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| GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC-2 GHz AA280-25 (Previously AD280-25)* Features I Attenuation 0.5 dB Steps to 15.5 dB with High Accuracy I Low DC Power Consumption I Low Cost SOIC-16 Plastic Package SOIC-16 PIN 16 0.050 (1.27 mm) BSC PIN 1 INDICATOR 0.244 (6.20 mm) 0.228 (5.80 mm) Description The AD280-25 is a 5 bit, GaAs IC FET digital attenuator in a low cost SOIC-16 package. This attenuator has an LSB of 0.5 dB and a total attenuation of 15.5 dB. The AD280-25 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include cellular radio, wireless data, wireless local loop and other gain level control circuits. PIN 1 0.068 (1.73 mm) MAX. 0.020 (0.51 mm) 0.013 (0.33 mm) 0.049 (1.24 mm) 0.016 (0.41 mm) 0.016 MAX. (0.41 mm) x 45 CHAMFER 8 MAX. 0.394 (10.00 mm) 0.386 (9.80 mm) 0.010 (0.25 mm) 0.004 (0.10 mm) 0.0098 (0.25 mm) 0.0075 (0.19 mm) 0.158 (4.00 mm) 0.150 (3.80 mm) Electrical Specifications at -40C to +85C (0, -5 V) Parameter1 Insertion Loss3 Condition Frequency2 DC-0.5 GHz DC-1.0 GHz DC-2.0 GHz DC-1.0 GHz DC-2.0 GHz VSWR (I/O)4 Switching Characteristics5 Rise, Fall (10/90% or 90%/10% RF) On, Off (50% CTL to 90%/10% RF) Video Feedthru 0.5-2.0 GHz 0.05 GHz For Two-tone Input Power +5 dBm VLow = 0 to 0.2 V @ 20 A Max. VHigh = -5 V @ 300 A Max. 4. Input/Output 5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. Min. Typ. 1.1 1.4 1.7 15.5 Max. 1.3 1.7 2.0 Unit dB dB dB dB dB dB nS nS mV dBm dBm dBm dBm Attenuation Range Attenuation Accuracy3 (0.2 + 3% of Attenuation Setting in dB) (0.4 + 3% of Attenuation Setting in dB) 1.4:1 15 25 25 +24 +17 +44 +35 +29 +22 +50 +40 1.8:1 DC-2.0 GHz Input Power for 1 dB Compression Intermodulation Intercept Point (IP3) Control Voltages 0.5-2.0 GHz 0.05 GHz 1. All measurements made in a 50 system, unless otherwise specified. 2. DC = 300 kHz. 3. Attenuation referenced to insertion loss. *Due to conflict with another company's product numbering system, Alpha's attenuator products starting with the letters "AD" are being changed to "AA". Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 11/00A 1 GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC-2 GHz AA280-25 Typical Performance Data (0, -5 V) -0.50 -0.75 -40C 1.5 1.4 +85C -1.25 -1.50 -1.75 -2.00 0 0.5 1.0 1.5 2.0 1.1 1.0 0 0.5 1.0 1.5 2.0 +25C 1.3 1.2 1 dB 0.5 dB Ins. Loss 15.5 dB 8 dB 4 dB 2 dB Insertion Loss (dB) -1.00 Frequency (GHz) VSWR Frequency (GHz) Insertion Loss vs. Frequency 58 +25C 56 1.4 +85C -40C 1.5 VSWR vs. Frequency (25C) 15.5 dB 8 dB 4 dB 2 dB IP3 (dBm) 54 52 50 48 46 VSWR 1.3 1.2 0.5 dB 1.1 1 dB 1.0 Ins. Loss 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 0.5 1.0 1.5 2.0 Attenuation (dB) Frequency (GHz) IP3 vs. Attenuation and Temperature VSWR vs. Frequency (85C) 1.5 15.5 dB 1.4 8 dB 4 dB Compression Point vs. Attenuation, Voltage, and Temperature VSWR Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25C (dBm) +85C (dBm) -40C (dBm) Ins. Loss -5 28.30 28.10 29.10 0.5 dB 1.0 dB 2.0 dB 4.0 dB 8.0 dB 15.5 dB -5 -5 -5 -5 -5 -5 28.50 28.70 28.40 32.90 36.80 32.70 28.30 28.70 28.30 32.90 36.80 32.10 29.40 29.60 29.10 33.90 36.80 32.80 1.3 1.2 0.5 dB 1.1 1 dB 1.0 0 0.5 1.0 1.5 Ins. Loss 2 dB 2.0 Frequency (GHz) VSWR vs. Frequency (-40C) 2 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 11/00A GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC-2 GHz AA280-25 0.5 20 Deviation from Nominal Attenuation (dB) 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 0.5 1.0 1.5 2.0 15.5 dB 1 dB 0.5 dB 8 dB 4 dB 2 dB Deviation from Nominal Insertion Phase (Deg.) 0.4 15 15.5 dB 10 5 0 1 dB -5 0 0.5 1.0 1.5 2.0 4 dB 8 dB 2 dB 0.5 dB Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (25C) 0.5 20 Attenuation Phase Accuracy vs. Frequency (25C) Deviation from Nominal Attenuation (dB) Deviation from Nominal Insertion Phase (Deg.) 