GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz AA264-87 Features TSSOP-16 ■ Attenuation 2 dB Steps to 30 dB with High Accuracy PIN 16 0.173 (4.40 mm) ± 0.004 (0.10 mm) ■ Single Positive Control for Each Bit 0.252 (6.4 mm) BSC PIN 1 INDICATOR ■ Low DC Power Consumption 0.197 (5.00 mm) ± 0.004 (0.10 mm) PIN 1 ■ Small Low Cost TSSOP-16 Plastic Package 0.0256 (0.65 mm) BSC 0.047 (1.20 mm) MAX. R 0.004 (0.09 mm) MIN. Description The AA264-87 is a 4 bit, single positive control GaAs IC FET digital attenuator in a low cost TSSOP-16 package. The attenuator requires external DC blocking capacitors, positive supply voltage (VS) and four individual positive control voltages (V1–V4). The AA264-87 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include base station, wireless data and wireless local loop gain control circuits. 0.009 (0.22 mm) REF. 0.035 (0.90 mm) + 0.006 (0.15 mm) / -0.004 (-0.10 mm) 0.006 (0.15 mm) MAX. 0.002 (0.05 mm) MIN. 0.024 (0.60 mm) ± 0.006 (0.15 mm) Electrical Specifications at -40°C to +85°C (0, +5 V) Parameter1 Condition Insertion Loss Typ. Max. Unit 0.5–1.0 GHz 0.5–2.0 GHz Frequency Min. 1.6 1.8 2.0 2.4 dB dB 0.5–1.0 GHz ± (0.2 + 3% of Attenuation Setting in dB) ± (0.3 + 5% of 2–24 dB Setting) dB ± (0.3 + 6% of 26–30 dB Setting) dB Attenuation Range 30 Attenuation Accuracy2 0.5–2.0 GHz 0.5–2.0 GHz VSWR (I/O)3 0.5–0.8 GHz 0.8–2.0 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 VS = +3 V VS = +5 V 0.5–2.0 GHz 0.5–2.0 GHz Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm VS = +3 V VS = +5 V 0.5–2.0 GHz 0.5–2.0 GHz Control Voltages 1.8:1 1.5:1 dB dB 2.2:1 2.0:1 150 300 70 ns ns mV +15 +21 +21 +27 dBm dBm +36 +37 +44 +45 dBm dBm VLow = 0 to 0.2 V @ 20 µA Max. VHigh = +3 V @ 100 µA Max. to +5 V @ 200 µA Max. VS = VHigh ± 0.2 V 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. Attenuation referenced to insertion loss. 3. Input/output. 4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 9/00A 1 GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz AA264-87 Typical Performance Data (0, +5 V) 0 2.2 30 dB 2.0 16 dB -1.0 1.8 -40˚C -1.5 VSWR Insertion Loss (dB) -0.5 +85˚C -2.0 +25˚C 8 dB 4 dB 2 dB 1.6 1.4 -2.5 -3.0 1.2 -3.5 1.0 Ins. Loss 0 0.5 1.0 1.5 2.0 2.5 3.0 0 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency VSWR vs. Frequency (25˚C) 3.0 2.2 60 30 dB +85˚C 2.0 55 +25˚C 50 16 dB 1.8 -40˚C VSWR IP3 (dBm) 0.5 45 8 dB 4 dB 2 dB 1.6 1.4 40 1.2 35 1.0 Ins. Loss 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 0.5 1.0 1.5 2.0 2.5 Attenuation (dB) Frequency (GHz) IP3 vs. Attenuation and Temperature (500 MHz) VSWR vs. Frequency (85˚C) Compression Point vs. Attenuation, Voltage, and Temperature 2.2 30 dB 2.0 2 dB 5 28.3 28.1 28.1 4 dB 5 35.2 34.7 35.0 8 dB 5 25.8 25.3 25.4 16 dB 5 21.7 21.3 21.6 30 dB 5 24.4 23.2 27.2 16 dB 8 dB 1.8 VSWR Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss 5 29.0 28.9 29.0 4 dB 1.6 2 dB 1.4 1.2 Ins. Loss 1.0 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) VSWR vs. Frequency (-40˚C) 2 3.0 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 9/00A 3.0 GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz 85 30 dB 16 dB 0.5 8 dB 0 -0.5 Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 1.0 4 dB 2 dB -1.0 -1.5 -2.0 -2.5 -3.0 0 1.0 0.5 1.0 1.5 2.0 2.5 65 55 45 30 dB 35 16 dB 25 8 dB 15 4 dB 