EB21500QFN-AA FPM21500QFN 1.7 - 2.0GHz LNA EVALUATION BOARD FEATURES Measured @ 1.85GHz • 29 dBm Output Power • 16.5 dB Small Signal Gain • 0.65 dB Noise Figure • 38 dBm OIP3 measured @ Pout = 12dBm (per tone) ● Bias 4V, 100mA DESCRIPTION AND APPLICATIONS The data given above is based on measurements taken on the evaluation board described in this data sheet. This evaluation board is a balanced, dual biased, low noise amplifier. It is reactively matched at a frequency of 1700 to 2000 MHz. The active device is a Filtronic FPM21500QFN; a double-heterojunction, 1500 μm gate periphery PHEMT. Biasing can be applied at the bias pins on the top and bottom of the board. A negative gate voltage is required for current limiting. Ground connection should be established prior to the gate and drain bias connections. This board is thin and flexible, so caution should be exercised when connecting it to coaxial cables. SCHEMATIC FPM21500QFN EVAL Board 0.01uF Schematic 33pF @ 1.7 - 2.0GHz -Vg Vd 0.01uF 33pF 20 Ohm 33pF RF IN 50 Ohm 1.0uF 22 nH 22 nH L1 50 Ohm L3 C1 C2 33pF C3 C4 L2 33pF L4 33pF 22 nH 33pF RF OUT 22 nH 33pF 20 Ohm 0.01uF 1.0uF 0.01uF -Vg Vd BOARD LAYOUT 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. EB21500QFN-AA FPM21500QFN 1.7 - 2.0GHz LNA EVALUATION BOARD Vd1 1.0uF 33pF 33pF L3 Lg C1 33pF L1 C3 33pF C4 33pF A2 L2 R2 33pF 33pF 1.0uF 0.01uF 0.01uF P5 Ld L4 Q1 Lg 33pF C2 f 1SF xxxx A1 P4 0.01uF 0.01uF R1 P3 Ld P1 P6 P2 Vd2 The circuit used was designed using Roger 4350 material with a core thickness of 30 mils and 0.5oz copper cladding. The dielectric constant is 3.48 Recommended bias applied to the circuit is 4V, 100mA with a negative gate voltage for current limiting. 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. EB21500QFN-AA FPM21500QFN 1.7 - 2.0GHz LNA EVALUATION BOARD 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected].