AT-266_1

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 -40°C to +85°C -65°C to +150°C 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 = 25°C, VC = 0 V / -3 V, Z0 = 50 Ω 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 µA 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 +25°C -40°C +85°C AT-266 V4 Insertion Loss (Negative Control) 1.0 0.8 0.8 +25°C -40°C +85°C 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 +25°C -40°C +85°C Relative Attenuation (Negative Control) 11.0 +25°C -40°C +85°C 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.