AT-220 11/15/96 1:49 PM Page 1 (Black plate) Digital Attenuator, 30 dB, 4-Bit DC - 2 GHz AT-220 V3.00 SO-16 Features ● ● ● ● ● ● ● Attenuation 2-dB Steps to 30 dB High Accuracy +/-3% Temperature Stability +/-0.15 dB from -40°C to +85°C Low Intermodulation Product: +50 dBm IP3 Low DC Power Consumption: 50 mW Low Cost SOIC 16 Plastic Package Tape and Reel Packaging Available1 Pin #16 .1497-.1574 .2284-.2440 (3.80-4.00) (5.80-6.20) .010(0.25) M B M -BPin #1 Orientation Mark 0.3859-0.3937 (9.80-10.00) -A- .0532-.0688 (1.35-1.75) -C- .0099-.0196 x 45° Chamfer (0.25-0.50) 0°-8° .004 (0.10) Description M/A-COM’s AT-220 is a 4-bit, 2-dB step GaAs MMIC digital attenuator in a low cost SOIC 16-lead surface mount plastic package. The AT-220 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-220 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability. .0040-.0098 0.050(1.27) BSC. (0.10-0.25) .013-.020 TYP (0.33-0.51) .010(0.25) M C A M B S .016-.050 (0.40-1.27) .0075-.0098 (0.19-0.25) 16-Lead SOP outline dimensions Narrow body .150 (All dimensions per JEDEC No. MS-012-AC, Issue C) Dimensions in ( ) are in mm. Unless Otherwise Noted: .xxx = ± 0.010 (.xx = ± 0.25) .xx = ± 0.02 (.x = ±0.5) Ordering Information Part Number AT-220 PIN AT-220TR AT-220RTR Package SOIC 16-Lead Plastic Package Forward Tape & Reel Reverse Tape & Reel Electrical Specifications, TA = 25°C Test Conditions2 Parameter Reference Insertion Loss DC – 0.1 GHz DC – 0.1 GHz DC – 1.0 GHz DC – 2.0 GHz DC – 1.0 GHz DC – 2.0 GHz Attenuation Accuracy3 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 VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression IP2 IP3 1.2:1 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) nS nS mV dBm dBm dBm dBm 12 18 25 20 28 45 68 dBm dBm 40 50 1. Refer to “Tape and Reel Packaging” Section, or contact factory. 2. All measurements at 1 GHz in a 50Ω system, unless otherwise specified. 3. Attenuation accuracy specifications apply with negative bias control and low inductance grounding. Specifications Subject to Change Without Notice. M/A-COM, Inc. North America: 1 Tel. (800) 366-2266 Fax (800) 618-8883 ■ Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769 ■ Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020 AT-220 11/15/96 1:49 PM Page 2 (Black plate) Digital Attenuator, 30 dB, 4-Bit AT-220 V3.00 Functional Schematic Absolute Maximum Ratings1 Parameter Max. Input Power 50 MHz 500-2000 MHz Control Voltage Operating Temperature Storage Temperature RF1 GNDGND GND GND GND GND RF2 Absolute Maximum 16 +27 dBm +34 dBm +5V, -8.5V -40°C to +85°C -65°C to +150°C 15 8 dB 14 13 12 4 dB 11 10 2 dB 9 1 dB 1. Operation of this device above any one of these parameters may cause permanent damage. 21 1 43 32 5 6 80 7 VC1 VC1 VC2 VC2 VC3 VC3 VC4 VC4 Truth Table Pin Configuration Pin Description Pin No. Description Control Inputs 1 VC1 9 RF2 VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation (dB) 2 VC1 10 GND 3 VC2 11 GND 1 0 1 0 1 0 1 0 Reference 4 VC2 12 GND 0 1 1 0 1 0 1 0 2 dB 5 VC3 13 GND 1 0 0 1 1 0 1 0 4 dB 6 VC3 14 GND 1 0 1 0 0 1 1 0 8 dB 1 0 1 0 1 0 0 1 16 dB 0 1 0 1 0 1 0 1 30 dB 7 VC4 15 GND 8 VC4 16 RF1 Typical Performance INSERTION LOSS vs FREQUENCY 3.0 LOSS (dB) + 85˚C 2.0 1.0 + 25˚C - 40˚C 0 0 0.5 1.0 1.5 2.0 DEVIATION FROM NOMINAL ATTENUATION (dB) "0" = Vin Low, Vin Low = 0V, "1" = Vin High, Vin High = -5V "0" = 0 to -0.2V @ 20mA Max "1" = -5V @ 10 mA typ to -8V @ 200 mA Max FREQUENCY (GHz) ATTENUATION ACCURACY vs FREQUENCY 1.5 1 2 dB ATTEN 0 -1.5 0.0 LOSS (dB) VSWR 16 dB ATTEN 2 dB ATTEN 1.4 INSERTION LOSS 1.2 8 dB ATTEN 0 0.5 1.0 0.5 1.5 2.0 1.5 2.0 ATTENUATION vs FREQUENCY 1.8 1.0 30 dB ATTEN -1 VSWR vs FREQUENCY 4 dB ATTEN 4 dB ATTEN -0.5 FREQUENCY (GHz) 2.0 1.6 16 dB ATTEN 8 dB ATTEN 0.5 1.0 1.5 2.0 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32 0.0 0.5 1.0 FREQUENCY (GHz) FREQUENCY (GHz) Specifications Subject to Change Without Notice. M/A-COM, Inc. 2 North America: Tel. (800) 366-2266 Fax (800) 618-8883 ■ Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769 ■ Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020 11/15/96 1:49 PM Page 3 (Black plate) Digital Attenuator, 30 dB, 4-Bit AT-220 V3.00 Swept Data Characterized in 75 Ohms S11 vs FREQUENCY ATTENUATION vs FREQUENCY 0 32 ATTENUATION (dB) 4 dB -5 0 dB S11 (dB) AT-220 -10 -15 -20 2 dB -25 8 dB 16 dB 0.2 0.4 0.6 0.8 24 20 16 12 8 4 30 dB -30 0 28 1 0 0 FREQUENCY (GHz) 0.2 0.4 0.6 0.8 1 FREQUENCY (GHz) Specifications Subject to Change Without Notice. M/A-COM, Inc. North America: 3 Tel. (800) 366-2266 Fax (800) 618-8883 ■ Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769 ■ Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020 AT-220 11/15/96 1:49 PM Page 3 (Cyan plate) AT-220 11/15/96 1:49 PM Page 3 (Magenta plate) AT-220 11/15/96 1:49 PM Page 3 (Yellow plate)