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| Digital Attenuator, 1 Bit, 10 dB Step DC - 2.0 GHz Features * Single 10 dB Step * Low Loss: 0.3 dB @ 900 MHz * Low Cost SOT-25 Package AT-266 V4 Functional Block Diagram Description M/A-COM's AT-266 is a 1 bit, 10 dB step GaAs MMIC digital attenuator in a low cost SOT-25 surface mount plastic package. The AT-266 is ideally suited for use where high accuracy, very low power consumption and low intermodulation products are required. Typical applications include radio, wireless LANs, GPS equipment and other gain/level control circuits. The AT-266 is fabricated using a mature GaAs MMIC process featuring full chip passivation for increased performance and reliability. Pin Configuration Pin No. Function RF1 GND RF2 V1 V2 Description RF In/Out RF Ground RF In/Out Control Voltage Control Voltage Ordering Information Part Number AT-266 AT-266TR 1 2 Package Bulk Packaging 1000 piece reel 3 4 5 Note: Reference Application Note M513 for reel size information. Truth Table 3,4,5 V1 V2 1 0 Attenuation State 10 dB Insertion Loss Absolute Maximum Ratings 1,2 Parameter Input Power 50 MHz 500 - 2000 MHz Control Voltage Operating Temperature Storing Temperature 0 1 Absolute Maximum +27 dBm +34 dBm -8.5 V < Vc < +8 V -40C to +85C -65C to +150C 3. For positive voltage control, external DC blocking capacitors are required on all RF ports (pins 1, 2 and 3). 4. Differential voltage, V(state 1) - V(state 0), must be +2.8 V minimum and less than 8 V. 5. 0 = -8 V to 0.2 V, 1 = -0.2 V to 8 V 1. Exceeding any one or combination of these limits may cause permanent damage to this device. 2. 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. Digital Attenuator, 1 Bit, 10 dB Step DC - 2.0 GHz Electrical Specifications: TA = 25C, VC = 0 V / -3 V, Z0 = 50 Parameter Insertion Loss Attenuation VSWR IP3 P1dB Trise, Tfall Ton, Toff Transients Control Current AT-266 V4 Test Conditions 0 - 1 GHz 1 - 2 GHz DC - 1 GHz 1 - 2 GHz 0 - 2 GHz 2 Tone @ 0 dBm, 5 MHz spacing 1 GHz 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Vc = 3 V Units dB dB dB dB Ratio dBm dBm nS nS mV A Min. -- -- 9.6 9.5 -- 42 23 -- -- -- -- Typ. 0.3 0.5 10 10 1.4:1 50 28 5 10 6 25 Max. 0.45 0.7 10.4 10.5 1.5:1 -- -- 20 25 10 -- SOT-25 Plastic Package Handling Procedures Please observe the following precautions to avoid damage: Static Sensitivity Gallium Arsenide Integrated Circuits are sensitive to electrostatic discharge (ESD) and can be damaged by static electricity. Proper ESD control techniques should be used when handling these devices. 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, 10 dB Step DC - 2.0 GHz Typical Performance Curves (39 pF capacitors used for positive voltage control) Insertion Loss (Positive Control) 1.0 +25C -40C +85C AT-266 V4 Insertion Loss (Negative Control) 1.0 0.8 0.8 +25C -40C +85C 0.6 0.6 0.4 0.4 0.2 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) Relative Attenuation (Positive Control) 11.0 +25C -40C +85C Relative Attenuation (Negative Control) 11.0 +25C -40C +85C 10.5 10.5 10.0 10.0 9.5 9.5 9.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 9.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) Return Loss (Reference State) 40 Positive Control Negative Control Return Loss (10 dB State) 40 Positive Control Negative Control 30 30 20 20 10 10 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 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. 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. |
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