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