hrf-at4521 31.0 db, dc - 2.5ghz, 5 bit serial digital attenuator the honeywell hrf-at4521 is a 5-bit digital attenuator that is ideal for use in broadband communication system applications that require accuracy, speed and low power consumption. the hrf-at4521 is manufactured with honeywell's patented s ilicon on insulator (s oi) cmos manufacturing technology, which provides the performance of gaas with the economy and integration capabilities of conventi onal cmos. these attenuators are dc coupled to improve lower operating frequency, frequency response and reduce the number of dc bias points required. features ? very low dc power consumption ? attenuation in steps from 1 db to 31 db ? single positive power supply voltage ? serial data interface ? 50 ohm impedance ? dc-coupled, bi-directional rf path ? space saving vqfn surface mount packaging ? lead-free, rohs compliant and green rf electrical specifications @ + 25 o c results @ v dd = 5.0 +/- 10%, v ss = 0 unless otherwise stated, z 0 = 50 ohms contact honeywell for relative performance at other supply configurations parameter test condition frequency minimum typical maximum units insertion loss 1.0 ghz 2.0 ghz 2.5 ghz 2.0 2.2 2.8 2.6 2.8 3.4 db db db 1db compression v ss = 0v, input power v ss = - 3v, input power 2.0 ghz 2.0 ghz 22 28 dbm dbm input ip3 v ss = 0v two-tone inputs, up to +5 dbm @ 0 dbm attenuation 2.0 ghz 36 dbm input ip3 v ss = -3v two-tone inputs, up to + 5 dbm @ 0 dbm attenuation 2.0 ghz >36 dbm return loss any combination of bits -11 -13 db attenuation accuracy all attenuation states all attenuation states all attenuation states 1.0 ghz 2.0 ghz 2.5 ghz + (0.25 + 2.5 %), - (0.10 + 5.0 %) + 0.45, - (0.20 + 8.0 %) + 0.35, - (-0.40 + 10.5%) db db db trise, tfall ton, toff (tpd) 10% to 90% 50% cntl to 90%/10%rf 10 15 ns ns t clock period (tprd) t high / t low = ? minimum clock period 50 ns t data set up (tsup) set up to rising edge of clock 5 ns t data hold (thld) data hold after rising edge of clock 2 ns t latch set up (tlsup) data set up to rising edge of oe 5 ns note 1 - for higher accuracy designs, please consider hrf-at4610/hrf-at4611 hr f - at4521 in vqfn packa g e
hrf-at4521 2 www.honeywell.com/microwave functional schematic dc electrical specifications @ + 25c parameter minimum typical maximum units v dd 3.3 1 5.0 5.5 v v ss -5.0 v i dd <5.0 50 ua cmos logic level (0) 0 0.8 v cmos logic level (1) v dd ? 0.8 v dd v input leakage current 10 ua note 1, the performance curves are for v dd = +5.0 +/- 10% absolute maximum ratings 1 parameter absolute maximum units input power + 35 dbm v dd +6.0 v v ss -5.5 v esd voltage 2 400 v operating temperature -40 to +85 o c storage temperature -65 to +125 o c moisture sensitivity level level 3 @ 260 o c digital inputs v dd +0.6 max to -0.6 min v note 1 - operation of this device beyond any of these parameters may cause permanent damage. note 2 - although the hrf-at4521 contains esd protection circuitr y on all digital inputs, precautions should be taken to ensure that the absolute maximum ratings are not exceeded. latch-up: unlike conventional cmos digital attenuators, honeywell's hrf-at4521 is immune to latch-up. rf in rf out s4 s3 s0 s1 s2 16db 8db 4db 2db 1db esd, buffer, level shift
hrf- at4521 www.honeywell.com/microwave 3 pin configurations pin function pin function 1 vdd 9 ground 2 ground 10 rf output 3 rf input 11 ground 4 ground 12 vss 5 ground 13 ground 6 ground 14 oe 7 ground 15 clk 8 ground 16 data note : bottom ground plate must be grounded for proper rf performance. serial data load serial data is shifted into the register on the rising edge of clock, msb first. the state of ?oe? will not affect the shifting of data. the rising edge of the ?oe? signal will be the clock for the transfer of shifted data. latched new data occurs one prop delay after the rising edge of ?oe?. see t he electrical spec table for ac parameters. truth table s4 s3 s2 s1 s0 output 0 0 0 0 0 1 1 0 0 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 1 0 0 0 0 1 reference input 1 db 2 db 4 db 8 db 16 db 31 db operation: data on serial input d is clocked into internal r egisters on the low to high transition of the clock signal (ck). the register output is enabled when output enable (oe) is in the low state. "0" = cmos low, "1" = cmos high.
