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| Digital Attenuator, 30 dB, 4-Bit, DC - 2 GHz V 3.00 AT-232 Features n Attenuation: 2 dB steps to 30 dB n Temperature Stability: 0.18 dB from -55C to +85C n n n n CR-6 Typical Low DC Power Consumption Hermetic Surface Mount Package Fast Switching Speed, 12 ns Typical 50 Ohm Nominal Impedance Description M/A-COM's AT-232 is a GaAs FET 4-bit digital attenuator with a 2 dB minimum step size and 30 dB total attenuation. This attenuator is in a hermetically sealed ceramic 16-lead surface mount package. The AT-232 is ideally suited for use where accuracy, fast switching, very low power consumption and low intermodulation products are required. Typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits. Environmental screening is available. Contact the factory for information. Electrical Specifications1 (From -55C to +85C) Parameter Reference Insertion Loss Test Conditions -- Frequency DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 2.0 GHz -- -- -- 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz Units dB dB dB Min -- -- -- Typ -- -- -- Max 2.0 2.3 2.5 Attenuation Accuracy 2 Any Single Bit Any Combination of Bits (0.15 dB +3% of atten setting in dB) dB (0.2 dB +3% of atten setting in dB) dB Or 0.45 dB, whichever is greater (0.22 dB +3% of atten setting in dB) dB (0.25 dB +4% of atten setting in dB) dB Or 0.45 dB, whichever is greater Ratio ns ns mV dBm dBm dBm dBm dBm dBm -- -- -- -- -- -- -- -- -- -- -- 12 18 25 +20 +28 +40 +50 +45 +68 1.6:1 -- -- -- -- -- -- -- -- -- VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 Input IP2 -- 10% to 90% 50% Control to 90/10% RF In-Band (peak-peak) Input Power Input Power For two-tone Input Power Up to +5 dBm For two-tone Input Power Up to +5 dBm 1. All specifications apply when operated with control votlages of 0.0V to -5.0V. 2. This attenuator is guaranteed monotonic. Digital Attenuator, 30 dB, 4-Bit, DC - 2 GHz AT-232 V 3.00 Electrical Specifications (From -55C to +85C) Parameter Input Leakage Current (Low) Input Leakage Current (High) Test Conditions -0.2 to 0V -8.0 to -5.0V Frequency -- -- Units A A Min -- -- Typ -- -- Max 20 200 Absolute Maximum Ratings 3 Parameter Max Input Power 0.05 GHz 0.5 - 2.0 GHz Control Voltage Operating Temperature Storage Temperature Absolute Maximum Truth Table Control Inputs /VC4 VC4 0V -5V 0V 0V 0V -5V /VC3 VC3 /VC2 -5V -5V 0V -5V -5V 0V 0V 0V -5V 0V 0V -5V -5V -5V -5V 0V -5V 0V VC2 0V 0V 0V -5V 0V -5V /VC1 VC1 -5V -5V -5V -5V 0V 0V 0V 0V 0V 0V -5V -5V Atten. (dB) Ref. 2 dB 4 dB 8 dB 16 dB 30 dB +27 dBm +34 dBm +0.5V, -8.5V -55C to +125C -5V 0V -5V -65C to +150C -5V -5V 0V 3. Operation of this device above any one of these parameters may cause permanent damage. Functional Schematic (Top View) VC1 16 dB RF1 GND GND 8 dB /VC1 VC2 /VC2 VC3 /VC3 VC4 /VC4 2 dB 4 dB GND GND GND GND Orientation Mark RF2 Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 2 Digital Attenuator, 30 dB, 4-Bit, DC - 2 GHz Typical Performance Curves VSWR vs. Frequency 2 dB 1.6 1.5 3 AT-232 V 3.00 Ref. Insertion Loss vs. Frequency -55C 4 +25C +85C 4 dB 8 dB 16 dB 30 dB Insertion Loss Insertion Loss (dB) 1.4 VSWR 2 1.3 1.2 1 1.1 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency 2 dB 16 dB 4 dB 8 dB 30 dB Ordering Information Part Number AT-232 PIN Package CR-6 Deviation from Nominal Atten (dB) 3.00 2.50 2.00 1.50 1.00 0.50 0.00 -0.50 -1.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 3 |
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