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cht4012 - 98f rohs compliant ref. : dscht40121069 - 10 mar 11 1 / 14 specifications subject to change without notice united monolithic semiconductors s.a.s. route dpartementale 128 - bp46 - 91401 orsay cedex france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 dc - 6ghz 6 - bit digital attenuator gaas monolithic microwave ic description the cht4012 - 98 f is a dc - 6ghz monolithic 6 bit digital attenuator with a lsb = 0.5db offering a high dynamic range and a high accuracy, the rms a mplitude error is typically as low as 0. 3 db. the circuit provides low insertion loss 2.5db associated to input and output return loss es better than 1 4 db. a cmos and ttl compatible interface is available on chip. the circuit is mainly dedicated to defence and space systems and is also well suited for a wide range of microwave applications and systems. the circuit is manufactured with a phe mt process, 0.25m gate length and electron beam gate lithography. it is available in chip form main features main characteristics tamb. = + 25c symbol parameter min typ max unit freq frequency range dc 6 ghz il insertion loss 2.5 db rms_att_er rms of attenuation error 0. 3 db rms_phivar rms of phase variation (0.1 to 6ghz) 1 frequency : 0.1ghz - 6ghz
cht4012 - 98f dc - 6ghz 6 - bit digital attenuator ref. : dscht40121069 - 10 mar 11 2 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 main characteristics tamb. = + 25c symbol parameter min typ max unit freq operating frequency dc 6 ghz il insertion loss 2.5 db s11 input return loss - 1 6 db s22 output return loss - 1 4 db p1db input power at 1db gain compression 20 dbm dyn dynamic 31.5 db lsb attenuator elementary step 0.5 db att_er attenuation error - 0.5/+0.5 db rms_att_er rms of attenuation error 0. 3 db phivar phase variation (0.1 to 6ghz) - 5 / +1 rms_phivar rms of phase variation (0.1 to 6ghz) 1 v+ positive supply voltage 5 v v - negative supply voltage - 5 - 4 v vctrl_l control voltage low level 0 0.4 v vctrl_h control voltage high level 2.4 7 v i_v+ positive supply dc current 5 ma i_v - negative supply dc current 5 ma these values are representative of measurements in test fixture
dc - 6ghz 6 - bit digital attenuator cht4012 - 98f ref. : dscht40121069 - 10 mar 11 3 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 definitions n: attenuator state index with 0 attenuation error (att_err) att_err(n)= db_s21 (n) - db_s21(0) C x n (db) the translation of att_err(i) from db to linear is given by: att_err_lin(n) = phase variation (phivar) phivar(n) = phase_s21(n) - phase_s21(0) () rms attenuation error (rms_att) rms_att = (db) rms phase variation (rms_phivar) rms_phivar = () absolute maximum ratings (1) tamb.= + 25c symbol parameter values unit v+ maximum positive bias voltage 8 v v - minimum negative bias voltage - 8 v ai ctrl voltage (vctrl _low, vctrl _high) - 2, 8 v pin maximum input power 23 dbm tj junction temperature 175 c ta operating temperature range - 40 to +85 c tstg storage temperature range - 55 to +1 50 c (1) operation of this device above anyone of these parameters may cause permanent damage. 63 0 2 )) ( _ _ 1 ( . 64 1 1 log 20 n n lin err att 64 )) var( ( 63 0 2 n n phi 20 ) ( _ 10 n err att
