digital attenuator 32.0 db, 2 - bit, ttl driver, dc - 2.0 ghz rev. v9 at - 273 - pin 1 1 m/a - com technology solutions inc. (macom) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. visit www.macom.com for additional data sheets and product information. for further information and support please visit: https://www.macom.com/support 1 features ? attenuation: 16.0 db steps to 32 db ? low dc power consumption ? hermetic surface mount package ? integral ttl driver ? 50 ohm impedance ? temperature stability: 0.18 db from - 55c to +85 c typ. ? tape and reel packaging available ? lead - free cr - 11 package ? 260c reflow compatible ? rohs* compliant description m/a - com's at - 273 - pin is a gaas fet digital attenuator with a 16.0 db minimum step size and a 32 db total attenuation range. this attenuator and integral ttl driver is in a hermetically sealed ceramic 16 - lead surface mount package. the at - 273 - pin is ideally suited for use where accuracy, fast switching, very low power consumption and low intermodulation products are required. typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits. environmental screening is available. contact the factory for information. ordering information part number package at - 273 - pin bulk packaging note: reference application note m513 for reel size information. pin configuration pin no. function pin no. function 1 c2 9 rf1 2 gnd 10 gnd 3 c1 11 gnd 4 gnd 12 gnd 5 gnd 13 vee 6 gnd 14 vcc 7 gnd 15 nc 8 rf2 16 nc * restrictions on hazardous substances, european union directive 2002/95/ec. the metal bottom of the case must be connected to rf and dc ground. functional schematic 1 1. use the c1 control for a single 16 - db bit. rf1 gnd gnd gnd vee vcc rf2 gnd gnd gnd gnd 16 db 16 db c1 gnd orientation mark c2 pin 1 nc pin 16 nc
digital attenuator 32.0 db, 2 - bit, ttl driver, dc - 2.0 ghz rev. v9 at - 273 - pin 2 2 m/a - com technology solutions inc. (macom) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. visit www.macom.com for additional data sheets and product information. for further information and support please visit: https://www.macom.com/support 2 electrical specifications: t a = 25 c 1 ,2 parameter frequency units min typ max test conditions insertion loss dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz db db db 1.6 1.7 1.9 attenuation accuracy dc - 2.0 ghz dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz 3% of attenuation setting in db 3% of attenuation setting in db 3% of attenuation setting in db, - 1 db 3% of attenuation setting in db, - 3 db c1 bit full attenuation (32 db) full attenuation (32 db) full attenuation (32 db) vswr dc - 2.0 ghz ratio 1.6:1 full range trise, tfall ns 7 10% to 90% ton, toff ns 28 50% cntl to 90% / 10% rf transients mv 30 in - band (peak - to - peak) 1 db compression 0.05 ghz 0.5 - 2.0 ghz dbm dbm +20 +28 input power input power input ip3 0.05 ghz 0.5 - 2.0 ghz dbm dbm +38 +48 two - tone inputs up to +5 dbm input ip2 0.05 ghz 0.5 - 2.0 ghz dbm dbm +44 +68 two - tone inputs up to +5 dbm vcc - vee v v 4.5 - 8.0 5.0 5.5 - 5.0 vctl vctl logic (0) ttl logic (1) ttl v v 0.0 2.0 0.8 5.0 input leakage current (low) input leakage current (high) 0 to 0.8v 2.0 to 5.0v a a 1.0 1.0 icc vcc = 4.5 to 5.5v vctl = 0 to 0.8v, or vcc C 2.1v to vcc ma 2.0 - iee vee = - 5.0 to - 8.0v ma - 1 1. all specifications apply when operated with bias voltages of +5v for vcc and C 5.0v for vee. 2. this attenuator is guaranteed monotonic.
digital attenuator 32.0 db, 2 - bit, ttl driver, dc - 2.0 ghz rev. v9 at - 273 - pin 3 3 m/a - com technology solutions inc. (macom) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. visit www.macom.com for additional data sheets and product information. for further information and support please visit: https://www.macom.com/support 3 handling procedures please observe the following precautions to avoid damage: static sensitivity gallium arsenide integrated circuits are sensitive to electrostatic discharge (esd) and can be damaged by static electricity. proper esd control techniques should be used when handling these devices. truth table (digital attenuator ) c1 c2 attenuation 0 0 loss, reference 0 1 16.0 db 1 1 3 2 .0 db 0 = ttl low; 1 = ttl high typical performance curves attenuation accuracy vs. frequency ref. insertion loss vs. frequency vswr vs. frequency absolute maximum ratings 3,4 parameter absolute maximum max. input power 0.05 ghz 0.5 - 2.0 ghz +27 dbm +34 dbm v cc - 0.5v v cc +7.0v v ee - 8.5v v ee +0.5v v cc - v ee - 0.5v v cc - v ee 14.5v vin 5 - 0.5v vin v cc + 0.5v operating temperature - 55 c to +125c storage temperature - 65 c to +150c 3. exceeding any one or combination of these limits may cause permanent damage to this device. 4. m/a - com does not recommend sustained operation near these survivability limits. 5. standard cmos ttl interface, latch - up will occur if logic signal is applied prior to power supply. 0 1 2 3 4 5 0.0 0.5 1.0 1.5 2.0 2.5 3 fre que ncy (ghz ) loss (db) + 85 c + 25 c - 55 c -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 fre que ncy (ghz ) deviation from nominal atten (db) f ull a t t enuat io n 16 d b b it 1.00 1.20 1.40 1.60 1.80 2.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 fre que ncy (ghz ) vswr 16 d b st at e 3 2 d b st at e f ull a t t enuat io n
digital attenuator 32.0 db, 2 - bit, ttl driver, dc - 2.0 ghz rev. v9 at - 273 - pin 4 4 m/a - com technology solutions inc. (macom) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. visit www.macom.com for additional data sheets and product information. for further information and support please visit: https://www.macom.com/support 4 lead - free, cr - 11 ceramic package ? ? reference application note m538 for lead - free solder reflow recommendations.
digital attenuator 32.0 db, 2 - bit, ttl driver, dc - 2.0 ghz rev. v9 at - 273 - pin 5 5 m/a - com technology solutions inc. (macom) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. visit www.macom.com for additional data sheets and product information. for further information and support please visit: https://www.macom.com/support 5 m/a - com technology solutions inc. all rights reserved. information in this document is provided in connection with m/a - com technology solutions inc ("macom") products. these materials are provided by macom as a service to its customers and may be used for informational purposes only. except as provided in macom's terms and conditions of sale for such products or in any separate agreement related to this document, macom assumes no liability whatsoever. macom assumes no responsibility for errors or omissions in these materials. macom may make changes to specifications and product descriptions at any time, without notice. macom makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its specifications and product descriptions. no license, express or implied, by estoppels or otherwise, to any intellectual property rights is granted by this document. these materials are provided "as is" without warranty of any kind, either express or implied, relating to sale and/or use of macom products including liability or warranties relating to fitness for a particular purpose, consequential or incidental damages, merchantability, or infringement of any patent, copyright or other intellectual property right. macom further does not warrant the accuracy or completeness of the information, text, graphics or other items contained within these materials. macom shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost revenues or lost profits, which may result from the use of these materials. macom products are not intended for use in medical, lifesaving or life sustaining applications. macom customers using or selling macom products for use in such applications do so at their own risk and agree to fully indemnify macom for any damages resulting from such improper use or sale.
|
