CHT4699-QDG 36-44GHz Variable Attenuator GaAs Monolithic Microwave IC NC NC NC NC 24 23 22 21 20 19 2 17 GND GND 3 16 GND RF IN 4 15 RF OUT GND 5 14 GND GND 6 13 GND 8 9 10 11 12 NC 7 NC GND V2 NC V1 18 NC 1 NC NC It is designed for a wide range of applications, from military to commercial communication systems. The circuit is manufactured with a MESFET process, 0.7µm gate length, via holes through the substrate, air bridges. NC The CHT4699-QDG is a monolithic 3644GHz Variable Voltage Attenuator. NC Description 0 Main Features -5 -10 dBS21 (dB) ■ Broadband performances: 36-44GHz ■ Minimum attenuation: 4dB ■ 30dB dynamic range ■ 27dBm input IP3 ■ DC bias: -5 to 0V ■ 24L QFN4x4 A -15 -20 -25 B -30 -35 -40 35 37.5 40 42.5 45 47.5 50 Frequency (GHz) Main Electrical Characteristics Tamb.= +25°C Symbol Parameter Freq Frequency range Min Att Minimum attenuation with V1=V2= -5V Dyn Dynamic range of attenuation IIP3 Input IP3 all attenuation Ref. : DSCHT4699-QDG2118 - 27 Apr 12 1/12 Min 36.0 Typ Max 44.0 -4 30 27 Unit GHz dB dB dBm Specifications subject to change without notice United Monolithic Semiconductors S.A.S. Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Electrical Characteristics Tamb.= +25°C, Symbol Parameter Freq Frequency range Min Att. Min 36 Typ Max 44 Unit GHz |S21| (V1=-5V;V2=-5V) -4 dB Dyn Attenuation dynamic 30 dB RLin Input Return loss (any attenuation) -10 dB RLout Output Return loss (any attenuation) -10 dB Pin1dB Input 1dB compression point (any attenuation) 20 dBm IIP3 Input 3rd order Intercept Point (any attenuation) 27 dBm These values are representative of onboard measurements as defined on the drawing in paragraph "Evaluation mother board". Absolute Maximum Ratings (1) Tamb.= +25°C Symbol Parameter Values Unit V1 V1 control voltage -6 to +0.6 V V2 V2 control voltage -6 to +0.6 V Pin RF input power overdrive (2) +33 dBm Ta Operating temperature range -40 to +85 °C Tstg Storage temperature range -55 to +150 °C (1) Operation of this device above anyone of these parameters may cause permanent damage. (2) Duration < 1s. Typical Bias Conditions Tamb.= +25°C Symbol Pad No V1 9 V2 10 Parameter V1 control voltage Values -5 to 0 Unit V V2 control voltage -5 to 0 V For optimum linearity V1& V2 should be tuned in sequence. Ref. : DSCHT4699-QDG2118 - 27 Apr 12 2/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Typical Package Sij parameters Tamb.= +25°C, V1= -5V, V2= -5V, Minimum attenuation Freq S11 PhS11 S21 PhS21 S12 (GHz) (dB) (°) (dB) (°) (dB) 25 25.5 26 26.5 27 27.5 28 28.5 29 29.5 30 30.5 31 31.5 32 32.5 33 33.5 34 34.5 35 35.5 36 36.5 37 37.5 38 38.5 39 39.5 40 40.5 41 41.5 42 42.5 43 43.5 44 44.5 45 45.5 46 46.5 47 47.5 48 48.5 49 49.5 50 -12.6 -11.0 -9.8 -8.8 -8.3 -7.9 -7.8 -7.8 -7.9 -8.1 -8.4 -9.1 -10.0 -11.3 -12.7 -14.7 -17.1 -20.5 -25.9 -39.6 -31.7 -25.6 -23.1 -21.2 -19.4 -17.4 -15.7 -14.1 -12.8 -11.7 -10.6 -9.8 -9.4 -9.4 -9.5 -10.1 -11.3 -13.1 -14.6 -13.7 -10.9 -8.5 -6.9 -5.7 -4.9 -4.3 -4.1 -3.7 -3.6 -3.6 -3.8 -106 -124 -140 -157 -174 170 154 139 124 108 92 76 59 43 27 11 -4 -21 140 98 -51 -72 -81 -88 -93 -102 -111 -122 -135 -148 -162 -178 165 148 133 117 103 95 98 110 108 96 79 64 -134 -152 -169 176 159 143 127 -3.2 -3.5 -3.6 -3.8 -3.9 -4.0 -4.1 -4.1 -4.1 -3.9 -3.8 -3.7 -3.6 -3.6 -3.6 -3.7 -3.6 -3.5 -3.5 -3.4 -3.3 -3.3 -3.1 -3.1 -3.2 -3.2 -3.3 -3.4 -3.8 -4.0 -4.1 -4.3 -4.4 -4.7 -4.6 -4.5 -4.5 -4.5 -4.7 -5.3 -6.0 -6.9 -7.9 -8.9 -9.7 -10.5 -11.3 -11.6 -12.1 -12.7 -13.0 176 156 137 118 99 81 62 44 25 7 -13 -33 -52 -73 -92 -112 -131 -151 -171 168 148 127 106 84 63 40 18 -4 -26 -47 -69 -90 -112 -133 -154 -177 160 136 109 84 59 35 13 -6 -26 -46 -64 -82 -101 -119 -138 -3.2 -3.5 -3.6 -3.8 -3.9 -4.0 -4.1 -4.1 -4.1 -3.9 -3.8 -3.7 -3.6 -3.6 -3.6 -3.7 -3.6 -3.5 -3.4 -3.4 -3.3 -3.3 -3.1 -3.1 -3.2 -3.2 -3.3 -3.5 -3.8 -4.0 -4.1 -4.3 -4.4 -4.7 -4.6 -4.5 -4.5 -4.5 -4.7 -5.3 -5.9 -6.9 -7.9 -8.9 -9.7 -10.5 -11.3 -11.5 -12.1 -12.7 -13.0 PhS12 (°) S22 (dB) PhS22 (°) 176 156 137 118 99 81 62 44 25 7 -13 -33 -52 -73 -92 -112 -131 -151 -171 168 148 127 106 84 63 40 18 -4 -26 -47 -69 -90 -112 -133 -154 -176 160 136 109 84 59 35 13 -6 -26 -46 -64 -81 -102 -119 -138 -12.9 -11.2 -9.8 -8.9 -8.3 -7.9 -7.8 -7.8 -7.9 -8.1 -8.4 -9.1 -10.0 -11.3 -13.0 -14.9 -16.8 -19.1 -21.7 -24.4 -27.3 -29.9 -34.9 -33.3 -25.9 -20.7 -17.2 -14.9 -13.1 -11.6 -10.4 -9.5 -9.1 -9.2 -9.2 -9.8 -10.9 -12.7 -14.2 -12.8 -9.6 -7.3 -5.7 -4.6 -3.7 -3.2 -2.9 -2.3 -2.3 -2.4 -2.3 -103 -122 -140 -158 -177 165 147 130 113 95 77 60 42 24 8 -6 -18 -29 146 143 142 139 110 -13 -53 -76 -97 -117 -133 -151 -168 174 158 142 128 112 99 92 98 113 111 99 85 70 -127 -144 -158 -172 173 159 146 Refer to the “definition of Sij reference planes” section below Ref. : DSCHT4699-QDG2118 - 27 Apr 12 3/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Typical Package Sij parameters Tamb.= +25°C, V1= 0V, V2= 0V, Maximum attenuation Freq S11 PhS11 S21 PhS21 S12 (GHz) (dB) (°) (dB) (°) (dB) 25 25.5 26 26.5 27 27.5 28 28.5 29 29.5 30 30.5 31 31.5 32 32.5 33 33.5 34 34.5 35 35.5 36 36.5 37 37.5 38 38.5 39 39.5 40 40.5 41 41.5 42 42.5 43 43.5 44 44.5 45 45.5 46 46.5 47 47.5 48 48.5 49 49.5 50 -12.5 -12.2 -12.0 -11.8 -11.8 -11.9 -12.0 -12.3 -12.7 -13.0 -13.4 -14.1 -14.8 -15.8 -16.8 -17.8 -18.9 -20.0 -20.9 -21.1 -21.1 -20.6 -19.7 -19.1 -18.8 -17.9 -17.2 -16.3 -15.6 -15.0 -14.3 -13.7 -13.0 -12.4 -11.6 -10.7 -9.9 -9.3 -8.9 -8.8 -8.4 -8.1 -7.5 -7.0 -6.4 -6.0 -5.7 -5.2 -5.0 -4.8 -4.7 -150 -161 -173 176 165 153 142 131 121 111 101 90 80 71 65 59 55 53 -125 -124 -122 -120 -121 -127 -130 -134 -139 -146 -154 -161 -169 -178 174 165 156 145 133 120 106 95 83 72 60 50 -143 -158 -171 176 161 146 132 -29.2 -29.3 -29.1 -29.3 -29.2 -29.2 -29.4 -29.1 -29.1 -29.5 -29.3 -28.9 -29.2 -29.2 -29.3 -29.2 -29.3 -29.4 -29.8 -29.6 -29.7 -30.1 -30.9 -31.6 -31.9 -32.3 -33.7 -34.1 -35.9 -36.4 -38.6 -39.3 -43.1 -46.0 -41.5 -38.8 -36.4 -35.7 -35.0 -35.4 -38.0 -39.6 -40.9 -42.3 -43.4 -40.3 -39.9 -38.0 -38.9 -38.2 -37.7 178 162 142 125 107 88 71 53 36 18 2 -15 -33 -50 -66 -83 -98 -118 -131 -148 -166 177 156 144 129 112 97 80 70 55 45 28 32 55 55 49 30 13 -11 -36 -63 -61 -76 -76 -71 -87 -90 -105 -119 -135 -160 -29.1 -29.3 -29.2 -29.2 -28.9 -29.2 -29.4 -29.1 -29.1 -29.4 -29.2 -29.0 -29.2 -29.1 -29.2 -29.3 -29.2 -29.5 -29.7 -29.7 -29.4 -29.9 -30.7 -31.8 -32.1 -32.3 -33.5 -34.1 -35.8 -37.0 -38.6 -39.2 -42.9 -45.2 -41.7 -39.0 -37.0 -36.1 -34.6 -35.4 -37.5 -39.0 -39.7 -42.3 -42.4 -40.9 -41.0 -37.8 -38.2 -37.9 -38.4 PhS12 (°) S22 (dB) PhS22 (°) 178 162 142 125 107 88 71 53 35 18 2 -16 -33 -50 -66 -83 -99 -117 -131 -148 -165 176 156 145 129 112 94 79 70 55 44 32 27 43 55 48 35 13 -10 -36 -58 -67 -77 -81 -68 -78 -82 -103 -126 -138 -159 -12.7 -12.6 -12.4 -12.3 -12.3 -12.4 -12.6 -12.8 -13.1 -13.4 -13.9 -14.3 -15.1 -16.0 -17.2 -18.5 -19.7 -20.9 -21.5 -22.3 -23.4 -24.0 -24.1 -23.9 -22.7 -21.3 -20.0 -18.4 -17.2 -16.2 -15.1 -14.2 -13.2 -12.5 -11.3 -10.3 -9.5 -8.7 -8.2 -7.8 -7.2 -6.9 -6.3 -5.8 -5.2 -4.7 -4.3 -3.7 -3.5 -3.4 -3.2 -153 -165 -177 171 158 145 132 120 108 95 84 72 60 49 39 30 24 19 -161 -164 -163 -159 -152 -146 -144 -146 -149 -154 -160 -168 -176 176 169 161 154 143 131 120 107 97 86 76 66 56 -136 -150 -162 -172 174 162 149 Refer to the “definition of Sij reference planes” section below Ref. : DSCHT4699-QDG2118 - 27 Apr 12 4/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Typical Board Measurements Tamb.= +25°C Measurements in the package access planes Gain versus control voltage 0 -5 dBS21 (dB) -10 A -15 -20 -25 B -30 A : V1 = -5V to 0V & V2= -5V -35 B : V1= 0V & V2 = -5V to 0V -40 35 37.5 40 42.5 45 47.5 50 Frequency (GHz) S11 versus control voltage S22 versus control voltage 0 -5 -5 -10 -10 dBS22 (dB) dBS11 (dB) 0 -15 -15 -20 -20 V1= -5V, V2= -5V -25 V1= -5V, V2= -5V -25 V1= 0V, V2= 0V V1= 0V, V2= 0V -30 -30 30 32.5 35 37.5 40 42.5 Frequency (GHz) 45 47.5 50 30 32.5 35 37.5 40 42.5 Frequency (GHz) 45 47.5 50 1- Ref. : DSCHT4699-QDG2118 - 27 Apr 12 5/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Typical Board Measurements Tamb.= +25°C Measurements in the package access planes Gain versus control voltage 0 37.5GHz 39.5GHz 41.5GHz 43.5GHz -5 dBS21 (dB) -10 V1 variable with V2= -5V -15 -20 -25 -30 V2 variable with V1= 0V -35 -40 -5 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 Control Voltage V1 or V2 (V) Gain versus input power & V1 control voltage with V2= -5V 38GHz 42GHz 0 0 -2 -2 -4 -4 V1= -5V V1= -3.5V V1= -3.3V V1= -3.1V V1= -5V V1= -3.5V V1= -3.3V V1= -2.9V V1= -2.7V V1= -2.5V V1= -3.1V -6 V1= -2.9V V1= -2.7V V1= -2.5V Gain (dB) Gain (dB) -6 -8 -10 -8 -10 -12 -12 -14 -14 -16 -16 0 5 10 15 Input power (dBm) 20 25 0 5 10 15 Input power (dBm) 20 25 2- Ref. : DSCHT4699-QDG2118 - 27 Apr 12 6/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Typical Board Measurements Tamb.= +25°C Measurements in the package access planes Input IP3 versus input power & V1 control voltage at 38GHz with V2= -5V 40 38 36 Input IP3 (dBm) 34 32 30 28 26 24 V1= -5V V1= -3.3V V1= -3.1V V1= -2.9V V1= -2.7V 22 20 0 1 2 3 4 5 6 Input Power DCL (dBm) Input IP3 versus input power & V1 control voltage at 42GHz with V2= -5V 40 38 36 Input IP3 (dBm) 34 32 30 28 26 24 V1= -5V V1= -3.3V V1= -3.1V V1= -2.9V V1= -2.7V 22 20 2 3 4 5 6 Input Power DCL (dBm) Ref. : DSCHT4699-QDG2118 - 27 Apr 12 7/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Typical Board Measurements Tamb.= +25°C Measurements in the package access planes Input IP3 versus input power with V1= V2 42GHz 40 40 38 38 36 36 34 34 Input IP3 (dBm) Input IP3 (dBm) 38GHz 32 30 28 26 24 -3.3V 22 -3.1V -2.9V 32 30 28 26 24 -2.7V -3.3V 22 20 -3.1V -2.9V -2.7V 20 0 1 2 3 4 Input Power DCL (dBm) 5 6 2 3 4 Input Power DCL (dBm) 5 6 0 0 -5 -5 -10 -10 Gain (dB) Gain (dB) Gain versus frequency and biasing option V1 variable with V2=-5V V1=V2 -15 -20 -15 -20 -25 V1= -5V V1= -2.9V -30 36 37 V1= -3.3V V1= -2.7V 38 -25 V1= -3.1V 39 40 Frequency (GHz) Ref. : DSCHT4699-QDG2118 - 27 Apr 12 -5V -3.3V 37 38 -3.1V -2.9V -2.7V -30 41 42 36 8/12 39 40 Frequency (GHz) 41 42 