GaAs IC 4 Bit Digital Attenuator 1 dB LSB Positive Control 0.5–2.5 GHz AA226-87 Features TSSOP-16 ■ Attenuation 1 dB Steps to 15 dB with High Accuracy PIN 16 0.173 (4.40 mm) ± 0.004 (0.10 mm) ■ Single Positive Control (+3 to +5 V) for Each Bit PIN 1 INDICATOR 0.197 (5.00 mm) ± 0.004 (0.10 mm) PIN 1 ■ Low DC Power Consumption ■ Small Low Cost TSSOP-16 Plastic Package 0.0256 (0.65 mm) BSC Description 0.047 (1.20 mm) MAX. 0.009 (0.22 mm) REF. The AA226-87 is a 4 bit, single positive control GaAs IC FET digital attenuator. It requires DC blocking capacitors, positive supply voltage (VS) and four individual positive bit control voltages (V1–V4). The AA226-87 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. 0.252 (6.4 mm) BSC 0.035 (0.90 mm) + 0.006 (0.15 mm) / -0.004 (-0.10 mm) R 0.004 (0.09 mm) MIN. 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 1.0–2.0 GHz 2.0–2.5 GHz Frequency Min. 1.3 1.7 2.3 1.7 2.2 2.6 dB dB dB 0.5–1.0 GHz ± (0.2 + 3% of Attenuation Setting in dB) ± (0.3 + 4% of Attenuation Setting in dB) Attenuation Range 15 Attenuation Accuracy2 1.0–2.5 GHz VSWR (I/O)3 0.5–2.5 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 0.5–2.5 GHz 0.5–2.5 GHz Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm VS = +3 V VS = +5 V 0.5–2.5 GHz 0.5–2.5 GHz Control Voltages 1.5:1 dB dB dB 2.0:1 150 300 70 ns ns mV +20 +24 +25 +30 dBm dBm +43 +44 +49 +50 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 1 dB LSB Positive Control 0.5–2.5 GHz AA226-87 Typical Performance Data (0, +5 V) 0 2.50 15 dB 2.25 8 dB -1.0 2.00 -1.5 -40˚C +25˚C -2.0 VSWR Insertion Loss (dB) -0.5 +85˚C 2 dB 1.50 -2.5 -3.0 1.25 -3.5 1.00 0 0.5 1.0 1.5 4 dB 1.75 2.0 2.5 Ins. Loss 0 3.0 1 dB 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency VSWR vs. Frequency (25˚C) 3.0 2.50 60 8 dB 58 56 +85˚C 15 dB 2.00 54 VSWR IP3 (dBm) 2.25 +25˚C 52 -40˚C 50 4 dB 1.75 2 dB 1 dB 1.50 48 1.25 46 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1.0 1.5 2.0 2.5 Frequency (GHz) IP3 vs. Attenuation and Temperature (500 MHz) VSWR vs. Frequency (85˚C) 15 dB 2.25 31.5 31.2 2 dB 5 31.4 31.1 30.9 4 dB 5 32.7 31.5 34.8 8 dB 5 33.0 32.8 33.5 15 dB 5 30.7 28.5 31.7 8 dB 2.00 VSWR 31.9 4 dB 1.75 2 dB 1.50 1 dB 1.25 Ins. Loss 1.00 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) VSWR vs. Frequency (-40˚C) 2 3.0 2.50 Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss 5 31.6 31.0 30.8 5 0.5 Attenuation (dB) Compression Point vs. Attenuation, Voltage, and Temperature 1 dB Ins. Loss 1.00 44 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 1 dB LSB Positive Control 0.5–2.5 GHz 30 15 dB 0.75 Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 1.00 8 dB 0.50 0.25 4 dB 0 -0.25 2 dB -0.50 1 dB -0.75 -1.00 0.5 1.0 1.5 2.0 2.5 8 dB 20 15 10 5 0 1 dB -5 3.0 2 dB 4 dB 0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (25˚C) Attenuation