AT20-0273 Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Rev. V6 Features • Attenuation: 16 dB steps to 32 dB • Temperature Stability: ± 0.18 dB from –40°C to +85°C Typical • Low DC Power Consumption • Surface Mount Package • Integral TTL Driver • Low Cost/High Performance • 50 Ohm Nominal Impedance • Lead-Free CR-11 Package • 260°C Reflow Compatible • RoHS* Compliant Functional Schematic1 RF2 RF1 GND GND 16 dB GND GND GND GND 16 dB Vee GND Vcc C1 NC GND Orientation Mark PIN 16 NC 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. Ordering Information Part Number Package AT20-0273 Bulk Packaging Note: Reference Application Note M513 for reel size information. Function Pin No. Function 1 C2 9 RF1 2 GND 10 GND 3 C1 11 GND 4 GND 12 GND 5 GND 13 Vee 6 GND 14 Vcc 7 GND 15 NC 8 RF2 16 NC 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 Rev. V6 Electrical Specifications: TA = 25°C2 Parameter Test Conditions Frequency Units Min Typ Max Reference Insertion Loss — DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz dB dB dB — — — 1.2 1.3 1.5 1.6 1.7 1.9 Attenuation Accuracy 3 C1 Bit Full Attenuation (32 dB) DC - 2.0 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz VSWR — DC - 2.0 GHz Ratio — — 1.4:1 Trise, Tfall 10% to 90% — ns — 50 — Ton, Toff 50% Control to 90/10% RF — ns — 150 — 2. 3. ± 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 Transients In-Band (peak-peak) — mV — 50 — 1 dB Compression Input Power Input Power 0.05 GHz 0.5 - 2.0 GHz dBm dBm — — +20 +28 — — Input IP3 For two-tone Input Power Up to +5 dBm 0.05 GHz 0.5 - 2.0 GHz dBm dBm — — +38 +48 — — Input IP2 For two-tone Input Power Up to +5 dBm 0.05 GHz 0.5 - 2.0 GHz dBm dBm — — +44 +68 — — Vcc — — V 4.5 5.0 5.5 Vee — — V -8.0 — -5.0 Icc Vcc = 4.5 to 5.5V Vctl = 0 to 0.8V, or Vcc –2.1V to Vcc — mA — — 2.0 Iee Vee = -5.0 to -8.0V — mA — — 1.0 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 Absolute Maximum Max Input Power 0.5 GHz 0.5 - 2.0 GHz +27 dBm +34 dBm VCC -0.5V ≤ VCC ≤ +7.0V VEE -8.5V ≤ VEE ≤ +0.5V VCC - VEE -0.5V ≤ VCC - VEE ≤ 14.5V Vin 4. 5. 6. 6 -0.5V ≤ Vin ≤ VCC + 0.5V Operating Temperature -40°C to +125°C Storage Temperature -65°C to +150°C 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 Rev. V6 Truth Table (Digital Attenuator) Handling Procedures Control Input 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 devices. C2 C1 Attenuation 0 0 Reference 0 1 16 dB 1 1 32 dB 0 = TTL Low; 1 = TTL High Typical Performance Curves Attenuation Accuracy vs. Frequency Ref. Insertion Loss vs. Frequency + 8 5 °C + 2 5 °C - 55 °C F ull A t t enuat io n Deviation from Nominal Atten (dB) 5 Loss (dB) 4 3 2 1 0 0.0 0.5 1.0 1.5 2.0 2.5 3 Fre que ncy (GHz ) 16 d B b it 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 Fre quency (GHz ) VSWR vs. Frequency F ull A t t enuat io n 16 d B St at e 3 2 d B St at e 2.00 V SW R 1.80 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 Rev. V6 Lead-Free, CR-11 Ceramic Package† † 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.