Dual Mode Cellular Downconverter 869 - 893 MHz Features Functional Block Diagram ` Dual Mode Downconverter with LO Amplifier 3mm 12-Lead PQFN Package Operates over 2.7 V to 5 V Supply Voltage High Gain: 12.5 dB Typical High Input Intercept Point: +8 dBm Typical Low Current Draw: 12 mA Typical Adjustable IP3 Level Low LO Drive Level: -10 dBm ` ` M/A-COM’s MADCSM0011 integrated downconverter combines a downconverting mixer, an IF amplifier, a LO buffer amplifier and an output mode switch. The MADCSM0011 is packaged in a low cost 3mm 12-Lead PQFN package with an exposed pad for improved high frequency grounding. M/A-COM designed the MADCSM0011 for handsets requiring wide dynamic range and low power consumption. A mode switch is incorporated into the MADCSM0011 to switch between CDMA and AMPs operation. The MADCSM0011 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 Part Number Package MADCSM0011 Bulk Packaging MADCSM0011TR Tape and Reel (1K Reel) MADCSM0011SMB Sample Test Board 1. Reference Application Note M513 for reel size information. Absolute Maximum Ratings 2,3 Parameter Absolute Maximum Voltage 6V Input Power 0 dBm Operating Temperature -30°C to +85°C Storage Temperature -65°C to +150°C ` ` Description 1 ` • • • • • • • • MADCSM0011 V2 Pin Configuration Pin No. Pin Name Description 1 MIX Mixer RF Input/Mixer IF Output 2 GND DC and RF Ground 3 LO IN Local oscillator input (-10 to -5 dBm) 4 GND DC and RF Ground 5 LOA VDD LOA supply voltage; RF bypassing required 6 IFA SRC Parallel RC network determines the IFA Current, Gain and IIP3 7 CDMA IF OUT CDMA IF Output of downconverter; IF matching required 8 GND DC and RF Ground 9 AMPS IF OUT AMPs IF Output of downconverter; IF matching required 10 MODE SEL Selects between AMPs and CDMA IF Output 11 IFA VDD IFA supply voltage; RF bypassing required 12 IFA IN IFA Input 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. Dual Mode Cellular Downconverter 869 - 893 MHz MADCSM0011 V2 Electrical Specifications4: Test Conditions: VDD = 3.0 V, RF = 880 MHz, IF = 85 MHz, LO = 965 MHz, TA = +25°C Parameter Test Conditions Units Min Typ Max Conversion Gain LO Pin = -10 dBm dB 10 12.5 15 Noise Figure LO Pin = -10 dBm dB — 7.5 — Input Intercept Point LO Pin = -10 dBm dBm 6 8 — Return Loss RF, LO Pin = -10 dBm LO, LO Pin = -10 dBm dB dB — — 12 13 — — Isolation RF to IF, LO Pin = -10 dBm LO to IF, LO Pin = -10 dBm dB dB 25 18 36 21 — — IDD LO Pin = -10 dBm mA — 12 15 4. All measurements are for both output modes. Recommended PCB Configuration Sample Board Schematic External Circuitry Parts List Part Value Case Size Purpose C1 2.7 pF 0402 Mixer Input RF Matching C2 1000 pF 0402 Mixer to IFA Matching C3,C5, C10,C12 0.1 µF 0402 VDD Bypass C4 0.1 µF 0402 IFA Source Bypass C6,C8 33 pF 0402 IFA Output Matching C7,C9 12 pF 0402 IFA Output Matching C11 0.1 µF 0402 Vmode Bypass L1 16 nH 0603 Mixer Input RF Matching L2 270 nH 0603 Mixer to IFA Matching L3 15 nH 0603 LOA Input Matching L4 15 nH 0603 LOA Matching L5,L6 150 nH 0603 IFA Output Matching R1 34 Ohms 0402 IFA Source Resistor 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. Dual Mode Cellular Downconverter 869 - 893 MHz MADCSM0011 V2 Operating Instructions M/A-COM’s MADCSM0011 is a highly integrated MMIC dual mode downconverter for operation in the 800-900 MHz Cellular 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 MADCSM0011 consists of a single-ended mixer, an LO buffer amplifier, a single-ended IF amplifier and a mode switch. Surface mount resistors, inductors and capacitors are used in conjunction with the downconverter to optimize the trade-offs among performance, tunability and ease of use. The sample board schematic shows the downconverter and required off-chip components. The mixer is a single-ended mixer that provides exceptional linearity and isolation with low loss and no DC current. An off-chip inductor (L2) and capacitor (C2) are required to match the output of the mixer to the input of the IF buffer amplifier. The IF output is selected by the mode switch. Each output port is the open drain of the IF buffer amplifier. This allows maximum flexibility of the intermediate frequency and 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 85.38 MHz intermediate frequency. The inductor also acts as a choke for the DC supply line. Elements L5, C6 and C7 (CDMA mode) and L6, C8 and C9 (AMPS mode) provide the necessary impedance transformations. 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. The 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 a lower frequency to maintain unconditional stability. Capacitors C3, C4, C5, C10, C11 and C12 are RF bypass capacitors for the IFA and LOA. The value and placement of these capacitors is critical in determining the frequency response of these amplifiers. 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. Dual Mode Cellular Downconverter 869 - 893 MHz MADCSM0011 V2 Typical Performance Curves vs. Temperature Input IP3 Conversion Gain 14 14 -30°C +25°C +85°C 12 13 10 8 12 6 -30°C +25°C +85°C 11 10 860 870 4 880 890 900 2 860 870 880 890 900 Frequency (MHz) Frequency (MHz) RF Return Loss Noise Figure 9 0 -30°C +25°C +85°C 8 -5 7 -10 6 -30°C +25°C +85°C 5 860 870 -15 880 890 900 -20 860 870 Frequency (MHz) 880 890 900 Frequency (MHz) IF Return Loss LO Return Loss 0 0 -30°C +25°C +85°C -5 -5 -10 -10 -15 -15 -20 -30°C +25°C +85°C -20 300 -25 500 700 900 1100 1300 1500 Frequency (MHz) 50 70 90 110 130 150 Frequency (MHz) 4 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. Dual Mode Cellular Downconverter 869 - 893 MHz MADCSM0011 V2 Typical Performance Curves vs. Temperature Isolation 40 Handling Procedures RF-to-IF LO-to-IF LO-to-RF 30 Please observe the following precautions to avoid damage: 20 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. 10 0 860 870 880 890 900 Frequency (MHz) 3 mm 12-Lead PQFN† † Meets JEDEC moisture sensitivity level 1 requirements. 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. • 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.