AT-267 Digital Attenuator, 1-Bit, 15 dB DC - 2.0 GHz Functional Schematic Features • • • • • Rev. V4 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 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. Ordering Information 1 Part Number Package AT-267TR Tape and Reel (1K Reel) AT-267TR-3000 Tape and Reel (3K Reel) AT-267SMB Sample Board 1. Reference Application Note M513 for reel size information. Pin Configuration Pin No. Function Pin No. Function 1 RF1 4 V1 2 Ground 5 V2 3 RF2 Absolute Maximum Ratings 2 Parameter Absolute Maximum Input Power +21 dBm Control Voltage ⏐VC⏐ ≤ 8V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 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 Rev. V4 Electrical Specifications3: TA = 25°C, VC = +2.5 Volts, Z0 = 50 Ω Parameter Test Conditions Units Min Typ Max Insertion Loss (Reference State) 1.0 GHz 2.0 GHz dB — — 0.3 0.4 0.4 0.5 Attenuation 1.0 GHz 2.0 GHz dB dB 14.6 14.4 15.1 14.9 15.6 15.4 VSWR 1.0 GHz 2.0 GHz Ratio Ratio — — 1.2:1 1.3:1 — — Input IP3 1.0 GHz Insertion Loss State Attenuation State dBm dBm 40 40 50 50 — — P1dB 1.0 GHz Insertion Loss State Attenuation State dBm dBm 24 20 26 23 — — Control Current — µA — — 10 Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 29 — Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS — 50 — Transients In-band mV — 10 — 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 1 39 pF 4 2 39 pF 3 39 pF Truth Table 4,5 Mode (Control) V1 V2 Attenuation Positive 4 0 ± 0.2V +2.5V to +5V +2.5V to +5V 0 ± 0.2V 15 dB Reference State Negative 5 0 ± 0.2V -2.5V to -5V -2.5V to -5V 0 ± 0.2V 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 Rev. V4 Typical Performance Curves Insertion Loss vs. Frequency over Temperature with Negative Control +25C Insertion Loss vs. Frequency over Temperature with Positive Control +85C -40C +25C 1.0 1.0 0.8 0.8 0.6 0.6 0.4 0.4 0.2 0.2 +85C -40C 0.0 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0.0 0.5 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 1.0 Attenuation vs. Frequency over Temperature with Positive Control +85C -40C +25C 17 17 16 16 15 15 14 14 13 13 12 +85C -40C 12 0.0 0.5 1.0 1.5 2.0 2.5 0.0 3.0 1.0 1.5 2.0 2.5 3.0 VSWR, 0 and 15 dB States with Positive Control at +25°C VSWR, 0 and 15 dB States with Negative Control at +25°C 0dB 0.5 F re que nc y ( G H z) F re que nc y ( G H z) 15dB 0dB 2.0 2.0 1.8 1.8 1.6 1.6 1.4 1.4 1.2 1.2 15dB 1.0 1.0 0.0 0.5 1.0 1.5 2.0 F re que nc y ( G H z) 2.5 3.0 0.0 1.0 2.0 3.0 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.