CHT4699-99F 36-44GHz Variable Attenuator GaAs Monolithic Microwave IC Description The CHT4699-99F is a monolithic 36- 44GHz Variable Voltage Attenuator. RF_OUT It is designed for a wide range of applications, from military to commercial communication systems. RF_IN The circuit is manufactured with a MESFET process, 0.7µm gate length, via holes through the substrate, air bridges. It is available in chip form. V1 V2 0 -2 Main Features -4 -6 -8 ■ Broadband performances: 36-44GHz ■ Minimum attenuation: 4dB ■ 30dB dynamic range ■ 27dBm input IP3 ■ DC bias: -5 to 0V ■ Chip size 2.41x1.5x0.1mm -10 A dBS21 (dB) -12 -14 -16 -18 -20 -22 -24 B -26 -28 -30 -32 -34 35.0 A: V1 from -5V to 0V & V2= -5V B: V1= 0V & V2 from -5V to 0V 37.5 40.0 42.5 45.0 47.5 50.0 Frequency (GHz) Main Electrical Characteristics Tamb.= +25°C Symbol Parameter Freq Frequency range Min Att Minimum attenuation with V1=V2= -5V Dyn Att Dynamic range of attenuation IIP3 Input IP3 all attenuation Ref. : DSCHT46992090 - 30 Mar 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 CHT4699-99F 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) -8 dB Pin1dB Input 1dB compression point (any attenuation) 20 dBm I IP3 Input 3rd order Intercept Point (any attenuation) 27 dBm These values are representative of on-wafer measurements that are made without bonding wires at the RF ports. A bonding wire of typically 0.1 to 0.15nH will improve the matching at the accesses. 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 V1 V2 V2 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. : DSCHT46992090 - 30 Mar 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 CHT4699-99F 36-44GHz Variable Attenuator Typical on wafer Sij parameters Tamb.= +25°C, V1= -5 V, V2=-5 V, Minimum attenuation Freq S11 PhS11 S12 PhS12 S21 (GHz) (dB) (°) (dB) (°) (dB) 25.0 25.5 26.0 26.5 27.0 27.5 28.0 28.5 29.0 29.5 30.0 30.5 31.0 31.5 32.0 32.5 33.0 33.5 34.0 34.5 35.0 35.5 36.0 36.5 37.0 37.5 38.0 38.5 39.0 39.5 40.0 40.5 41.0 41.5 42.0 42.5 43.0 43.5 44.0 44.5 45.0 45.5 46.0 46.5 47.0 47.5 48.0 48.5 49.0 49.5 50.0 -19.46 -21.44 -22.65 -21.57 -20.47 -18.31 -16.03 -14.38 -13.17 -11.99 -11.29 -10.46 -9.95 -9.70 -9.26 -8.57 -8.24 -8.09 -7.59 -7.42 -7.14 -7.28 -7.51 -7.56 -8.09 -8.60 -8.73 -9.43 -9.77 -10.25 -11.94 -13.58 -15.22 -17.80 -18.88 -17.78 -15.78 -13.90 -11.87 -10.25 -9.30 -8.64 -8.75 -8.46 -8.19 -8.02 -7.44 -8.08 -8.32 -8.44 -10.43 -17.4 -10.3 10.1 28.1 41.5 50.0 52.0 49.4 46.0 42.3 39.0 33.2 28.5 24.5 21.6 18.5 12.5 8.8 5.0 -0.6 -8.2 -12.8 -18.2 -24.6 -28.7 -31.7 -36.7 -40.2 -43.1 -50.9 -55.1 -55.1 -53.3 -43.2 -23.1 -6.7 5.7 7.5 9.1 5.3 -1.2 -8.3 -13.8 -18.1 -22.3 -25.5 -31.5 -39.7 -41.1 -48.7 -58.0 Ref. : DSCHT46992090 - 30 Mar 12 -3.02 -3.03 -3.09 -3.14 -3.11 -3.05 -3.12 -3.35 -3.51 -3.61 -3.78 -3.98 -4.02 -4.04 -4.00 -4.32 -4.37 -4.39 -4.32 -4.36 -3.92 -4.09 -4.02 -4.35 -4.14 -4.04 -3.72 -3.59 -3.75 -3.75 -3.73 -3.80 -3.79 -3.59 -3.70 -3.68 -3.84 -3.80 -4.10 -4.38 -4.71 -5.28 -5.73 -5.37 -4.85 -5.30 -6.30 -6.56 -6.92 -6.66 -5.71 53.8 45.6 37.9 30.8 23.6 15.3 7.1 -1.0 -8.7 -15.9 -22.1 -29.8 -36.6 -43.0 -49.9 -58.7 -63.5 -70.1 -76.6 -82.9 -90.0 -97.7 -105.9 -111.6 -118.8 -125.2 -132.8 -141.2 -150.8 -157.6 -165.3 -173.6 178.5 170.1 161.7 153.2 143.8 136.7 126.2 116.9 108.1 102.0 96.8 89.9 82.1 68.6 64.2 56.0 52.3 49.4 37.4 3/12 -3.13 -3.04 -3.13 -3.14 -3.06 -3.06 -3.18 -3.31 -3.33 -3.52 -3.56 -3.56 -3.69 -3.68 -3.83 -3.67 -4.15 -4.30 -4.08 -3.88 -3.49 -3.71 -3.42 -4.08 -4.11 -4.05 -3.64 -3.47 -3.73 -3.83 -4.07 -3.89 -3.73 -3.65 -3.73 -3.72 -3.79 -3.73 -3.96 -4.65 -5.34 -5.54 -5.46 -5.51 -5.86 -6.14 -6.66 -7.14 -7.72 -7.18 -7.01 PhS21 (°) S22 (dB) PhS22 (°) 53.5 45.9 38.6 31.4 23.4 15.8 7.4 -0.6 -6.9 -15.1 -21.6 -28.6 -34.9 -42.3 -50.3 -57.9 -65.6 -69.3 -76.2 -80.2 -89.4 -98.4 -108.0 -116.3 -120.9 -128.0 -133.5 -143.8 -151.5 -161.0 -167.0 -173.3 178.7 169.1 161.0 152.2 144.0 134.1 122.6 114.1 106.2 101.1 95.0 84.7 78.0 69.2 60.2 56.5 50.4 47.2 36.4 -20.13 -21.81 -22.83 -22.67 -21.34 -18.76 -15.88 -13.89 -12.59 -11.73 -10.82 -10.07 -9.46 -8.83 -8.46 -7.98 -7.66 -7.69 -7.68 -7.69 -7.50 -7.63 -7.84 -8.18 -8.86 -9.49 -9.52 -9.77 -9.88 -10.39 -11.25 -12.21 -13.36 -14.03 -14.48 -14.80 -14.21 -12.11 -10.53 -9.63 -8.86 -7.90 -7.30 -6.64 -6.12 -6.08 -6.29 -6.02 -6.20 -6.63 -7.65 -10.5 4.0 23.7 36.9 47.5 53.5 53.7 50.9 49.1 48.0 44.0 37.6 31.2 25.0 20.4 16.8 12.1 7.7 2.1 -2.8 -11.1 -15.5 -19.7 -22.1 -23.3 -24.4 -27.7 -31.1 -34.0 -38.3 -38.5 -39.6 -34.3 -28.1 -25.3 -14.9 -4.5 0.3 -0.5 -2.0 -2.7 -3.5 -9.1 -17.6 -25.3 -32.7 -35.3 -38.2 -45.0 -51.7 -56.9 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 CHT4699-99F 36-44GHz Variable Attenuator Typical on wafer Sij parameters Tamb.= +25°C, V1= 0 V, V2= 0 V, Maximum attenuation Freq S11 PhS11 S12 PhS12 S21 (GHz) (dB) (°) (dB) (°) (dB) 25.0 25.5 26.0 26.5 27.0 27.5 28.0 28.5 29.0 29.5 30.0 30.5 31.0 31.5 32.0 32.5 33.0 33.5 34.0 34.5 35.0 35.5 36.0 36.5 37.0 37.5 38.0 38.5 39.0 39.5 40.0 40.5 41.0 41.5 42.0 42.5 43.0 43.5 44.0 44.5 45.0 45.5 46.0 46.5 47.0 47.5 48.0 48.5 49.0 49.5 50.0 -17.55 -16.91 -16.15 -15.35 -14.89 -14.38 -13.86 -13.49 -13.14 -12.81 -12.92 -12.82 -12.88 -13.10 -13.15 -12.85 -12.74 -12.76 -12.64 -12.70 -12.78 -12.64 -12.79 -12.93 -13.33 -13.44 -13.22 -13.16 -12.89 -12.53 -13.51 -13.56 -13.02 -12.68 -12.38 -11.85 -11.83 -12.80 -12.37 -11.43 -11.08 -10.84 -11.59 -11.81 -11.48 -10.75 -9.95 -10.79 -10.52 -9.83 -10.36 17.7 18.8 