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| GaAs 35 dB IC Voltage Variable Single Control Attenuator 0.4-2.5 GHz AT002S3-11 Features s Single Positive Control Voltage s 35 dB Attenuation Range s 8 Lead Hermetic Surface Mount Package s Capable of Meeting MIL-STD Requirements5 -11 ORIENTATION MARK 0.180 (4.57 mm) SQ. MAX. 0.150 (3.81 mm) 0.017 (0.43 mm) 0.013 (0.33 mm) 0.050 (1.27 mm) TYP. 0.400 (10.16 mm) 0.380 (9.65 mm) Description The AT002S3-11 is a GaAs IC FET absorptive bridged "T" attenuator. This attenuator operates from 0.4-2.5 GHz and provides up to 35 dB of attenuation. The key feature of this attenuator is the requirement of only one "positive" control voltage. Blocking capacitors are required on the RF ports. 0.070 (1.78 mm) 0.040 (1.02 mm) 0.075 (1.91 mm) MAX. 0.006 (0.15 mm) 0.004 (0.10 mm) 0.250 (6.35 mm) 0.200 (5.08 mm) Electrical Specifications at 25C Parameter1 Insertion Loss (V1 = 5 V)2 Frequency 0.4-1.0 GHz 1.0-2.0 GHz 1.0-2.5 GHz 0.4-1.0 GHz 1.0-2.5 GHz 0.4-2.5 GHz 30 33 Min. Typ. 1.5 1.7 2.2 35 38 2.2:1 2.5:1 Max. 1.7 2.0 2.5 Unit dB dB dB dB dB Attenuation Range (V1 = 0) VSWR (I/O)3 Operating Characteristics at 25C Parameter Switching Characteristics Condition Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru4 0-10 dB 11-20 dB 21-30 dB 31-Max. For All Attenuation Levels VLow = 0 to -0.2 V @ 25 A Max. VHigh = 5 V @ 100 A Typ. 5 V @ 100 A Max. 0.4-2.5 GHz Frequency Min. Typ. 0.5 1.0 20 1.0 1.5 3.0 4.0 -3 Max. Unit s s mV dB dB dB dB dBm Attenuation Flatness Input Power for 1 dB Compression Control Voltages Supply Voltages (VS) 0.9 GHz 1. All measurements made in a 50 system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/C. 3. For all attenuation levels. 4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. 5. See Quality/Reliability section. 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 35 dB IC Voltage Variable Single Control Attenuator 0.4-2.5 GHz AT002S3-11 Typical Performance Data 2.4 30 4.5 dB +85C 25 3.5 dB 20 15 1.5 dB 10 5 0.4 V1 = 2.96 0.8 dB 0.5 dB 0.8 1.2 1.6 2.0 V1 = 3.14 2.4 2.8 2.5 dB V1 = 2.80 V1 = 2.24 V1 = 2.43 V1 = 2.62 Insertion Loss (dB) 1.6 -55C 1.2 0.8 0.4 0.4 0.8 1.2 1.6 2.0 2.4 2.8 Frequency (GHz) Attenuation (dB) 2.0 Frequency (GHz) Insertion Loss vs. Frequency Attenuation (By State) vs. Frequency F = 1 GHz 5 4 Absolute Maximum Ratings Characteristic RF Input Power (RF In) Bias Voltage (VB) Value 5 mW > 500 MHz 8V 8V -55C to +125C -65C to +150C 25C/W V1 (V) 3 2 1 0 0 5 10 15 20 25 30 35 Control Voltage (VC) Operating Temperature (TOP) Storage Temperature (TST) Thermal Resistance (JC) Do not allow control voltage V1 to exceed supply voltage (VS). Pin Out GND GND J1 5V Note: Blocking capacitors required at J1 and J2. GND J2 GND V1 Attenuation (dB) Relative Attenuation vs. Control Voltages 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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