SKY12324-73LF

DATA SHEET SKY12324-73LF: 0.5-4.0 GHz Two-Bit Digital Attenuator (4 dB LSB) Applications • Cellular telephone base stations • Test instrumentation • Wireless data level control circuits Features • Four dB LSB steps to 12 dB • Single, positive control voltage per bit • Low insertion loss • Small SOT-6 package (MSL1, 260 °C per JEDEC J-STD-020) Figure 1. SKY12324-73LF Block Diagram Description The SKY12324-73LF is a two-bit GaAs pHEMT digital attenuator in a low-cost SOT-6 package. The two attenuation bits, 4 and 8 dB, can be independently switched into or out of the signal path according to the magnitudes of the control voltages applied to the two high impedance control voltage inputs. The RF ports are internally matched to 50 Ω and are fully bilateral. The SKY12324-73LF is ideally suited for use in applications where excellent attenuation accuracy, low insertion loss, and excellent intermodulation distortion performance are required. 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. Figure 2. SKY12324-73LF Pinout – 6-Pin SOT-6 (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200219E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 22, 2011 1 DATA SHEET • SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Table 1. SKY12324-73LF Signal Descriptions Pin # Name Description Pin # Name Description 1 J2 RF port. Must be DC blocked. 4 V1 DC control voltage. High input impedance control port for the 8 dB bit. The high control voltage applied to this pin must be within 0.2 V of the supply voltage applied to pin 3 or the part may be permanently damaged. The low control voltage is 0 V nominal. 2 GND RF ground. Must be AC-coupled to ground. 5 N/C No connect 3 J1 RF port. Must be DC blocked. 6 V2 DC control voltage. High input impedance control port for the 4 dB bit. The high control voltage applied to this pin must be within 0.2 V of the supply voltage applied to pin 3 or the part may be permanently damaged. The low control voltage is 0 V nominal. Table 2. SKY12324-73LF Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units RF input power (VCTL = 0/8 V) PIN +31 dBm Supply voltage VS 8 V Control voltage VCTL –0.2 +8.0 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. Electrical and Mechanical Specifications The absolute maximum ratings of the SKY12324-73LF are provided in Table 2. Electrical specifications are provided in Table 3. The state of the SKY12324-73LF is determined by the logic provided in Table 4. Typical performance characteristics of the SKY12324-73LF are illustrated in Figures 3 through 8. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 February 22, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200219E DATA SHEET • SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Table 3. SKY12324-73LF Electrical Specifications (Note 1) (VCTL = 0/3 V, VS = 3 V, TOP = +25 °C, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted) Parameter Insertion loss Symbol IL Test Condition (Note 2) Min 0.5 to 1.0 GHz 1.0 to 2.0 GHz 2.0 to 2.5 GHz 2.5 to 3.0 GHz 3.0 to 4.0 GHz Attenuation range Attenuation accuracy (Note 3) 0.5 to 1.0 GHz 1.0 to 3.0 GHz 3.0 to 4.0 GHz Typical Max Units 0.9 1.0 1.2 1.3 2.0 1.0 1.2 1.3 1.4 2.1 dB dB dB dB dB 12 dB ± (0.2 + 3% of attenuation setting) ± (0.3 + 5% of attenuation setting) ± (0.4 + 5% of attenuation setting) dB dB dB Return loss (insertion loss state) RL 0.5 to 3.0 GHz 3.0 to 4.0 GHz 15 12 20 15 dB dB Return loss (attenuation state) RL 0.5 to 3.0 GHz 3.0 to 4.0 GHz 12 12 18 15 dB dB 10/90% or 90/10% RF 50% VCTL to 90/10% RF TRISE = 1 ns, bandwidth = 500 MHz 40 100 ns ns 50 mV +30 dBm +46 +44 dBm dBm Switching characteristics: Rise/fall On/off Video feedthrough 1 dB Input Compression Point IP1dB 900 MHz, VS = 3 V 3rd Order Input Intercept Point IIP3 For two-tone input, PIN = +15 dBm/tone: 1.0 GHz 3.0 GHz Supply voltage VS Control voltage VCTL VCTL = VLOW VCTL = VHIGH Control current ICTL VCTL = VLOW VCTL = VHIGH = 3 V VCTL = VHIGH = 5 V 3 5 V 0 VS – 0.2 0.2 VS + 0.2 V V 20 100 200 μA μA μA 10 50 100 Note 1: Performance is guaranteed only under the conditions listed in this Table. Table 4. SKY12324-73LF Truth Table Attenuation, J1 to J2 V1 (Pin 4, 4 dB) V2 (Pin 6, 8 dB) Insertion loss VHIGH VHIGH 4 dB VHIGH VLOW 8 dB VLOW VHIGH VLOW VLOW 12 dB Note: VHIGH = +3 V to +5 V; VLOW = VS ± 0.2 V All other conditions not recommended. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200219E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 22, 2011 3 DATA SHEET • SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Typical Performance Characteristics (VCTL = 0/3 V, VS = 3 V, TOP = +25 °C, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted) Figure 3. Insertion Loss vs Frequency Figure 5. 8 dB Attenuation vs Frequency Figure 7. Return Loss vs Frequency Figure 4. 4 dB Attenuation vs Frequency Figure 6. 12 Bit Attenuation vs Frequency Figure 8. Attenuation Accuracy vs Frequency Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 4 February 22, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200219E DATA SHEET • SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Evaluation Board Description Package and Handling Information The SKY12324-73LF Evaluation Board is used to test the performance of the SKY12324-73LF digital attenuator. An assembly drawing for the Evaluation Board is shown in Figure 9. A schematic diagram is shown in Figure 10. 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 SKY12324-73LF is provided in Figure 11. Figure 12 shows the package dimensions for the 6-pin SOT-6, and tape and reel dimensions are provided in Figure 13. THE SKY12324-73LF 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. Figure 9. SKY12324-73LF Evaluation Board Assembly Diagram Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200219E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 22, 2011 5 DATA SHEET • SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Figure 10. SKY12324-73LF Evaluation Board Schematic Diagram Figure 11. PCB Layout Footprint for the SKY12324-73LF Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 6 February 22, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200219E DATA SHEET • SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Figure 12. SKY12324-73LF 6-Pin SOT-6 Package Dimensions Figure 13. SKY12324-73LF Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200219E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 22, 2011 7 DATA SHEET • SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Ordering Information Model Name SKY12324-73LF Two-Bit Digital Attenuator Manufacturing Part Number SKY12324-73LF Evaluation Board Part Numbers SKY12324-73LF-EVB Copyright © 2002-2008, 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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Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. 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 • sales@skyworksinc.com • www.skyworksinc.com 8 February 22, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200219E