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Package outline (1) Matt tin, Lead Free Units : From the standard : (Green) mm JEDEC MO-220 (VGGD) 25- GND 12345678- Nc Gnd(2) Gnd(2) RF IN Gnd(2) Gnd(2) Nc Nc 910111213141516- V1 V2 Nc Nc Gnd(2) Gnd(2) RF out Gnd(2) 1718192021222324- Gnd(2) Nc Nc Nc Nc Nc Nc Nc (1) The package outline drawing included to this data-sheet is given for indication. Refer to the application note AN0017 (http://www.ums-gaas.com) for exact package dimensions. (2) It is strongly recommended to ground all pins marked “Gnd” through the PCB board. Ensure that the PCB board is designed to provide the best possible ground to the package. Ref. : DSCHT4699-QDG2118 - 27 Apr 12 9/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Evaluation mother board ■ Compatible with the proposed footprint. ■ Based on typically Ro4003 / 8mils or equivalent. ■ Using a micro-strip to coplanar transition to access the package. ■ Recommended for the implementation of this product on a module board. ■ Decoupling capacitors of 10nF ±10% are recommended for all DC accesses. ■ See application note AN0017 for details. Definition of the Sij reference planes The reference planes used for Sij measurements given above are symmetrical from the symmetrical axis of the package (see drawing beside). The input and output reference planes are located at 3.18mm offset (input wise and output wise respectively) from this axis. Then, the given Sij parameters incorporate the land pattern of the evaluation motherboard recommended in paragraph "Evaluation mother board". 3.18 Ref. : DSCHT4699-QDG2118 - 27 Apr 12 10/12 3.18 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Biasing sequence To obtain good performances in linearity, biasing voltage should be applied as following: - Control of 1st stage attenuation with V1 from –5V to 0V, with V2 fixed at -5V - Control of 2nd stage with V2 from -5V to 0V, with V1 fixed at 0V Voltage 0V V1 V2 -5V Min. Max. Attenuation This part could be also driven in Single Voltage Control, applying the same voltage from -5V to 0V on V1 and V2. Ref. : DSCHT4699-QDG2118 - 27 Apr 12 11/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34 CHT4699-QDG 36-44GHz Variable Attenuator Recommended package footprint Refer to the application note AN0017 available at http://www.ums-gaas.com for package foot print recommendations and exact package dimensions. SMD mounting procedure For the mounting process standard techniques involving solder paste and a suitable reflow process can be used. For further details, see application note AN0017 available at http://www.ums-gaas.com. Recommended environmental management UMS products are compliant with the regulation in particular with the directives RoHS N°2011/65 and REACh N°1907/2006. More environmental data are available in the application note AN0019 also available at http://www.ums-gaas.com. 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 package products. Ordering Information QFN 4x4 RoHS compliant package: CHT4699-QDG Stick: XY = 20 Tape & reel: XY = 21 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 which 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 Semiconductors S.A.S. Ref. : DSCHT4699-QDG2118 - 27 Apr 12 12/12 Specifications subject to change without notice Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34