DAB band-Ⅲ Amplifier Using the MCH4015 Application Note http://onsemi.com Overview This application note explains about ON Semiconductor’s MCH4015 which is used as a Low Noise Amplifier (LNA) for DAB (Digital Audio Broadcast). The MCH4015 is a silicon bipolar transistor best suited for high-frequency applications which is assembled in the 4-pin surface mount package. For information about the performance, please refer to the datasheet of this product. Since the evaluation board is adjusted to achieve optimal performance in band-Ⅲ (170 MHz to 250 MHz), the product can provide 23dB gain and 1.06dB noise figure. A standard material FR4 is used for the printed circuit board (PCB). Please note that the losses of the PCB and the SMA connector are not excluded from the noise figure. Semiconductor Components Industries, LLC, 2014 February, 2014 – Rev. 0 1/10 DAB band-Ⅲ Amplifier Using the MCH4015 ■Summary of Data Ta = 25 °C, Input Power = -40 dBm Parameter Symbol DC Voltage DC Current Vcc Icc Gp1 Gp2 Gp3 NF1 NF2 NF3 RLin1 RLin2 RLin3 RLout1 RLout2 RLout3 ISL1 ISL2 ISL3 Gain Noise Figure Input Return Loss Output Return Loss Isolation Gain 1dB Compression Input Power Input 3rd Order Intercept Point Condition Result Unit f = 170 MHz f = 210 MHz f = 250 MHz f = 170 MHz f = 210 MHz f = 250 MHz f = 170 MHz f = 210 MHz f = 250 MHz f = 170 MHz f = 210 MHz f = 250 MHz f = 170 MHz f = 210 MHz f = 250 MHz 2.6 8.5 22.8 22.6 22.0 10.9 11.4 11.0 13.3 13.9 14.0 26.0 26.0 26.2 2.8 9.4 23.2 23.0 22.4 0.93 1.06 1.12 11.4 11.7 11.2 14.6 15.3 14.9 26.4 26.4 26.6 3.0 10.3 23.6 23.3 22.7 11.6 11.7 11.1 15.9 16.7 15.8 26.7 26.7 27.0 V mA dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB Pin1dB f = 210 MHz - -20 - dBm IIP3 f1 = 210 MHz f2 = 211 MHz - -7 - dBm Pin = -30 dBm 2/10 DAB band-Ⅲ Amplifier Using the MCH4015 ■Circuit Design Vcc = 2.8V C5 R1 C3 R2 C1 R3 L3 C4 OUTPUT L1 L2 INPUT C2 TR1 ■Evaluation Board 3/10 DAB band-Ⅲ Amplifier Using the MCH4015 ■Bill of Materials Item Symbol Value Manufacturer Size Bip-Tr TR1 MCH4015 ON Semiconductor SC82 C1,C2,C3 1000 pF TAIYOYUDEN 1005 C4 7 pF TAIYOYUDEN 1005 C5 0.1 uF TAIYOYUDEN 1608 R1 56 Ω Various 1608 R2 22 kΩ Various 1608 R3 1.2 kΩ Various 1005 L1,L2 12 nH TOKO LL1005-FHL12NJ 1005 L3 120 nH TOKO LL1608-FS121N 1608 - FR4 - 25.4x12.7mm Capacitor Resistor Inductor Material 4/10 DAB band-Ⅲ Amplifier Using the MCH4015 Power Gain ‐ dB ■Power Gain 25 24 23 22 21 20 19 18 17 16 15 3.0V 2.8V 2.6V 0 50 100 150 200 250 Frequency ‐ MHz 300 350 400 ■Isolation 0 ‐5 Isolation ‐ dB ‐10 ‐15 ‐20 2.6V ‐25 ‐30 2.8V 3.0V ‐35 ‐40 0 50 100 150 200 250 Frequency ‐ MHz 300 350 400 5/10 DAB band-Ⅲ Amplifier Using the MCH4015 ■Input Return Loss Input Return Loss ‐ dB 0 ‐5 2.8V 2.6V ‐10 3.0V ‐15 ‐20 0 50 100 150 200 250 Frequency ‐ MHz 300 350 400 300 350 400 ■Output Return Loss Output Return Loss ‐ dB 0 ‐5 ‐10 2.6V ‐15 2.8V 3.0V ‐20 0 50 100 150 200 250 Frequency ‐ MHz 6/10 DAB band-Ⅲ Amplifier Using the MCH4015 ■Noise Figure 3 Noise Figure ‐ dB 2.5 2 1.5 1 0.5 0 50 100 150 200 250 Frequency ‐ MHz 300 350 ■S11, S21, S12, S22 Wide Span 40 S21 S11,S21,S12,S22 ‐ dB 20 0 S11 S22 ‐20 S12 ‐40 ‐60 ‐80 10 100 1000 Frequency ‐ MHz 10000 7/10 DAB band-Ⅲ Amplifier Using the MCH4015 S(1,1) ■Smith Chart Input Return Loss 210 MHz MHz to 410 MHz fr10 eq (10.00MHz to 410.0MHz) S(2,2) ■Smith Chart Output Return Loss 210 MHz fr10 eq (10.00MHz to 410.0MHz) MHz to 410 MHz 8/10 DAB band-Ⅲ Amplifier Using the MCH4015 ■Gain 1dB Compression Point 10 Output Power ‐ dBm 5 0 ‐5 ‐10 ‐15 ‐20 ‐45 ‐40 ‐35 ‐30 ‐25 ‐20 Input Power ‐ dBm ‐15 ‐10 ■Input 3rd Order Intercept Point f1 = 210 MHz, f2 = 211 MHz, Pin = -30 dBm 9/10 DAB band-Ⅲ Amplifier Using the MCH4015 ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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