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| GaAs 30 dB IC Voltage Variable Dual Control Attenuator DC-4 GHz AT004N3-11 Features s Dual Control Voltages s Low Insertion Loss 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 AT004N3-11 is a GaAs IC FET non-reflective bridged "T" attenuator. This device provides over 30 dB of "matched" attenuation with the input and output VSWR less than 1.5:1 under all attenuation values. The applications for these fast attenuators are AGC circuits and variable level control in high reliability and telecommunication systems. 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 Loss2 Frequency4 DC-1.0 GHz DC-2.0 GHz DC-4.0 GHz DC-1.0 GHz DC-2.0 GHz DC-4.0 GHz DC-2.0 GHz DC-4.0 GHz 30 29 26 Min. Typ. 0.8 1.0 1.2 35 33 30 1.25:1 1.40:1 1.3:1 1.5:1 Max. 1.0 1.2 1.4 Unit dB dB dB dB dB dB Attenuation Range VSWR (I/O) 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 Feedthru3 For All Attenuation Levels VLow = 0 to -0.2 V @ 20 A Max. VHigh = -5 V @ 50 A Max. 0.5-4 GHz 0.05 GHz Frequency Min. Typ. 7 10 20 0 -3 Max. Unit ns ns mV dBm dBm Input Power for 1 dB Compression Control Voltages 1. All measurements made in a 50 system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/C. 3. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. 4. DC = 300 kHz. 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 30 dB IC Voltage Variable Dual Control Attenuator DC-4 GHz AT004N3-11 Typical Performance Data 2.4 50 40 30 20 10 0 DC Insertion Loss (dB) 1.5 1.2 +85C -55C 0.8 0.4 DC 1 2 3 4 Attenuation (dB) 2.0 1 2 3 4 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Attenuation (By State) vs. Frequency Typical Transfer Curve F = 1 GHz, VP1 = -3.5 V F = 50 MHz PIN at 1.0 dB Compression (dBm) 0 20 15 10 5 0 -5 0 5 10 15 20 25 30 V1 V2 Control Voltages (V) -1.0 V1 (Series) -2.0 -3.0 V2 (Shunt) -4.0 -5.0 0 5 10 15 20 25 30 35 Relative Attenuation (dB) Attenuation (dB) Relative Attenuation vs. Control Voltages Attenuation vs. 1.0 dB Compression Point Absolute Maximum Ratings Characteristic RF Input Power (RF In) Control Voltage (VC) Operating Temperature (TOP) Storage Temperature (TST) Thermal Resistance (JC) Value 10 mW > 500 MHz 4 mW @ 50 MHz +0.2 V, -10 V -55C to +125C -65C to +150C 25C/W Truth Table V1 0 -5 V2 -5 0 Attenuation J1-J2 Insertion Loss Full Attenuation Pin Out GND J1 GND V2 GND J2 GND V1 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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