19.1 18.9 16.8 14.8 13.8 11.4 8.6 6.2 2.8 -0.1 -2.0 -3.6 -3.2 -2.7 -5.1 -6.4 -6.8 -10.0 -11.4 -11.5 -13.8 -16.2 -14.5 -12.5 -13.0 -11.6 -11.9 -17.0 -16.7 -11.2 -9.7 -8.8 -8.1 -12.6 -16.8 -17.8 -10.2 -9.5 -12.8 -17.1 -19.8 -15.5 -14.3 -12.7 -17.7 -21.1 -16.2 -16.5 -23.6 Ref. : DSCHT46992090 - 30 Mar 12 -28.64 -28.62 -28.90 -29.24 -29.43 -29.38 -29.69 -30.15 -30.22 -30.35 -30.98 -31.26 -31.03 -30.72 -31.06 -31.52 -31.93 -32.27 -31.83 -31.91 -31.87 -31.90 -32.40 -32.44 -32.64 -33.05 -32.97 -32.83 -33.05 -33.00 -33.45 -33.72 -33.80 -33.50 -34.22 -34.43 -34.17 -33.22 -33.58 -33.53 -33.53 -33.97 -34.65 -34.77 -33.32 -32.97 -34.11 -33.76 -34.41 -33.76 -32.84 56.7 49.3 42.3 36.9 32.3 25.2 18.8 13.2 8.5 1.2 -1.8 -6.6 -9.2 -16.1 -24.6 -31.0 -34.9 -39.0 -42.9 -49.5 -56.0 -63.3 -69.8 -76.1 -80.2 -87.2 -90.5 -96.4 -104.5 -111.2 -115.2 -121.8 -127.7 -133.4 -140.3 -144.0 -144.9 -149.1 -161.4 -163.7 -175.4 -178.0 177.1 -176.9 177.6 165.9 160.8 156.1 151.4 159.8 151.0 4/12 -28.6 -28.6 -29.0 -29.3 -29.3 -29.2 -29.8 -30.2 -30.2 -30.4 -30.8 -31.0 -30.5 -30.5 -30.9 -31.2 -31.8 -32.0 -31.7 -31.4 -31.7 -31.6 -32.2 -32.2 -32.5 -32.9 -33.0 -32.7 -33.1 -32.9 -33.4 -33.7 -33.6 -33.9 -34.3 -34.6 -33.8 -32.9 -33.7 -33.9 -34.3 -34.1 -34.5 -34.3 -33.9 -33.8 -34.4 -35.0 -34.2 -34.7 -33.6 PhS21 (°) S22 (dB) PhS22 (°) 55.4 48.0 42.9 37.3 32.4 26.1 18.6 13.5 9.3 3.3 -2.0 -5.9 -8.6 -16.0 -25.1 -31.3 -35.0 -38.8 -42.8 -48.0 -57.1 -63.2 -71.6 -77.4 -82.6 -87.7 -92.6 -98.4 -105.4 -111.0 -119.4 -123.1 -129.5 -137.1 -139.6 -143.0 -143.1 -154.7 -166.5 -168.3 -173.8 -177.5 177.2 175.6 171.7 163.0 157.4 157.6 151.0 155.2 148.2 -17.34 -16.66 -16.32 -16.28 -15.72 -14.80 -14.05 -13.44 -13.23 -13.41 -13.37 -13.14 -12.83 -12.33 -12.19 -12.18 -12.29 -12.57 -13.01 -13.21 -13.09 -12.83 -12.67 -12.58 -12.92 -13.41 -13.49 -13.27 -12.81 -12.48 -12.23 -11.79 -11.35 -11.23 -11.29 -11.03 -10.75 -10.28 -9.72 -9.42 -9.12 -8.99 -9.11 -8.99 -8.76 -8.44 -8.48 -8.29 -8.36 -8.67 -8.95 19.2 22.3 21.3 18.8 16.4 13.8 12.9 12.9 12.7 11.0 10.0 6.7 3.4 0.2 -1.9 -2.8 -3.5 -4.4 -7.0 -8.9 -11.6 -12.1 -11.1 -9.6 -7.9 -6.7 -6.9 -6.0 -6.9 -7.5 -4.7 -4.3 -5.1 -5.4 -7.6 -7.6 -9.0 -10.7 -11.1 -12.1 -12.8 -14.3 -17.2 -20.0 -23.5 -28.1 -27.5 -27.2 -30.6 -31.9 -32.4 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 CHT4699-99F 36-44GHz Variable Attenuator Typical on wafer Measurements Tamb.= +25°C Gain versus Control Voltage 0 -2 -4 -6 -8 -10 A dBS21 (dB) -12 -14 -16 -18 -20 -22 -24 B -26 -28 -30 A: V1 from -5V to 0V & V2= -5V B: V1= 0V & V2 from -5V to 0V -32 -34 35.0 37.5 40.0 42.5 45.0 47.5 50.0 Frequency (GHz) Gain versus Control Voltage 0 37.5GHz 39.5GHz 41.5GHz 43.5GHz -5 V1 variable with V2= -5V dBS21 (dB) -10 -15 -20 -25 -30 V2 variable with V1= 0V -35 -5.