hrf-at4521 4 www.honeywell.com/microwave performance curves insertion loss typical at4521 reference insertion loss -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 frequency (ghz) insertion loss (db) - 40 c +25c + 85 c 3.3 v return loss typical at4521 input return loss -30 -25 -20 -15 -10 -5 0 0.0 0.5 1.0 1.5 2.0 2.5 frequency (ghz) return loss (db)
hrf- at4521 www.honeywell.com/microwave 5 step accuracy typical at4521 step accuracy -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 frequency (ghz) step accuracy (db) 1 db 2 db 4 db 8 db 31 db 16 db 8 db 1 db 31 db 2 db 4 db 16 db relative accuracy typical at4521 relative accuracy -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0 0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 frequency (ghz) relative accuracy (db) 1 db 2 db 4 db 8 db 16 db 31 db 31 db 16 db 8 db
hrf-at4521 6 www.honeywell.com/microwave package outline drawing green material set the ?gr attenuators have a green material set that c an withstand a maximum soldering temperature of 260 o c. lead finish the package leads are nickel palladium gold (nipdau). the configuration being manuf actured and delivered today is lead-free rohs compliant. compliant packages have half-et ch leadframes and have date codes of 0300 or greater. lead free qfn surface mount application please see application note an310 for assembly process re commendations. the maximum soldering temperature of the -gr is 260 o c (-au attenuators are 250 o c). application notes can be found at our website: www.honeywell.com/microwave circuit application information these attenuators require a dc reference to ground. they may not operate properly when ac coupled on both the rf input and output without a dc ground reference provided as part of the circuit. see application note an311. notes 1. pin 1 identifier can be a combination or a dot and/or chamfer. 2. dimensions are in millimeters.
hrf- at4521 www.honeywell.com/microwave 7 evaluation circuit board honeywell's evaluation board provides an easy to use method of evaluating the rf performance of our attenuator. simply connect power, dc and rf signals to be measuring attenuator performance in less than 10 minutes. evaluation circuit board layout design details item description pcb impedance matched multi-layer fr4 attenuator hrf-at4521 digital attenuator chip capacitor panasonic model ecu-e1c103kbq capacitor, .01uf 0402 10% 16v rf connector johnson connectors model 142-0701-801 sma rf coaxial connector dc pin mil-max model 800-10-064-10-001 header pins ordering information ordering number delivery method units per shipment hrf-at4521-gr-tr hrf-at4521-gr-t hrf-at4521-e tape and reel tape evaluation board 2500 units per reel <2500 one board per box the new ?gr attenuators will replace and are fully back-compatible with the ?au attenuators. find out more for more information on honeywell?s micr owave products visit us online at www.honeywell.com/microwave or contact us at 800-323-8295 (763-954-2474 internationally). honeywell reserves the right to make changes to improve reliabi lity, function or design. honeywell does not assume any liabilit y arising out of the application or use of any product or circ uit described herein; neither does it conv ey any license under its patent rights nor t he rights of others. honeywell 12001 highway 55 plymouth, mn 55441 tel: 800-323-8295 www.honeywell.com/microwave form #4521w september 2007 ?2007 hone y well international inc. hrf-at4521 evaluation board hrf-at4521 evaluation board top view hrf-at4521 honeywell rf in rf out vdd vss gnd gnd data clk oe
|