Phase Accuracy vs. Frequency (25˚C) 30 1.00 15 dB 0.75 Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) 15 dB 25 -10 0 8 dB 0.50 4 dB 0.25 2 dB 1 dB 0 -0.25 -0.50 -0.75 15 dB 25 8 dB 20 15 10 4 dB 2 dB 1 dB 5 0 -5 -10 -1.00 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency (85˚C) Attenuation Phase Accuracy vs. Frequency (85˚C) 30 1.00 15 dB 0.75 Deviation from Nominal Insertion Phase (Deg.) Deviation from Nominal Attenuation (dB) AA226-87 8 dB 0.50 4 dB 0.25 2 dB 1 dB 0 -0.25 -0.50 -0.75 15 dB 25 8 dB 20 15 10 1 dB 4 dB 5 2 dB 0 -5 -10 -1.00 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 1 dB LSB Positive Control 0.5–2.5 GHz AA226-87 0 1.00 -0.5 0.75 Deviation from Nominal Attenuation (dB) Insertion Loss (dB) Typical Performance Data (0, +3 V) -1.0 -40˚C -1.5 +25˚C -2.0 -2.5 +85˚C -3.0 -3.5 0.5 1.0 1.5 2.0 2.5 2 dB 1 dB 0 -0.25 -0.50 -0.75 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) 3.0 1.00 Deviation from Nominal Attenuation (dB) 15 dB 2.25 8 dB 2.00 VSWR 4 dB 0.25 3.0 2.50 4 dB 1.75 2 dB 1 dB 1.50 1.25 0 0.5 1.0 15 dB 0.75 8 dB 0.50 4 dB 0.25 2 dB 1 dB 0 -0.25 -0.50 -0.75 -1.00 Ins. Loss 1.00 1.5 2.0 2.5 -1.25 3.0 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency (25˚C) Attenuation Accuracy vs. Frequency (85˚C) 3.0 1.00 30 15 dB 25 Deviation from Nominal Attenuation (dB) Deviation from Nominal Phase (Deg.) 8 dB 0.50 -1.00 0 8 dB 20 15 10 4 dB 5 0 1 dB 2 dB -5 15 dB 0.75 8 dB 0.50 4 dB 0.25 2 dB 1 dB 0 -0.25 -0.50 -0.75 -1.00 -10 0 4 15 dB 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 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 1 dB LSB Positive Control 0.5–2.5 GHz Compression Point vs. Attenuation, Voltage, and Temperature 56 55 54 IP3 (dBm) AA226-87 +85˚C Input Power @ 1 dB Compression Attenuation Control State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm) Ins. Loss 3 24.5 24.1 24.6 53 52 +25˚C 51 1 dB 3 25.2 24.8 25.2 2 dB 3 25.0 24.3 24.9 4 dB 3 31.2 30.4 32.8 47 8 dB 3 28.3 26.3 29.2 46 15 dB 3 26.6 24.8 27.5 50 49 -40˚C 48 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Attenuation (dB) Pin Out IP3 vs. Attenuation and Temperature (500 MHz) J1 CBL VHigh VHigh 0 VHigh 2 dB VHigh 0 VHigh VHigh 4 dB 0 VHigh VHigh VHigh 8 dB 0 0 0 0 15 dB Max. Atten. V4 GND GND 2 dB 1 dB GND GND GND GND GND VS 9 1 dB GND 11 10 Reference I.L. 0 15 14 13 12 VHigh VHigh 8 VHigh VHigh V3 7 VHigh VHigh 4 dB 6 VHigh V2 5 Attenuation J1–J2 16 V4 1 dB V1 4 V3 2 dB 8 dB 3 V2 4 dB GND 2 V1 8 dB GND 1 Truth Table 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. VHigh = +3 to +5 V (VS = VHigh ± 0.2 V). Absolute Maximum Ratings Characteristic RF Input Power Value 1 W > 500 MHz 0/8 V 0.5 W @ 50 MHz 0/8 V Supply Voltage +8 V Control Voltage -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. 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