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DATA SHEET SKY42068-355LF: 400-1000 MHz High Dynamic Range Active Mixer Applications RF RF Balun GSM/EDGE/CDMA/AMPS/TETRA Mobile radio systems LO_1 Industrial, Scientific, Medical (ISM) band applications LO_2 IF LO_SEL S325 Features High, 3rd Order Input Intercept Point (IIP3) mixer Figure 1. SKY42068-355LF Block Diagram Wideband RF input frequency range (400 to 1000 MHz) CMOS-compatible control interface Description +5 V supply operation The SKY42068-355LF is an integrated, high-dynamic range lownoise receiver down converter. It includes a double-balanced active mixer, Local Oscillator (LO) amplifiers, and dual LO inputs selected by an external switch interface. The LO switch function is managed using an externally controlled CMOS-compatible interface. GND NC NC GND 20 19 18 17 16 15 NC GND 2 14 NC LO_SEL 3 13 NC GND 4 12 IF+ LO_2 5 11 IF– 6 7 8 9 10 GND 1 RF– LO_1 RF+ Skyworks offers lead (Pb)-free, RoHS (Restriction of Hazardous Substances) compliant packaging. Figure 1 shows a functional block diagram for the SKY42068355LF. The 20-pin Quad Flat No-Lead (QFN) device package and pinout are shown in Figure 2. GND QFN (20-pin, 5 x 5 mm) package (MSL3, 260 C per JEDEC JSTD-020) VDD Supports frequency hopping applications GND –40 C to +85 C operating range S326 Figure 2. SKY42068-355LF Pinout – 20-Pin QFN (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 1 103210E • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 22, 2010 DATA SHEET • SKY42068-355LF ACTIVE MIXER Table 1. SKY42068-355LF Signal Descriptions Pin # Name Description Pin # Name Description 1 LO_1 Local oscillator 1 input 11 IF– Negative IF output 2 GND Ground 12 IF+ Positive IF output 3 LO_SEL Select control for LO_1 and LO_2 13 NC No connection 4 GND Ground 14 NC No connection 5 LO_2 Local oscillator 2 input 15 NC No connection 6 GND Ground 16 GND Ground 7 GND Ground 17 NC No connection 8 RF+ Positive RF input 18 NC No connection 9 RF– Negative RF input 19 GND Ground 10 GND Ground 20 VDD Supply voltage Table 2. SKY42068-355LF Absolute Maximum Ratings Parameter Maximum Units VDD 5.5 V Power dissipation PD 1.7 W Input power PIN 22 dBm Thermal resistance RTH Positive DC power supply Symbol Minimum Typical C/W 25 Operating temperature TA –40 +85 C Storage temperature TSTG –40 +125 C Note: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device. CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. Functional Description Electrical and Mechanical Specifications The SKY42068-355LF consists of a high dynamic active mixer, LO amplifiers, and a selectable LO input. The SKY42068-355LF was specifically designed to meet the needs of high performance receivers. Signal pin assignments and functional pin descriptions are described in Table 1. The absolute maximum ratings of the SKY42068-355LF are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. The mixer shares two independent LO signals, LO_1 and LO_2, that are selected using a common CMOS-compatible control signal. With this ability, the device can be used in applications where frequency hopping is required. Typical performance characteristics of the SKY42068-355LF are illustrated in Figures 3 through 10. The LO select logic is as follows: LO_SEL Logic: State: High LO1 enabled (pin 1) Low LO2 enabled (pin 5) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 June 22, 2010 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210E