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| Digital Attenuator, 4-Bit, Single Control 30 dB, 0.5-2.0 GHz Features * * * * Positive Single Control 2-dB Attenuation Steps to 30 dB Low DC Power Consumption TSSOP-16 Plastic Package AT-264 V6 Functional Schematic 2,3 Vs 16 15 14 13 12 1 11 10 9 Description M/A-COM's AT-264 is a 4-bit, 2-dB step GaAs MMIC digital attenuator in a low cost TSSOP-16 surface mount plastic package. The AT-264 is ideally suited for use where high accuracy, very low power consumption and low intermodulation products are required. Typical applications include radio, cellular, wireless LANs, GPS equipment and other gain/level control circuits. The AT-264 is fabricated using a mature 1 micron GaAs MESFET process. The process features full chip passivation for increased performance and reliability. 16 8 4 2 1 2 3 4 5 6 7 8 Ordering Information Part Number AT-264 AT-264TR* Package TSSOP 16-Lead Plastic Package Tape and Reel 2. Blocking caps are required on all RF ports (39 pF used for data measurements). 3. Vs = +5 0.2 VDC must be applied at RF1 or RF2 using a 10 Kohm or greater pull-up resistor. Pin Configuration * Reference Application Note M513 for reel size information. Pin No. 1 Function Ground Ground VC1 VC2 VC3 VC4 Ground Ground Pin No. 9 10 11 12 13 14 15 16 Function RF2 Ground Ground Ground Ground Ground Ground RF1 Absolute Maximum Ratings Parameter Input Power 50 MHz 500 - 2000 MHz Control Voltage Operating Temperature Storage Temperature 1 2 3 Absolute Maximum +27 dBm +34 dBm -0.5 V < VC < 8.5 V -40C to +85C -65C to +150C 4 5 6 7 8 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. Digital Attenuator, 4-Bit, Single Control 30 dB, 0.5-2.0 GHz Electrical Specifications4: TA = 25C, Z0 = 50 , VS = 5 V Parameter Reference Insertion Loss Attenuation Accuracy VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression IP2 AT-264 V6 Test Conditions 0.5 - 1.0 GHz 0.5 - 2.0 GHz 0.5 - 1.0 GHz 0.5 - 2.0 GHz 1.0 - 1.5 GHz 0.5 - 2.0 GHz 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Input Power 0.5 GHz 0.9 GHz 0.5 GHz 0.5 - 2.0 GHz Measured Relative to Input (for two-tone Input Power up to +5 dBm) 0.5 GHz 0.5 - 2.0 GHz Measured Relative to Input (for two-tone Input Power up to +5 dBm) Units dB dB Min -- -- Typ 2.0 2.2 Max 2.4 2.6 (0.15 dB + 5% of attenuation setting in dB) dB (0.3 dB + 5% of attenuation setting in dB) dB Ratio Ratio nS nS mV dBm dBm dBm dBm dBm dBm -- -- -- -- -- -- -- -- -- -- -- 1.5:1 1.9:1 500 500 75 25 25 65 71 43 47 -- -- -- -- -- -- -- -- -- -- -- IP3 4. External DC blocking capacitors are required on all RF ports. Loss varies at 0.003 dB/C. Truth Table VC1 VC2 VC3 VC4 1 1 1 1 0 0 1 1 1 0 1 0 1 1 0 1 1 0 1 0 1 1 1 0 Attenuation (dB) Reference Insertion Loss 2 4 8 16 30 Logic 0 = 0 0.2 V. Logic 1 = +5 V @ 30 A maximum current total. 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, 4-Bit, Single Control 30 dB, 0.5-2.0 GHz Typical Performance Curves Insertion Loss +25C 3.5 +85C -40C 2.0 1.8 AT-264 V6 VSWR IL 2dB 16dB 30dB Insertion Loss (dB) 3.0 2.5 2.0 1.5 0.5 1.0 1.5 2.0 2.5 3.0 VSWR 1.6 1.4 1.2 1.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) Attenuation 32 28 24 20 16 12 8 4 0 0.5 1.0 1.5 2.0 2.5 3.0 Attenuation Accuracy 2dB 1.5 4dB 8dB 16dB 30dB Attenuation (dB) Deviation From Nominal Attenuation (dB) 1.0 0.5 0.0 -0.5 -1.0 -1.5 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) TSSOP-16 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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