GaAs IC 4 Bit Digital Attenuator 3 dB LSB DC–1 GHz AT001D6-25 Features SOIC-16 ■ Attenuation in 3 dB Steps to 45 dB 0.050 (1.27 mm) BSC PIN 16 ■ Low DC Power Consumption ■ Low Cost SOIC-16 Plastic Package 0.244 (6.20 mm) 0.228 (5.80 mm) PIN 1 INDICATOR Description The AT001D6-25 is an IC FET digital attenuator consisting of four monolithic attenuators with LSB of 3 dB and a total attenuation of 45 dB with all attenuators connected. The attenuator is packaged in the plastic 16 lead surface mount package for low cost commercial cellular radio applications. PIN 1 0.020 (0.51 mm) 0.013 (0.33 mm) 0.068 (1.73 mm) MAX. 0.049 (1.24 mm) 0.016 (0.41 mm) 0.016 MAX. (0.41 mm) x 45˚ CHAMFER 8˚ MAX. 0.394 (10.00 mm) 0.386 (9.80 mm) 0.010 (0.25 mm) 0.004 (0.10 mm) 0.0098 (0.25 mm) 0.0075 (0.19 mm) 0.158 (4.00 mm) 0.150 (3.80 mm) Electrical Specifications at 25°C (0, -5 V) Parameter1 Frequency2 Typ. Max. Unit DC–0.5 GHz DC–1.0 GHz 2.5 3.5 3.2 4.0 dB dB Attenuation Range4 DC–1.0 GHz 10% or ± 0.5 dB Whichever is Greater 12% for 45 dB Attenuation VSWR (I/O) DC–0.5 GHz DC–1.0 GHz 1.4:1 1.6:1 1.6:1 1.8:1 Typ. Max. Insertion Loss3 Min. Operating Characteristics at 25°C (0, -5 V) Parameter Switching Characteristics5 Condition Frequency Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru Input Power for 1 dB Compression Min. Unit 10 20 20 ns ns mV 0.50–1.0 GHz 0.05 GHz +24 +14 dBm dBm 0.50–1.0 GHz 0.05 GHz +43 +32 dBm dBm Intermodulation Intercept Point (IP3) For Two-tone Input Power +13 dBm Control Voltages VLow = 0 to -0.2 V @ 20 µA Max. VHigh = -5 V @ 50 µA to -8 V at 200 µA Max. 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. DC = 300 kHz. 3. Insertion loss changes by 0.003 dB/°C. 4. Attenuation referenced to insertion loss. 5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A 1 GaAs IC 4 Bit Digital Attenuator 3 dB LSB DC–1 GHz AT001D6-25 Typical Performance Data (0, -5 V) 5 15 4 12 +85˚C dB 9 dB 3 -40˚C 2 6 1 3 0 0 DC 0.5 1.0 DC 0.5 1.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 3, 6, 12 dB States 2.5 40 2.2 35 1.9 30 1.6 25 1.3 dB 45 20 1.0 DC 0.5 1.0 DC 0.5 1.0 Frequency (GHz) Frequency (GHz) 24, 36, 45 dB States VSWR vs. Frequency (All States) Absolute Maximum Ratings Pin Out Characteristic Value RF Input Power GND GND J1 GND GND J2 2 W > 500 MHz 0/-8 V 0.5 W @ 50 MHz 0/-8 V Control Voltage 16 15 14 13 12 11 GND GND 10 9 +0.2 V, -8 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C ΘJC 24 dB 6 dB 3 dB 12 dB 25°C/W Note: Exceeding these parameters may cause irreversible damage. 1 2 3 4 5 6 7 8 V8 V7 V6 V5 V4 V3 V2 V1 Truth Table V1 V2 V3 12 dB 2 V4 V5 3 dB V6 V7 6 dB V8 24 dB Attenuation J1–J2 -5 0 -5 0 0 -5 0 -5 -5 0 0 -5 0 -5 0 -5 Reference I.L. 3 dB -5 0 -5 0 -5 0 0 -5 6 dB 0 -5 -5 0 0 -5 0 -5 12 dB -5 0 -5 0 0 -5 -5 0 24 dB 0 -5 0 -5 -5 0 -5 0 45 dB Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A