skyworks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 200965b ? skywor ks proprietary i nformation ? products and product information are subject to change without notice ? january 24, 2011 1 data sheet sky12406 - 360lf : 50 - 600 mhz one - bit digital attenuator (12 db lsb) applications ? cellular radio ? wireless data ? wll gain level control circuits features ? positive voltage control : 0 /3 v ? high bit accuracy ? low loss ? absorptive in 50 w systems ? small, qf n ( 8 - pin, 2 x 2 mm) package (msl 1 , 260 c per jedec j - std - 020) figure 1. sky12406- 360lf block diagram description the sky12406 - 360lf is a phemt gaas fet i/c single bit attenuator designed for low - cost commercial applications where high attenuation accuracy, low insertion loss, and low intermodulation products are required . the attenuator has an lsb of 12 db. the sky12406 - 360lf is manufactured in a compact, 2 x 2 mm, 8 - pin exposed pad plastic quad flat no - lead (qfn) package . 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. SKY12406-360LF pinout ? 8- pin qfn ( top view) downloaded from: http:///
data sheet ? SKY12406-360LF one - bit digital attenuator skywor ks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 2 january 24, 2011 ? skyworks proprietary i nformation ? products and product information are subject to change without notice ? 200965b table 1. SKY12406-360LF signal desc riptions pin # name description pin # name description 1 rf 1 rf port 5 gnd ground 2 gnd ground 6 vctl2 dc control voltage 3 vctl1 dc control voltage 7 gnd ground 4 cbp rf ground. must be ac - coupled to ground. 8 rf2 rf port table 2. sky12406- 360lf abs olute maximum ratings parameter symbol minimum maximum units rf input power: 3 v @ 50 mhz 3 v @ 600 mhz p in +24 +27 dbm dbm operating temperature t op ? 40 +85 c storage temperature t stg ? 65 +150 c note: exposure to maximum rating conditions for extended perio ds may reduce device reliability. there is no damage to de vice 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 permane nt damage to the device. caution : although this device is designed to be as robust as possible, electrostatic dis charge (esd) can damage this device. this devi ce must be protected at all times from esd. static charges may easily produce potenti als of several kilovolts o n 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 sky12406 - 360lf are provided in table 2. e lectrical specifications are provided in table 3 . typical performance characteristics of the sky12406 - 360lf are illustrated in figures 3 through 6 . the state of the sky12406 - 360lf is determined by the logic provided in table 4 . downloaded from: http:///
data sheet ? SKY12406-360LF one - bit digital attenuator skyworks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 200965b ? skyworks proprietary i nformation ? products and product information are subject to change without notice ? january 24, 2011 3 table 3 . SKY12406-360LF electrical specifications (note 1) (v ctl = 0 /3 v , t op = +25 c, p in = 0 dbm, characteristic impedance [ z o ] = 50 , unless otherwise noted) parameter symbol test condition min typical max units insertion loss il 50 - 600 mhz 0. 3 0. 4 db attenuation attn 50 - 600 mhz 11.6 12.0 12.4 db return loss rl 50 - 600 mhz 15 20 db switching characteristics: rise/fall time on/off time 10/90% or 90/10% rf 50% v ctl to 90/10 % rf 7 8 35 35 ns ns input power for 0.1 db compression @ 50 mhz @ 600 mhz +18 +20 +22 +25 dbm dbm 3 rd order input intercept point iip3 two tone input power, +10 dbm/tone, 50 mhz, 1 mhz spacing t wo tone input power, +10 dbm/tone, 600 mhz +42 +44 +46 +50 dbm dbm control voltage: low high v ctl _ l v ctl _ h 0 2.7 0.2 3.3 v v control current i cc 10 50 a note 1 : performance is guaranteed only under the conditions listed in this table. typical performance characteristics (v ctl = 3 v, t op = +25 c, p in = 0 dbm, characteristic impedance [z o ] = 50 , cbp = 560 pf, blocking capacitor = 560 pf unless otherwise noted ) figure 3. typical insertion loss figure 4. typical attenuation downloaded from: http:///
data sheet ? SKY12406-360LF one - bit digital attenuator skywor ks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 4 january 24, 2011 ? skyworks proprietary i nformation ? products and product information are subject to change without notice ? 200965b figure 5. typical return loss (insertion loss sta te) figure 6. typical return loss (attenuation state) table 4 . sky12406- 360lf truth table vctl1 (pin 3) vctl2 (pin 6) rf1 to rf2 path 1 0 insertion loss 0 1 attenuation note : 1 = + 3 v. 0 = 0 v. any state other than that described in this table places the attenuator into an undefined state. evaluation board description the sky12406 - 360lf e valuation b oard is used to test the performance of the sky12406 - 360lf attenuator . an assembly drawing for the evaluation board is shown in figure 7 . dc bl ocks are required on rf1 (pin 1) and rf2 (pin 8). a blocking capacitor (cblk) of 560 pf and a bypass capacitor (cbp) of 560 pf are required for 50 mhz operation. package dimensions the pcb layout footprint for the sky12406 - 360lf is provided in figure 8 . ty pical case markings are shown in f igure 9 . package dimensions for the 8 - pin qfn are shown in figure 1 0 , and tape and reel dimensions are provided in figure 11 . package and handling information instructions on the shipping container label regarding exposu re 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 sky12406 - 360lf is rated to moisture sensitivity leve l 1 (msl 1 ) at 260 c. it can be used f or 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 . downloaded from: http:///
