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Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz V 1.00 AT90-0233 Features n Attenuation: 2 dB Steps to 30 dB n Low DC Power Consumption n Small Footprint, JEDEC Package n Integral TTL Driver n 50 Ohm Impedance n Test Boards Available n Tape and Reel Packaging Available CSP-1 Description M/A-COM's AT90-0233 is a GaAs FET 4-Bit digital attenuator with integral driver. Step size is 2 dB providing a 30 dB attenuation range. This device is in an FQFP-N plastic surface mount package. The AT90-0233 is suited for use where accuracy, fast speed, very low power consumption and low costs are required. Electrical Specifications TA = +25C Parameter Insertion Loss Attenuation Accuracy VSWR Switching Speed 1 dB Compression Input IP3 +Vcc -Vee Logic "0" Logic "1" Icc -Iee Test Conditions -- Individual Bits or Combination of Bits Full Range 50% Cntl to 90%/10% RF 10% to 90% or 90% to 10% -- -- Two-tone inputs up to +5 dBm -- -- Sink Current is 20 A max. Source Current is 20 A max. Vcc min to max, Logic "0" or "1" -Vee min to max, Logic "0" or "1" Frequency DC - 2.5 GHz DC - 2.5 GHz DC - 2.5 GHz -- -- 50 MHz 0.5 - 2.5 GHz 50 MHz 0.5 - 2.5 GHz -- -- -- -- -- -- Units dB dB Ratio nS nS dBm dBm dB dB V V V V mA mA Min -- -- -- -- -- -- -- -- -- 4.75 -8.0 0.0 2.0 -- -- Typical 2.7 -- 1.5:1 75 20 +21 +29 +35 +48 5.0 -5.0 -- -- 0.2 -0.2 Max 3.0 (.3 +5% of atten setting) 1.8:1 150 50 -- -- -- -- 5.25 -4.75 0.8 5.0 6 -1 Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz Pin Configuration Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Function GND C16 C8 C4 C2 GND GND N/C N/C N/C 1 AT90-0233 V 1.00 Recommended PCB Layout 2 Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Function N/C N/C N/C N/C N/C N/C N/C N/C N/C GND RF2 GND N/C1 VEE N/C VCC 2. Application Note C2083 is available on line at www.macom.com GND RF1 GND N/C N/C N/C 1. Pins 10 and 29 must be isolated. Absolute Maximum Ratings 3 Parameter Absolute Maximum +27 dBm +34 dBm +5.5V -8.5V 4 Truth Table C16 0 0 0 0 1 1 C6 0 0 0 1 0 1 C4 0 0 1 0 0 1 C2 0 1 0 0 0 1 Attenuation Loss, Reference 2.0 dB 4.0 dB 8.0 dB 16.0 dB 30.0 dB Max. Input Power 0.05 GHz 0.5 - 2.5 GHz +Vcc -Vee Logic Voltages -0.5 to +Vcc + 0.5V -40C to +85C -65C to +125C Operating Temperature Storage Temperature 0 = TTL Low; 1 = TTL High 3. Operation of this device above any one of these parameters may cause permanent damange. 4. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. Ordering Information Part Number AT90-0233 AT90-0233TR AT90-0233-TB Package Bulk Packaging Tape and Reel (1K Reel) Units Mounted on Test Board 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 - 2.5 GHz Typical Performance Curves AT90-0233 V 1.00 Insertion Loss 3.00 VSWR @ Insertion Loss Output 1.60 Input Attenuation (dB) 2.50 1.40 2.00 VSWR 1.20 1.00 0 500 1000 1500 2000 2500 1.50 1.00 0 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) Attenuation Error, 2 dB Bit 0.30 0.20 0.40 Attenuation Error, 4 dB Bit Attenuation (dB) 0.10 0.00 -0.10 -0.20 -0.30 0 500 1000 1500 2000 2500 Attenuation (dB) 0.20 0.00 -0.20 -0.40 0 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) Attenuation Error, 8 dB Bit 0.40 0.00 Attenuation Error, 16 dB Bit Attenuation (dB) 0.00 Attenuation (dB) 0 500 1000 1500 2000 2500 0.20 -0.20 -0.40 -0.20 -0.60 -0.40 -0.80 0 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) 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 Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz Typical Performance Curves AT90-0233 V 1.00 Attenuation Error, Max. Attenuation 0.50 VSWR, 2 dB Bit Output 1.60 Input Attenuation (dB) 0.00 1.40 -0.50 VSWR 1.20 1.00 0 500 1000 1500 2000 2500 -1.00 -1.50 0 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) VSWR, 4 dB Bit Output 1.60 Input VSWR, 8 dB Bit Output 1.60 Input 1.40 1.40 VSWR 1.20 VSWR 1.20 1.00 0 500 1000 1500 2000 2500 1.00 0 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) VSWR, 16 dB Bit Output 1.60 Input VSWR, Maximum Attenuation Output 1.60 Input 1.40 1.40 VSWR 1.20 VSWR 1.20 1.00 0 500 1000 1500 2000 2500 1.00 0 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) 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. 4 |
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