MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Features 6-bit, 0.5 dB LSB, 31.5 dB range DC to 40 GHz operation Integrated TTL 0/+5V control +/- 0.5 dB typical bit error Low RMS phase 4.3° @ 20 GHz Die size: 1.55 x 0.95 x 0.1 mm ESD protection for all controls and bias 100% On-wafer DC & RF Tested Rev. V1 Functional Schematic GND GND RFIN GND 10 8 RFOUT 9 0.5 dB GND 1 dB 2 dB 4 dB 8 dB 16 dB GND VCC 7 Description The MAAD-011021 is a wide band 6-bit digital attenuator covering DC to 40 GHz. The attenuation bit-values are 0.5 dB LSB (least significant bit), 1, 2, 4, 8, and 16 dB for a total attenuation of 31.5 dB. Attenuation error is typically less than +/- 0.5 dB, RMS phase error is less than 5 degrees at 20 GHz, and typical insertion loss is 7.1 dB at 15 GHz. Return loss is typically 12 dB across all frequencies and attenuation states. Bulk Die MAAD-011021-0GPDIE Die in Gel Pack MAAD-011021-DIESMB Die on Sample Board 4 5 6 V1 V2 V3 V4 V5 V6 Pad Name Function 1 V1 0.5 dB bit control 2 V2 1 dB bit control 3 V3 2 dB bit control 4 V4 4 dB bit control 5 V5 8 dB bit control 6 V6 16 dB bit control 7 VCC -5 V Bias 8 RFIN RF Input 9 RFOUT RF Output 10 GND RF and DC Ground 11 Pad2 Back of die Ordering Information MAAD-011021-000DIE 3 Pad No. The device is also available in a lead-free 3 mm 16-lead PQFN plastic package; order part number MAAD-011021-TR0500. Package 2 Pad Configuration The attenuator integrates an inverter to allow a single control for series/shunt attenuation. Inverter requires a -5 V supply (VCC) and 17 mA typical, logic is 0 V / +5 V. Part Number 1 2. The pad on the backside of the die must be connected to RF, DC and thermal ground. 1. All sample boards include 3 loose parts. * Restrictions on Hazardous Substances, European Union Directive 2011/65/EU. 1 M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Rev. V1 Electrical Specifications: TA = +25°C, VCC = -5 V, Z0 = 50 Ω (unless otherwise specified) Parameter Test Conditions Units Min. Typ. Max. Insertion Loss DC - 20 GHz 20 - 40 GHz 10 GHz 20 GHz 30 GHz dB — 6.4 8.8 6.0 7.0 8.0 — — 7.0 8.0 9.0 Return Loss DC - 40 GHz dB — 15 — Attenuation Bits 20 GHz LSB: 0.5 dB Bit 2: 1 dB Bit 3: 2 dB Bit 4: 4 dB Bit 5: 8 dB Bit 6: 16 dB 0.3 0.7 1.7 3.6 7.0 16.0 0.4 0.9 1.8 3.8 8.0 17.4 0.5 1.0 1.9 4.0 9.0 19.0 dB Attenuation Error RMS DC - 20 GHz 20 - 40 GHz dB — 0.3 1.2 — Phase Error RMS DC - 20 GHz 20 - 40 GHz deg — 2.6 7.2 — Input P0.1dB DC - 40 GHz dBm — 24 — Input IP3 DC - 40 GHz dBm — 38 — Switching Time DC - 40 GHz ns — 45 — Control Logic DC - 40 GHz V — 0/+5 — Control Current each control bit @ +5 V mA — 6 — Supply Current DC - 40 GHz mA — 17 45 Absolute Maximum Ratings3,4 Parameter Absolute Maximum Input Power +35 dBm Operating Voltage -5 V Control Voltage 0 / +5 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 3. Exceeding any one or combination of these limits may cause permanent damage to this device. 4. MACOM does not recommend sustained operation near these survivability limits. Handling Procedures Please observe the following precautions to avoid damage: Static Sensitivity Gallium Arsenide Integrated Circuits are sensitive to electrostatic discharge (ESD) and can be damaged by static electricity. Proper ESD control techniques should be used when handling these Class 1A devices. 2 M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Rev. V1 Truth Table5,6 V1 0.5 dB V2 1 dB V3 2 dB V4 4 dB V5 8 dB V6 16 dB State low low low low low low 0 dB high low low low low low 0.5 dB low high low low low low 1 dB low low high low low low 2 dB low low low high low low 4 dB low low low low high low 8 dB low low low low low high 16 dB high high high high high high 31.5 dB 5. high = +5 V @ 5.7 mA, low = 0 V @ 1.0 mA. 6. Any combination of the above states will provide attenuation approximately equal to the sum of the bits selected. Die Layout Bond Pad Opening Detail Pad Size (x) µm Size (y) µm A-F 64 64 G, N 64 59 H, M 64 139 I, L 64 87 J 89 57 K 69 69 3 M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Rev. V1 Typical Performance Curves P0.1dB Compression Insertion Loss 0 30 +25°C -40°C +85°C -4 +25°C -40°C +85°C 28 26 -8 24 -12 -16 22 0 10 20 30 40 50 20 0 10 20 Frequency (GHz) 40 50 Maximum Output Return Loss (all states) Maximum Input Return Loss (all states) 0 0 +25°C -40°C +85°C -4 -8 -12 -12 0 10 20 30 40 +25°C -40°C +85°C -4 -8 -16 30 Frequency (GHz) 50 -16 0 10 20 Frequency (GHz) 30 40 50 Frequency (GHz) Input IP3 (reference states) Noise Figure (reference states) 60 12 10 +25°C -40°C +85°C 50 8 40 6 30 4 20 10 4 2 0 10 20 30 Frequency (GHz) 40 50 0 0 5 10 15 20 25 30 35 Frequency (GHz) M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport 40 MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Rev. V1 Typical Performance Curves Attenuation Relative Attenuation 0 0 -5 -4 -10 -8 -15 -20 REF Bit 1 Bit 2 Bit 3 -12 -25 REF Bit 1 Bit 2 Bit 3 -30 -35 0 -16 Bit 4 Bit 5 Bit 6 10 20 30 40 50 -20 0 10 Frequency (GHz) 25 4 20 3 15 2 10 1 5 10 30 40 50 40 50 40 50 RMS Phase Error 5 0 20 Frequency (GHz) RMS Attenuation Error 0 Bit 4 Bit 5 Bit 6 20 30 40 50 0 0 10 Frequency (GHz) 20 30 Frequency (GHz) Relative Phase Error Relative Attenuation Error 2 40 REF Bit 1 Bit 2 Bit 3 1 20 0 -1 Bit 4 Bit 5 Bit 6 0 -2 REF Bit 1 Bit 2 Bit 3 -3 -4 0 10 -20 Bit 4 Bit 5 Bit 6 20 30 40 Frequency (GHz) 50 -40 0 10 20 30 Frequency (GHz) 5 M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Rev. V1 Typical Performance Curves Relative Attenuation Error (Bit 1, 2) Relative Phase Error (Bit 1, 2) 40 2 30 1 Bit 1 Bit 2 20 0 10 0 -1 -10 Bit 1 Bit 2 -2 -20 -3 -4 -30 0 10 20 30 40 50 -40 0 10 20 30 40 50 40 50 40 50 Frequency (GHz) Frequency (GHz) Relative Phase Error (Bit 3, 4) Relative Attenuation Error (Bit 3, 4) 2 40 30 1 Bit 3 Bit 4 20 0 10 -1 0 -10 Bit 3 Bit 4 -2 -20 -3 -4 -30 0 10 20 30 40 50 -40 0 10 20 Frequency (GHz) Relative Phase Error (Bit 5, 6) Relative Attenuation Error (Bit 5, 6) 2 40 30 1 Bit 5 Bit 6 20 0 10 -1 0 -2 -10 Bit 5 Bit 6 -20 -3 -4 30 Frequency (GHz) -30 0 10 20 30 Frequency (GHz) 40 50 -40 0 10 20 30 Frequency (GHz) 6 M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Rev. V1 Typical Performance Curves Step Error Between Successive States Switching Time 3 5 GHz 10 GHz 20 GHz 30 GHz 2 1 0 -1 -2 -3 0 5 10 15 20 25 30 35 7 0 6 -5 5 -10 4 Control Voltage (L) -15 3 S21 (R) -20 2 -25 1 -30 0 -35 -1 -100 -50 0 50 100 150 200 250 -40 300 Time (ns) Attenuation State (dB) Phase Error over Attenuation States 20 15 10 5 0 -5 1 GHz 3 GHz 5 GHz 10 GHz 20 GHz -10 -15 -20 0 5 10 15 20 25 30 35 Attenuation State (dB) 7 M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport MAAD-011021-000DIE Digital Attenuator, 6-Bit, 0.5 dB LSB step DC - 40 GHz Rev. V1 Applications Section Application Information Mounting and Bonding Techniques The MAAD-011021 is designed for extremely wide band and robust attenuation applications. It uses a combination of series and shunt cold channel, multiple-gate FETs to achieve high linearity and accurate attenuation repeatability. We recommend using double bonds at both RF input and output, as well as keeping bondwires as short as possible to ensure higher frequency operation. This part is the most accurate for X-band applications. The Monolithic Circuit is designed for robust and reliable usage. The die features complete passivation on all critical areas as well as a protective BCB die coat. The MAAD-011021 has a built in inverter function which allows a single +5 V / 0 V single control for each bit. This is useful if you require very fast switching times and have +5 V / 0 V available. The MAAD-011021 is DC-coupled at both RFIN and RFOUT. If operation at DC is desired, 0 Ω jumpers (or continuous 50 Ω RF lines) should be used in series with RFIN and RFOUT. Customer should take extra care to ensure that the voltage at both RF IN and RFOUT are 0 V; excess voltage can damage the part. If operation at DC is not required, simply use series blocking capacitors. The die should be attached directly to the ground plane with silver conductive epoxy for best results. A true 50 Ω microstrip or co-planar waveguide is recommended for bringing RF to and from the die as shown in the demonstration board below. This board uses 0.200 mm (8 mils) Rogers 4350 as the top dielectric layer. Alternatively one can mount the die directly to the ground plane and launch with microstrip substrates in either alumina or Rogers to the same level as the top of the die, allowing for shorter bond wires. The RF input and output pads are DC coupled. Blocking capacitors are required if there is a DC potential on either port. PCB Layout Sample board size above is 28 x 25 mm 8 M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macomtech.com for additional data sheets and product information. For further information and support please visit: https://www.macomtech.com/content/customersupport