DAB L-band 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 L-band (1452 MHz to 1492 MHz), the product can provide 15.5dB gain and 1.54dB 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 L-band 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 1dB Compression Input Power Input 3rd Order Intercept Point Gain Noise Figure Input Return Loss Output Return Loss Isolation Condition Result Unit f = 1452 MHz f = 1472 MHz f = 1492 MHz f = 1452 MHz f = 1472 MHz f = 1492 MHz f = 1452 MHz f = 1472 MHz f = 1492 MHz f = 1452 MHz f = 1472 MHz f = 1492 MHz f = 1452 MHz f = 1472 MHz f = 1492 MHz 2.6 8.5 15.5 15.4 15.3 11.7 11.6 11.4 11.0 12.0 12.9 19.9 19.9 19.9 2.8 9.4 15.6 15.5 15.4 1.52 1.54 1.62 12.1 11.9 11.5 11.3 12.5 13.5 20.5 20.3 20.3 3.0 10.3 15.8 15.7 15.5 12.6 12.2 11.6 11.7 12.9 13.9 20.7 20.6 20.6 V mA dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB Pin1dB f = 1472 MHz - -10 - dBm IIP3 f1 = 1472 MHz f2 = 1473 MHz - 0 - dBm Pin = -30 dBm 2/10 DAB L-band Amplifier Using the MCH4015 ■Circuit Design Vcc = 2.8V C6 R1 R2 L3 L2 C1 C2 L1 OUTPUT INPUT C3 TR1 C5 C4 ■Evaluation Board 3/10 DAB L-band Amplifier Using the MCH4015 ■Bill of Materials Item Symbol Value Manufacturer Size Bip-Tr TR1 MCH4015 ON Semiconductor SC82 C1,C2 C3,C4 100 pF 3 pF TAIYOYUDEN TAIYOYUDEN 1005 1005 C5 1.6 pF Murata GQM1884C2A1R6CB01 1608 C6 0.1 uF TAIYOYUDEN 1608 R1 56 Ω Various 1608 Capacitor Resistor Inductor Material R2 22 kΩ Various 1608 L1 1.8 nH TOKO LL1005-FHL1N8S 1005 L2 3.9 nH TOKO LL1005-FHL3N9S 1005 L3 33 nH TOKO LL1005-FHL33NJ 1005 - FR4 - 24.5x12.7mm 4/10 DAB L-band Amplifier Using the MCH4015 Power Gain ‐ dB ■Power Gain 20 19 18 17 2.8V 3.0V 16 15 2.6V 14 13 12 11 10 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Frequency ‐ MHz ■Isolation 0 ‐5 Isolation ‐ dB ‐10 ‐15 2.8V ‐20 ‐25 2.6V 3.0V ‐30 ‐35 ‐40 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Frequency ‐ MHz 5/10 DAB L-band Amplifier Using the MCH4015 ■Input Return Loss Input Return Loss ‐ dB 0 ‐5 2.6V 2.8V ‐10 3.0V ‐15 ‐20 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Frequency ‐ MHz ■Output Return Loss Output Return Loss ‐ dB 0 ‐5 2.6V ‐10 ‐15 3.0V 2.8V ‐20 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Frequency ‐ MHz 6/10 DAB L-band Amplifier Using the MCH4015 ■Noise Figure 3 Noise Figure ‐ dB 2.5 2 1.5 1 0.5 0 1440 1450 1460 1470 1480 Frequency ‐ MHz 1490 1500 ■S11, S21, S12, S22 Wide Span 40 S11,S21,S12,S22 ‐ dB 20 S21 S11 0 S22 ‐20 ‐40 S12 ‐60 ‐80 10 100 1000 Frequency ‐ MHz 10000 7/10 DAB L-band Amplifier Using the MCH4015 S(1,1) ■Smith Chart Input Return Loss 1472 MHz freq (1.300GHz 1.700GHz) 1.3 GHz toto1.7 GHz S(2,2) ■Smith Chart Output Return Loss 1472 MHz freq1.3 (1.300GHz 1.700GHz) GHz toto1.7 GHz 8/10 DAB L-band Amplifier Using the MCH4015 ■Gain 1dB Compression Point 15 Output Power ‐ dBm 10 5 0 ‐5 ‐10 ‐15 ‐20 ‐25 ‐30 ‐45 ‐40 ‐35 ‐30 ‐25 ‐20 ‐15 Input Power ‐ dBm ‐10 ‐5 0 ■Input 3rd Order Intercept Point f1 = 1452 MHz, f2 = 1492 MHz, Pin = -30 dBm 9/10 DAB L-band Amplifier Using the MCH4015 ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. 10/10