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 AT-267 V4 Functional Schematic 5 4 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. 1 2 3 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 -40°C to +85°C -65°C to +150°C 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 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. • North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. Digital Attenuator, 1-Bit, 15 dB DC-2.0 GHz Electrical Specifications3: TA = 25°C, VC = +2.5 Volts, Z0 = 50 Ω Parameter Insertion Loss (Reference State) Attenuation VSWR Input IP3 AT-267 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 µA 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 — — — 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 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. • North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. 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 0.6 0.4 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 +85C -40C 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 AT-267 V4 Insertion Loss vs. Frequency over Temperature with Positive Control +25C +85C -40C Insertion Loss (dB) Insertion Loss (dB) 3.0 Frequency (GHz) Frequency (GHz) Attenuation vs. Frequency over Temperature with Negative Control +25C 17 16 15 14 13 12 0.0 0.5 1.0 1.5 2.0 2.5 3.0 +85C -40C 17 16 Attenuation vs. Frequency over Temperature with Positive Control +25C +85C -40C Attenuation (dB) Attenuation (dB) 15 14 13 12 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) VSWR, 0 and 15 dB States with Negative Control at +25°C 0dB 2.0 1.8 1.6 1.4 1.2 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 15dB VSWR, 0 and 15 dB States with Positive Control at +25°C 0dB 2.0 1.8 15dB VSWR VSWR 1.6 1.4 1.2 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) 3 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. • North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.