data sheet ? SKY12406-360LF one - bit digital attenuator skyworks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 200965b ? skyworks proprietary i nformation ? products and product information are subject to change without notice ? january 24, 2011 5 figure 7 . SKY12406-360LF evaluation board assembly diagram figure 8 . SKY12406-360LF pcb layout footprint downloaded from: http:///
data sheet ? SKY12406-360LF one - bit digital attenuator skywor ks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 6 january 24, 2011 ? skyworks proprietary i nformation ? products and product information are subject to change without notice ? 200965b figure 9 . typical case markings (top view) figure 10 . SKY12406-360LF 8- pin qfn package dimensions downloaded from: http:///
data sheet ? SKY12406-360LF one - bit digital attenuator skyworks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 200965b ? skyworks proprietary i nformation ? products and product information are subject to change without notice ? january 24, 2011 7 figure 11 . SKY12406-360LF tape and reel dimensions downloaded from: http:///
data sheet ? SKY12406-360LF one - bit digital attenuator skywor ks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworks inc.com ? www.skyworksinc.com 8 january 24, 2011 ? skyworks proprietary i nformation ? products and product information are subject to change without notice ? 200965b ordering information model name manufacturing part number evaluation board part number sky12406 - 360lf one - bit digital attenuator sky12406 - 360lf sky12406 - 360lf - evb copyright ? 2008, 2011 skyworks solutions, inc. all rights reserved. information in this document is provided in connection with sky works 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 informati onal purposes only by the customer. skyworks assumes no r esponsibility for errors or omissions in these materials or t he information contained herein. skyworks may change its doc umentation, products, services, specifications or produc t descriptio ns 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 futur e changes. no license, whether express, implied, by estoppel or otherw ise, is granted to any intellectual property rights by this document. skyworks assumes no liability for any materials, products or information provided hereunder, including the sale, distributio n, reproduction or use of skyworks products, informatio n or materials, except as may be provided in skyworks t erms and condit ions of sale. the materials, products and information are provided as is without warranty of any kind, whether express, implied, statutory, or otherwise, including fitness for a particular purpose or use, merchantability, performance, quality o r non - infr ingement of any intellectual property right; all such wa rranties are hereby expressly disclaimed. skyworks does not warrant the accuracy or comp leteness of the information, text, graphics or other items contained within these materials. skyworks shall not be liable for any damages, including but not limited to any special, indirect, incidental, statutory, or consequentia l damages, including without limitation, lost revenues or lost profits that may result from the use of the materials or information, whether or not the re cipient of materials has been advised of the possibility of such damage. skyworks products are not intended for use in medical, lifesaving or life - sustaining applications, or other equipment in which the failu re of the skyworks products could lead to personal injur y, death, physical or environmental damage. skyworks customer s using or selling skyworks products for use in such applic ations d o so at their own risk and agree to fully indemnify skyworks for any damages resulting from such imprope r use or sale. customers are responsible for their products and applicat ions using skyworks products, which may deviate from pu blished speci fications as a result of design defects, errors, or operation of products outside of published parameters or design spec ifications. customers should include design and operating saf eguards to minimize these and other risks. skyworks assu mes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of skyworks pro ducts outside of stated published specifications or parame ters. skyworks, the skyworks symbol, and breakthrough simplicity are t rademarks or registered trademarks of skyworks solutions, i nc., 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 informa tion, including relevant terms and conditions, posted at www .skyworksinc.com, are incorporated by reference. downloaded from: http:///
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