Voltage Variable Absorptive Attenuator 12 dB, DC-2.0 GHz Features • • • • • • • • AT-250 V4 Functional Schematic 12 dB Voltage Variable Attenuation Low Intermodulation Products Low DC Power Consumption: 50 µW Single Voltage Control: 0 to -4 Volts Nanosecond Switching Speed Temperature Range: -40°C to +85°C SOIC-8 Plastic Package Tape and Reel Packaging Available RF2 GND GND GND 8 7 6 5 1 2 3 4 RF1 GND GND VC Description M/A-COM’s AT-250 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOIC 8lead surface mount plastic package. The AT-250 is ideally suited for use where attenuation fine tuning, fast switching and very low power consumption are required. Typical applications include radio, cellular, GPS equipment and other automatic gain/level control circuits. The AT-250 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. Ordering Information Part Number Package AT-250 SOIC 8-Lead Plastic Package AT-250TR Forward Tape and Reel Note: Reference Application Note M513 for reel size information. Pin Configuration Pin No. Function Pin No. Function 1 RF1 5 Ground 2 Ground 6 Ground 3 Ground 7 Ground 4 VC 8 RF2 Absolute Maximum Ratings 1 Parameter Absolute Maximum Input Power +21 dBm Control Voltage +5V, -8.5V Operating Temperature -40°C to +85°C Storing Temperature -65°C to +150°C 1. 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. Voltage Variable Absorptive Attenuator 12 dB, DC-2.0 GHz AT-250 V4 Electrical Specifications: TA = 25°C, Z0 = 50 Ω Parameter Test Conditions2 Units Min Typ Max Insertion Loss DC - 0.1 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz dB dB dB dB — — — — 2.9 3.0 3.2 3.4 3.1 3.2 3.5 3.8 Flatness (Peak to Peak) DC - 0.1 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz dB dB dB dB — — — — + 0.1 + 0.2 + 0.5 + 1.2 + 0.3 + 0.4 + 0.8 + 1.5 Ratio — 2.1:1 — VSWR Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 3 — Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS — 5 — Transients In Band mV — 10 — Power Handling Linear Operation Absolute Maximum Input Power dBm dBm — — 13 21 — — IP2 0.05 GHz 0.5 - 2.0 GHz Measured Relative to Input Power (For two-tone Input Power Up to +5 dBm) dBm dBm 28 40 34 47 — — IP3 0.05 GHz 0.5 - 2.0 GHz Measured Relative to Input Power (For two-tone Input Power Up to +5 dBm) dBm dBm 18 18.5 313 363 — — 2. Control voltage: 0 to -4 volts @ 20 µA typical. 3. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply. SOIC-8 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. Voltage Variable Absorptive Attenuator 12 dB, DC-2.0 GHz AT-250 V4 Typical Performance Curves Insertion Loss vs. Frequency Attenuation vs. Frequency 4 20 Atten5 Atten10 Atten15 3 15 +25°C -40°C +85°C 2 10 1 5 0 0.0 0.5 1.0 1.5 2.0 0 0.0 0.5 Frequency (GHz) 1.0 1.5 2.0 Frequency (GHz) VSWR vs. Frequency Attenuation vs. Control Voltage, F = 950 MHz 2.0 15 1.8 10 1.6 0 dB 12 dB 5 dB 1.4 5 1.2 1.0 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) 0 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 Control Voltage (V) Phase vs. Control Voltage, F = 950 MHz 30 20 10 0 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 Control Voltage (V) 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.