SKY42068

PRELIMINARY DATA SHEET SKY42068: 400-1000 MHz High Dynamic Range Active Mixer Applications • GSM/EDGE/CDMA/AMPS/TETRA • Mobile radio systems • Industrial, Scientific, Medical (ISM) band applications Description The SKY42068 is an integrated, high-dynamic range low-noise 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. The 20-pin Quad Flat No-Lead (QFN) device package and pinout are shown in Figure 1. Figure 2 shows a functional block diagram for the SKY42068. Skyworks offers lead (Pb)-free, RoHS (Restriction of Hazardous Substances) compliant packaging. Features • High, 3rd Order Input Intercept Point (IIP3) mixer • Wideband RF input frequency range (400 to 1000 MHz) • CMOS-compatible control interface • +5 V supply operation • –40 °C to +85 °C operating range • Supports frequency hopping applications • QFN (20-pin, 5 x 5 mm) Pb-free package (MSL3, 260 °C per JEDEC J-STD-020) GND 20 19 18 17 16 LO_1 GND LO_SEL GND LO_2 GND VDD NC NC 1 2 3 4 5 15 14 13 12 11 NC NC NC IF+ IF– LO_1 IF RF RF Balun 6 7 8 9 10 LO_2 GND GND RF+ RF– GND S326 LO_SEL S325 Figure 1. SKY42068 Pinout – 20-Pin QFN (Top View) Figure 2. SKY42068 Block Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 103210C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 23, 2006 1 PRELIMINARY DATA SHEET • SKY42068 ACTIVE MIXER Table 1. SKY42068 Signal Descriptions Pin # 1 2 3 4 5 6 7 8 9 10 LO_1 GND LO_SEL GND LO_2 GND GND RF+ RF– GND Name Description Local oscillator 1 input Ground Select control for LO_1 and LO_2 Ground Local oscillator 2 input Ground Ground Positive RF input Negative RF input Ground Pin # 11 12 13 14 15 16 17 18 19 20 IF– IF+ NC NC NC GND NC NC GND VDD Name Description Negative IF output Positive IF output No connection No connection No connection Ground No connection No connection Ground Supply voltage Table 2. SKY42068 Absolute Maximum Ratings Parameter Positive DC power supply Power dissipation Input power Thermal resistance Operating case temperature Storage case temperature Note: Symbol VDD PD PIN RTH TOPR TSTG Minimum Typical Maximum 5.5 1.7 22 Units V W dBm °C/W °C °C 25 –40 –40 +85 +125 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. Table 3. SKY42068 Recommended Operating Conditions Parameter Positive DC supply voltage Power dissipation Operating case temperature VDD PD TOPR –40 Symbol Minimum 4.75 Typical 5.0 1.1 +85 Maximum 5.25 Units V W °C Functional Description The SKY42068 consists of a high dynamic active mixer, LO amplifiers, and a selectable LO input. The SKY42068 was specifically designed to meet the needs of high performance receivers. 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. Electrical and Mechanical Specifications Signal pin assignments and functional pin descriptions are described in Table 1. The absolute maximum ratings of the SKY42068 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 August 23, 2006 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210C PRELIMINARY DATA SHEET • SKY42068 ACTIVE MIXER Table 4. SKY42068 Electrical Specifications (voltage supply = +5 V, TC = +25 °C, LO = 0 dBm, RF frequency = 900 MHz, IF frequency = 71 MHz, unless otherwise noted) Parameter RF RF input frequency RF input VSWR (Note 1) Mixer (Note 2) Conversion gain Single side band noise figure Input IP3 RF to IF leakage (Note 3) LO to IF leakage Input –1 dB compression point 2x2 product suppression (Note 4) Local Oscillator LO input frequency (Note 5) LO input VSWR (Note 1) LO level input LO1 to LO2 isolation Intermediate Frequency IF output frequency IF output VSWR (Note 1) 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. Symbol Test Condition Min Typical Max Units 400 1.5:1 1000 2.0:1 MHz 2.5 9.5 1 MHz tone spacing 36 –40 –25 +14 +17 –70 dB dB dBm dBm dBm dBm dBc 450 1.5:1 –5 40 0 1200 2.0:1 +5 MHz dBm dB 50 IF = 50 MHz to 200 MHz 1.5:1 250 2.0:1 MHz Note 1: In a 50 Ω system obtained with external matching components on input/output ports. Evaluation Board Description The SKY42068 Evaluation Board is used to test the SKY42068 mixer performance. The SKY42068 Evaluation Board schematic diagram is shown in Figure 3. Figure 4 displays the Evaluation Board layout. The Bill of Materials (BOM) is provided in Table 5. Circuit Design Configurations The following design considerations are general in nature and must be followed regardless of final use or configuration: 1. Paths to ground should be made as short as possible. 2. The ground pad of the SKY42068 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. 