{"product_id":"spf5189z-rf-low-noise-amplifier-sot89-50mhz-4ghz-2-4db-nf-lna-2pack","title":"SPF5189Z RF Low Noise Amplifier — SOT-89, 50MHz–4GHz, 2.4dB NF, LNA (2-Pack)","description":"\u003ch2\u003eSPF5189Z RF Low Noise Amplifier — SOT-89, 50MHz–4GHz, 2.4dB NF, 19dB Gain (2-Pack)\u003c\/h2\u003e\u003cp\u003eThe SPF5189Z is a wideband RF low noise amplifier (LNA) IC in a SOT-89 SMD package, covering 50MHz to 4GHz with 19dB typical gain and 2.4dB noise figure. Designed for receive-path signal amplification, it is widely used in SDR (software-defined radio) front-ends, WiFi range extension, GPS signal amplification, and 2.4GHz\/5.8GHz RF circuit design. The single-supply 3–5V operation and 50Ω matched input\/output make it easy to integrate into RF signal chains.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eSOT-89 (SMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e50MHz – 4GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e19dB typ. (at 900MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Figure (NF)\u003c\/td\u003e\n\u003ctd\u003e2.4dB typ. (at 900MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput IP3 (OIP3)\u003c\/td\u003e\n\u003ctd\u003e+27dBm typ.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eP1dB (output)\u003c\/td\u003e\n\u003ctd\u003e+18dBm typ.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3V – 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Current\u003c\/td\u003e\n\u003ctd\u003e~60mA (at 5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput\/Output Impedance\u003c\/td\u003e\n\u003ctd\u003e50Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eSPF5189Z vs SKY65111 vs BGA2803 — LNA Comparison\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSPF5189Z\u003c\/th\u003e\n\u003cth\u003eSKY65111\u003c\/th\u003e\n\u003cth\u003eBGA2803\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e50MHz–4GHz\u003c\/td\u003e\n\u003ctd\u003e0.1–6GHz\u003c\/td\u003e\n\u003ctd\u003e0.05–6GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e19dB\u003c\/td\u003e\n\u003ctd\u003e20dB\u003c\/td\u003e\n\u003ctd\u003e20dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Figure\u003c\/td\u003e\n\u003ctd\u003e2.4dB\u003c\/td\u003e\n\u003ctd\u003e1.0dB\u003c\/td\u003e\n\u003ctd\u003e0.7dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply\u003c\/td\u003e\n\u003ctd\u003e3–5V\u003c\/td\u003e\n\u003ctd\u003e3–5V\u003c\/td\u003e\n\u003ctd\u003e3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eSDR, WiFi, general LNA\u003c\/td\u003e\n\u003ctd\u003eLow-noise receive chain\u003c\/td\u003e\n\u003ctd\u003eUltra-low noise, GPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose SPF5189Z?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50MHz–4GHz wideband\u003c\/strong\u003e — covers FM (88–108MHz), GSM (900MHz), WiFi (2.4GHz), and 5.8GHz bands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e19dB gain\u003c\/strong\u003e — significant signal amplification for weak signal reception\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.4dB noise figure\u003c\/strong\u003e — low noise for receive-path amplification without degrading SNR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3–5V supply\u003c\/strong\u003e — compatible with 3.3V and 5V systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50Ω matched\u003c\/strong\u003e — direct integration into standard 50Ω RF signal chains\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With \/ Common Use Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDR (RTL-SDR) front-end\u003c\/strong\u003e: Boost weak signals before RTL2832U dongle for improved sensitivity on HF\/VHF\/UHF bands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiFi range extension\u003c\/strong\u003e: 2.4GHz receive-path LNA for ESP8266\/ESP32 external antenna systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGPS signal amplification\u003c\/strong\u003e: 1575MHz GPS L1 band signal amplification for weak signal environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHam radio receive\u003c\/strong\u003e: 144MHz (2m) or 432MHz (70cm) band LNA for weak signal reception\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRF module testing\u003c\/strong\u003e: Wideband amplifier for RF lab measurements and signal chain testing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I bias SPF5189Z for operation?\u003c\/strong\u003e\u003cbr\u003eA: SPF5189Z requires a DC bias on the RF input\/output through bias tees (RF choke + DC block capacitor). Connect VCC (3–5V) through a 100nH RF choke to the output port. Add 100pF DC block capacitors on input and output for AC coupling. The IC is internally matched to 50Ω — no external matching network needed for 50Ω systems. Refer to the SPF5189Z datasheet application circuit for the complete bias network.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can SPF5189Z be used as a transmit amplifier?\u003c\/strong\u003e\u003cbr\u003eA: SPF5189Z is designed as a receive LNA (low noise amplifier), not a power amplifier. Its P1dB of +18dBm limits transmit power to ~60mW. For transmit amplification, use a dedicated PA (power amplifier) IC such as SKY65135, RFX2401C, or SE2431L. Using an LNA in transmit mode may damage the IC if input power exceeds the P1dB compression point.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What PCB layout considerations are needed for SPF5189Z?\u003c\/strong\u003e\u003cbr\u003eA: Use a 50Ω microstrip transmission line (width depends on PCB substrate — ~2.9mm on FR4 at 1.6mm thickness). Keep RF traces short and direct. Place decoupling capacitors (100pF + 10nF) close to the VCC pin. Use a solid ground plane under the RF traces. Avoid routing digital signals near RF traces to prevent interference.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2× SPF5189Z RF Low Noise Amplifier IC (SOT-89)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991469609195,"sku":"\u003cnone\u003e","price":20.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/spf5189z-sot89-rf-power-amplifier.webp?v=1761634480","url":"https:\/\/keszoox.com\/products\/spf5189z-rf-low-noise-amplifier-sot89-50mhz-4ghz-2-4db-nf-lna-2pack","provider":"Keszoox","version":"1.0","type":"link"}