HFA3421 TM Data Sheet September 1997 File Number 4288.1 1.7GHz - 2.3GHz Low Noise Amplifier Features The Intersil HFA3421 PRISM® 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. • Low Noise Figure . . . . . . . . . . . . . . . . . . . . . . . . . . 1.65dB 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. • Low Cost SOIC 8 Lead Plastic Package Ordering Information • Wireless Local Area Networks PART NUMBER TEMP. RANGE (oC) PACKAGE HFA3421IB -40 to 85 8 Ld SOIC HFA3421IB96 -40 to 85 Tape and Reel Pinout PKG. NO. M8.15 • 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 Applications • Wireless Local Loop • TDD Quadrature-Modulated Communication Systems • PCMCIA Wireless Transceivers • TDMA Packet Protocol Radio • PCS/Wireless PBX Functional Block Diagram VDD RF OUT HFA3421 (SOIC) TOP VIEW GND 1 8 GND VBIAS 2 7 VDD RF IN 3 6 RF OUT GND 4 5 GND 2-1 LNA 1 EXTENDED BIAS RF IN 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 © Intersil Corporation 2000 PRISM® is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation. HFA3421 Absolute Maximum Ratings Thermal Information Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10VDC Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +17dBm Supply Current (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA Thermal Resistance (Typical, Note 2) θJA (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. θJA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications TA = 25oC, Z0 = 50Ω, VDD = +5V, PIN = -30dBm, f = 1.7-2.3GHz, VBIAS = Open Circuit Unless Otherwise Specified PARAMETER MIN TYP MAX UNITS LNA Input Frequency Range 1.7 - 2.3 GHz Gain 14 20 Noise Figure - 1.65 2.30 Input VSWR - 1.5:1 - Output VSWR - 1.5:1 - Input Return Loss - -14.0 - dB Output Return Loss - -14.0 - dB Output 1dB Compression - 7 - dBm Input IP3 - -1 - dBm Reverse Isolation - 30 - dB Supply Current at VCC = 5V - 8 - mA Supply Range 2.7 - 5.5 V VBIAS Voltage TBD TBD TBD V VBIAS Current TBD TBD TBD mA dB dB Typical Performance Curves 24 1.9 TA = 25oC TA = 25oC 5V, 20mA NOISE FIGURE (dB) 22 GAIN (dB) 5V, 8mA 20 3V, 8mA 18 1.8 3V, 8mA 5V, 8mA 1.7 1.6 5V, 20mA 16 1.5 1.6 1.7 1.8 1.9 2.0 FREQUENCY (GHz) FIGURE 1. GAIN vs FREQUENCY 2-2 2.1 2.2 1.5 1.70 1.75 1.80 1.85 1.90 1.95 FREQUENCY (GHz) FIGURE 2. NOISE FIGURE vs FREQUENCY 2.00 HFA3421 Typical Performance Curves (Continued) 2 3.0 TA = 25oC INPUT 5V, 8mA 0 5V, 20mA INPUT IP3 (dBm) 2.5 VSWR OUTPUT 2.0 -2 5V, 8mA 3V, 8mA -4 1.5 -6 TA = 25oC 1.0 1.5 1.6 1.7 1.8 1.9 2.0 2.1 -8 1.70 2.2 1.75 1.80 FREQUENCY (GHz) FIGURE 3. VSWR vs FREQUENCY 1.90 1.95 2.00 FIGURE 4. INPUT IP3 vs FREQUENCY 24 2.4 85oC -40oC 22 NOISE FIGURE (dB) TA = 25oC GAIN (dB) 1.85 FREQUENCY (GHz) 25oC 20 18 16 1.6 1.7 1.8 1.9 2.0 2.1 25oC 1.8 1.5 85oC 1.5 5V, 8mA 2.1 2.2 -40oC 1.2 1.70 1.75 1.80 FREQUENCY (GHz) 1.85 1.90 1.95 FREQUENCY (GHz) FIGURE 5. GAIN vs FREQUENCY FIGURE 6. NOISE FIGURE vs FREQUENCY Typical Application Circuit 500pF 15nH +VDD VBIAS (PIN 2) 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 30Ω TO 35Ω. 7 6 5 3 4 30Ω to 35Ω to Ground 2 Open RF SIGNAL OUTPUT 2.4GHz 8 EXTENDED BIAS 1 NORMAL BIAS RBB RF SIGNAL INPUT 2.4GHz FIGURE 7. REFERENCE APPLICATION/TEST DESIGN SETUP SCHEMATIC: LOW NOISE AMPLIFIER 2-3 2.00