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| AT-118 Voltage Variable Absorptive Attenuator Features * * * * * Single Positive Control 0 to 3 Volts 15 dB Voltage Variable Attenuation 2 dB Linearity from BSL Positive Control Logic Low Cost MSOP-8 Plastic Package MSOP-81 R .0 1 0 ID P IN 0 .0 0 7 0 .1 1 8 4X 12 0 .1 9 3 .0 2 0 .0 2 0 0 .1 1 8 0 .0 2 5 6 0 .0 2 1 Description M/A-COM's AT-118 is a linear GaAs MMIC voltage variable absorptive attenuator in a low cost MSOP-8 surface mount plastic package. The AT-118 is ideally suited for applications where linear attenuation and fine tuning are required. Typical applications include radio, cellular, GPS equipment and automatic gain/level control circuits. The AT-118 is fabricated with a mature 1 micron gate length GaAs MESFET process. The process features full chip passivation for increased performance and reliability. 1. 4X 12 3 0 .0 3 4 0 .0 1 3 0 .0 0 8 0 .0 4 0 Dimensions are in inches. Ordering Information Part Number AT-118 PIN AT-118TR Package MSOP 8-Lead Plastic Forward Tape and Reel1 1. Reference Application Note M513 for reel size information. Electrical Specifications: TA = +25C1= Parameter Insertion Loss Attenuation Insertion Loss Flatness (Peak-to-Peak) VSWR Trise, Tfall Ton, Toff Transients 1. Test Conditions 0.5 - 3.0 GHz 0.5 - 1.0 GHz 1.0 - 3.0 GHz 0.5 - 3.0 GHz 0.5 - 3.0 GHz 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, Control to 10% RF In-band Units dB dB dB dB S S mV Min. 12 15 Typ. 1.6 14 16 0.3 2:1 10 12 10 Max. 1.9 0.5 All measurements taken at 900 GHz in a 50 system unless otherwise specified. Loss varies at 0.003 dB/C. Specifications subject to change without notice. North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. V 4.0 1 Voltage Variable Absorptive Attenuator Absolute Maximum Ratings1 Parameter Maximum Input Power Supply Voltage VCC Control Voltage VC Operating Temperature Storage Temperature 1. AT-118 Functional Schematic1, 2, 3 Absolute Maximum +21 dBm -1V, +8V -1V, VCC +0.5V -40C to +85C -65C to +150C GND RF Vcc GND 1 2 3 4 8 7 6 5 GND RF Vc GND Exceeding any one or a combination of these limits may cause permanent damage. 1. 2. 3. 4. VCC = +3 VDC @ 20 A max. VC = 0 VDC to +3 VDC @ 75 A max. External DC blocking capacitors are required on all RF ports. 39 pF used for data measurements. Typical Performance Curves 0 -0.2 -0.4 -0.6 -0.8 -1 -1.2 -1.4 -1.6 -1.8 -2 Q Insertion Loss vs. Frequency 0 -2 Attenuation vs. Control Voltage ATTENUATION (dB) CONTROL VOLTAGE -4 -6 -8 -10 -12 -14 -16 -18 3 2.5 2 1.5 1 0.5 0 1.8 GHz 2.4 GHz 900 MHz LOSS (dB) 0.5 1 1.5 2 2.5 3 FREQUENCY (GHz) ATTENUATION (dB) CONTROL VOLTAGE (Volts) 0 -2 ATTENUATION (dB) -4 -6 -8 -10 -12 -14 -16 -18 Attenuation vs. Frequency @ Vc = 0V ATTENUATION (dB) 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 Typical Device Variation F = 900 MHz 0.5 1 1.5 2 2.5 3 3 2.5 2 1.5 1 0.5 0 FREQUENCY (GHz) CONTROL VOLTAGE CONTROL VOLTAGE (Volts) Specifications subject to change without notice. North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. V 4.0 2 Voltage Variable Absorptive Attenuator Typical Performance Curves (Cont'd) Attenuation vs. Temperature Normalized to +25C 35 30 + 85C AT-118 1 ATTENUATION DELTA (dB) 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 IP3 vs. Control Voltage 500 MHz 25 IP3 (dBm) 20 15 10 5 0 0.5 1 1.5 2 2.5 3 900 MHz - 40C 0 0 0.5 1 1.5 2 2.5 3 CONTROL VOLTAGE CONTROL VOLTAGE (Volts) CONTROL VOLTAGE (Volts) CONTROL VOLTAGE 0 RETURN LOSS (dB) -5 -10 -15 Return Loss vs. Control Voltage COMPRESSION POINT (dBm) F = 900 MHz 16 14 1 dB Compression vs. Control Voltage 900 MHz 12 10 8 6 4 2 0 0 0.5 1 1.5 2 2.5 3 500 MHz INPUT OUTPUT -20 -25 0 0.5 1 1.5 2 2.5 3 CONTROL VOLTAGE CONTROL VOLTAGE (Volts) CONTROL VOLTAGE CONTROL VOLTAGE (Volts) Specifications subject to change without notice. North America: Tel. (800) 366-2266, Fax (800) 618-8883 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. V 4.0 3 |
Price & Availability of AT-118TR
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