AT-118 Voltage Variable Absorptive Attenuator MSOP-81 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 R .0 1 0 ID P IN 0 .0 0 7 0 .1 9 3 .0 2 0 4X 12° 0 .1 1 8 0 .0 2 5 6 0 .0 2 1 .0 2 0 0 .1 1 8 Description 4X 12° 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. 3° 0 .0 4 0 0 .0 3 4 0 .0 0 8 0 .0 1 3 Typical applications include radio, cellular, GPS equipment and automatic gain/level control circuits. 1. 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. Ordering Information Dimensions are in inches. Part Number Package AT-118 PIN MSOP 8-Lead Plastic AT-118TR Forward Tape and Reel1 1. Reference Application Note M513 for reel size information. Electrical Specifications: TA = +25°C1= 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 µS µS 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 50Ω 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 Functional Schematic1, 2, 3 Absolute Maximum Maximum Input Power +21 dBm Supply Voltage VCC -1V, +8V Control Voltage VC -1V, VCC +0.5V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 1. AT-118 GND 1 8 2 7 Vcc 3 6 Vc GND 4 5 GND RF Exceeding any one or a combination of these limits may cause permanent damage. 1. 2. 3. 4. GND RF VCC = +3 VDC @ 20 µA max. VC = 0 VDC to +3 VDC @ 75 µA max. External DC blocking capacitors are required on all RF ports. 39 pF used for data measurements. 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 Attenuation vs. Control Voltage -2 ATTENUATION (dB) CONTROL VOLTAGE LOSS (dB) Typical Performance Curves -4 -6 900 MHz -8 -10 -12 2.4 GHz -14 1.8 GHz -16 -18 0.5 1 1.5 2 2.5 3 3 2.5 0 Attenuation vs. Frequency @ Vc = 0V 0 1.5 1 0.5 0 0.5 0 Typical Device Variation -2 ATTENUATION (dB) -2 ATTENUATION (dB) 2 ATTENUATION (dB) CONTROL VOLTAGE (Volts) FREQUENCY (GHz) -4 -6 -8 -10 -12 -14 -16 F = 900 MHz -4 -6 -8 -10 -12 -14 -16 -18 -18 0.5 1 1.5 2 2.5 3 FREQUENCY (GHz) 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. 3 2.5 2 1.5 1 CONTROL VOLTAGE CONTROL VOLTAGE (Volts) V 4.0 2 Voltage Variable Absorptive Attenuator AT-118 Typical Performance Curves (Cont’d) Attenuation vs. Temperature Normalized to +25°C 35 0.8 IP3 vs. Control Voltage 500 MHz 30 0.6 + 85C 0.4 25 0.2 IP3 (dBm) ATTENUATION DELTA (dB) 1 0 -0.2 -0.4 - 40C -0.6 20 900 MHz 15 10 5 -0.8 -1 0 0.5 1 1.5 2 2.5 0 3 0 CONTROL VOLTAGE 0.5 CONTROL VOLTAGE (Volts) Return Loss vs. Control Voltage 16 COMPRESSION POINT (dBm) 0 RETURN LOSS (dB) F = 900 MHz -5 -10 1 1.5 2 2.5 3 CONTROL VOLTAGE CONTROL VOLTAGE (Volts) INPUT -15 OUTPUT -20 -25 1 dB Compression vs. Control Voltage 14 900 MHz 12 10 8 6 500 MHz 4 2 0 0 0.5 1 1.5 2 2.5 3 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. 0 0.5 1 1.5 2 2.5 3 CONTROL VOLTAGE CONTROL VOLTAGE (Volts) V 4.0 3