SKY12339-350LF-EVB

DATA SHEET SKY12339-350LF: 0.4-3.0 GHz 5-Bit Digital Attenuator (1 dB LSB) Applications • WiMAX, GSM, CDMA, WCDMA, WLAN, Bluetooth®, Zigbee®, and mobile radio base stations or terminal equipment • Telecommunications and instrumentation Features • Broadband operation: 0.4 to 3.0 GHz • Attenuation: 31 dB • LSB attenuation: 1 dB • Low insertion loss: 1.2 dB @ 900 MHz • Positive voltage operation: 4.5 to 5.5 V • Low current consumption: 1.5 mA typical @ 5 V • Small, QFN (16-pin, 3 x 3 mm) package (MSL1, 260 °C per JEDEC J-STD-020) Figure 1. SKY12339-350LF Block Diagram Description The SKY12339-350LF is a monolithic, GaAs binary-weighted fivebit single positive control voltage digital attenuator. The device operates from 0.4 to 3.0 GHz. DC power consumption is very low, typically 1.5 mA, with a supply voltage of 5 V. The SKY12339-350LF has an LSB of 1 dB and total attenuation of 31 dB. The two RF ports are bilateral; each can be used as the RF input or the RF output. An external supply voltage of 4.5 to 5.5 V is required. The SKY12339-350LF is comprised of five cascaded fixed attenuators, each of which has a shunt bypass switch. Beginning at the 1 dB LSB, each succeeding fixed attenuator produces twice the attenuation of the preceding stage. The state of each bypass switch is controlled by the logic level voltage applied to the associated control voltage input. A logic high voltage closes the associated switch, which bypasses that fixed attenuator stage; a logic low opens the switch to force the input signal to that stage through the associated attenuator. A functional block diagram is shown in Figure 1. The pin configuration and package are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201143C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 17, 2011 1 DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Figure 2. SKY12339-350LF Pinout – 16-Pin QFN (Top View) Table 1. SKY12339-350LF Signal Descriptions Pin # Note: Name Description Pin # Name Description 1 VS Supply voltage 9 GND Ground 2 RF1 RF input/output. A DC block is required. 10 N/C No connection 3 N/C No connection 11 RF2 RF input/output. A DC block is required. 4 GND Ground 12 V5 Control voltage input for 16 dB weighted bit 5 GND Ground 13 V4 Control voltage input for 8 dB weighted bit 6 GND Ground 14 V3 Control voltage input for 4 dB weighted bit 7 GND Ground 15 V2 Control voltage input for 2 dB weighted bit 8 GND Ground 16 V1 Control voltage input for 1 dB weighted bit Exposed paddle must be grounded. Electrical and Mechanical Specifications The absolute maximum ratings of the SKY12339-350LF are provided in Table 2. Electrical specifications are provided in Table 3. The state of the SKY12339-350LF is determined by the logic provided in Table 4. Typical performance characteristics of the SKY12339-350LF are illustrated in Figures 3 through 9. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 January 17, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201143C DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Table 2. SKY12339-350LF Absolute Maximum Ratings Parameter RF input power: @3V @5V Symbol Minimum Typical Maximum Units PIN +31 +33 dBm dBm Supply voltage VS 4.5 5.5 V Control voltage VCTL –0.2 VS V Operating temperature TOP –40 +85 °C Storage temperature TSTG –65 +150 °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. Table 3. SKY12339-350LF Electrical Specifications (Note 1) (VS = 5 V, VCTL = 0 to 3 V, TOP = +25 °C, PIN = 0 dBm, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted) Parameter Insertion loss Symbol IL Test Condition Min 0.4 to 1.0 GHz 1.0 to 2.0 GHz 2.0 to 3.0 GHz Attenuation range Typical Max Units 1.2 1.5 2.0 1.6 1.9 2.6 dB dB dB 31 dB ±(0.35 + 3% of attenuation setting) ±(0.30 + 3% of attenuation setting) ±(0.30 + 3% of attenuation setting) ±(0.30 + 6% of attenuation setting) dB dB dB dB 0.4 to 1.0 GHz 1.0 to 3.0 GHz 7 7 dB dB 50/90% or 10/90% RF 50/10% or 90/10% RF 50 20 ns ns IP0.1dB @ 1800 MHz +25 dBm 3 Order Input Intercept Point IIP3 Worst case for all attenuation states. For two-tone input power, +5 dBm/tone, 1800 MHz spacing +39 dBm Supply voltage VS Supply current IS Control voltage: High Low VCTL Control port current ICTL Attenuation accuracy Attenuation referred to insertion loss, all attenuation states 0.4 to 1.0 GHz 1.0 to 2.0 GHz 2.0 to 3.0 GHz (1-16 dB) 2.0 to 3.0 GHz (17-31 dB) Return loss |S11|, |S22| Switching characteristics: On/rise time Off/fall time Input power for 0.1 dB compression rd Worst case for all attenuation states 4.5 5.0 1.5 1.0 VCTL = low VCTL = high 2.7 –0.2 VCTL = low VCTL = high 5.5 15 5 V mA mA VS +0.2 V V 100 20 μA μA Note 1: Performance is guaranteed only under the conditions listed in this Table. