GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz AA104-73 Features SOT-6 ■ 1 Bit Attenuation of 32 dB DC–1 GHz, 27 dB 1–2 GHz, 24 dB 2–2.5 dB 0.074 (1.90 mm REF.) 0.126 (3.20 mm) 0.087 (2.20 mm) PIN 6 ■ Combine with AA260-85 or AA101-80 for 63 dB 6 Bit Solution 0.071 (1.80 mm) 0.052 (1.30 mm) PIN 1 INDICATOR PIN 1 ■ Tune with One Capacitor and/or Resistor to Desired Operating Frequency and Attenuation 0.020 (0.51 mm) 0.014 (0.350 mm) 0.057 (1.45 mm) 0.035 (0.90 mm) 0.006 (0.15 mm) 0.000 (0.00 mm) ■ Ideal for Both IF and RF Applications Including Cable, GSM, PCS, EDGE, 3G and ISM 0.037 (0.95 mm) REF. 0.012 (0.30 mm) TYP. 5.0˚ ± 1˚ 0.014 (0.26 mm) 0.004 (0.10 mm) 5.0˚ ± 1˚ Description The AA104-73 is a 1 bit, GaAs IC FET digital attenuator in a low cost SOT-6 package. This attenuator has up to 32 dB total attenuation.The attenuator requires two lines of voltage control. The AA104-73 is particularly suited where high attenuation accuracy, low insertion loss and low 0.122 (3.10 mm) 0.106 (2.70 mm) 0.022 (0.61 mm) 0.004 (0.10 mm) intermodulation products are required. Typical application is as a sixth bit value for the AA260-85 and AA101-80. A total attenuation of 63 dB in 1 dB steps can be obtained by combining the two attenuators. Electrical Specifications at -40 to 85°C (0, +3 V), (0, +5 V) Parameter1 Frequency2 Typ. Max. Unit Insertion Loss DC–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz 0.8 0.9 1.0 1.0 1.2 1.3 dB dB dB Attenuation Range DC–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz 32 27 24 Attenuation Accuracy3, 4 DC–0.5 GHz 0.85–0.95 GHz 1.7–2.0 GHz 2.0–2.5 GHz VSWR (Insertion Loss State)5 VSWR (Attenuation State)5 Parameter Switching Characteristics6 Min. ± ± ± ± (0.4 (0.4 (0.5 (0.6 + + + + dB dB dB 10% of Attenuation Setting in dB) 5% of Attenuation Setting in dB) 6% of Attenuation Setting in dB) 7% of Attenuation Setting in dB) DC–2.5 GHz 1.2:1 1.5:1 DC–2.5 GHz 1.5:1 2.0:1 Condition Frequency Min. Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru Typ. dB dB dB dB Max. Unit 50 100 25 ns ns mV Input Power for 1 dB Compression VS = +3 V VS = +5 V 0.5–2.5 GHz 0.5–2.5 GHz 14 18 +21 +23 dBm dBm Intermodulation Intercept Point (IP3) For Two-tone Input Power +10 dBm VS = +3 V VS = +5 V 0.5–2.5 GHz 0.5–2.5 GHz 36 38 +41 +44 dBm dBm Control Voltages VLow = 0 to 0.2 V @ 20 µA Max. VHigh = +3 V @ 100 µA Max. to +5 V @ 200 µA Max. 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. Operates to DC when controlled with negative voltage, CBP not required. 3. Attenuation value set by CBP. 4. Attenuation referenced to insertion loss. 5. Input/output. In band. 6. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth. 7. DC = 30 KHz. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 5/00A 1 GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz AA104-73 0 -27 -0.25 -28 -0.50 Max Attenuation (dB) Insertion Loss (dB) Typical Performance Data at -40 to 85°C (0, +5 V) CBP = 12 pF, CBL = 47 pF IL 25˚C -0.75 IL -40˚C -1.00 IL 85˚C -1.25 -1.50 0.0 0.5 1.0 1.5 2.0 2.5 -30 32 dB 85˚C -31 32 dB 25˚C -32 -33 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 3.