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 Evaluation Board for mixer testing. Refer to Figure 5 for guidance: 1. Connect the SKY42068 Evaluation Board (J1) to a +5 VDC power supply using insulated supply cables. If available, enable the current limiting function of the power supply to 250 mA. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 103210C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 23, 2006 3 PRELIMINARY DATA SHEET • SKY42068 ACTIVE MIXER 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. 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. 4. Connect a spectrum analyzer to the IF output port of the mixer (J6). 5. Enable the power supply. 6. Enable the LO signal. 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 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 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. For packaging details, refer to the Skyworks Application Note, Tape and Reel, document number 101568. Package Dimensions Figure 6 shows the package dimensions for the 20-pin QFN and Figure 7 provides the tape and reel dimensions. Electrostatic Discharge (ESD) Sensitivity The SKY42068 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions. VDD C5 33 pF J3 LO_1 In SMA C1 DNI J2 C6 1000 pF 20 19 18 X 17 X 16 1 2 VDD L1 0Ω C11 DNI C2 33 pF 1 VDD GND NC NC GND LO_1 GND LO_SEL GND LO_2 NC NC 15 J1 2-Pin Header X 2 14 X VDD J8 LO_2 In SMA C3 DNI C10 DNI C9 12 pF L2 0Ω C4 33 pF 3 U1 SKY42068 NC IF+ IF– 13 X VDD 4 5 12 11 3 GND GND GND RF+ TB2 Balun TC4-1W 6 LB2 27 nH CB8 DNI CB6 10 pF LB4 0Ω J6 IF Out SMA RF– 6 7 8 9 10 2 4 J7 RF In SMA CB1 DNI 6 LB1 12 nH CB7 DNI LB3 0Ω TB1 Balun LDB31900M05C-417 1 2 3 CB4 1000 pF 1 CB5 33 pF RB1 5Ω CB2 33 pF 4 CB3 1000 pF S737 Figure 3. SKY42068 Evaluation Board Schematic (900 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 4 August 23, 2006 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210C PRELIMINARY DATA SHEET • SKY42068 ACTIVE MIXER J4 CA1 J3 C1 L1 C11 C9 RA1 CA2 CA3 C5 C6 C2 LA1 CA7 LA2 LA3 TA1 CA4 LA4 CA6 J5 CA8 TA2 CA5 J2 C10 L2 C3 C4 TB2 U1 TB1 CB3 CB2 RB1 LB1 CB5 CB8 CB4 CB6 LB2 LB3 CB7 LB4 CB1 J1 J8 J6 J7 Component Placement Top Layer Layer 2 Layer 3 Bottom Layer S739 Figure 4. SKY42068 Evaluation Board Assembly Diagram (900 MHz) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 103210C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 23, 2006 5 PRELIMINARY DATA SHEET • SKY42068 ACTIVE MIXER Table 5. SKY42068 Evaluation Board Component Values (900 MHz) Reference Designator C1, C3, C10, C11, CA1, CA2, CA3, CA4, CA5, CA6, CA7, CA8, CB1, CB7, CB8, J4, J5, LA1, LA2, LA3, LA4, RA1, TA1, TA2 C2, C4, C5, CB2, CB5 C6, CB3, CB4 C9 CB6 J1 J2 J3, J6, J7, J8 L1, L2, LB3, LB4 LB1 LB2 RB1 TB1 TB2 U1 Quantity 24 DNI Value Manufacturer Part Number 5 3 1 1 1 1 4 4 1 1 1 1 1 1 33 pF 1000 pF 12 pF 10 pF Two-pin header connector Jumper SMA connector 0Ω 12 nH 27 nH 5Ω 1:1 (800-1000 MHz) 4:1 (3-800 MHz) – Murata Mini-Circuits Skyworks LDB31900M05C-417 TC4-1W SKY42068-11 Power Supply Signal Generator LO1 VDD GND IF Spectrum Analyzer LO2 50 Ω SKY42068 Evaluation Board RF Signal Generator Figure 5. SKY42068 Evaluation Board Mixer Testing Configuration S738 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 6 August 23, 2006 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210C PRELIMINARY DATA SHEET • SKY42068 ACTIVE MIXER Index Area (2.50 x 2.50) 5.00 2.50 A 0.20 Ref C 3.15 +0.10/–0.15 0.02 +0.03/–0.02 1.575 +0.050/–0.075 Detail A (4 places) Seating Plane B 20 x 0.55 +0.10/–0.10 2.50 5.00 B Index Area (2.50 x 2.50) 0.90 ± 0.10 0.15 C 2x 2x 0.10 C 3 0.08 C 20x 1.575 +0.050/–0.075 A 20 x 0.30 ± 0.05 0.10 M A B C 0.05 M C Top View Side View 1.30 0.65 Bottom View All dimensions are in millimeters Detail A 3.15 +0.10/–0.15 S745 0.65 Figure 6. SKY42068 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 5.25 0.25 A 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 7. SKY42068 20-Pin QFN Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 103210C • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • August 23, 2006 7 PRELIMINARY DATA SHEET • SKY42068 ACTIVE MIXER Ordering Information Model Name SKY42068 Active Mixer Manufacturing Part Number SKY42068-11 (Pb-free package) Evaluation Kit Part Number TW12-D761 Copyright © 2006, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. 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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 8 August 23, 2006 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103210C