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| AT20-0273 Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Features * Attenuation: 16 dB steps to 32 dB * Temperature Stability: 0.18 dB from -40C to +85C Typical * Low DC Power Consumption * Surface Mount Package * Integral TTL Driver * Low Cost/High Performance * 50 Ohm Nominal Impedance * Lead-Free CR-11 Package * 260C Reflow Compatible * RoHS* Compliant Rev. V6 Functional Schematic1 RF1 GND GND GND Vee Vcc NC PIN 16 NC 16 dB 16 dB RF2 GND GND GND GND C1 GND Orientation Mark C2 PIN 1 Description M/A-COM's AT20-0273 is a GaAs FET digital attenuator with a 16 dB minimum step size and 32 dB total attenuation. This attenuator and integral TTL driver is in a sealed ceramic 16-lead surface mount package. The AT20-0273 is ideally suited for use where accuracy, fast switching, very low power consumption and low intermodulation products are required. Typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits. Available with enhanced performance as fully hermetic version. Environmentally screenable as P/N AT-273-PIN. 1. Use the C1 control for a single 16-dB bit. Pin Configuration Pin No. 1 2 3 4 Function C2 GND C1 GND GND GND GND RF2 Pin No. 9 10 11 12 13 14 15 16 Function RF1 GND GND GND Vee Vcc NC NC Ordering Information Part Number AT20-0273 5 6 Package Bulk Packaging 7 8 Note: Reference Application Note M513 for reel size information. The metal bottom of the case must be connected to RF and DC ground. * Restrictions on Hazardous Substances, European Union Directive 2002/95/EC. 1 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 * Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, * India Tel: +91.80.4155721 * China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT20-0273 Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Electrical Specifications: TA = 25C2 Parameter Reference Insertion Loss Rev. V6 Test Conditions -- Frequency DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 2.0 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 2.0 GHz -- -- -- 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz -- -- -- -- Units dB dB dB Min -- -- -- Typ 1.2 1.3 1.5 Max 1.6 1.7 1.9 Attenuation Accuracy 3 C1 Bit Full Attenuation (32 dB) 3% of attenuation setting in dB 3% of attenuation setting in dB 3% of attenuation setting in dB, -1 dB 3% of attenuation setting in dB, -3 dB Ratio ns ns mV dBm dBm dBm dBm dBm dBm V V mA mA -- -- -- -- -- -- -- -- -- -- 4.5 -8.0 -- -- -- 50 150 50 +20 +28 +38 +48 +44 +68 5.0 -- -- -- 1.4:1 -- -- -- -- -- -- -- -- -- 5.5 -5.0 2.0 1.0 VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 Input IP2 Vcc Vee Icc Iee 2. 3. -- 10% to 90% 50% Control to 90/10% RF In-Band (peak-peak) Input Power Input Power For two-tone Input Power Up to +5 dBm For two-tone Input Power Up to +5 dBm -- -- Vcc = 4.5 to 5.5V Vctl = 0 to 0.8V, or Vcc -2.1V to Vcc Vee = -5.0 to -8.0V All specifications apply when operated with bias voltages of +5V for Vcc and -5.0V for Vee. This attenuator is guaranteed monotonic. Absolute Maximum Ratings 4,5 Parameter Max Input Power 0.5 GHz 0.5 - 2.0 GHz VCC VEE VCC - VEE Vin 6 Absolute Maximum +27 dBm +34 dBm -0.5V VCC +7.0V -8.5V VEE +0.5V -0.5V VCC - VEE 14.5V -0.5V Vin VCC + 0.5V -40C to +125C -65C to +150C Operating Temperature Storage Temperature 4. 5. 6. Exceeding any one or combination of these limits may cause permanent damage to this device. M/A-COM does not recommend sustained operation near these survivability limits. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 2 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 * Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, * India Tel: +91.80.4155721 * China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT20-0273 Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Truth Table (Digital Attenuator) Handling Procedures Please observe the following precautions to avoid damage: Control Input C2 0 0 1 0 = TTL Low; 1 = TTL High Rev. V6 C1 0 1 1 Attenuation Reference 16 dB 32 dB 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 devices. Typical Performance Curves Ref. Insertion Loss vs. Frequency + 8 5 C 5 + 2 5 C - 55 C Attenuation Accuracy vs. Frequency F ull A t t enuat io n 16 d B b it Deviation from Nominal Atten (dB) 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -5.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 4 Loss (dB) 3 2 1 0 0.0 0.5 1.0 1.5 2.0 2.5 3 Fre que ncy (GHz ) Fre quency (GHz ) VSWR vs. Frequency F ull A t t enuat io n 2.00 1.80 16 d B St at e 3 2 d B St at e V SW R 1.60 1.40 1.20 1.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) 3 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 * Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, * India Tel: +91.80.4155721 * China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT20-0273 Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Lead-Free, CR-11 Ceramic Package Rev. V6 Reference Application Note M538 for lead-free solder reflow recommendations. 4 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 * Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, * India Tel: +91.80.4155721 * China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. |
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