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| Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 2 GHz V 3.00 AT-263 Features n Attenuation: 1 dB steps to 31 dB n Temperature Stability: 0.18 dB from -55C to +85C n n n n CR-12 Typical Low DC Power Consumption Hermetic Surface Mount Package Integral TTL Driver 50 Ohm Nominal Impedance Description M/A-COM's AT-263 is a GaAs FET 5-bit digital attenuator with a 1 dB minimum step size and 31 dB total attenuation. This attenuator and integral TTL driver is in a hermetically sealed ceramic 16-lead surface mount package. The AT-263 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 - 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 2.4 2.8 3.0 Attenuation Accuracy 2 Any Single Bit Any Combination of Bits -- 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 -- -- (0.25 +3% of atten setting in dB) dB (0.25 +3% of atten setting in dB) dB or 0.4 dB, whichever is greater Ratio ns ns mV dBm dBm dBm dBm dBm dBm V V -- -- -- -- -- -- -- -- -- -- 4.5 -8.0 -- 9 40 30 +20 +28 +40 +48 +45 +68 5.0 -- 1.6:1 -- -- -- -- -- -- -- -- -- 5.5 -5.0 VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 Input IP2 Vcc Vee 1. All specifications apply when operated with bias voltages of +5V for Vcc and -5.0V for Vee. 2. This attenuator is guaranteed monotonic. Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 2 GHz AT-263 V 3.00 Electrical Specifications (From -55C to +85C) Parameter Icc Iee Vctl Vctl Input Leakage Current (Low) Input Leakage Current (High) Test Conditions Vcc = 4.5 to 5.5V 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 Frequency -- -- -- -- -- -- Units mA mA V V A A Min -- -- 0.0 2.0 -- -- Typ -- -- -- -- -- -- Max 5.0 1.0 0.8 5.0 1.0 1.0 Absolute Maximum Ratings 3 Parameter Max Input Power 0.5 GHz 0.5 - 2.0 GHz Supply Voltages Vcc Vee Control Voltage 4 Truth Table Control Inputs C5 C4 0 0 0 0 1 0 1 C3 0 0 0 1 0 0 1 C2 0 0 1 0 0 0 1 C1 0 1 0 0 0 0 1 Attenuation Reference 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB Absolute Maximum +27 dBm +34 dBm +5.5V -8.5V -0.5V to Vcc +0.5V -55C to +125C -65C to +150C 0 0 0 0 0 1 1 Operating Temperature Storage Temperature 3. Operation of this device above any one of these parameters may cause permanent damage. 4. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 0 = TTL Low 1 = TTL High Functional Schematic (Top View) C5 16 dB RF2 GND 8 dB +5V -5V C4 C3 C2 C1 1 dB 2 dB GND GND GND GND GND Orientation Mark RF1 PIN 1 4 dB PIN 16 GND 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, 31 dB, 5-Bit, TTL Driver, DC - 2 GHz Typical Performance Curves AT-263 V 3.00 Ref. Insertion Loss vs. Frequency +85C 5 4 +25C -55C Attenuation Accuracy vs. Frequency Deviation from Nominal Atten (dB) 1,2,4,8,16 dB 0.5 Full Attenuation 0 Loss (dB) 3 2 1 0 0.0 0.5 1.0 1.5 2.0 -0.5 -1 -1.5 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency 4 dB State 2.00 1.80 1 dB State Ordering Information Part Number AT-263 PIN Package CR-12 VSWR 1.60 1.40 1.20 1.00 0.00 0.50 1.00 1.50 2.00 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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