GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz AA260-85 (Previously AD260-85)* Features SSOP-20 ■ Attenuation 1.0 dB Steps to 31 dB with High Accuracy PIN 20 0.209 (5.30 mm) ±0.012 (0.30 mm) ■ Low DC Power Consumption 0.307 (7.80 mm) ±0.016 (0.307 mm) ■ Low Cost SSOP-20 Plastic Package PIN 1 INDICATOR PIN 1 0.283 (7.20 mm) ±0.012 (0.30 mm) Description The AA260-85 is a 5 bit, GaAs IC FET digital attenuator in a low cost SSOP-20 package. This attenuator has an LSB of 1 dB and a total attenuation of 31 dB. The AA260-85 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. 0.069 (1.75 mm) ±0.004 (0.10 mm) 0.0256 0.078 (0.65 mm) (2.00 mm) BSC MAX. 0.012 (0.30 mm) REF. 0.010 (0.25 mm) 0.004 (0.090 mm) 8˚ MAX. 0.008 (0.20 mm) MAX. 0.002 (0.05 mm) MIN. 0.030 (0.75 mm) ±0.008 (0.10 mm) Electrical Specifications at -40°C to +85°C (0, -5 V) Parameter1 Frequency2 Condition Insertion Loss Min. Typ. Max. Unit DC–0.5 GHz DC–1.0 GHz DC–2.0 GHz 1.4 1.6 2.0 1.7 2.0 2.3 dB dB dB DC–1.0 GHz ± (0.2 + 3% of Attenuation Setting in dB) ± (0.4 + 5% of Attenuation Setting in dB) ± (0.5 + 6% of Attenuation Setting in dB) Attenuation Range 31 Attenuation Accuracy3 DC–1.8 GHz DC–2.0 GHz VSWR (I/O) DC–2.0 GHz Switching Characteristics4 Rise, Fall (10/90% or 90%/10% RF) On, Off (50% CTL to 90%/10% RF) Video Feedthru Input Power for 1 dB Compression VHigh = -5 V 0.5–2.0 GHz 0.05 GHz Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm VHigh = -5 V 0.5–2.0 GHz 0.05 GHz Control Voltages 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. 1.4:1 dB dB dB dB 1.7:1 15 25 25 nS nS mV +25 +18 +29 +22 dBm dBm +42 +30 +48 +36 dBm dBm 3. Attenuation referenced to insertion loss. 4. 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. 12/00A 1 GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz AA260-85 Typical Performance Data (0, -5 V) 2.00 -1.2 1.75 +25˚C -1.4 +85˚C VSWR Insertion Loss (dB) -1.0 -40˚C -1.6 1.50 31 dB 8 dB 16 dB 1.25 -1.8 2 dB 4 dB 1 dB -2.0 Ins. Loss 1.00 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) 60 2.00 58 +25˚C 1.75 54 VSWR IP3 (dBm) 56 -40˚C 52 +85˚C 1.50 31 dB 50 1.25 Ins. Loss 46 4 dB 1 dB 44 2 dB 1.00 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 0 0.5 1.0 1.5 2.0 Attenuation (dB) Frequency (GHz) IP3 vs. Attenuation and Temperature (500 MHz) VSWR vs. Frequency (85˚C) Compression Point vs. Attenuation, Voltage, and Temperature 2.00 -5 30.1 29.8 30.5 2 dB -5 29.5 29.4 29.6 4 dB -5 34.0 32.7 32.9 8 dB -5 29.5 29.3 29.8 16 dB -5 28.6 28.6 28.3 31 dB -5 32.1 31.6 31.3 1.75 VSWR Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss -5 29.6 29.4 29.9 1 dB 8 dB 16 dB 48 1.50 Ins. Loss 31 dB 16 dB 8 dB 1.25 2 dB 4 dB 1 dB 1.00 0 0.5 1.0 1.5 Frequency (GHz) Frequency = 0.5–2.0 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. 