EB2750QFN-AA FPM2750QFN 1.7 - 2.0GHz LNA EVALUATION BOARD FEATURES • • • • • Measured @ 1.85GHz 23.5 dBm Output Power 17.5 dB Small Signal Gain 0.60 dB Noise Figure 33 dBm OIP3 measured @ Pout = 5dBm (per tone) Bias 3V, 50mA 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 FPM2750QFN; a double-heterojunction, 750 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. PERFORMANCE Freq: (GHz) N.F.1 (dB) 1.70 0.60 1.75 0.61 1.80 0.60 1.85 0.60 1.90 0.60 1.95 0.60 2.00 0.62 1. Includes input coupler loss of 0.12dB 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. EB2750QFN-AA FPM2750QFN 1.7 - 2.0GHz LNA EVALUATION BOARD BOARD LAYOUT AND SCHEMATIC Vd1 1.0uF 33pF P4 0.01uF 33pF L3 Lg 0.01uF R1 P3 Ld P1 33pF L1 33pF L2 C1 33pF C2 33pF A2 f 1SF xxxx A1 Ld Lg L4 Q1 R2 33pF 33pF 0.01uF 0.01uF P5 P6 1.0uF 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 FPM2750QFN EVAL Board 0.01uF Schematic 33pF @ 1.7 - 2.0GHz -Vg Vd 0.01uF 33pF 20 Ohm 33pF 1.0uF 22 nH 22 nH L1 50 Ohm 33pF C3 RF IN 50 Ohm L3 33pF C4 L2 33pF L4 22 nH 33pF RF OUT 22 nH 33pF 20 Ohm 0.01uF 1.0uF 0.01uF -Vg Vd 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected].