CHT4012-98F RoHS COMPLIANT DC-6GHz 6-BIT DIGITAL ATTENUATOR GaAs Monolithic Microwave IC Description The CHT4012-98F 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 amplitude error is typically as low as 0.3dB. The circuit provides low insertion loss 2.5dB associated to input and output return losses better than 14dB. 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 pHEMT process, 0.25µm gate length and electron beam gate lithography. It is available in chip form Main Features Frequency : 0.1GHz-6GHz ■ Broadband performances: DC-6GHz ■ Insertion Loss (state 0): 2.5dB ■ RMS attenuation error: 0.3dB ■ RMS phase variation: 1deg ■ DC bias: V+=5V and V-=-5V ■ No decoupling capacitance on Input and Output RF accesses ■ Chip size 2.41x1.41x0.1mm Main Characteristics Tamb.= +25°C Symbol Freq IL Rms_att_er Rms_phivar Parameter Frequency range Insertion Loss RMS of attenuation error RMS of phase variation (0.1 to 6GHz) Ref. : DSCHT40121069 - 10 Mar 11 1/14 Min DC Typ 2.5 0.3 1 Max 6 Unit GHz dB dB ° Specifications subject to change without notice United Monolithic Semiconductors S.A.S. Route Départementale 128 - BP46 - 91401 Orsay Cedex France Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 CHT4012-98F DC-6GHz 6-BIT DIGITAL ATTENUATOR Main Characteristics Tamb.= +25°C Symbol Freq Parameter Min Operating frequency IL Typ DC Max Unit 6 GHz Insertion Loss 2.5 dB S11 Input Return Loss -16 dB S22 Output Return Loss -14 dB Input power at 1dB gain compression 20 dBm P1dB Dyn Dynamic 31.5 dB LSB Attenuator elementary step 0.5 dB -0.5/+0.5 dB 0.3 dB -5 / +1 ° 1 ° V Att_er Rms_att_er Phivar Rms_phivar Attenuation error RMS of attenuation error Phase variation (0.1 to 6GHz) RMS of phase variation (0.1 to 6GHz) V+ Positive supply voltage 5 V- Negative supply voltage -5 -4 V Vctrl_L Control voltage low level 0 0.4 V Vctrl_H Control voltage high level 7 V I_V+ Positive supply DC current 5 mA I_V- Negative supply DC current 5 mA 2.4 These values are representative of measurements in test fixture Ref. : DSCHT40121069 - 10 Mar 11 2/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-98F Definitions n: Attenuator state index with 0 ≤ n ≤ 63 Phase_S21(n): Measured phase of S21 in degree at attenuation state n dB_S21(n): Measured magnitude of S21 in dB at attenuation stateni Attenuation Error (Att_err) Att_err(n)= dB_S21 (n) - dB_S21(0) –0.5xn (dB) The translation of Att_err(i) from dB to linear is given by: Att_err_lin(n) = 10 Att _ err ( n ) 20 Phase variation (Phivar) Phivar(n) = Phase_S21(n) - Phase_S21(0) (°) RMS Attenuation Error (Rms_att) Rms_att = 20 log 1 1 63 . (1 Att _ err _ lin(n))2 64 n 0 (dB) RMS Phase variation (Rms_Phivar) 63 ( Phi var( n))2 Rms_Phivar = n 0 64 (°) Absolute Maximum Ratings (1) Tamb.= +25°C Symbol 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 Storage temperature range -55 to +150 °C Tstg (1) Parameter Operation of this device above anyone of these parameters may cause permanent damage. Ref. : DSCHT40121069 - 10 Mar 11 3/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice CHT4012-98F DC-6GHz 6-BIT DIGITAL ATTENUATOR Typical on-wafer Sij parameters at State 0 Tamb.