AA103-72 ALPHA | Alldatasheet

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Technical content

Features

I Attenuation Cutback of 10 dB I Single Positive 3 V Control I Low Loss I Low Cost SOT -5 Plastic Package SOT-5 AA103-72 0.074 (1.90 mm) REF. 0.118 (3.00 mm) 0.087 (2.20 mm) 0.012 (0.30 mm) 0.000 (0.00 mm) MIN. 0.122 (3.10 mm) 0.106 (2.70 mm) 0.064 (1.63 mm) 0.035 (0.90 mm) 0.020 (0.51 mm) 0.014 (0.35 mm) PIN 1 0.037 (0.95 mm) REF. 0.069 (1.75 mm) 0.052 (1.30 mm) 0.024 (0.61 mm) 0.004 (0.10 mm) 0.0104 (0.26 mm) 0.0035 (0.09 mm) MIN. 0.012 (0.30 mm) TYP.

Description

The AA103-72 is a 1 bit GaAs IC FET digital attenuator in a low cost package. This attenuator has an LSB of 10 dB. The AA103-72 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required.Typical applications include cellular radio, wireless data, and wireless local loop gain level control circuits. Parameter1 Frequency Min. Typ. Max. Unit Insertion Loss2 DC–0.5 GHz 0.3 0.5 dB DC–1.0 GHz 0.3 0.6 dB DC–2.5 GHz 0.4 0.7 dB Attenuation Range 10 dB Attenuation Accuracy3 DC–1.0 GHz ± (0.25 + 3% of Attenuation Setting in dB) dB DC–2.5 GHz ± (0.4 + 5% of Attenuation Setting in dB) dB VSWR (I/O) DC–2.5 GHz 1.2:1 1.4:1 Electrical Specifications at 25°C (0, +3 V) Parameter Condition Frequency Min. Typ. Max. Unit Switching Characteristics4, 5 Rise, Fall (10/90% or 90/10% RF) 150 ns On, Off (50% CTL to 90/10% RF) 300 ns Video Feedthru 70 mV Input Power for 1 dB Compression V S = +3 V 0.5–2.5 GHz +20 dBm VS = +5 V 0.5–2.5 GHz +26 dBm Intermodulation Intercept Point (IP3) For Two-tone Input Power +10 dBm VS = +3 V 0.5–2.5 GHz +41 dBm VS = +5 V 0.5–2.5 GHz +45 dBm Control Voltages V Low = 0 to 0.2 V VHigh = +3 V @ 25 µA Typ. to +5 V @ 50 µA Typ. Operating Characteristics at 25°C (0, +3 V) 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/°C. 3. Maximum attenuation includes insertion loss. 4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. 5. Switching characteristics will vary with value chosen for C BP .

2 Alpha Industries, Inc.[781] 935-5150 • Fax [617] 824-4579• Emailsales@alphaind.com • www.alphaind.com Specifications subject to change without notice. 04/00A GaAs IC 1 Bit Digital Attenuator 10 dB LSB DC–2.5 GHz AA103-72 V1 V2 J1–J2 VHigh 0 Insertion Loss 0V High Attenuation Truth Table VHigh = +3 to +5 V (VS = VHigh ± 0.2 V). 123 C BL C BP C BL VS RF GND 10 kΩ Pin Out DC blocking capacitors (CBL), bypass capacitor (CBP ), and biasing resistor must be supplied externally for positive voltage operation. C BL, CBP = 33 pF for operation @ 900 MHz. Insertion Loss vs. Frequency Frequency (GHz) Insertion Loss (S21, dB) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Frequency (GHz) Attenuation (S21, dB) Attenuation vs. Frequency VSWR vs. Frequency Frequency (GHz) VSWR 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Typical Performance Data (0, +3 V) Characteristic Value RF Input Power 1 W > 500 MHz 0/8 V

0.5 W @ 50 MHz 0/8 V

Control Voltage -0.2 V, +8 V Operating Temperature -40 °C to +85°C Storage Temperature -65 °C to +150°C Absolute Maximum Ratings Note: Exceeding these parameters may cause irreversible damage.