12/00A 2.0 GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz AA260-85 0.5 Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 60 4 dB 8 dB 16 dB 0 1 dB -0.5 2 dB 31 dB -1.0 -1.5 -2.0 50 40 31 dB 30 16 dB 20 8 dB 10 0 4 dB -2.5 0 0.5 1.0 1.5 2.0 0 0.5 1.0 1.5 2.0 Frequency (GHz) Attenuation Accuracy vs. Frequency (25˚C) Attenuation Phase Accuracy vs. Frequency (25˚C) 60 8 dB 4 dB Deviation from Nominal Insertion Phase (Deg.) 16 dB 0 1 dB -0.5 2 dB 31 dB -1.0 -1.5 -2.0 50 40 31 dB 30 20 16 dB 8 dB 10 0 1 dB -2.5 2 dB 4 dB -10 0 0.5 1.0 1.5 2.0 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) 60 0.5 8 dB 4 dB 2 dB 0 1 dB 31 dB -0.5 -1.0 -1.5 -2.0 Deviation from Nominal Insertion Phase (Deg.) 16 dB Deviation from Nominal Attenuation (dB) 1 dB Frequency (GHz) 0.5 Deviation from Nominal Attenuation (dB) 2 dB -10 50 31 dB 40 30 16 dB 20 10 4 dB 0 2 dB 1 dB 1.0 1.5 8 dB -10 -2.5 0 0.5 1.0 1.5 2.0 0 0.5 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. 12/00A 2.0 3 GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz AA260-85 Typical Performance Data (0, -3 V) -1.0 0.5 Deviation from Nominal Attenuation (dB) 16 dB Insertion Loss (dB) -1.2 +25˚C -40˚C +85˚C -1.4 -1.6 -1.8 -2.0 0.5 1.0 1.5 1 dB -1.0 31 dB -1.5 -2.0 -2.5 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Attenuation Accuracy vs. Frequency (25˚C) Deviation from Nominal Attenuation (dB) 0.5 1.75 1.50 31 dB 16 dB 8 dB 1.25 2 dB 4 dB 1 dB Ins. Loss 1.00 0 0.5 1.0 16 dB 0 8 dB 4 dB 2 dB 1 dB -0.5 31 dB -1.0 -1.5 -2.0 -2.5 -3.0 1.5 2.0 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency (25˚C) Attenuation Accuracy vs. Frequency (85˚C) 60 0.5 50 0 31 dB 40 30 20 16 dB 8 dB 10 0 1 dB 4 dB 2 dB -10 Deviation from Nominal Attenuation (dB) 16 dB Deviation from Nominal Insertion Phase (Deg.) 2 dB -0.5 2.0 2.00 8 dB 4 dB 1 dB -0.5 2 dB -1.0 31 dB -1.5 -2.0 -2.5 -3.0 0 4 4 dB -3.0 0 VSWR 8 dB 0 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. 12/00A 2.0 GaAs IC 5 Bit Digital Attenuator 1 dB LSB DC–2 GHz Compression Point vs. Attenuation, Voltage, and Temperature 60 58 +25˚C IP3 (dBm) 56 54 +85˚C 52 50 -40˚C 48 46 44 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Attenuation (dB) 25.9 25.7 2 dB -3 24.7 24.5 24.6 4 dB -3 29.3 28.7 29.0 8 dB -3 32.3 31.7 32.3 16 dB -3 21.6 21.2 21.7 31 dB -3 24.5 24.4 24.9 V7 V8 V9 -5 0 -5 0 -5 0 -5 0 1 dB -5 0 -5 -5 0 -5 0 -5 0 2 dB -5 -5 0 0 -5 -5 0 -5 0 4 dB -5 -5 0 -5 0 0 -5 -5 0 8 dB -5 -5 0 -5 0 -5 0 0 -5 16 dB 0 0 -5 0 -5 0 -5 0 -5 31 dB Max. Atten. V3 V2 NC V1 2 dB 1 dB 11 0 4 dB 12 Reference I.L. 13 0 14 -5 15 0 16 -5 10 0 9 -5 8 0 7 -5 8 dB 6 -5 V6 V5 V4 17 Attenuation J1-J2 5 16 dB Bit 4 8 dB Bit 18 V6 16 dB 19 V5 4 dB Bit V8 V7 20 V9 3 V4 26.2 2 2 dB Bit -3 1 V2 V3 1 dB Pin Out Truth Table V1 Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss -3 24.8 24.7 24.7 Frequency = 0.5–2.0 GHz IP3 vs. Attenuation and Temperature (500 MHz) 1 dB Bit AA260-85 J1 GND GND GND GND GND GND GND GND J2 Absolute Maximum Ratings Characteristic RF Input Power 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. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 12/00A 5