cht4012 - 98f dc - 6ghz 6 - bit digital attenuator ref. : dscht40121069 - 10 mar 11 4 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 typical on - wafer sij parameters at state 0 tamb.= +25c, v+ = +5v, v - = - 5v freq (ghz) s11 (db) phs11 () s12 (db) phs12 () s21 (db) phs21 () s22 (db) phs22 () 0.2 - 20.21 0.1 - 1.69 - 5.6 - 1.69 - 5.6 - 20.37 - 0.3 0.4 - 20.33 - 9.2 - 1.75 - 9.9 - 1.75 - 9.9 - 20.27 - 8.8 0.6 - 20.90 - 20.2 - 1.81 - 14.2 - 1.82 - 14.1 - 20.25 - 18.0 0.8 - 20.77 - 32.0 - 1.87 - 18.3 - 1.88 - 18.3 - 19.96 - 27.4 1.0 - 20.75 - 40.7 - 1.90 - 22.5 - 1.90 - 22.6 - 19.67 - 35.5 1.2 - 20.45 - 48.7 - 1.93 - 26.7 - 1.94 - 26.8 - 19.33 - 41.9 1.4 - 20.59 - 54.5 - 1.97 - 30.9 - 1.98 - 31.0 - 19.26 - 48.4 1.6 - 20.92 - 61.5 - 2.03 - 35.2 - 2.04 - 35.3 - 19.21 - 55.4 1.8 - 21.15 - 69.9 - 2.07 - 39.4 - 2.07 - 39.6 - 19.08 - 60.8 2.0 - 21.24 - 77.4 - 2.11 - 43.7 - 2.11 - 43.8 - 18.96 - 65.8 2.2 - 21.34 - 84.7 - 2.15 - 47.8 - 2.15 - 47.8 - 18.86 - 70.0 2.4 - 21.48 - 90.7 - 2.21 - 52.0 - 2.21 - 52.1 - 18.60 - 74.1 2.6 - 21.80 - 94.9 - 2.25 - 56.1 - 2.25 - 56.3 - 18.46 - 78.1 2.8 - 22.62 - 100.6 - 2.30 - 60.3 - 2.30 - 60.4 - 18.30 - 81.8 3.0 - 23.17 - 106.8 - 2.35 - 64.5 - 2.35 - 64.6 - 18.26 - 84.9 3.2 - 23.97 - 113.1 - 2.40 - 68.7 - 2.40 - 68.7 - 18.19 - 88.0 3.4 - 24.56 - 120.1 - 2.44 - 72.8 - 2.44 - 72.9 - 17.92 - 90.8 3.6 - 25.40 - 123.3 - 2.49 - 76.9 - 2.49 - 76.9 - 17.75 - 93.7 3.8 - 26.78 - 125.4 - 2.54 - 81.0 - 2.54 - 81.1 - 17.59 - 95.7 4.0 - 28.80 - 125.6 - 2.59 - 85.1 - 2.60 - 85.2 - 17.52 - 97.8 4.2 - 31.95 - 128.2 - 2.62 - 89.3 - 2.63 - 89.3 - 17.34 - 99.0 4.4 - 35.79 - 128.9 - 2.69 - 93.4 - 2.69 - 93.5 - 17.22 - 100.4 4.6 - 42.02 - 100.1 - 2.74 - 97.6 - 2.72 - 97.6 - 17.00 - 101.1 4.8 - 42.57 - 39.9 - 2.79 - 101.7 - 2.79 - 101.8 - 16.68 - 102.1 5.0 - 34.86 - 19.8 - 2.84 - 105.9 - 2.84 - 105.9 - 16.44 - 103.6 5.2 - 30.17 - 9.9 - 2.89 - 109.9 - 2.90 - 110.1 - 16.17 - 104.5 5.4 - 27.13 - 7.3 - 2.96 - 114.1 - 2.95 - 114.1 - 16.03 - 105.6 5.6 - 24.54 - 5.9 - 3.03 - 118.3 - 3.02 - 118.4 - 15.72 - 107.0 5.8 - 22.91 - 7.6 - 3.07 - 122.5 - 3.08 - 122.6 - 15.40 - 108.7 6.0 - 21.40 - 11.8 - 3.14 - 126.6 - 3.14 - 126.6 - 15.05 - 109.6 6.2 - 20.12 - 17.1 - 3.21 - 130.6 - 3.21 - 130.8 - 14.69 - 111.4 6.4 - 18.82 - 22.2 - 3.28 - 134.8 - 3.27 - 134.9 - 14.38 - 112.5 6.6 - 17.69 - 24.7 - 3.35 - 138.9 - 3.35 - 139.1 - 14.00 - 114.3 6.8 - 16.78 - 28.2 - 3.41 - 143.1 - 3.41 - 143.1 - 13.77 - 116.3 7.0 - 16.01 - 30.9 - 3.49 - 147.2 - 3.49 - 147.3 - 13.35 - 117.8 7.2 - 15.35 - 34.9 - 3.56 - 151.4 - 3.56 - 151.4 - 13.05 - 120.4 7.4 - 14.54 - 38.7 - 3.65 - 155.5 - 3.63 - 155.6 - 12.73 - 122.3 7.6 - 13.93 - 42.1 - 3.71 - 159.5 - 3.71 - 159.6 - 12.36 - 124.7 7.8 - 13.18 - 46.1 - 3.77 - 163.6 - 3.77 - 163.8 - 12.13 - 127.3 8.0 - 12.71 - 48.8 - 3.87 - 167.8 - 3.87 - 168.0 - 11.82 - 129.9