= +25°C, V+ = +5V, V-=-5V Freq S11 PhS11 S12 (GHz) (dB) (°) (dB) 0.2 -20.21 0.1 -1.69 0.4 -20.33 -9.2 -1.75 0.6 -20.90 -20.2 -1.81 0.8 -20.77 -32.0 -1.87 1.0 -20.75 -40.7 -1.90 1.2 -20.45 -48.7 -1.93 1.4 -20.59 -54.5 -1.97 1.6 -20.92 -61.5 -2.03 1.8 -21.15 -69.9 -2.07 2.0 -21.24 -77.4 -2.11 2.2 -21.34 -84.7 -2.15 2.4 -21.48 -90.7 -2.21 2.6 -21.80 -94.9 -2.25 2.8 -22.62 -100.6 -2.30 3.0 -23.17 -106.8 -2.35 3.2 -23.97 -113.1 -2.40 3.4 -24.56 -120.1 -2.44 3.6 -25.40 -123.3 -2.49 3.8 -26.78 -125.4 -2.54 4.0 -28.80 -125.6 -2.59 4.2 -31.95 -128.2 -2.62 4.4 -35.79 -128.9 -2.69 4.6 -42.02 -100.1 -2.74 4.8 -42.57 -39.9 -2.79 5.0 -34.86 -19.8 -2.84 5.2 -30.17 -9.9 -2.89 5.4 -27.13 -7.3 -2.96 5.6 -24.54 -5.9 -3.03 5.8 -22.91 -7.6 -3.07 6.0 -21.40 -11.8 -3.14 6.2 -20.12 -17.1 -3.21 6.4 -18.82 -22.2 -3.28 6.6 -17.69 -24.7 -3.35 6.8 -16.78 -28.2 -3.41 7.0 -16.01 -30.9 -3.49 7.2 -15.35 -34.9 -3.56 7.4 -14.54 -38.7 -3.65 7.6 -13.93 -42.1 -3.71 7.8 -13.18 -46.1 -3.77 8.0 -12.71 -48.8 -3.87 Ref. : DSCHT40121069 - 10 Mar 11 PhS12 (°) -5.6 -9.9 -14.2 -18.3 -22.5 -26.7 -30.9 -35.2 -39.4 -43.7 -47.8 -52.0 -56.1 -60.3 -64.5 -68.7 -72.8 -76.9 -81.0 -85.1 -89.3 -93.4 -97.6 -101.7 -105.9 -109.9 -114.1 -118.3 -122.5 -126.6 -130.6 -134.8 -138.9 -143.1 -147.2 -151.4 -155.5 -159.5 -163.6 -167.8 4/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 S21 (dB) -1.69 -1.75 -1.82 -1.88 -1.90 -1.94 -1.98 -2.04 -2.07 -2.11 -2.15 -2.21 -2.25 -2.30 -2.35 -2.40 -2.44 -2.49 -2.54 -2.60 -2.63 -2.69 -2.72 -2.79 -2.84 -2.90 -2.95 -3.02 -3.08 -3.14 -3.21 -3.27 -3.35 -3.41 -3.49 -3.56 -3.63 -3.71 -3.77 -3.87 PhS21 (°) -5.6 -9.9 -14.1 -18.3 -22.6 -26.8 -31.0 -35.3 -39.6 -43.8 -47.8 -52.1 -56.3 -60.4 -64.6 -68.7 -72.9 -76.9 -81.1 -85.2 -89.3 -93.5 -97.6 -101.8 -105.9 -110.1 -114.1 -118.4 -122.6 -126.6 -130.8 -134.9 -139.1 -143.1 -147.3 -151.4 -155.6 -159.6 -163.8 -168.0 S22 (dB) -20.37 -20.27 -20.25 -19.96 -19.67 -19.33 -19.26 -19.21 -19.08 -18.96 -18.86 -18.60 -18.46 -18.30 -18.26 -18.19 -17.92 -17.75 -17.59 -17.52 -17.34 -17.22 -17.00 -16.68 -16.44 -16.17 -16.03 -15.72 -15.40 -15.05 -14.69 -14.38 -14.00 -13.77 -13.35 -13.05 -12.73 -12.36 -12.13 -11.82 PhS22 (°) -0.3 -8.8 -18.0 -27.4 -35.5 -41.9 -48.4 -55.4 -60.8 -65.8 -70.0 -74.1 -78.1 -81.8 -84.9 -88.0 -90.8 -93.7 -95.7 -97.8 -99.0 -100.4 -101.1 -102.1 -103.6 -104.5 -105.6 -107.0 -108.7 -109.6 -111.4 -112.5 -114.3 -116.3 -117.8 -120.4 -122.3 -124.7 -127.3 -129.9 Specifications subject to change without notice DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-98F Typical Measurements in test fixture: [S] parameters T= +25°C, V+ = +5V, V- = -5V S21 versus Frequency Attenuator state 0 S11 versus Frequency All attenuator states Ref. : DSCHT40121069 - 10 Mar 11 S22 versus Frequency All attenuator states 5/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice CHT4012-98F DC-6GHz 6-BIT DIGITAL ATTENUATOR Typical Measurements in test fixture: Attenuator performances: Attenuation error T= +25°C, V+ = +5V, V- = -5V Attenuation error versus frequency All attenuator states Attenuation error versus Attenuator state 0.1GHz < Freq. < 6GHz RMS Attenuation error Attenuation versus Attenuator