5 -15 3.0 2 dB 1.0 1.5 2.0 2.5 Attenuation Accuracy vs. Frequency (25˚C) Attenuation Phase Accuracy vs. Frequency (25˚C) 0.5 8 dB 75 4 dB 0 2 dB -1.0 -1.5 -2.0 -2.5 65 55 45 2.5 4 dB 5 -5 2.0 8 dB 15 -15 1.5 16 dB 25 -3.5 1.0 30 dB 35 -3.0 0.5 3.0 85 16 dB 0 0.5 Frequency (GHz) 30 dB -0.5 0 Frequency (GHz) Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 75 -5 -3.5 3.0 2 dB 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (85˚C) Attenuation Phase Accuracy vs. Frequency (85˚C) 3.0 85 0.5 30 dB Deviation from Nominal Insertion Phase (Deg.) 1.0 Deviation from Nominal Attenuation (dB) AA264-87 16 dB 0 8 dB -0.5 2 dB -1.0 4 dB -1.5 -2.0 -2.5 75 65 55 45 35 30 dB 16 dB 25 8 dB 15 4 dB 5 2 dB -5 -3.0 -15 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.5 1.0 1.5 2.0 2.5 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. 9/00A 3.0 3 GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz AA264-87 0 1.0 -0.5 0.5 Deviation from Nominal Attenuation (dB) Insertion Loss (dB) Typical Performance Data (0, +3 V) -1.0 -1.5 -40˚C +85˚C -2.0 +25˚C -2.5 -3.0 0.5 1.0 1.5 2.0 2.5 -1.0 4 dB -1.5 -2.0 30 dB -2.5 -3.0 3.0 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency Attenuation Accuracy vs. Frequency (25˚C) 2.2 2.0 Deviation from Nominal Attenuation (dB) 30 dB 16 dB 8 dB 1.8 VSWR 8 dB 2 dB -4.0 0 4 dB 2 dB 1.6 1.4 1.2 Ins. Loss 1.0 0 0.5 1.0 1.5 2.0 2.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 2 dB 16 dB 4 dB 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) VSWR vs. Frequency (25˚C) Attenuation Accuracy vs. Frequency (85˚C) 1.0 80 0.5 70 60 50 40 30 dB 8 dB 6 dB 20 10 3.0 8 dB Frequency (GHz) 90 30 30 dB 0 3.0 Deviation from Nominal Attenuation (dB) Deviation from Nominal Insertion Phase (dB) -0.5 -3.5 -3.5 3.0 30 dB 0 8 dB -0.5 2 dB 16 dB -1.0 4 dB -1.5 -2.0 -2.5 -3.0 0 2 dB 4 dB -10 0 4 16 dB 0 0.5 1.0 1.5 2.0 2.5 -3.5 3.0 0 0.5 1.0 1.5 2.0 2.5 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. 9/00A 3.0 GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz 57 +25˚C 53 IP3 (dBm) Compression Point vs. Attenuation, Voltage, and Temperature +85˚C 55 51 AA264-87 Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss 3 21.7 21.6 22.6 -40˚C 49 47 2 dB 3 21.2 20.7 21.4 4 dB 3 34.3 31.0 34.3 41 8 dB 3 33.6 23.0 32.9 39 16 dB 3 18.0 17.0 21.4 37 30 dB 3 22.4 21.2 24.1 45 43 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Attenuation (dB) Absolute Maximum Ratings IP3 vs. Attenuation and Temperature (500 MHz) Characteristic Value RF Input Power Truth Table V1 V2 V3 V4 16 dB 8 dB 4 dB 2 dB Attenuation J1–J2 VHigh VHigh VHigh VHigh Reference I.L. VHigh VHigh VHigh 0 2 dB VHigh VHigh 0 VHigh 4 dB VHigh VHigh 8 dB VHigh VHigh VHigh 16 dB 0 0 0 0 30 dB Max. Atten. -0.2 V, +8 V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C Note: Exceeding these parameters may cause irreversible damage. Pin Out GND V1 V2 4 V3 8 dB 5 4 dB 7 GND 8 2 dB CBL J1 GND GND GND GND GND GND VS 9 6 GND 11 10 V4 15 14 13 12 GND 3 16 dB 2 VHigh = +3 to +5 V (VS = VHigh ± 0.2 V). +8 V Control Voltage 16 0 0 Supply Voltage 1 VHigh 1 W > 500 MHz 0/8 V 0.5 W @ 50 MHz 0/8 V 10 kΩ CBL J2 DC blocking capacitors (CBL) and biasing resistor must be supplied externally for positive voltage operation. CBL = 47 pF for operation >500 MHz. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 9/00A 5