DATA SHEET • SKY42068-355LF ACTIVE MIXER Table 3. SKY42068-355LF Recommended Operating Conditions Parameter Symbol Minimum Typical Maximum Units 4.75 5.0 5.25 V +85 C Positive DC supply voltage VDD Power dissipation PD Operating case temperature TOPR –40 LO_SEL input voltage LO_SELH 2.2 1.1 W V 0.8 LO_SELL V Table 4. SKY42068-355LF Electrical Specifications (Voltage Supply = +5 V, TA = +25 C, LO = 0 dBm, RF Frequency = 900 MHz, IF Frequency = 71 MHz, LO Frequency = 829 MHz, Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units 1000 MHz 1.5:1 2.0:1 RF RF input frequency 400 RF input VSWR (Note 1) Mixer (Note 2) Conversion gain 3.0 Gain variation over temperature –40 to +85 °C Single side band noise figure rd 3 Order Input Intercept Point IIP3 1 MHz tone spacing 3rd Order Input Intercept Point variation over temperature IIP3 –40 to +85 °C +30.0 3.8 dB ±0.8 dB 10 dB +34.5 dBm ±0.8 dB RF to IF isolation (Note 3) +57 +65 dBm LO to IF leakage –25 –31 dBm +17.0 +18.6 dBm –70.0 dBc LO to RF leakage –26 1 dB Input Compression Point IP1dB 2x2 product suppression (Note 4) –20 dBm Local Oscillator LO input frequency (Note 5) LO input VSWR (Note 1) 450 VSWR 1200 1.5:1 2.0:1 +5 LO level input –5 0 LO1 to LO2 isolation 40 50 MHz dBm dB Intermediate Frequency IF output frequency IF output VSWR (Note 1) 50 IF = 50 MHz to 200 MHz 250 1.5:1 MHz 2.0:1 Note 1: In a 50 system obtained with external matching components on input/output ports. Note 2: Include RF balun and IF transformer losses. Note 3: Measured with an RF input power of –10 dBm. Note 4: Measured with an RF input power of –16 dBm. Note 5: Use high side LO injection for RF frequencies below 500 MHz. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103210E • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 22, 2010 3 DATA SHEET • SKY42068-355LF ACTIVE MIXER Typical Performance Characteristics (Voltage Supply = +5 V, TA = +25 C, LO = 0 dBm, RF Frequency = 900 MHz, IF Frequency = 71 MHz, LO Frequency = 829 MHz, Unless Otherwise Noted) 10 10 4.75 V 5.00 V 5.25 V 9 –40 °C +25 °C +85 °C 9 8 7 Gain (dB) Gain (dB) 8 7 6 5 4 3 2 6 5 4 3 2 1 0 860 1 870 880 890 900 910 920 0 860 930 870 880 Frequency (MHz) Figure 3. Conversion Gain Over Frequency and Supply Voltage 910 930 –40 °C +25 °C +85 °C 18 Noise Figure (dB) 16 14 12 10 8 6 4 16 14 12 10 8 6 4 2 2 0 860 870 880 890 900 910 920 0 860 930 Frequency (MHz) 880 890 900 910 920 930 Figure 6. Noise Figure Over Frequency and Temperature +40 +40 4.75 V 5.00 V 5.25 V +39 +38 +37 –40 °C +25 °C +85 °C +39 +38 +37 IIP3 (dBm) +36 +35 +34 +33 +32 +36 +35 +34 +33 +32 +31 +30 870 Frequency (MHz) Figure 5. Noise Figure Over Frequency and Supply Voltage +31 860 870 880 890 900 910 920 930 Frequency (MHz) Figure 7. Input IP3 Over Frequency and Supply Voltage +30 860 870 880 890 900 910 920 Frequency (MHz) Figure 8. Input IP3 Over Frequency and Temperature Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 920 20 4.75 V 5.00 V 5.25 V 18 Noise Figure (dB) 900 Figure 4. Conversion Gain Over Frequency and Temperature 20 IIP3 (dBm) 890 Frequency (MHz) June 22, 2010 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210E 930 DATA SHEET • SKY42068-355LF ACTIVE MIXER +25 +25 4.75 V 5.00 V 5.25 V +23 +22 +21 +20 +19 +18 +17 +23 +22 +21 +20 +19 +18 +17 +16 +16 +15 –40 °C +25 °C +85 °C +24 IP1dB (dBm) IP1dB (dBm) +24 +15 860 870 880 890 900 910 920 930 860 870 880 Figure 9. Input P1dB Over Frequency and Supply Voltage Evaluation Board Description The SKY42068-355LF Evaluation Board is used to test the SKY42068-355LF mixer performance. The SKY42068-355LF Evaluation Board schematic diagram is shown in Figure 11. Figure 12 provides the Evaluation Board layout. The Bill of Materials (BOM) is provided in Table 5. 