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 0.5 1.0 1.5 2.0 15.5 dB 1 dB 0.5 dB 8 dB 4 dB 2 dB 15 15.5 dB 10 4 dB 5 0 2 dB -5 0 0.5 1.0 1.5 2.0 1 dB 0.5 dB 8 dB Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (85C) 0.5 20 Attenuation Phase Accuracy vs. Frequency (85C) Deviation from Nominal Attenuation (dB) 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 0.5 Deviation from Nominal Insertion Phase (Deg.) 0.4 8 dB 4 dB 2 dB 15 15.5 dB 10 5 0 -5 4 dB 8 dB 0.5 dB 15.5 dB 1 dB 0.5 dB 1 dB 2 dB 1.0 1.5 2.0 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (-40C) Attenuation Phase Accuracy vs. Frequency (-40C) 3 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 11/00A GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC-2 GHz AA280-25 Typical Performance Data (0, -3 V) -0.50 -0.75 0.5 Deviation from Nominal Attenuation (dB) 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 15.5 dB 0.5 dB 1 dB 8 dB 4 dB 2 dB Insertion Loss (dB) -40C -1.00 -1.25 +25C -1.50 -1.75 -2.00 0 0.5 1.0 1.5 2.0 85C 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Attenuation Accuracy vs. Frequency (25C) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 0 1.5 1.4 8 dB 4 dB Deviation from Nominal Attenuation (dB) 15.5 dB 8 dB 4 dB 2 dB 0.5 dB 1 dB VSWR 1.3 1.2 0.5 dB 1.1 1 dB 1.0 0 0.5 1.0 1.5 2.0 2 dB Ins. Loss 15.5 dB 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency (25C) Attenuation Accuracy vs. Frequency (85C) 0.5 25 Deviation from Nominal Insertion Phase (Deg.) 20 15 10 1 dB 5 0 -5 0 0.5 1.0 1.5 2.0 4 dB 8 dB 2 dB 0.5 dB 15.5 dB Deviation from Nominal Attenuation (dB) 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 0.5 1.0 1.5 2.0 15.5 dB 1 dB 0.5 dB 8 dB 4 dB 2 dB Frequency (GHz) Frequency (GHz) Attenuation Phase Accuracy vs. Frequency (25C) Attenuation Accuracy vs. Frequency (-40C) 4 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 11/00A GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC-2 GHz AA280-25 57 56 55 54 +85C Compression Point vs. Attenuation, Voltage, and Temperature Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25C (dBm) +85C (dBm) -40C (dBm) Ins. Loss -3 22.70 23.30 24.20 0.5 dB 1.0 dB -40C 2.0 dB 4.0 dB 8.0 dB 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15.5 dB -3 -3 -3 -3 -3 -3 23.50 24.60 22.90 31.60 31.00 25.00 24.20 25.00 23.40 31.80 28.70 24.40 25.10 25.90 24.30 33.10 26.40 25.00 IP3 (dBm) 53 52 51 50 49 48 47 +25C Attenuation (dB) IP3 vs. Attenuation and Temperature Pin Out J1 GND GND GND GND GND GND 15 14 13 12 11 10 J2 9 Truth Table V1 0.5 dB Bit -5 0 -5 -5 -5 -5 0 V2 1 dB Bit -5 -5 0 -5 -5 -5 0 V3 V4 V5 V6 V7 V8 2 dB Bit -5 -5 -5 0 -5 -5 0 0 0 0 -5 0 0 -5 4 dB Bit -5 -5 -5 -5 0 -5 0 0 0 0 0 -5 0 -5 8 dB Bit -5 -5 -5 -5 -5 0 0 0 0 0 0 0 -5 -5 Attenuation J1-J2 Reference I.L. 0.5 dB 1 dB 2 dB 4 dB 8 dB 15.5 dB Max. Atten. 16 8 dB 4 dB 2 dB 1 dB 0.5 dB 1 2 3 4 5 6 7 8 V8 V7 V6 V5 V4 V3 V2 V1 Absolute Maximum Ratings Characteristic RF Input Power Control Voltage Operating Temperature Storage Temperature JC Value 2.0 W > 500 MHz 0/-8 V 0.5 W > 50 MHz 0/-8 V +0.2 V, -8 V -40C to +85C -65C to +150C 85C/W Note: Exceeding these ratings may cause irreversible damage. 5 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 11/00A |
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