +17dBm Supply Current (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA Thermal Information Thermal Resistance (Typical, Note 2) JA (oC/W) SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Solder 10s). . . . . . . . . . . . . . . .300oC (SOIC - Lead Tips Only) Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTES: 1. Only if pin #2 is used to increase current. 2. JA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications TA = 25oC, Z0 = 50, VDD = +5V, PIN = -30dBm, f = 1.7-2.3GHz, VBIAS = Open Circuit Unless Otherwise Specified MIN 1.7 14 2.7 TBD TBD TYP 20 1.65 1.5:1 1.5:1 -14.0 -14.0 7 -1 30 8 TBD TBD 2.30 5.5 TBD TBD dB dB dBm dBm dB mA V V mA MAX 2.3 UNITS GHz dB dB PARAMETER LNA Input Frequency Range Gain Noise Figure Input VSWR Output VSWR Input Return Loss Output Return Loss Output 1dB Compression Input IP3 Reverse Isolation Supply Current at VCC = 5V Supply Range VBIAS Voltage VBIAS Current Typical Performance Curves 24 TA = 25oC 5V, 20mA 5V, 8mA GAIN (dB) 20 NOISE FIGURE (dB) 22 1.8 3V, 8mA 1.7 5V, 8mA 1.9 TA = 25oC 18 3V, 8mA 1.6 5V, 20mA 16 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 FREQUENCY (GHz) 1.5 1.70 1.75 1.80 1.85 1.90 1.95 2.00 FREQUENCY (GHz) FIGURE 1. GAIN vs FREQUENCY FIGURE 2. NOISE FIGURE vs FREQUENCY 2-2 HFA3421 Typical Performance Curves 3.0 INPUT 2.5 OUTPUT VSWR 2.0 INPUT IP3 (dBm) -2 5V, 8mA -4 3V, 8mA TA = 25oC 5V, 8mA 0 5V, 20mA (Continued) 2 1.5 -6 TA = 25oC 1.0 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 -8 1.70 1.75 1.80 1.85 1.90 1.95 2.00 FREQUENCY (GHz) FREQUENCY (GHz) FIGURE 3. VSWR vs FREQUENCY FIGURE 4. INPUT IP3 vs FREQUENCY 24 TA = 25oC NOISE FIGURE (dB) 22 GAIN (dB) -40oC 25oC 2.4 85oC 2.1 25oC 1.8 5V, 8mA 20 18 85oC 1.5 -40oC 16 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 FREQUENCY (GHz) 1.2 1.70 1.75 1.80 1.85 1.90 1.95 2.00 FREQUENCY (GHz) FIGURE 5. GAIN vs FREQUENCY FIGURE 6. NOISE FIGURE vs FREQUENCY Typical Application Circuit 500pF 15nH +VDD RF SIGNAL OUTPUT 2.4GHz 8 7 6 3 5 4 VBIAS (PIN 2) NORMAL BIAS Open EXTENDED BIAS 30 to 35 to Ground 1 PIN 2 ALLOWS FOR AN EXTERNAL RESISTOR RBB TO BE USED TO GROUND FOR AN OPTIONAL 20mA CURRENT OPERATION. RECOMMENDED VALUES FOR THE CHIP RESISTOR ARE 30 TO 35. RF SIGNAL INPUT 2.4GHz FIGURE 7. REFERENCE APPLICATION/TEST DESIGN SETUP SCHEMATIC: LOW NOISE AMPLIFIER 2-3 2 RBB |
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