Digital Attenuator, 28 dB, 3-Bit DC - 2 GHz SO-14 Features ● ● ● ● ● ● ● AT-230 Attenuation 4-dB Steps to 28 dB High Accuracy +/- 3% Low DC Power Consumption: 50 µW Low Intermodulation Product: +50 dBm IP3 Temperature Range: -40˚C to +85˚C Low Cost SOIC14 Plastic Package Tape and Reel Packaging Available1 Pin #14 .1497-.1574 .2284-.2440 (3.80-4.00) (5.80-6.20) .010(0.25) M B M -B- Orientation Mark .0532-.0688 (1.35-1.75) Pin #1 .3357-.3444 (8.55-8.75) -A- -C- Description M/A-COM’s AT-230 is a 3-bit, 4-dB step GaAs MMIC digital attenuator in a low cost SOIC 14-lead 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. Electrical Specifications1, TA = +25°C Parameter Reference Insertion Loss 0.050(1.27) BSC. .013-.020 TYP (0.33-0.51) Part Number AT-230 PIN AT-230TR AT-230RTR IP3 Package SOIC 14-Lead Plastic Forward Tape & Reel Reverse Tape & Reel * If specific reel size is required, consult factory for part number assignment. 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Input Power 0.05 GHz Input Power 0.5 – 2.0 GHz Measured Relative 0.05 GHz to Input Power 0.5 – 2.0 GHz (for two-tone input power up to +5 dBm) Measured Relative 0.05 GHz to Input Power 0.5 – 2.0 GHz (for two-tone input power up to +5 dBm) IP2 .0075-.0098 (0.19-0.25) Ordering Information DC – 0.1 GHz DC – 0.5 GHz DC – 1.0 GHz DC – 2.0 GHz DC – 1.0 GHz DC – 2.0 GHz VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression .016-.050 (0.40-1.27) .010(0.25) M C A M B S 14-Lead SOP outline dimensions Narrow body .150 (All dimensions per JEDEC No. MS-012-AB, Issue C) Dimensions in ( ) are in mm. Test Conditions Attenuation Accuracy .0040-.0098 (0.10-0.25) .0099-.0196 x 45° Chamfer (0.25-0.50) 0°-8° Unit Min. Typ. Max dB 1.2 1.4 dB 1.5 1.7 dB 1.6 1.8 dB 1.8 2.1 ± (0.15 dB +3% of Attenuation Setting in dB) dB ± (0.30 dB +3% of Attenuation Setting in dB) dB 1.2:1 nS 12 nS 18 mV 25 dBm 20 dBm 28 dBm 45 dBm 68 dBm dBm 40 50 1. All measurements at 1 GHz in a 50Ω system, unless otherwise specified. Specifications Subject to Change Without Notice. M/A-COM, Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA V2.0 ■ Telephone: 800-366-2266 Digital Attenuator, 28 dB, 3-Bit AT-230 Functional Schematic Absolute Maximum Ratings1 Parameter Absolute Maximum Max. Input Power 50 MHz 500-2000 MHz Control Voltage RF1 14 +27 dBm +34 dBm +5 V, -8.5 V GND 13 GND 12 16 dB Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C GND 11 GND 10 8 dB GND 9 RF2 8 4dB 1. Operation of this device above any one of these parameters may cause permanent damage 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 1 2 3 4 VC1 VC1 VC2 VC2 5 VC3 6 7 VC3 GND 0 = VIN Low = 0 V to -0.2 V @ 20 *A maximum 1 = VIN High = -5 V @ 10 *A typ. to -8 V @ 200 *A maximum Typical Performance INSERTION LOSS vs FREQUENCY ATTENUATION ACCURACY vs FREQUENCY LOSS (dB) +85°C NOMINAL ATTENUATION (dB) 3.0 +25°C 2.0 1.0 -40°C 0 1.5 0.5 0 -0.5 8 dB ATTEN 28 dB ATTEN -1 -1.5 0 0.5 1.0 FREQUENCY (GHz) 1.5 2.0 0 1.8 LOSS (dB) 16 dB ATTEN 4 dB ATTEN 1.6 INSERTION LOSS 1.4 8 dB ATTEN 1.2 1 0 0.5 0.5 1.5 2.0 1.5 1.0 FREQUENCY (GHz) 2.0 1.0 FREQUENCY (GHz) ATTENUATION vs FREQUENCY VSWR vs FREQUENCY 2.0 VSWR 4 dB ATTEN 16 dB ATTEN 1 1.0 FREQUENCY (GHz) 1.5 2.0 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32 0 0.5 Specifications Subject to Change Without Notice. M/A-COM, Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA V2.0 ■ Telephone: 800-366-2266