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| Voltage Variable Absorptive Attenuator 35 dB, 0.5-2.0 GHz Features * * * * * * * Single Positive Voltage Control: 0 to +5 Volts 35 dB Attenuation Range at 0.9 GHz 2 dB Linearity from BSL Low DC Power Consumption Temperature Range: -40C to +85C SOIC-8 Plastic Package Tape and Reel Packaging Available AT-109 V5 Functional Schematic 1,2,3 8 7 6 5 Description M/A-COM's AT-109 is a GaAs MMIC voltage variable absorptive attenuator in a low-cost SOIC-8 lead surface mount plastic package. The AT-109 is more linear than the higher attenuation range AT108. The AT-109 is ideally suited for use where linear attenuation fine tuning and very low power consumption are required. Typical applications include radio, cellular, GPS equipment and automatic gain/level control circuits. The AT-109 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. 1 2 3 4 1. VCC = +5 VDC 0.5 VDC @ 50 A maximum. 2. VC = 0 VDC to +5 VDC @ 50 A maximum. 3. External DC blocking capacitors are required on all RF ports. Pin Configuration Pin No. 1 2 Function Ground Ground RF Port VCC Pin No. 5 6 7 8 Function VC Ground RF Port Ground Ordering Information Part Number AT-109 AT-109TR AT-109SMB 3 4 Package SOIC 8-Lead Plastic Package Forward Tape and Reel Sample Test Board Absolute Maximum Ratings 4,5 Parameter Input Power Supply Voltage VCC Control Voltage VC Operating Temperature Storage Temperature Absolute Maximum +21 dBm -1 V < VCC < +8 V -1 V < VC < VCC + 0.5 V -40C to +85C -65C to +150C Note: Reference Application Note M513 for reel size information. 4. Exceeding any one or combination of these limits may cause permanent damage to this device. 5. M/A-COM does not recommend sustained operation near these survivability limits. 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 35 dB, 0.5-2.0 GHz Electrical Specifications6: TA = 25C, Z0 = 50 Parameter Insertion Loss Attenuation Flatness (Peak to Peak) VSWR Trise, Tfall Ton, Toff Transients AT-109 V5 Test Conditions 0.5 - 1.0 GHz 1.0 - 2.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz -- 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In-band Units dB dB dB dB dB dB Ratio S S mV Min. -- -- 35 30 -- -- -- -- -- -- Typ. 2.5 3.2 -- -- 0.5 1.2 2:1 25 35 12 Max. 2.7 3.5 -- -- 0.8 1.5 -- -- -- -- 6. The RF ports must be blocked outside of the package from ground or any other voltage. 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 35 dB, 0.5-2.0 GHz Typical Performance Curves @ 25C Attenuation vs. Control Voltage, F = 900, 1800 MHz 0 AT-109 V5 IP3 vs. Control Voltage 35 400 MHz 900MHz -10 1800 MHz 900 MHz 30 25 -20 20 -30 15 -40 5 4 3 2 1 0 10 5 4 3 2 1 0 Control Voltage (V) Control Voltage (V) Insertion Loss vs. Frequency 4 Attenuation vs. Temperature, Normalized to 25C, F = 900 MHz 4 3 3 -40C +85C 2 2 1 0 1 -1 0 0.5 1.0 1.5 2.0 -2 5 4 3 2 1 0 Frequency (GHz) Control Voltage (V) Return Loss vs. Control Voltage, F = 900 MHz 0 -5 -10 -15 -20 -25 -30 -35 -40 5 4 3 2 1 0 1 dB Compression vs. Control Voltage, F = 900 MHz 25 20 15 10 5 0 5 4 3 2 1 0 Control Voltage (V) 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. |
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