GaAs IC 3 Bit Digital Attenuator 4 dB LSB DC–2 GHz AA230-24 (Previously AD230-24)* Features ■ Attenuation in 4 dB steps to 28 dB with High Accuracy ■ Low Cost SOIC-14 Plastic Package ■ Low DC Power Consumption SOIC-14 PIN 14 0.244 (6.20 mm) 0.228 (5.80 mm) 0.158 (4.01 mm) 0.150 (3.81 mm) PIN 1 INDICATOR Description 0.020 (0.51 mm) 0.013 (0.33 mm) PIN 1 The AD230-24 is an IC FET Digital Attenuator consisting of three monolithic attenuators with LSB of 4 dB and a total attenuation of 28 dB with all attenuators connected. Attenuators are switched with -5 and 0 V. The AD230-24 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include cellular radio, wireless data, wireless local loop and other gain level control circuits. 0.050 (1.27 mm) BSC 0.050 (1.27 mm) 0.016 (0.40 mm) 0.068 (1.73 mm) MAX. 0.016 MAX. (0.41 mm) x 45˚ CHAMFER 0.049 (1.24 mm) 0.016 (0.41 mm) 8˚ MAX. 0.344 (8.75 mm) 0.337 (8.55 mm) 0.010 (0.25 mm) 0.0098 (0.25 mm) 0.004 (0.10 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 Insertion Loss3 DC–0.1 DC–0.5 DC–1.0 DC–2.0 Min. GHz GHz GHz GHz Attenuation Range Attenuation Accuracy4 DC–1.0 GHz DC–2.0 GHz VSWR (I/O) Typ. Max. Unit 1.1 1.2 1.3 1.9 1.4 1.5 1.7 2.3 dB dB dB dB 28 dB ± (0.2 + 3% of Attenuation Setting in dB) ± (0.4 + 5% of Attenuation Setting in dB) dB DC–2.0 GHz 1.3:1 1.5:1 Typ. Max. dB 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 Unit 15 25 25 ns ns mV 0.50–2.0 GHz 0.05 GHz +28 +22 dBm dBm 0.50–2.0 GHz 0.05 GHz +48 +38 dBm dBm Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm Control Voltages VLow = 0 to -0.2 V @ 20 µA Max. VHigh = -5 V @ 50 µA Typ. to -8 V @ 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. Min. 4. Attenuation referenced to insertion loss. 5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. *Due to conflict with another company’s product numbering system, Alpha’s attenuator products starting with the letters “AD” are being changed to “AA”. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 10/99A 1 GaAs IC 3 Bit Digital Attenuator 4 dB LSB DC–2 GHz AA230-24 Typical Performance Data (0, -5 V) 3.0 2.0 2.5 1.5 dB 2.0 1.5 1.0 1.0 0.5 0.5 0 0 0 0.5 1.0 1.5 2.0 0.5 1.0 1.5 2.0 Frequency (GHz) Insertion Loss vs. Frequency VSWR vs. Frequency (All States) Absolute Maximum Ratings 35 30 dB 0 Frequency (GHz) Characteristic Value 25 RF Input Power 20 Control Voltage 15 Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 10 2 W > 500 MHz 0/-8 V 0.5 W @ 50 MHz 0/-8 V +0.2 V, -8 V Note: Exceeding these parameters may cause irreversible damage. 5 0 0 0.5 1.0 1.5 2.0 Pin Out Frequency (GHz) Attenuation vs. Frequency (All States) Truth Table V1 V2 2 J2 9 8 7 13 16 dB V3 4 dB J1 GND GND GND GND GND 14 V4 8 dB V5 V6 Attenuation J1–J2 16 dB -5 0 -5 0 -5 -5 0 -5 0 -5 0 0 -5 16 dB 0 -5 0 -5 0 -5 28 dB 12 11 8 dB 10 4 dB 0 -5 0 Reference I.L. -5 0 -5 0 4 dB 1 2 3 4 5 6 0 -5 -5 0 8 dB V6 V5 V4 V3 V2 V1 GND Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 10/99A