PCS LNA/Downconverter 1800-2000 MHz MADCSM0012 V2 Features • • • • • • • Functional Block Diagram 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 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. Ordering Information1 Pin No. Pin Name Description 1 LNA IN Input to LNA; RF matching required 2 GND DC and RF Ground 3 LNA SRC Source of LNA output stage FET. RF bypassing required. Off-chip resistor may be used to increase IIP3 4 LNA OUT 50 Ohm LNA output; DC Blocked 5 LNA VDD2 LNA second stage supply voltage; RF bypassing required 6 VCTL Downconverter bias control. 0 to 3.0 V allowed Part Number Package 7 GND DC and RF Ground MADCSM0012 Bulk Packaging 8 RFA VDD RFA supply voltage; RF bypassing required MADCSM0012TR Tape and Reel (1K Reel) MADCSM0012SMB Sample Test Board 1. Reference Application Note M513 for reel size information. Absolute Maximum Ratings 2,3 1 Pin Configuration Parameter Absolute Maximum Voltage 6V Input Power 0 dBm Operating Temperature -30°C to +85°C Storage Temperature -65°C to +150°C 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. 9 GND DC and RF Ground 10 RFA IN 50 Ohm RFA Input; DC Blocked 11 LOA VDD LOA supply voltage; RF bypassing required 12 GND DC and RF Ground 13 LOA IN Local oscillator input (-10 to –5 dBm) 14 IF OUT IF Output of downconverter; IF matching required 15 IFA MATCH IF matching between mixer and IFA; required an inductor to ground 16 LNA VDD1 LNA first stage supply voltage; RF bypassing required • 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 MADCSM0012 V2 Electrical Specifications - Korean Band PCS: Test Conditions: VDD = 3.0 V, RF = 1855 MHz, IF = 210 MHz, LO = 1645 MHz, LO = -10 dBm, TA = 25°C Low Noise Amplifier Parameter Test Conditions Units Min Typ Max Gain — dB — 15 — Noise Figure — dB — 1.35 — VSWR In/Out — Ratio — 2:1 — Input IP3 — dBm — 6 — Idd — mA — 15 — Parameter Test Conditions Units Min. Typ. Max. Conversion Gain VCTL = 3.0 V VCTL = 1.0 V dB dB 22.5 — 25 21 27.5 — Noise Figure VCTL = 3.0 V dB — 2.3 3.2 Input IP3 RF Input = -30 dBm, VCTL = 3.0V dBm -11 -9 — Isolation LO to RF, VCTL = 3.0 V LO to IF, VCTL = 3.0 V RF to IF, VCTL = 3.0 V dB dB dB — — — 50 31 18 — — — IDD VCTL = 3.0 V mA — 25 37 Cascaded LNA/Downconverter 4 4. Complete cascaded measurements taken with 3 dB pad between LNA output and Downconverter input (RFA IN). External Circuitry Parts List (Korean Band PCS) Sample Board Schematic IFA OUT C8 C9 LNA VDD1 L2 C7 Part Value Case Size Purpose C1 10 pF 0402 LNA Input Matching C2 1.2 pF 0402 LNA Input Matching C3 0.1 µF 0402 LNA Source Bypass C4, C5, C6, C9 0.1 µF 0402 RF Bypass C7 0.1 µF 0402 IF Bypass C8 6.8 pF 0402 IF Matching L1 6.2 nH 0603 LNA Matching L2 47 nH 0603 IF Output Matching L3 120 nH 0603 IF Mixer Matching R1 — 0603 Optional Resistor to increase LNA IIP3 R2 3010 Ω 0603 Voltage Control Resistor IFA VDD L3 LOA IN 16 C1 1 LNA IN L1 C2 C6 LOA VDD R1 RFA IN C3 LNA OUT LNA VDD2 RFA VDD R2 C4 C5 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. 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 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. 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 MADCSM0012 V2 Typical Performance Curves vs. Temperature LNA Gain LNA Output Return Loss 0 17 -30°C 16 -5 15 -10 +25°C +85°C -15 14 -30°C +25°C +85°C 13 1840 1845 1850 1855 1860 1865 1870 -20 1840 1845 1850 1860 1865 1870 1865 1870 LNA Input IP3 LNA Input Return Loss 10 0 -30°C -30°C +25°C +25°C -5 8 +85°C -10 6 -15 4 -20 1840 1855 Frequency (MHz) Frequency (MHz) 1845 1850 1855 1860 1865 1870 2 1840 +85°C 1845 1850 1855 1860 Frequency (MHz) Frequency (MHz) LNA Noise Figure Full Chain Conversion Gain 28 2.5 2.0 26 1.5 24 1.0 -30°C +25°C +85°C 22 -30°C +25°C +85°C 0.5 0.0 1840 4 1845 1850 1855 1860 1865 1870 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. 20 1840 1845 1850 1855 1860 1865 1870 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 MADCSM0012 V2 Typical Performance Curves vs. Temperature Full Chain Noise Figure Full Chain Input IP3 4 -6 3 -8 2 -10 1 0 1840 1845 1850 1855 1860 1865 -30°C -12 -30°C +25°C +85°C +25°C +85°C 1870 -14 1840 1845 Frequency (MHz) 1850 1855 1860 1865 Full Chain IF Return Loss Full Chain LO Return Loss 0 0 -5 -5 -10 -10 -15 -15 -20 -20 -30°C -30°C -25 +25°C +25°C -25 +85°C +85°C -30 150 1870 Frequency (MHz) 175 200 225 250 275 300 -30 1200 1400 Frequency (MHz) 1600 1800 2000 2200 Frequency (MHz) Full Chain Port to Port Isolation Full Chain Conversion Gain vs. VCTL 28 60 1.0 V 2.0 V 3.0 V 50 26 40 24 30 20 22 LO-to-IF RF-to-IF LO-to-RF RF-to-LO 10 0 1840 1850 1860 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. 20 1840 1845 1850 1855 1860 1865 1870 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 MADCSM0012 V2 3mm 16-Lead PQFN† † 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.