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 Control Voltage (V1 or V2) Ref. : DSCHT46992090 - 30 Mar 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 CHT4699-99F 36-44GHz Variable Attenuator Typical on wafer Measurements Tamb.= +25°C S22 versus control voltage 0 -5 -5 dBS22 (dB) dBS11 (dB) S11 versus control voltage 0 -10 -15 -10 -15 -20 35.0 37.5 40.0 42.5 45.0 47.5 -20 35.0 50.0 37.5 40.0 Frequency (GHz) 42.5 45.0 47.5 50.0 Frequency (GHz) 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 V1= -5V V1= -3.6V V1= -2.8V V1= -2.4V V1= -3.2V Gain (dB) Gain (dB) Gain versus input power & V1 control voltage with V2= -5V 38GHz 44GHz 0 5 10 Input power (dBm) Ref. : DSCHT46992090 - 30 Mar 12 15 20 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 V1= -5V V1= -3.6V V1= -2.8V V1= -2.4V 0 6/12 5 10 Input power (dBm) V1= -3.2V 15 20 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 CHT4699-99F 36-44GHz Variable Attenuator Typical Test Fixture Measurements Tamb.= +25°C 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. : DSCHT46992090 - 30 Mar 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 CHT4699-99F 36-44GHz Variable Attenuator Typical Test Fixture Measurements Tamb.= +25°C 40 40 38 38 36 36 34 34 Input IP3 (dBm) Input IP3 (dBm) Input IP3 versus input power with V1= V2 38GHz 42GHz 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) Ref. : DSCHT46992090 - 30 Mar 12 5 6 2 8/12 3 4 Input Power DCL (dBm) 5 6 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 CHT4699-99F 36-44GHz Variable Attenuator Mechanical data Chip thickness: 100µm. Chip size: 2410x1500 ±35µm All dimensions are in micrometers Ref. : DSCHT46992090 - 30 Mar 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 CHT4699-99F 36-44GHz Variable Attenuator Recommended assembly plan RF_OUT RF_IN V1 V2 120pF 120pF To V1 DC power supply To V2 DC power supply Note: Supply feed should be bypassed. 25µm diameter gold wire is to be preferred. Recommended circuit bonding table Label V1, V2 Type Vg Ref. : DSCHT46992090 - 30 Mar 12 Decoupling 120pF Comment Gain control Supply 10/12 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 CHT4699-99F 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. : DSCHT46992090 - 30 Mar 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 CHT4699-99F 36-44GHz Variable Attenuator 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. 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. Ordering Information Chip form: CHT4699-99F/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 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. : DSCHT46992090 - 30 Mar 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