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201143C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 17, 2011 3 DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Typical Performance Characteristics (VS = 5 V, VCTL = 0 to 3 V, TOP = +25 °C, CBLK = 39 pF, PIN = 0 dBm, Characteristic Impedance [ZO] = 50 Ω, , Unless Otherwise Noted) Figure 3. Insertion Loss vs Frequency (0 dB State) Figure 4. Input Return Loss vs Frequency Figure 5. Output Return Loss vs Frequency Figure 6. Attenuation vs Frequency Figure 7. Attenuation vs Frequency, Normalized to 0 dB State Figure 8. Attenuation Error vs Frequency Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 4 January 17, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201143C DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Figure 9. Attenuation Error vs Attenuation State, (f = 1.8 GHz) Table 4. SKY12339-350LF Truth Table RF1/RF2 (Pins 2 & 11) Attenuation V1 (Pin 16) V2 (Pin 15) V3 (Pin 14) V4 (Pin 13) V5 (Pin 12) Insertion loss 1 1 1 1 1 1.0 dB 0 1 1 1 1 2.0 dB 1 0 1 1 1 4.0 dB 1 1 0 1 1 8.0 dB 1 1 1 0 1 16 dB 1 1 1 1 0 31 dB 0 0 0 0 0 Note: “1” = +2.7 V to VS. “0” = –0.2 V to +0.2 V. This Table shows the logic required for the major bits and full attenuation. Bit states need to be used in combination to set the sum of the bits selected. Evaluation Board Description Package and Handling Information The SKY12339-350LF Evaluation Board is used to test the performance of the SKY12339-350LF digital attenuator. An assembly drawing for the Evaluation Board is shown in Figure 10 and an Evaluation Board schematic diagram is shown in Figure 11. Table 5 provides the Bill of Materials (BOM) list for Evaluation Board components. 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. Package Dimensions The PCB layout footprint for the SKY12339-350LF is shown in Figure 12. Typical case markings are noted in Figure 13. Package dimensions for the 16-pin QFN are shown in Figure 14, and tape and reel dimensions are provided in Figure 15. THE SKY12339-350LF is rated to Moisture Sensitivity Level 1 (MSL1) at 260 °C. It can be used for lead or lead-free soldering. For additional information, refer to the Skyworks Application Note, Solder Reflow Information, document number 200164. 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 • sales@skyworksinc.com • www.skyworksinc.com 201143C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 17, 2011 5 DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Figure 10. SKY12339-350LF Evaluation Board Assembly Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 6 January 17, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201143C DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Figure 11. SKY12339-350LF Evaluation Board Schematic Diagram Table 5. SKY12339-350LF Evaluation Board Bill of Materials Component Value Size Manufacturer/Part Series C1, C2 39 pF 0402 Murata GRM C9 39 pF 0402 Murata GRM C10 39 pF 0402 Murata GRM C11 39 pF 0402 Murata GRM C12 39 pF 0402 Murata GRM C13 39 pF 0402 Murata GRM C14 39 pF 0402 Murata GRM C15 39 pF 0402 Murata GRM C16 39 pF 0402 Murata GRM R1 0Ω 0402 Panasonic R2 0Ω 0402 Panasonic R3 0Ω 0402 Panasonic R4 0Ω 0402 Panasonic R5 0Ω 0402 Panasonic J1 SMA PCB adaptor – 0402 – J2 SMA PCB adaptor – 0402 – Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201143C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 17, 2011 7 DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Figure 12. SKY12339-350LF PCB Layout Footprint Figure 13. Typical Part Markings Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 8 January 17, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201143C DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Figure 14. SKY12339-350LF 16-Pin QFN Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201143C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 17, 2011 9 DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Figure 15. SKY12339-350LF Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 10 January 17, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201143C DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR Ordering Information Model Name SKY12339-350LF Digital Attenuator Manufacturing Part Number SKY12339-350LF Evaluation Board Part Numbers SKY12339-350LF-EVB Copyright © 2009, 2010, 2011 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. 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