890 900 910 920 930 Frequency (MHz) Frequency (MHz) Figure 10. Input P1dB Over Frequency and Temperature enable the current limiting function of the power supply to 250 mA. 2. Connect a signal generator to the LO1 input port (J3). Set the generator to the desired LO frequency at a power level of 0 dBm, but do not enable. Circuit Design Configurations 3. Connect a signal generator to the mixer RF input port (J7). Set the generator to the desired RF frequency at a power level of 0 dBm, but do not enable. The following design considerations are general in nature and must be followed regardless of final use or configuration: 4. Connect a spectrum analyzer to the IF output port of the mixer (J6). 1. Paths to ground should be made as short as possible. 5. Enable the power supply. 2. The ground pad of the SKY42068-355LF mixer has special electrical and thermal grounding requirements. This pad is the main thermal conduit for heat dissipation. Since the circuit board acts as the heat sink, it must shunt as much heat as possible from the mixer. As such, design the connection to the ground pad to dissipate the maximum wattage produced to the circuit board. Multiple vias to the grounding layer are required. 6. Enable the LO signal. 3. Two external output bypass capacitors are required on the VDD pin. The values of these capacitors will change with respect to the desired RF frequency. One capacitor should be used for low frequency bypassing and the other capacitor for high frequency bypassing. Special attention should be given so that the smaller value capacitor does not go into self-resonance at the desired RF frequency. 4. The RF input must be driven differentially. A 1:1 impedance ratio balun is recommended with a center tap on the secondary side that is a DC path to ground. Mixer Testing Procedure Use the following procedure to set up the SKY42068-355LF Evaluation Board for mixer testing. Refer to Figure 13 for guidance: 1. Connect the SKY42068-355LF Evaluation Board (J1) to a +5 VDC power supply using insulated supply cables. If available, 7. Enable the RF signal and take measurements. 8. If LO2 is desired, connect the LO signal generator to the LO2 input port (J8) and pull the LO_SEL jumper (J2). Package Dimensions Figure 14 shows the package dimensions for the 20-pin QFN, and Figure 15 provides the tape and reel dimensions. Package and Handling Information Since the device package is sensitive to moisture absorption, it is baked and vacuum packed before shipping. Instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SKY42068-355LF is rated to Moisture Sensitivity Level 3 (MSL3) at 260 C. It can be used for lead or lead-free soldering. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. Production quantities of this product are shipped in a standard tape and reel format. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103210E • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 22, 2010 5 PRELIMINARY DATA SHEET • SKY42068-355LF VDD X 2 J2 3 VDD C9 12 pF J8 LO_2 In 4 C4 33 pF L2 0Ω SMA NC NC GND NC U1 SKY42068 LO_SEL NC GND IF+ LO_2 IF– C10 DNI GND C3 DNI 5 LO_1 6 7 8 9 15 14 13 J1 2-Pin Header X X VDD X 12 11 3 GND C11 DNI 16 RF– C1 DNI RF+ SMA 1 17 VDD 1 2 X 18 NC C2 33 pF L1 0Ω VDD J3 LO_1 In 19 GND 20 GND C6 1000 pF GND C5 33 pF 10 TB2 Balun TC4-1W LB2 27 nH LB4 0Ω 6 CB8 DNI 2 J6 IF Out SMA CB6 10 pF 4 6 J7 RF In LB1 12 nH LB3 0Ω SMA CB1 DNI CB7 DNI 1 2 TB1 Balun LDB31900M05C-417 3 CB4 1000 pF CB5 33 pF 1 RB1 5Ω 4 CB2 33 pF CB3 1000 pF S737 Figure 11. SKY42068-355LF Evaluation Board Schematic (900 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 103210E • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 22, 2010 DATA SHEET • SKY42068-355LF ACTIVE MIXER J4 CA1 J3 C1 L1 C11 LA1 CA7 LA2 LA3 TA1 CA4 RA1 CA2 CA3 C5 C6 LA4 CA6 J5 CA8 TA2 C2 CA5 C9 J2 C10 L2 C3 J8 J1 TB2 U1 CB5 C4 TB1 CB3 CB2 RB1 LB1 CB8 CB4 CB6 LB2 LB3 CB7 LB4 J6 CB1 J7 Component Placement Top Layer Layer 3 Layer 2 Bottom Layer S739 Figure 12. SKY42068-355LF Evaluation Board Assembly Diagram (900 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103210E • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 22, 2010 7 DATA SHEET • SKY42068-355LF ACTIVE MIXER Table 5. SKY42068-355LF Evaluation Board Component Values (900 MHz) Reference Designator Quantity Value C1, C3, C10, C11, CA1, CA2, CA3, CA4, CA5, CA6, CA7, CA8, CB1, CB7, CB8, J4, J5, LA1, LA2, LA3, LA4, RA1, TA1, TA2 24 DNI C2, C4, C5, CB2, CB5 5 33 pF C6, CB3, CB4 3 1000 pF Manufacturer C9 1 12 pF CB6 1 10 pF J1 1 Two-pin header connector J2 1 Jumper J3, J6, J7, J8 4 SMA connector L1, L2, LB3, LB4 4 0 LB1 1 12 nH LB2 1 27 nH Part Number RB1 1 5 TB1 1 1:1 (800-1000 MHz) Murata LDB31900M05C-417 TB2 1 4:1 (3-800 MHz) Mini-Circuits TC4-1W U1 1 – Skyworks SKY42068-355LF-11 Power Supply Signal Generator LO1 LO2 50 Ω VDD GND IF Spectrum Analyzer SKY42068 Evaluation Board RF Signal Generator S738 Figure 13. SKY42068-355LF Evaluation Board Mixer Testing Configuration Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 June 22, 2010 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210E DATA SHEET • SKY42068-355LF ACTIVE MIXER A 5.00 Index Area (2.50 x 2.50) C 0.20 Ref 3.15 +0.10/–0.15 Seating Plane 0.02 +0.03/–0.02 2.50 1.575 +0.050/–0.075 B Detail A (4 places) 20 x 0.55 +0.10/–0.10 0.65 5.00 B 3.15 +0.10/–0.15 2.50 Index Area (2.50 x 2.50) 1.575 +0.050/–0.075 0.90 ± 0.10 0.15 C 2x 2x A 20 x 0.30 ± 0.05 0.10 M A B C 0.05 M C 0.08 C 20x 0.10 C 3 Top View Side View Bottom View 1.30 0.65 Detail A All dimensions are in millimeters S745 Figure 14. SKY42068-355LF 20-Pin QFN Package Dimensions 4.00 φ1.50 +0.1/–0.0 8.00 0.30 ± 0.05 2.00 ± 0.05 φ1.50 Min A 1.75 ± 0.10 R0.30 Max 5.50 ± 0.05 12.0 ± 0.30 5.25 1.10 A 5.25 0.25 Section A-A R0.25 Notes: 1. Carrier tape: black conductive polycarbonate or polystyrene. 2. Cover tape material: transparent conductive PSA. 3. All dimensions are in millimeters. S379 Figure 15. SKY42068-355LF 20-Pin QFN Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 103210E • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • June 22, 2010 9 DATA SHEET • SKY42068-355LF ACTIVE MIXER Ordering Information Model Name SKY42068-355LF Active Mixer Manufacturing Part Number SKY42068-355LF-355LF Evaluation Kit Part Number TW12-D761 Copyright © 2006, 2008, 2010 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. 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Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 June 22, 2010 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210E