dc - 6ghz 6 - bit digital attenuator cht4012 - 98f ref. : dscht40121069 - 10 mar 11 5 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 typical measurements in test fixture : [s] parameters t= +25c, v+ = +5v, v - = - 5v s21 versus frequency attenuator state 0 s11 versus frequency all attenuator states s22 versus frequency all attenuator states
cht4012 - 98f dc - 6ghz 6 - bit digital attenuator ref. : dscht40121069 - 10 mar 11 6 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 typical measurements in test fixture : attenuator performances: attenuation error t= +25c, v+ = +5v, v - = - 5v attenuation error versus frequency all attenuator states attenuation error versus attenuator state 0.1ghz < freq. < 6ghz rms attenuation error atte nuation versus attenuator state 0.1ghz < freq. < 6ghz
dc - 6ghz 6 - bit digital attenuator cht4012 - 98f ref. : dscht40121069 - 10 mar 11 7 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 typical measurements in test fixture : attenuator performances: phase variation t= +25c, v+ = +5v, v - = - 5v rms of phase variation phase variation versus frequency all attenuator states phase variation versus attenuator state 0.1ghz < freq. < 6ghz
cht4012 - 98f dc - 6ghz 6 - bit digital attenuator ref. : dscht40121069 - 10 mar 11 8 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 typical measurements in test fixture : attenuator performances: phase variation t= +25c, v+ = +5v, v - = - 5v variation of the gain versus frequency attenuator states : 0 / 1/ 2 / 4 / 8 / 16 / 32 / 63 inp ut power : - 5 to 22dbm variation of the gain versus input power attenuator states: 0 / 1/ 2 / 4 / 8 / 16 / 32 / 63 frequency: 0.25ghz to 6ghz
dc - 6ghz 6 - bit digital attenuator cht4012 - 98f ref. : dscht40121069 - 10 mar 11 9 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 mechanical dimensions and pad allocation chip thickness = 100m +/ - 10m. rf pads (1, 14) = 122 x 100m2 dc and control pads (2, 4, 6, 7, 8, 9, 10, 13, 12, 15, 16) = 100 x 100m2 pin number pad name description 1 in input rf: 2 a1 attenuator bit 1 4 a2 attenuator bit 2 6 a3 attenuator bit 3 7 a4 attenuator bit 4 8 a5 attenuator bit 5 9 a6 attenuator bit 6 10 v - - 5v supply voltage: interface 13 v+ +5v supply voltage: interface (1) 14 out output rf 3, 5 nc 11 v+ nc (1) 12, 15, 16 gnd nc (1) pin n 11 is internally connected to pin n 13. each one of these pins can be indifferently used to supply the control interface with +5v
cht4012 - 98f dc - 6ghz 6 - bit digital attenuator ref. : dscht40121069 - 10 mar 11 10 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 bonding recommendations port connection in (1) out (14) inductance (lbonding) = 0.3nh o ne w ire: diameter 25m, length 0. 4 m m dc and interface pads inductance (lbonding) = 0.8nh one wire: diameter 25m, length 1 .0 mm recommended assembly diagram note : an external capacitance is requested to protect the device from any external dc voltage that might be present on the rf accesses.
