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| Preliminary GaAs IC 25 dB Voltage Variable Attenuator 2.7-4.0 GHz AV141-321 Features Power Control for 3.5 GHz Fixed Wireless Applications Minimum 25 dB Attenuation Positive 0.2-1.2 V Control Voltage QFN-12 3 x 3 mm Package Low Cost No External Components Needed Description The AV141-321 is a GaAs IC PHEMT voltage variable attenuator that has been designed for WLAN applications. Operating from 2.7-4.0 GHz, the AV141-321 is ideal for low cost applications such as 3.5 GHz fixed wireless LAN power control applications. Absolute Maximum Ratings Characteristic RF Input Power Control Voltage Operating Temperature Storage Temperature Value 1 W Max. > 500 MHz -0.2 V, +6 V -40C to +85C -65C to +150C 1. All measurements made in a 50 system, unless otherwise specified. 2. For worst case state. Electrical Specifications at 25C Parameter Insertion Loss (VC = 1.2 V) Maximum Attenuation (VC = 0.2 V) VSWR -- All Ports Frequency 2.7-4.0 GHz 2.7-4.0 GHz 2.7-4.0 GHz 25 Min. Typ. 0.7 30 1.5 1.8 Max. 1.0 Unit dB dB Operating Characteristics at 25C (0, +1.2 V) Parameter Switching Characteristics Condition Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru 2.7-4.0 GHz 2.7-4.0 GHz 0.2 Frequency Min. 80 Typ. 50 150 25 13 20 1.2 Max. Unit ns ns mV dBm dBm V Maximum Input Power for < 1 dB Attenuation Variation Input 3rd Order Intercept Point (IIP3) Control Voltage 1. All measurements made in a 50 system, unless otherwise specified. 2. For worst case state. Alpha Industries, Inc. [978] 241-7000 * Fax [978] 241-7906 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 1/02A 1 GaAs IC 25 dB Voltage Variable Attenuator 2.7-4.0 GHz AV141-321 Typical Performance Data at 25C -0.4 0 Maximum Attenuation (dB) -0.5 -5 -10 -15 -20 -25 -30 -35 -40 2.8 3.0 3.2 3.4 3.6 3.8 4.0 Insertion Loss (dB) -0.6 -0.7 -0.8 -0.9 -1.0 2.8 3.0 3.2 3.4 3.6 3.8 4.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 0 -5 Maximum Attenuation vs. Frequency 1.8 Attenuation (dB) -10 1.6 Output VSWR -15 -20 -25 -30 -35 -40 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Input 1.2 1.0 0.2 0.4 0.6 0.8 1.0 1.2 VC (V) VC (V) Attenuation vs. Control Voltage 1.8 Maximum Attenuation 1.6 22 VSWR vs. Control Voltage 21 IIP3 (dBm) VSWR 1.4 Minimum Attenuation 1.2 20 19 1.0 2.8 3.0 3.2 3.4 3.6 3.8 4.0 18 2.8 3.0 3.2 3.4 3.6 3.8 4.0 Frequency (GHz) Frequency (GHz) Output VSWR vs. Frequency Input IP3 vs. Frequency 2 Alpha Industries, Inc. [978] 241-7000 * Fax [978] 241-7906 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 1/02A GaAs IC 25 dB Voltage Variable Attenuator 2.7-4.0 GHz AV141-321 Evaluation Board Layout QFN-12 0.118 (3.00 mm) PIN 1 INDICATOR 0.008 (0.20 mm) SEATING PLANE 0.001 (0.02 mm) 0.118 (3.00 mm) SK39506 VVA Test Board 0.030 (0.75 mm) 0.002 (0.05 mm) PIN 1 INDICATOR EXPOSED PAD 0.029 (0.73 mm) 0.009 (0.23 mm) + 0.003 (0.07 mm) - 0.002 (0.05 mm) 0.0196 (0.50 mm) BSC 0.057 (1.45 mm) SQ. + 0.004 (0.10 mm) - 0.006 (0.15 mm) Pin Out N/C N/C 11 12 10 N/C J1 N/C N/C 1 2 3 9 8 7 N/C J2 N/C 4 5 N/C Ground is connected to paddle on bottom. Typical S-Parameters (Control Voltage 0/+1.2 V) Insertion Loss State # GHZ S MA R 50 Freq. (GHz) 2.5 3.0 3.5 4.0 S11 0.330 0.242 0.165 0.070 S11a 66.05 18.19 -33.76 -68.30 S21 S21a S12 S12a S22 S22a 45.02 -22.04 -94.37 High Attenuation State # GHZ S MA R 50 S11 0.160 S11a 5.13 S21 0.074 0.021 S21a 126.57 46.26 S12 0.074 0.021 S12a 126.20 46.12 S22 0.161 0.172 S22a -18.79 -71.10 0.887 -135.38 0.913 0.914 -175.58 0.946 0.913 144.77 0.916 103.60 0.951 0.959 VC N/C 6 -135.67 0.312 -175.25 0.210 144.79 103.52 0.145 0.129 -40.89 0.152 -97.28 0.134 -151.61 0.026 -107.80 0.026 -107.54 0.209 -118.44 0.046 -178.59 0.047 -179.41 0.224 -161.45 0.080 -152.16 Measured S-Parameters include the evaluation board. Alpha Industries, Inc. [978] 241-7000 * Fax [978] 241-7906 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 1/02A 3 |
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