state 0.1GHz < Freq. < 6GHz Ref. : DSCHT40121069 - 10 Mar 11 6/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-98F Typical Measurements in test fixture: Attenuator performances: Phase variation T= +25°C, V+ = +5V, V- = -5V RMS of Phase variation Phase variation versus Frequency All attenuator states Ref. : DSCHT40121069 - 10 Mar 11 Phase variation versus Attenuator state 0.1GHz < Freq. < 6GHz 7/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice CHT4012-98F DC-6GHz 6-BIT DIGITAL ATTENUATOR Typical Measurements in test fixture: Attenuator performances: Phase variation T= +25°C, V+ = +5V, V- = -5V Variation of the Gain versus Frequency Attenuator states: 0 / 1/ 2 / 4 / 8 / 16 / 32 / 63 Input power: -5 to 22dBm Ref. : DSCHT40121069 - 10 Mar 11 Variation of the gain versus Input power Attenuator states: 0 / 1/ 2 / 4 / 8 / 16 / 32 / 63 Frequency: 0.25GHz to 6GHz 8/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-98F Mechanical dimensions and pad allocation Chip thickness = 100µm +/- 10µm. RF pads (1, 14) = 122 x 100µm² DC and control pads (2, 4, 6, 7, 8, 9, 10, 13, 12, 15, 16) = 100 x 100µm² Pin number 1 2 4 6 7 8 9 10 13 14 3, 5 11 12, 15, 16 Pad name IN A1 A2 A3 A4 A5 A6 VV+ OUT V+ GND Description Input RF: Attenuator bit 1 Attenuator bit 2 Attenuator bit 3 Attenuator bit 4 Attenuator bit 5 Attenuator bit 6 -5V supply voltage: interface +5V supply voltage: interface (1) Output RF NC NC (1) 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 Ref. : DSCHT40121069 - 10 Mar 11 9/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice CHT4012-98F DC-6GHz 6-BIT DIGITAL ATTENUATOR Bonding recommendations Port Connection IN (1) OUT (14) Inductance (Lbonding) = 0.3nH one wire: diameter 25µm, length 0.4mm DC and Interface pads Inductance (Lbonding) = 0.8nH one wire: diameter 25µm, length 1.0mm 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. Ref. : DSCHT40121069 - 10 Mar 11 10/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-98F Bonding recommendations Pin number 2 4 6 7 8 9 10 13 Pad name A1 A2 A3 A4 A5 A6 VV+ Value 0V / 3.3V or 0V / 5V 0V / 3.3V or 0V / 5V 0V / 3.3V or 0V / 5V 0V / 3.3V or 0V / 5V 0V / 3.3V or 0V / 5V 0V / 3.3V or 0V / 5V -5V +5V NOTE: Control voltages of the attenuator bits are both CMOS and TTL compatible Ref. : DSCHT40121069 - 10 Mar 11 11/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice CHT4012-98F DC-6GHz 6-BIT DIGITAL ATTENUATOR Attenuator control table Voltage to apply on the pads A1 to A6: state A6 A5 A4 A3 A2 A1 state 0 Att (dB) 0 A6 A5 A4 A3 A2 A1 33 Att (dB) 16.5 0 0 0 0 0 0 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 Ref. : DSCHT40121069 - 10 Mar 11 12/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-98F Note Ref. : DSCHT40121069 - 10 Mar 11 13/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice CHT4012-98F DC-6GHz 6-BIT DIGITAL 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. Ordering Information Chip form: CHT4012-98F/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. : DSCHT40121069 - 10 Mar 11 14/14 Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09 Specifications subject to change without notice