dc - 6ghz 6 - bit digital attenuator cht4012 - 98f ref. : dscht40121069 - 10 mar 11 11 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 bonding recommendations pin number pad name value 2 a1 0v / 3.3v or 0v / 5v 4 a2 0v / 3.3v or 0v / 5v 6 a3 0v / 3.3v or 0v / 5v 7 a4 0v / 3.3v or 0v / 5v 8 a5 0v / 3.3v or 0v / 5v 9 a6 0v / 3.3v or 0v / 5v 10 v - - 5v 13 v+ +5v note: c ontrol voltages of the attenuator bits are both cmos and ttl compatible
cht4012 - 98f dc - 6ghz 6 - bit digital attenuator ref. : dscht40121069 - 10 mar 11 12 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 attenuator control table voltage to apply on the pads a1 to a6: state att ( db) a6 a5 a4 a3 a2 a1 state att (db) a6 a5 a4 a3 a2 a1 0 0 0 0 0 0 0 0 33 16.5 3.3 0 0 0 0 3.3 1 0.5 0 0 0 0 0 3.3 34 17 3.3 0 0 0 3.3 0 2 1 0 0 0 0 3.3 0 35 17.5 3.3 0 0 0 3.3 3.3 3 1.5 0 0 0 0 3.3 3.3 36 18 3.3 0 0 3.3 0 0 4 2 0 0 0 3.3 0 0 37 18.5 3.3 0 0 3.3 0 3.3 5 2.5 0 0 0 3.3 0 3.3 38 19 3.3 0 0 3.3 3.3 0 6 3 0 0 0 3.3 3.3 0 39 19.5 3.3 0 0 3.3 3.3 3.3 7 3.5 0 0 0 3.3 3.3 3.3 40 20 3.3 0 3.3 0 0 0 8 4 0 0 3.3 0 0 0 41 20.5 3.3 0 3.3 0 0 3.3 9 4.5 0 0 3.3 0 0 3.3 42 21 3.3 0 3.3 0 3.3 0 10 5 0 0 3.3 0 3.3 0 43 21.5 3.3 0 3.3 0 3.3 3.3 11 5.5 0 0 3.3 0 3.3 3.3 44 22 3.3 0 3.3 3.3 0 0 12 6 0 0 3.3 3.3 0 0 45 22.5 3.3 0 3.3 3.3 0 3.3 13 6.5 0 0 3.3 3.3 0 3.3 46 23 3.3 0 3.3 3.3 3.3 0 14 7 0 0 3.3 3.3 3.3 0 47 23.5 3.3 0 3.3 3.3 3.3 3.3 15 7.5 0 0 3.3 3.3 3.3 3.3 48 24 3.3 3.3 0 0 0 0 16 8 0 3.3 0 0 0 0 49 24.5 3.3 3.3 0 0 0 3.3 17 8.5 0 3.3 0 0 0 3.3 50 25 3.3 3.3 0 0 3.3 0 18 9 0 3.3 0 0 3.3 0 51 25.5 3.3 3.3 0 0 3.3 3.3 19 9.5 0 3.3 0 0 3.3 3.3 52 26 3.3 3.3 0 3.3 0 0 20 10 0 3.3 0 3.3 0 0 53 26.5 3.3 3.3 0 3.3 0 3.3 21 10.5 0 3.3 0 3.3 0 3.3 54 27 3.3 3.3 0 3.3 3.3 0 22 11 0 3.3 0 3.3 3.3 0 55 27.5 3.3 3.3 0 3.3 3.3 3.3 23 11.5 0 3.3 0 3.3 3.3 3.3 56 28 3.3 3.3 3.3 0 0 0 24 12 0 3.3 3.3 0 0 0 57 28.5 3.3 3.3 3.3 0 0 3.3 25 12.5 0 3.3 3.3 0 0 3.3 58 29 3.3 3.3 3.3 0 3.3 0 26 13 0 3.3 3.3 0 3.3 0 59 29.5 3.3 3.3 3.3 0 3.3 3.3 27 13.5 0 3.3 3.3 0 3.3 3.3 60 30 3.3 3.3 3.3 3.3 0 0 28 14 0 3.3 3.3 3.3 0 0 61 30.5 3.3 3.3 3.3 3.3 0 3.3 29 14.5 0 3.3 3.3 3.3 0 3.3 62 31 3.3 3.3 3.3 3.3 3.3 0 30 15 0 3.3 3.3 3.3 3.3 0 63 31.5 3.3 3.3 3.3 3.3 3.3 3.3 31 15.5 0 3.3 3.3 3.3 3.3 3.3 32 16 3.3 0 0 0 0 0
dc - 6ghz 6 - bit digital attenuator cht4012 - 98f ref. : dscht40121069 - 10 mar 11 13 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 note
cht4012 - 98f dc - 6ghz 6 - bit digital attenuator ref. : dscht40121069 - 10 mar 11 14 / 14 specifications subject to change without notice route dpartementale 128, bp46 - 91401 orsay cedex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 recommended esd management refer to the application note an0020 available at http://www.ums - gaas.com for esd sensitivity and handling recommendations for the ums products. ordering information chip form : cht4012 - 98 f /00 information furnished is believed to be accurate and reliable. however united monolithic semiconductors s.a.s. assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties wh ich may result from its use. no license is granted by implication or otherwise under any patent or patent rights of united monolithic semiconductors s.a.s. . specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. united monolithic semiconductors s.a.s. products are not authorised for use as critical components in life support devices or systems without express written approval from united monolithic semi conductors s.a.s.

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