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| AT-267 Digital Attenuator, 1-Bit, 15 dB DC - 2.0 GHz Features * * * * * Single 15-dB Step Low Loss, 0.3 dB Typical @ 900 MHz 2.5 to 5.0 Volt Operation SOT-25 Plastic Package Tape and Reel Packaging Available Rev. V4 Functional Schematic Description M/A-COM's AT-267 is a 1-bit, 15-dB step GaAs MMIC digital attenuator in a low cost SOT-25, 5 lead surface mount plastic package. The AT-267 is ideally suited for use where high accuracy, very low power consumption and low intermodulation products are required. Typical applications include wireless handsets, base stations, wireless LAN equipment, GPS receivers and any RF applications with automatic gain/level control circuits. The AT-267 is fabricated as a monolithic GaAs integrated circuit using a mature PHEMT process. The process features full chip passivation for performance and reliability. Pin Configuration Pin No. 1 2 3 Function RF1 Ground RF2 Pin No. 4 5 Function V1 V2 Ordering Information 1 Part Number AT-267TR AT-267TR-3000 AT-267SMB Package Tape and Reel (1K Reel) Tape and Reel (3K Reel) Sample Board Absolute Maximum Ratings 2 Parameter Input Power Control Voltage Operating Temperature Storage Temperature Absolute Maximum +21 dBm VC 8V -40C to +85C -65C to +150C 1. Reference Application Note M513 for reel size information. 2. Exceeding any one or combination of these limits may cause permanent damage to this device. 1 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. 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. AT-267 Digital Attenuator, 1-Bit, 15 dB DC - 2.0 GHz Electrical Specifications3: TA = 25C, VC = +2.5 Volts, Z0 = 50 Parameter Insertion Loss (Reference State) Attenuation VSWR Rev. V4 Test Conditions 1.0 GHz 2.0 GHz 1.0 GHz 2.0 GHz 1.0 GHz 2.0 GHz 1.0 GHz Insertion Loss State Attenuation State 1.0 GHz Insertion Loss State Attenuation State -- 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In-band Units dB dB dB Ratio Ratio dBm dBm dBm dBm A nS nS mV Min -- -- 14.6 14.4 -- -- 40 40 24 20 -- -- -- -- Typ 0.3 0.4 15.1 14.9 1.2:1 1.3:1 50 50 26 23 -- 29 50 10 Max 0.4 0.5 15.6 15.4 -- -- -- -- -- -- 10 -- -- -- Input IP3 P1dB Control Current Trise, Tfall Ton, Toff Transients 3. For positive voltage control, external DC blocking capacitors are required on all RF ports (pins 1, 2 and 3). SOT-25 Positive Control Voltage Schematic 5 4 1 2 3 39 pF 39 pF 39 pF Truth Table 4,5 Mode (Control) Positive 4 Negative 5 V1 0 0.2V +2.5V to +5V 0 0.2V -2.5V to -5V V2 +2.5V to +5V 0 0.2V -2.5V to -5V 0 0.2V Attenuation 15 dB Reference State Reference State 15 dB 4. External DC blocking capacitors are required as noted. 5. If negative control is used, DC blocking capacitors are not required on RF ports and ground. 2 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. 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. AT-267 Digital Attenuator, 1-Bit, 15 dB DC - 2.0 GHz Typical Performance Curves Insertion Loss vs. Frequency over Temperature with Negative Control +25C 1.0 0.8 +85C -40C 1.0 0.8 Rev. V4 Insertion Loss vs. Frequency over Temperature with Positive Control +25C +85C -40C 0.6 0.4 0.6 0.4 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 F re que nc y ( G H z) F re que nc y ( G H z) Attenuation vs. Frequency over Temperature with Negative Control +25C 17 16 15 +85C -40C Attenuation vs. Frequency over Temperature with Positive Control +25C 17 16 +85C -40C 15 14 14 13 12 0.0 0.5 1.0 1.5 2.0 2.5 3.0 13 12 0.0 0.5 1.0 1.5 2.0 2.5 3.0 F re que nc y ( G H z) F re que nc y ( G H z) VSWR, 0 and 15 dB States with Negative Control at +25C 0dB 2.0 1.8 1 5dB VSWR, 0 and 15 dB States with Positive Control at +25C 0dB 2.0 1.8 1.6 1.4 1.2 1.0 15dB 1.6 1.4 1.2 1.0 0.0 0.5 1 .0 1 .5 2.0 2.5 3.0 0.0 1.0 2.0 3.0 F re que nc y ( G H z) F re que ncy ( G H z) 3 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. 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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