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| Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2 GHz V 3.00 AT-233 Features n Attenuation: 2 dB Steps to 30 dB n Temperature Stability: 0.18 dB from -55C to +85C n n n n 2 CR-12 Typical Low DC Power Consumption Hermetic Surface Mount Package Integral TTL Driver 50 Ohm Nominal Impedance Description M/A-COM's AT-233 is a GaAs FET 4-Bit digital attenuator with a 2 dB minimum step size and 30 dB total attenuation. This attenuator and integral TTL driver is in a hermetically sealed ceramic 16-lead surface mount package. The AT-233 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 Specifications: TA = 25C1 Parameter Reference Insertion Loss Test Conditions Frequency DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz Any Single Bit DC - 1.0 GHz DC - 2.0 GHz Units dB dB dB Min -- -- -- Typ -- -- -- Max 2.3 2.65 2.8 Attenuation Accuracy3 Any Combination of Bits (0.2 + 3% of attenuation setting in dB) dB (0.2 + 3% of attenuation setting in dB) dB or 0.45 dB, whichever is greater DC - 1.0 GHz (0.20 + 3% of attenuation setting in dB) dB DC - 2.0 GHz (0.25 + 4% of attenuation setting in dB) dB or 0.45 dB, whichever is greater DC - 2.0 GHz Ratio ns ns mV dBm dBm dBm dBm dBm dBm -- -- -- -- -- -- -- -- -- -- -- 10 30 35 +20 +28 +40 +50 +45 +68 1.7:1 -- -- -- -- -- -- -- -- -- VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 4 Input IP2 4 4 10% to 90% 50% Control to 90/10% RF In-Band (peak-peak) Input Power For two tone input power Up to +5 dBm For two-tone input power Up to +5 dBm -- -- -- 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz 1. All specifications apply when operated with bias voltages of +5V or VCC and -5.0V to -8.0V for VEE, and 50 Ohm impedance at all ports unless otherwise specified. 2. Above reference insertion loss. 3. This attenuator is guaranteed monotonic. 4. VEE = -5V for the typical numbers given. Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2 GHz Electrical Specifications: TA = 25C1 Parameter VCC VEE ICC IEE Vctl Input Leakage Current (Low) Input Leakage Current (High) VCC = 4.5 to 5.5 V Vctl = 0 to 0.8V, or VCC -2.1V to VCC VEE = -5.0 to -8.0V Logic 0 (TTL) Logic 1 (TTL) 0 to 0.8V 2.0 to 5.0V Test Conditions Frequency -- -- -- -- -- -- -- -- Units V V mA mA V V A A Min 4.5 -8.0 -- -- 0.0 2.0 -- -- Typ 5.0 -- -- -- -- -- -- -- AT-233 V 3.00 Max 5.5 -5.0 4.0 1.0 0.8 5.0 1.0 1.0 Absolute Maximum Ratings 5 Parameter Max Input Power 0.5 GHz 0.5 - 2.0 GHz Supply Voltages VCC VEE Control Voltage Operating Temperature Storage Temperature Absolute Maximum Functional Schematic (Top View) NC RF2 16 dB +27 dBm +34 dBm +5.5V -8.5V -0.5V to VCC + 0.5V -55C to +125C -65C to +150C +5V -5V 8 dB GND GND GND 4 dB C4 C3 C2 C1 GND PIN 16 PIN 1 2 dB GND GND GND RF1 5. Operation of this device above any one of these parameters may cause permanent damage. Truth Table Control Inputs C4 0 0 0 0 1 1 0 = TTL Low C3 0 0 0 1 0 1 C2 0 0 1 0 0 1 1 = TTL High C1 0 1 0 0 0 1 Attenuation Reference 2 dB 4 dB 8 dB 16 dB 30 dB 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, TTL Driver, DC - 2 GHz Typical Performance Curves AT-233 V 3.00 Ref. Insertion Loss vs. Frequency +85C 5.0 +25C -55C VSWR vs. Frequency 2 dB 2.00 1.80 4 dB 8 dB 16 dB Ref Loss State Insertion Loss (dB) 4.0 3.0 2.0 1.0 0.0 0.0 0.5 1.0 1.5 2.0 VSWR 1.60 1.40 1.20 1.00 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency Full Atten 1.0 16 dB 8 dB 4 dB 2 dB Ordering Information 6 Part Number AT-233 PIN Package CR-12 Deviation from Nominal Attenuation (dB) 0.5 0.0 -0.5 -1.0 -1.5 -2.0 0.0 0.5 1.0 1.5 2.0 6. Contact the factory for standard or custom screening requirements 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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