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| PCS LNA/Downconverter 1800-2000 MHz Features * * * * * * * Highly Integrated LNA and Downconverter 3mm 16-Lead PQFN Operates over 2.7 V to 5 V Supply Voltage Low Noise Figure: 2.3 dB Typical High Input Intercept Point: -9 dBm Typical Continuous Current Control Downconverter Low LO Drive Level: -10 dBm MADCSM0012 V2 Functional Block Diagram Description M/A-COM's MADCSM0012 integrated downconverter combines a low noise amplifier, a RF amplifier, a downconverting mixer, an IF amplifier, and LO buffer amplifier. The MADCSM0012 is packaged in a low cost 3mm 16-Lead PQFN with an exposed pad for improved high frequency grounding. M/A-COM designed the MADCSM0012 for handsets requiring wide dynamic range and low power consumption. By application of a suitable control voltage to pin 6, the linearity of the device can be controlled in real time to keep the current as low as possible The MADCSM0012 is fabricated using M/A-COM's 0.5-micron low noise E/D GaAs MESFET process. The process features full passivation for increased performance and reliability. Pin Configuration Pin No. Pin Name 1 2 3 4 5 6 LNA IN GND LNA SRC LNA OUT LNA VDD2 VCTL GND RFA VDD GND RFA IN LOA VDD GND LOA IN IF OUT IFA MATCH LNA VDD1 Description Input to LNA; RF matching required DC and RF Ground Source of LNA output stage FET. RF bypassing required. Off-chip resistor may be used to increase IIP3 50 Ohm LNA output; DC Blocked LNA second stage supply voltage; RF bypassing required Downconverter bias control. 0 to 3.0 V allowed DC and RF Ground RFA supply voltage; RF bypassing required DC and RF Ground 50 Ohm RFA Input; DC Blocked LOA supply voltage; RF bypassing required DC and RF Ground Local oscillator input (-10 to -5 dBm) IF Output of downconverter; IF matching required IF matching between mixer and IFA; required an inductor to ground LNA first stage supply voltage; RF bypassing required Ordering Information1 Part Number MADCSM0012 MADCSM0012TR MADCSM0012SMB Package Bulk Packaging Tape and Reel (1K Reel) Sample Test Board 7 8 9 10 11 12 13 14 15 16 1. Reference Application Note M513 for reel size information. Absolute Maximum Ratings 2,3 Parameter Voltage Input Power Operating Temperature Storage Temperature Absolute Maximum 6V 0 dBm -30C to +85C -65C to +150C 1 2. Exceeding any one or combination of these limits may cause permanent damage to this device. 3. M/A-COM does not recommend sustained operation near these survivability limits. M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. PCS LNA/Downconverter 1800-2000 MHz Electrical Specifications - Korean Band PCS: Test Conditions: VDD = 3.0 V, RF = 1855 MHz, IF = 210 MHz, LO = 1645 MHz, LO = -10 dBm, TA = 25C MADCSM0012 V2 Low Noise Amplifier Parameter Gain Noise Figure VSWR In/Out Input IP3 Idd Test Conditions -- -- -- -- -- Units dB dB Ratio dBm mA Min -- -- -- -- -- Typ 15 1.35 2:1 6 15 Max -- -- -- -- -- Cascaded LNA/Downconverter 4 Parameter Conversion Gain Noise Figure Input IP3 Isolation IDD Test Conditions VCTL = 3.0 V VCTL = 1.0 V VCTL = 3.0 V RF Input = -30 dBm, VCTL = 3.0V LO to RF, VCTL = 3.0 V LO to IF, VCTL = 3.0 V RF to IF, VCTL = 3.0 V VCTL = 3.0 V Units dB dB dB dBm dB dB dB mA Min. 22.5 -- -- -11 -- -- -- -- Typ. 25 21 2.3 -9 50 31 18 25 Max. 27.5 -- 3.2 -- -- -- -- 37 4. Complete cascaded measurements taken with 3 dB pad between LNA output and Downconverter input (RFA IN). Sample Board Schematic IFA OUT C9 LNA VDD1 L3 C8 C7 IFA VDD LOA IN 16 External Circuitry Parts List (Korean Band PCS) L2 Part C1 C2 Value 10 pF 1.2 pF 0.1 F 0.1 F 0.1 F 6.8 pF 6.2 nH 47 nH 120 nH -- 3010 Case Size 0402 0402 0402 0402 0402 0402 0603 0603 0603 0603 0603 Purpose LNA Input Matching LNA Input Matching LNA Source Bypass RF Bypass IF Bypass IF Matching LNA Matching IF Output Matching IF Mixer Matching Optional Resistor to increase LNA IIP3 Voltage Control Resistor C1 LNA IN C2 R1 C3 LNA OUT L1 1 C6 LOA VDD RFA IN C3 C4, C5, C6, C9 C7 C8 L1 LNA VDD2 C4 R2 C5 RFA VDD L2 L3 R1 R2 VCTL 2 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. PCS LNA/Downconverter 1800-2000 MHz Operating Instructions M/A-COM's MADCSM0012 is a highly integrated MMIC LNA/downconverter for operation in the 1800-2000 MHz PCS frequency band. The downconverter provides exceptional RF performance while consuming low DC current and is packaged in a low cost plastic package. It is ideal for lightweight battery operated portable radio systems. The MADCSM0012 consists of an LNA, RFA, single-ended mixer and single-ended IF output buffer as shown in the block diagram. Surface mount resistors, inductors and capacitors are used in conjunction with the LNA/downconverter to optimize the trade-offs among performance, tunability and ease of use. The