Digital Attenuator, 4-Bit, Single Control 30 dB, 0.5-2.0 GHz Features • • • • AT-264 V6 Functional Schematic 2,3 Positive Single Control 2-dB Attenuation Steps to 30 dB Low DC Power Consumption TSSOP-16 Plastic Package 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. 16 The AT-264 is fabricated using a mature 1 micron GaAs MESFET process. The process features full chip passivation for increased performance and reliability. 1 8 2 3 4 4 2 5 6 7 8 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. Ordering Information Part Number Package AT-264 TSSOP 16-Lead Plastic Package AT-264TR* Tape and Reel Pin Configuration * Reference Application Note M513 for reel size information. Absolute Maximum Ratings 1 Pin No. Function Pin No. Function 1 Ground 9 RF2 2 Ground 10 Ground 3 VC1 11 Ground 4 VC2 12 Ground 5 VC3 13 Ground Parameter Absolute Maximum Input Power 50 MHz 500 - 2000 MHz +27 dBm +34 dBm 6 VC4 14 Ground Control Voltage -0.5 V < VC < 8.5 V 7 Ground 15 Ground Operating Temperature -40°C to +85°C 8 Ground 16 RF1 Storage Temperature -65°C to +150°C 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 AT-264 V6 Electrical Specifications4: TA = 25°C, Z0 = 50 Ω, VS = 5 V Parameter Test Conditions Units Min Typ Max Reference Insertion Loss 0.5 - 1.0 GHz 0.5 - 2.0 GHz dB dB — — 2.0 2.2 2.4 2.6 Attenuation Accuracy 0.5 - 1.0 GHz 0.5 - 2.0 GHz VSWR 1.0 - 1.5 GHz 0.5 - 2.0 GHz Ratio Ratio — — 1.5:1 1.9:1 — — Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 500 — Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS — 500 — Transients In Band mV — 75 — 1 dB Compression Input Power 0.5 GHz 0.9 GHz dBm dBm — — 25 25 — — IP2 0.5 GHz 0.5 - 2.0 GHz Measured Relative to Input (for two-tone Input Power up to +5 dBm) dBm dBm — — 65 71 — — IP3 0.5 GHz 0.5 - 2.0 GHz Measured Relative to Input (for two-tone Input Power up to +5 dBm) dBm dBm — — 43 47 — — ± (0.15 dB + 5% of attenuation setting in dB) dB ± (0.3 dB + 5% of attenuation setting in dB) dB 4. External DC blocking capacitors are required on all RF ports. Loss varies at 0.003 dB/°C. Truth Table VC1 VC2 VC3 VC4 Attenuation (dB) 1 1 1 1 Reference Insertion Loss 1 1 1 0 2 1 1 0 1 4 1 0 1 1 8 0 1 1 1 16 0 0 0 0 30 Logic 0 = 0 ± 0.2 V. Logic 1 = +5 V @ 30 µA 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 AT-264 V6 Typical Performance Curves VSWR Insertion Loss +85C -40C IL 2.0 3.0 1.8 VSWR Insertion Loss (dB) +25C 3.5 2.5 2.0 2dB 30dB 1.6 1.4 1.2 1.5 1.0 0.5 1.0 1.5 2.0 2.5 3.0 0.5 1.0 1.5 2.5 3.0 Attenuation Accuracy Attenuation 2dB 32 28 24 20 16 12 8 4 0 0.5 2.0 Frequency (GHz) Frequency (GHz) 4dB 8dB 16dB 30dB 1.5 Deviation From Nominal Attenuation (dB) Attenuation (dB) 16dB 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) 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) 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.