AT-119 2.25 Volt Voltage Variable Absorptive Attenuator - 40 dB, 1.8—2.5 GHz Features Functional Schematic Single Positive Voltage Control 0 to +2.25 Volts >50 dB Attenuation Range at 2.1 GHz Low DC Power Consumption Low Cost SOT-25 Plastic Package Tape and Reel Packaging Available VCC 5 VCTL 4 Description M/A-COM’s AT-119 is a GaAs MMIC voltage variable absorptive attenuator in a low cost, SOT-25 five-lead, surface mount plastic package. M/A-COM fabricates the AT-119 with a proven monolithic GaAs self-aligned gate process that features full chip passivation for performance and reliability Applications The AT-119 is ideally suited for applications that require fine tuning, linear attenuation with voltage, and very low power consumption. Typical applications for the AT-119 include automatic gain control circuits in satellite radio receivers and other wireless receivers. 1 RF 100 pF 2 GND 3 RF 100 pF 1. VCC = +3.3 VDC @ 50 µA max. 2. VCTL = 0 VDC to +3.3 VDC @ 50 µA max. 3. External DC blocking capacitors are required on all RF ports. Absolute Maximum Ratings1 @ TA = +25 °C (unless otherwise specified) Parameter Absolute Maximum Maximum Input Power +21 dBm Supply Voltage VCC -1 V, + 8 V ControlVoltage VCTL -1 V, VCC +0.5 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 1. Exceeding any one or a combination of these limits may cause permanent damage. Electrical Specifications @ TA = +25 °C, Frequency = 2.4 GHz, VCC = 3.3 VDC1 Parameters Test Conditions Units Min Minimum Insertions Loss VCTL = 2.25 VDC dB Maximum Attenuation VCTL = 0.5 VDC dB 37 Attenuation Slope 0.75 VDC < VCTL < 1.75 VDC dB/V 24 Typ Max 3.0 3.2 Return Loss 0.6 VDC < VCTL < 1.75 VDC dB >12 Input Power for 1 dB Change in Attenuation 0 VDC < VCTL < 3.0 VDC dBm >10 Input 3rd Order Intercept Point 0 VDC < VCTL < 3.0 VDC dBm >20 Switching Speed 50% VCTL to 10% / 90% RF nSec 180 Transients VCTL = 3 VDC, In-Band mV 10 1. All measurements in a 50-τ system unless otherwise specified. The RF ports must be blocked outside of the package from ground or any other voltage. 2.25 Volt Voltage Variable Absorptive Attenuator, 40 dB, 1.8 - 2.5 GHz AT-119 Typical Performance Curves Attenuation vs. Frequency @ 0.0 VDC for Control Voltage Attenuation vs. Control Voltage, +25 °C 0 0.0 5.0 5 10.0 10 15.0 15 1.8 GHz 20.0 20 25.0 25 30.0 +25 deg C 30 2.4 GHz 35.0 35 40.0 40 45.0 45 50.0 55.0 +85 deg C 50 2.1 GHz -40 deg C 55 60.0 60 3.0 2.5 2.0 1.5 1.0 0.5 0.0 CONTROL VOLTAGE (Volts) 500 1000 1500 2000 2500 3000 FREQUENCY (MHz) Insertion Loss vs. Frequency @ 2.25 VDC for Control Voltage Return Loss vs. Control Voltage @ +25 °C 0 4.0 3.5 -5 3.0 2.4 GHz +25 deg C +85 deg C 2.5 2.1 GHz -10 -40 deg C -15 2.0 1.5 -20 1.0 1.8 GHz -25 0.5 -30 0.0 500 1000 1500 2000 2500 3000 3.0 2.5 FREQUENCY (MHz) 2.0 1.5 1.0 0.5 0.0 CONTROL VOLTAGE (VDC) Insertion Loss Delta Normalized to +25 °C Insertion Loss Delta Normalized to +25 °C 6 6 o -40 C o +85 C 4 4 1.8 GHz 2 1.8 GHz 2.4 GHz 2 2.4 GHz 0 0 -2 -2 -4 -4 2.1 GHz 2.1 GHz -6 3.0 -6 2.5 2.0 1.5 1.0 0.5 0.0 CONTROL VOLTAGE (VDC) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 CONTROL VOLTAGE (VDC) Specifications subject to change without notice. North America: Tel. (800) 366-2266 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. 2 2.25 Volt Voltage Variable Absorptive Attenuator, 40 dB, 1.8 - 2.5 GHz AT-119 Typical Performance Curves (Cont’d) Input Power for 1 dB Change in Attenuation: +25 °C Input IP3 vs. Control Voltage: +25 °C 20 40 Input Power = 0 dBm 35 2.4 1.8 GHz 15 30 25 10 1.8 GHz 20 15 5 2.4 GHz 10 5 0 0 3.0 2.5 2.0 1.5 1.0 0.5 0.0 3 2.5 2 1.5 1 0.5 0 CONTROL VOLTAGE (VDC) CONTROL VOLTAGE (VDC) Typical Device Variation, Attenuation vs. VCTL 0 5 Freq = 2.4 GHz 10 15 20 25 30 35 40 45 50 55 60 3.0 2.5 2.0 1.5 1.0 0.5 0.0 VCTL (VDC) Specifications subject to change without notice. North America: Tel. (800) 366-2266 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 2.25 Volt Voltage Variable Absorptive Attenuator, 40 dB, 1.8 - 2.5 GHz SOT-25 1 SOT-25 1 Dimensions DIM D PIN 5 Measurement (mm) MIN A2 e1 WZ X Y E1 AT-119 E L PIN 5 e c ° A1 A b 1. See JEDEC MO-178 VAR AA for additional dimensions and tolerances NOM MAX A 1.45 A1 0.15 A2 0.90 1.15 b 0.30 0.50 c 0.08 0.22 D 2.90 basic e 0.95 basic e1 1.90 basic E 2.80 basic E1 1.60 basic 1.30 L 0.30 0.60 0.45 ° 0° 4° 8° Ordering Information Part Number Package AT-119TR Tape and Reel1 AT-119TR-3000 3000 Piece Tape and Reel AT-119SMB Sample Board 1. If specific reel size is required, consult factory for part number assignment. Specifications subject to change without notice. North America: Tel. (800) 366-2266 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. 4