sample board schematic shows the LNA/downconverter and required off-chip components. The input of the LNA is matched externally with a series inductor (L1) and a shunt capacitor (C1) to provide a low loss match to the optimum noise impedance in the band of interest. A high Q inductor such as Coilcraft's 0402CS series must be used if the specified noise figures are to be achieved. The series capacitor, C2, is a DC blocking and input matching capacitor. The LNA is nominally biased with 15 mA to give an input IP3 of +6 dBm. An external resistor, R1, may be used to increase the LNA bias current and thus increase the IP3. An external image reject filter is required between the LNA output and RFA input to prevent downconversion of noise at the image frequency to the IF. This filter should have a 50ohm input and output impedance. The mixer is a single-ended floating FET mixer that provides exceptional linearity and isolation with low loss and no DC current. An off-chip inductor, L3, is required to match the output of the mixer to the input of the IF buffer amplifier. The case size of L3 is typically 0603 but if more gain is needed, use a 0805 case size. MADCSM0012 V2 The IF output port is the open drain of the IF buffer amplifier. This allows maximum flexibility of the intermediate frequency and also IF filter. A matching network such as that shown herein can be used to match to 50 ohms from the output impedance of the buffer to the input impedance of the filter at the 210 MHz intermediate frequency. The inductor also acts as a choke for the DC supply line. Elements L2 and C8 provide the necessary impedance transformation. The LO input port is matched on-chip to 50 ohms. An LO buffer amplifier amplifies the -10 dBm input signal to the level required to drive the mixer. Performance is optimum with a drive level of -7 dBm. All DC supply lines must be properly bypassed at RF frequencies to obtain optimum performance and at lower frequency to maintain unconditional stability. Capacitors C4, C5, C6, C7 and C9 are RF bypass capacitors for the LNA, RFA and LOA. The value and placement of these capacitors is critical in determining the frequency response of these amplifiers. Capacitor C3 is a source bypass capacitor for the second stage of the low noise amplifier. The placement of this capacitor will affect the gain of the LNA. For best performance, all the RF bypass capacitors should be placed as close to the device as possible. Recommended PCB Configuration 3 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. PCS LNA/Downconverter 1800-2000 MHz Typical Performance Curves vs. Temperature LNA Gain 17 MADCSM0012 V2 LNA Output Return Loss 0 -30C 16 -5 +25C +85C 15 -10 14 -30C +25C +85C -15 13 1840 1845 1850 1855 1860 1865 1870 -20 1840 1845 1850 1855 1860 1865 1870 Frequency (MHz) Frequency (MHz) LNA Input Return Loss 0 -30C +25C LNA Input IP3 10 -30C +25C -5 +85C 8 +85C -10 6 -15 4 -20 1840 1845 1850 1855 1860 1865 1870 2 1840 1845 1850 1855 1860 1865 1870 Frequency (MHz) Frequency (MHz) LNA Noise Figure 2.5 Full Chain Conversion Gain 28 2.0 26 1.5 24 1.0 22 -30C +25C +85C 0.5 -30C +25C +85C 0.0 1840 1845 1850 1855 1860 1865 1870 20 1840 1845 1850 1855 1860 1865 1870 4 Frequency(MHz) M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. Frequency (MHz) * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. PCS LNA/Downconverter 1800-2000 MHz Typical Performance Curves vs. Temperature Full Chain Noise Figure 4 MADCSM0012 V2 Full Chain Input IP3 -6 3 -8 2 -10 1 -30C +25C +85C -12 -30C +25C +85C 0 1840 1845 1850 1855 1860 1865 1870 -14 1840 1845 1850 1855 1860 1865 1870 Frequency (MHz) Frequency (MHz) Full Chain IF Return Loss 0 Full Chain LO Return Loss 0 -5 -10 -15 -20 -30C -5 -10 -15 -20 -30C +25C +85C -25 -30 150 -25 -30 1200 +25C +85C 175 200 225 250 275 300 1400 1600 1800 2000 2200 Frequency (MHz) Frequency (MHz) Full Chain Port to Port Isolation 60 Full Chain Conversion Gain vs. VCTL 28 1.0 V 2.0 V 3.0 V 50 26 40 30 20 22 24 10 0 1840 LO-to-IF RF-to-IF LO-to-RF RF-to-LO 1850 1860 1870 20 1840 1845 1850 1855 1860 1865 1870 Frequency (MHz) 5 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. Frequency (MHz) * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. PCS LNA/Downconverter 1800-2000 MHz 3mm 16-Lead PQFN MADCSM0012 V2 Meets JEDEC moisture sensitivity level 1 requirements. Handling Procedures Please observe the following precautions to avoid damage: Static Sensitivity Gallium Arsenide Integrated Circuits are sensitive to electrostatic discharge (ESD) and can be damaged by static electricity. Proper ESD control techniques should be used when handling these devices. 6 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. |
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