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| Voltage Variable Absorptive Attenuator 40 dB, 0.5-3.0 GHz Features * * * * * * Single Positive Voltage Control: 0 to +5 Volts 40 dB Attenuation Range at 900 MHz 2 dB Linearity from BSL Low DC Power Consumption SOIC-8 Plastic Package Tape and Reel Packaging Available AT-108 V6 Functional Schematic 1,2,3,4 8 7 6 5 Description M/A-COM's AT-108 is a GaAs MESFET MMIC voltage variable absorptive attenuator in a low cost SOIC-8 surface mount plastic package. The AT-108 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-108 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. Vcc = +5 VDC @ 50 A maximum. 2. Vc = 0 VDC to +5 VDC @ 50 A maximum. 3. External DC blocking capacitors are requirements on all RF ports. 4. 39 pF used for data measurements. 1 2 3 4 Pin Configuration Ordering Information Part Number AT-108 AT-108TR Pin No. Package Bulk Packaging 1000 piece reel 1 2 3 4 Function Ground Ground RF Port VCC Pin No. 5 6 7 8 Function VC Ground RF Port Ground Note: Reference Application Note M513 for reel size information. Absolute Maximum Ratings 5,6 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 5. Exceeding any one or combination of these limits may cause permanent damage to this device. 6. 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 40 dB, 0.5-3.0 GHz Electrical Specifications: TA = 25C, Z0 = 50 Parameter Insertion Loss Attenuation AT-108 V6 Test Conditions 0.5 - 1.0 GHz 1.0 - 3.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz 2.0 - 3.0 GHz 0.5 - 1.0 GHz 1.0 - 2.0 GHz 2.0 - 3.0 GHz 0.5 - 3.0 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 dB dB Ratio S S mV Min. -- -- 40 35 28 -- -- -- -- -- -- -- Typ. 2.5 3.2 -- -- -- 0.5 1.2 1.5 2:1 15 25 12 Max. 2.7 3.5 -- -- -- 0.8 1.5 1.8 -- -- -- -- Flatness (peak-to-peak) VSWR Trise, Tfall Ton, Toff Transients 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 40 dB, 0.5-3.0 GHz Typical Performance Curves @ 25C Attenuation vs. Control Voltage 0 AT-108 V6 Insertion Loss vs. Frequency -1.6 -10 -1.8 -2.0 -20 -2.2 -30 -2.4 900 MHz 1800 MHz 2200 MHz -40 -2.6 -50 5 4 3 2 1 0 -2.8 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Control Voltage (V) Frequency (GHz) Return Loss vs. Control Voltage, F = 900 MHz 0 -5 -10 -15 -20 -25 -30 -35 5 4 3 2 1 0 Return Loss vs. Control Voltage, F = 1800 MHz 0 -5 -10 -15 -20 -25 -30 -35 5 4 3 2 1 0 S11 (dB) S22 (dB) S11 (dB) S22 (dB) Control Voltage (V) Control Voltage (V) Return Loss vs. Control Voltage, F = 2200 MHz 0 -5 Maximum Attenuation vs. Frequency 0 -10 -10 -15 -20 -25 -40 -20 S11 (dB) S22 (dB) -30 -30 -35 5 4 3 2 1 0 -50 0.5 1.0 1.5 2.0 2.5 3.0 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. Frequency (GHz) * 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 40 dB, 0.5-3.0 GHz Typical Performance Curves @ 25C 1 dB Compression vs. Control Voltage, F = 900 MHz 25 AT-108 V6 IP3 vs. Control Voltage 35 30 25 20 400 MHz 900 MHz 20 15 10 15 5 10 0 5 0 5 4 3 2 1 0 5 4 3 2 1 0 -5 Control Voltage (V) Control Voltage (V) Attenuation vs. Temperature Normalized to 25C, F = 900 MHz 3 2 -40C +85C 1 0 -1 -2 5 4 3 2 1 0 Control Voltage (V) 4 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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