Preliminary GaAs IC 3 Bit Digital Attenuator 4 dB LSB Positive Control 0.75–2 GHz AA100-59 Features MSOP-8 ■ Attenuation in 4 dB Steps to 28 dB with High Accuracy 0.0256 (0.65 mm) TYP. PIN 1 INDICATOR ■ Single Positive Control Voltage for Each Bit ■ +3 V to +5 V Operation PIN 1 ■ Small Low Cost MSOP-8 Plastic Package 7.0˚ 0.038 (0.95 mm) TYP. 0.030 (0.75 mm) Description The AA100-59 is a 3 bit, single positive control, 4 dB step GaAs IC FET digital attenuator in a low cost MSOP-8 plastic package. For positive operation external DC blocking capacitors are required on all RF ports. The AA100-59 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. 0.118 (3.00 mm) ± 0.004 (0.1 mm) SQ. 0.012 (0.30 mm) 0.017 (0.43 mm) 0.193 (4.90 mm) REF. + 0.006 (0.15 mm) - 0.002 (0.05 mm) 0.007 (0.18 mm) ± 0.005 (0.12 mm) 0.006 (0.15 mm) 0.002 (0.05 mm) 8.0˚ MAX. 0.028 (0.70 mm) 0.016 (0.40 mm) Electrical Specifications at 25°C (0, +3 V) Parameter1 Typ. Max. Unit Insertion Loss2 0.75–2.0 GHz 1.8 2.1 dB Attenuation Range 0.75–2.0 GHz 28 dB 0.75–1.0 GHz ± (0.2 + 3% of Attenuation Setting in dB) ± (0.3 + 3% of Attenuation Setting in dB) dB Attenuation Frequency Accuracy3 0.75–2.0 GHz VSWR (I/O) Min. 0.75–2.0 GHz 1.5:1 2.0:1 Typ. Max. dB Operating Characteristics at 25°C (0, +3 V) Parameter Switching Characteristics4 Condition Frequency Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru Min. Unit 0.7 1.0 50 µs µs mV Input Power for 1 dB Compression VS = +3 V VS = +5 V 0.75–2.0 GHz 0.75–2.0 GHz +20 +26 dBm dBm Intermodulation Intercept Point (IP3) For Two-tone Input Power +10 dBm VS = +3 V VS = +5 V 0.75–2.0 GHz 0.75–2.0 GHz +32 +45 dBm dBm Control Voltages VLow = 0 to 0.2 V @ 20 µA Max. VHigh = +3 V @ 100 µA Max. to +5 V @ 200 µA Max. VS = VHigh ± 0.2 V 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/°C. 3. Attenuation referenced to insertion loss. 4. 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 3 Bit Digital Attenuator 4 dB LSB Positive Control 0.75–2 GHz AA100-59 Typical Performance Data (0, +3 V) 2.0 6 5 1.5 dB 4 3 1.0 2 0.5 1 0 0 0.5 1.0 1.5 2.0 0.5 2.5 1.5 2.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency VSWR vs. Frequency (All States) 30 Absolute Maximum Ratings 25 Characteristic Value RF Input Power 20 dB 1.0 15 10 5 1 W > 500 MHz 0/8 V 0.5 W @ 50 MHz 0/8 V Supply Voltage +8 V Control Voltage -0.2 V, +8 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C Note: Exceeding these parameters may cause irreversible damage. 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Pin Out VS Attenuation vs. Frequency (All States) 10 kΩ CBL VHigh VHigh Ins. Loss VHigh 0 VHigh 4 dB VHigh VHigh 0 8 dB VHigh 0 0 12 dB 0 VHigh VHigh 16 dB 0 0 VHigh 20 dB 0 VHigh 0 24 dB 0 0 0 28 dB 16 dB V1 GND 5 VHigh GND V3 6 8 dB 4 dB GND 7 4 dB V2 8 16 dB Attenuation J1–J2 4 V3 3 V2 8 dB 2 V1 1 J1 Truth Table J2 DC blocking capacitors (CBL) and biasing resistor must be supplied externally for positive operation. CBL = 100 pF for operation >.75 GHz. VHigh = +3 to +5 V (VS = VHigh ± 0.2 V). 2 CBL Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/99A