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 32 dB State vs. Frequency 2.0 3.0 S11 -40˚C 1.8 2.5 S11 -40˚C VSWR S22 -40˚C 1.6 VSWR 32 dB -40˚C -29 S11 85˚C 1.4 S11 25˚C S22 25˚C S22 25˚C 1.0 1.5 S22 -40˚C 1.5 1.0 0.5 S11 25˚C 2.0 S22 85˚C S22 85˚C 1.2 0 S11 85˚C 2.0 2.5 1.0 0 3.0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency Insertion Loss State VSWR vs. Frequency 32 dB State Compression Point vs. Voltage and Temperature 3.0 IP3 vs. Voltage and Temperature Control Voltage (V) Temperature (°C) 1 dB Compression Insertion Loss State (dBm) 1 dB Compression 32 dB State (dBm) 3 -40 21 16.5 3 25 21 15.0 3 85 21 14.0 5 -40 22 22.5 5 25 22 22.5 5 85 22 22.5 Control Voltage (V) Temperature (°C) IP3 @ +10 dBm each tone (dBm) 3 -40 41 3 25 42 3 85 40 5 -40 43 5 25 44 5 85 42 Two tone input power: +10 dBm each tone. Tone frequencies: 500 and 501 MHz. Frequency: 500 MHz. 2 2.5 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 5/00A GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz AA104-73 2.0 0 2.2 pF 1.8 -10 2.7 pF 2.2 pF 1.6 VSWR Attenuation (dB) -5 -15 2.7 pF -20 1.4 -25 Ins. Loss 3.3 pF 12 pF 3.3 pF 1.2 -30 12 pF 1.0 -35 0 0.5 1.0 1.5 2.0 2.5 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Frequency (GHz) Attenuation vs. Frequency DC–2.5 GHz CBP = 2.2, 2.7, 3.3 and 12 pF VSWR vs. Frequency DC–2.5 GHz CBP = 2.2, 2.7, 3.3 and 12 pF -15.0 2.0 -17.5 1.8 -20.0 -22.5 2.2 pF VSWR Attenuation (dB) 220 pF 1.6 1.4 1500 pF -25.0 3.3 pF -27.5 1000 pF 2.7 pF 1.2 Ins. Loss -30.0 1.50 1.0 1.75 2.00 2.25 0 2.50 0.1 0.2 0.3 0.4 0.5 Frequency (GHz) Frequency (GHz) Attenuation vs. Frequency 1.5–2.5 GHz CBP = 2.2, 2.7, and 3.3 pF VSWR vs. Frequency DC–0.5 GHz CBP = 220, 1000, 1500 pF -20 220 pF Attenuation (dB) -24 1000 pF -28 -32 1500 pF -36 -40 0 0.1 0.2 0.3 0.4 CBL (pF) CBP (pF) Operating Frequency (GHz) 47 2.2 2.00–2.30 47 2.7 1.80–2.00 47 3.3 1.60–1.80 47 12 0.90–1.05 47 15 0.80–0.90 330 220 0.20–0.35 1500 1000 0.07–0.20 10000 1500 0.015–0.25 0.5 Frequency (GHz) Attenuation vs. Frequency DC–0.5 GHz CBP = 220, 1000, 1500 pF Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 5/00A 3 GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz Pin Out AA104-73 Absolute Maximum Ratings Positive Voltage Characteristic Value RF Input Power V2 6 1 J1 CBL 5 2 32 NC/GND CBP 4 J2 3 RF GND V1 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. CBL CBL = 47 pF for frequencies >500 MHz. See Table on previous page for CBP value. See application notes APN2013 and APN2014 for 6 bit attenuator requirements. Truth Table Positive Control V2 Attenuation J1–J2 VHigh 0 Reference I.L. 0 VHigh 32 dB V1 VHigh = +3 to +5 V. Application: AA104-73 used as 1 Bit 20 dB Attenuator 25°C (0, +5 V) 2.50 6 V2 5 1 J1 NC/GND CBL 2.25 2 20 CBP RBP 4 VSWR 2.00 3 RF GND J2 V1 CBL CBL = 220 pF, CBP = 100 pF, RBP = 15 Ω, fC = 400 MHz with select values of CBP and RBP, center frequency and attenuation value respectively can be varied. 1.75 1.50 S22 25˚C 1.25 1.00 -15 0 -16 Max Attenuation (dB) S11 25˚C 0.2 0.4 0.6 0.8 Frequency (GHz) -17 VSWR vs. Frequency 20 dB State -18 -19 -20 -21 -22 20 dB 25˚C -23 -24 -25 0 0.2 0.4 0.6 0.8 1.0 Frequency (GHz) 20 dB State vs. Frequency CBP = 100 pF, CBL = 220 pF, RBP = 15 Ω 4 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 5/00A 1.0