Digital Attenuator, 28 dB, 3-Bit DC-2.0 GHz Features • • • • • • • AT-230 V4 Functional Schematic 4-dB Attenuation Steps to 28 dB High Accuracy Low DC Power Consumption: 50 µW Low Intermodulation Product: +50 dBm IP3 Temperature Range: -40°C to +85°C SOIC-14 Plastic Package Tape and Reel Packaging Available RF1 GND GND GND 14 13 12 11 16 dB GND GND RF2 9 8 10 4 dB 8 dB Description M/A-COM’s AT-230 is a 3-bit, 4-dB step GaAs MMIC digital attenuator in a low cost SOIC 14lead surface mount plastic package. The AT-230 is ideally suited for use where high accuracy, fast switching, very low power consumption and low intermodulation products are required. Typical applications include radio and cellular equipment, wireless LANs, GPS equipment and other Gain/Level Control circuits. The AT-230 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. Ordering Information Part Number Package AT-230 SOIC 14-Lead Plastic Package AT-230TR Forward Tape & Reel Note: Reference Application Note M513 for reel size information. 1 2 3 4 5 6 7 VC1 VC1 VC2 VC2 VC3 VC3 GND Pin Configuration Pin No. Function Pin No. Function 1 VC1 8 RF2 2 VC1 9 Ground 3 VC2 10 Ground 4 VC2 11 Ground 5 VC3 12 Ground 6 VC3 13 Ground 7 Ground 14 RF1 Absolute Maximum Ratings 1 Parameter Absolute Maximum Input Power: 50 MHz 500-2000 MHz +27 dBm +34 dBm Control Voltage +5V, -8.5V Operating Temperature -40°C to +85°C Storing 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, 28 dB, 3-Bit DC-2.0 GHz AT-230 V4 Electrical Specifications: T A = 25°C, Z0 = 50 Ω Parameter Test Conditions Units Min Typ Max Reference Insertion Loss DC-0.1 GHz DC-0.5 GHz DC-1.0 GHz DC-2.0 GHz dB dB dB dB — — — — 1.2 1.5 1.6 1.8 1.4 1.7 1.8 2.1 Attenuation Accuracy DC-1.0 GHz DC-2.0 GHz ± (0.15 dB +3% of Atten Setting in dB) dB ± (0.30 dB +3% of Atten Setting in dB) dB VSWR Ratio — 1.2:1 — Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 12 — Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS — 18 — Transients In Band mV — 25 — 1 dB Compression (Input Power) 0.05 GHz 0.5-2.0 GHz dBm dBm — — 20 28 — — IP2 0.05 GHz 0.5-2.0 GHz Measured Relative to Input Power (for two-tone input power up to +5 dBm) dBm dBm — — 45 68 — — IP3 0.05 GHz 0.5-2.0 GHz Measured Relative to Input Power (for two-tone input power up to +5 dBm) dBm dBm — — 40 50 — — SOIC-14 Truth Table Control Input VC3 VC3 VC2 VC2 VC1 VC1 Atten (dB) 1 0 1 0 1 0 Reference 0 1 1 0 1 0 4 dB 1 0 0 1 1 0 8 dB 1 0 1 0 0 1 16 dB 0 1 0 1 0 1 28 dB 0 = VIN Low = 0 V to –0.2 V @ 20 µA maximum. 1 = VIN High = -5 V @ 10 µA typical to –8 V @ 200 µA maximum. 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, 28 dB, 3-Bit DC-2.0 GHz AT-230 V4 Typical Performance Curves Insertion Loss Attenuation 3.0 30 25 -40 +85 2.5 25 2.0 20 1.5 15 1.0 10 0.5 5 0.0 0.0 0.5 1.0 1.5 2.0 0 0.0 0.5 Frequency (GHz) 1.0 1.5 2.0 Frequency (GHz) VSWR Attenuation Accuracy 2.0 1.5 AttenDev 4 AttenDev8 AttenDev16 AttenDev28 1.0 1.8 Insertion Loss 4 dB Atten 8 dB Atten 16 dB Atten 0.5 1.6 0.0 1.4 -0.5 1.2 1.0 0.0 -1.0 -1.5 0.5 1.0 1.5 2.0 Frequency (GHz) 0.0 0.5 1.0 1.5 2.0 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. • 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.