GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC–2 GHz AA280-25 (Previously AD280-25)* Features SOIC-16 ■ Attenuation 0.5 dB Steps to 15.5 dB with High Accuracy 0.050 (1.27 mm) BSC PIN 16 ■ Low DC Power Consumption 0.244 (6.20 mm) 0.228 (5.80 mm) PIN 1 INDICATOR ■ Low Cost SOIC-16 Plastic Package PIN 1 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. 0.020 (0.51 mm) 0.013 (0.33 mm) 0.068 (1.73 mm) MAX. 0.016 MAX. (0.41 mm) x 45˚ CHAMFER 0.049 (1.24 mm) 0.016 (0.41 mm) 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 -40°C to +85°C (0, -5 V) Parameter1 Insertion Frequency2 Condition Loss3 Min. Typ. Max. Unit DC–0.5 GHz DC–1.0 GHz DC–2.0 GHz 1.1 1.4 1.7 1.3 1.7 2.0 dB dB dB DC–1.0 GHz ± (0.2 + 3% of Attenuation Setting in dB) ± (0.4 + 3% of Attenuation Setting in dB) Attenuation Range 15.5 Attenuation Accuracy3 DC–2.0 GHz VSWR (I/O)4 DC–2.0 GHz Switching Characteristics5 Rise, Fall (10/90% or 90%/10% RF) On, Off (50% CTL to 90%/10% RF) Video Feedthru Input Power for 1 dB Compression Intermodulation Intercept Point (IP3) Control Voltages 1.4:1 For Two-tone Input Power +5 dBm dB dB dB 1.8:1 15 25 25 nS nS mV 0.5–2.0 GHz 0.05 GHz +24 +17 +29 +22 dBm dBm 0.5–2.0 GHz 0.05 GHz +44 +35 +50 +40 dBm dBm VLow = 0 to 0.2 V @ 20 µA Max. VHigh = -5 V @ 300 µA Max. 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. DC = 300 kHz. 3. Attenuation referenced to insertion loss. 4. Input/Output 5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. *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 [email protected] • 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 1.5 15.5 dB 1.4 -40˚C 8 dB 4 dB -1.00 +85˚C VSWR Insertion Loss (dB) -0.75 +25˚C -1.25 1.2 -1.50 1 dB 0.5 dB Ins. Loss 1.1 -1.75 -2.00 1.0 0 0.5 1.0 1.5 2.0 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency VSWR vs. Frequency (25˚C) 58 1.5 +25˚C 15.5 dB 56 8 dB 1.4 4 dB +85˚C 54 VSWR IP3 (dBm) 2 dB 1.3 -40˚C 52 2 dB 1.3 1.2 50 Ins. Loss 0.5 dB 1.1 48 1 dB 46 1.0 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 (85˚C) Compression Point vs. Attenuation, Voltage, and Temperature 1.5 15.5 dB Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss -5 28.30 28.10 29.10 0.5 dB -5 28.50 28.30 29.40 1.0 dB -5 28.70 28.70 29.60 2.0 dB -5 28.40 28.30 29.10 4.0 dB -5 32.90 32.90 33.90 8.0 dB -5 36.80 36.80 36.80 15.5 dB -5 32.70 32.10 32.80 VSWR 1.4 8 dB 4 dB 1.3 2 dB 1.2 Ins. Loss 0.5 dB 1.1 1 dB 1.0 0 0.5 1.0 1.5 Frequency (GHz) VSWR vs. Frequency (-40˚C) 2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 11/00A 2.0 GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC–2 GHz AA280-25 20 0.4 Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 0.5 0.3 8 dB 0.2 4 dB 2 dB 0.1 0 -0.1 -0.2 15.5 dB -0.3 1 dB 0.5 dB 15 15.5 dB 10 8 dB 0 -5 0 0.5 1.0 1.5 2.0 0 1.5 2.0 Attenuation Accuracy vs. Frequency (25˚C) Attenuation Phase Accuracy vs. Frequency (25˚C) 20 Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 1.0 Frequency (GHz) 0.4 0.3 8 dB 0.2 2 dB 4 dB 0.1 0 -0.1 -0.2 -0.3 15.5 dB -0.4 1 dB 0.5 dB 15 15.5 dB 10 4 dB 8 dB 5 0 2 dB 1 dB 0.5 dB -5 -0.5 0 0.5 1.0 1.5 0 2.0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (85˚C) Attenuation Phase Accuracy vs. Frequency (85˚C) 0.5 20 0.4 0.3 8 dB 0.2 4 dB Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 0.5 Frequency (GHz) 0.5 2 dB 0.1 0 0.5 dB -0.1 -0.2 15.5 dB -0.3 1 dB 15 15.5 dB 10 4 dB 5 0 0.5 dB -0.4 -0.5 1 dB 8 dB 2 dB -5 0 3 0.5 dB 1 dB -0.4 -0.5 2 dB 4 dB 5 0.5 1.0 1.5 2.0 0 0.5 1.0 1.5 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (-40˚C) Attenuation Phase Accuracy vs. Frequency (-40˚C) Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 11/00A 2.0 GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC–2 GHz AA280-25 Typical Performance Data (0, -3 V) 0.5 Deviation from Nominal Attenuation (dB) -0.50 Insertion Loss (dB) -0.75 -40˚C -1.00 85˚C -1.25 +25˚C -1.50 -1.75 0.4 0.3 0.2 8 dB 0.1 4 dB 2 dB 0 -0.1 0.5 dB 1 dB -0.2 15.5 dB -0.3 -0.4 -0.5 -2.00 0 0.5 1.0 1.5 0 2.0 2.0 Attenuation Accuracy vs. Frequency (25˚C) Deviation from Nominal Attenuation (dB) 15.5 dB VSWR 1.5 Insertion Loss vs. Frequency 1.4 8 dB 1.3 4 dB 2 dB 1.2 Ins. Loss 0.5 dB 1.1 1 dB 1.0 0 0.5 1.0 1.5 2.0 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 8 dB 4 dB 2 dB 0.5 dB 1 dB 15.5 dB 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency (25˚C) Attenuation Accuracy vs. Frequency (85˚C) 25 0.5 20 15 15.5 dB 10 1 dB 4 dB 5 8 dB 0 2 dB 0.5 dB Deviation from Nominal Attenuation (dB) Deviation from Nominal Insertion Phase (Deg.) 1.0 Frequency (GHz) 1.5 0.4 0.3 0.2 8 dB 0.5 dB 4 dB 2 dB 0.1 0 -0.1 1 dB -0.2 15.5 dB -0.3 -0.4 -0.5 -5 0 4 0.5 Frequency (GHz) 0.5 1.0 1.5 2.0 0 0.5 1.0 1.5 Frequency (GHz) Frequency (GHz) Attenuation Phase Accuracy vs. Frequency (25˚C) Attenuation Accuracy vs. Frequency (-40˚C) Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 11/00A 2.0 GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC–2 GHz Compression Point vs. Attenuation, Voltage, and Temperature 57 56 55 Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss -3 22.70 23.30 24.20 +85˚C 54 IP3 (dBm) AA280-25 53 52 +25˚C 51 50 -40˚C 49 48 47 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0.5 dB -3 23.50 24.20 25.10 1.0 dB -3 24.60 25.00 25.90 2.0 dB -3 22.90 23.40 24.30 4.0 dB -3 31.60 31.80 33.10 8.0 dB -3 31.00 28.70 26.40 15.5 dB -3 25.00 24.40 25.00 Attenuation (dB) IP3 vs. Attenuation and Temperature Pin Out J1 Truth Table GND GND GND GND GND GND 16 V1 V2 V3 V4 0.5 dB Bit 1 dB Bit -5 -5 -5 0 -5 0 -5 0 Reference I.L. 2 dB Bit V5 V6 V7 4 dB Bit V8 Attenuation J1–J2 8 dB Bit 0 -5 -5 0 -5 0 -5 0 0.5 dB -5 0 -5 0 -5 0 -5 0 1 dB -5 -5 0 -5 -5 0 -5 0 2 dB -5 -5 -5 0 0 -5 -5 0 4 dB -5 -5 -5 0 -5 0 0 -5 8 dB 0 0 0 -5 0 -5 0 -5 15.5 dB Max. Atten. 15 8 dB 14 13 4 dB 12 11 2 dB 1 2 3 4 5 V8 V7 V6 V5 V4 10 Characteristic 6 V3 7 8 V2 V1 Value 2.0 W > 500 MHz 0/-8 V 0.5 W > 50 MHz 0/-8 V Control Voltage +0.2 V, -8 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C ΘJC 85°C/W Note: Exceeding these ratings may cause irreversible damage. 5 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 11/00A 9 1 dB 0.5 dB Absolute Maximum Ratings RF Input Power J2