Preliminary GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver 0.5–2.5 GHz AA109-310 Features MLF 5 x 5 (-310) ■ Positive Voltage Operation (+5 V) 0.197 (5.00 mm) BSC 0.039 (1.00 mm) MAX. PIN 1 0.187 0.001 INDICATOR (4.75 mm) BSC (0.025 mm) 32 ■ MLF 5 x 5 mm Leadless Package ■ Integrated Silicon Serial-to-Parallel Driver ■ Attenuation 1 dB Steps to 31 dB 1 0.197 (5.00 mm) BSC 0.187 (4.75 mm) BSC SEATING PLANE Description 12˚ MAX. The AA109-310 is a GaAs FET IC 5 bit digital attenuator with a serial-to-parallel driver packaged in a 32 leadless exposed pad plastic package. It is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required.Typical applications include base station, wireless and wireless local loop gain control circuits. 0.122 (3.10 mm) ± 0.006 (0.15 mm) 32 1 0.122 (3.10 mm) ± 0.006 (0.15 mm) 0.138 (3.50 mm) REF. 0.019 (0.50 mm) BSC 0.138 (3.50 mm) REF. Electrical Specifications at 25°C (VCC = +5 V) Parameter1 Condition Insertion Loss2 Frequency Min. 0.5–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz Attenuation Range3, 4 Typ. Max. Unit 2.0 2.7 3.1 2.4 3.1 3.6 dB dB dB 15.5 Attenuation Accuracy3, 4 0.5–1.0 GHz 1.0–2.0 GHz 2.0–2.5 GHz VSWR (I/O) 0.5–2.5 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 VS = +3 V VS = +5 V Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm VS = +3 V VS = +5 V dB ± (0.2 + 3% of Attenuation Setting in dB) ± (0.3 + 5% of Attenuation Setting in dB) ± (0.3 + 6% of Attenuation Setting in dB) 1.5:1 dB dB dB 2.2:1 100 300 70 µs µs mV 0.9–2.5 GHz 0.9–2.5 GHz +21 +27 dBm dBm 0.9–2.5 GHz 0.9–2.5 GHz +41 +45 dBm dBm DC Electrical Characteristics at 25°C (0, +5 V) Parameter Symbol Input Voltage High VIH (1) Input Voltage Low VIL (0) Supply Voltages 1. All measurements made in a 50 Ω system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/°C. 3. Attenuation value referenced above insertion loss. 0 Typ. Max. 3.5 5.0 0.5 Unit V V IL ±0.5 µA ICC 500 µA VCC 5.0 V Input Leakage Current Quiescent Current Min. 4. Exposed pad must be connected to RF ground to obtain specified attenuation. 5. 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. 3/01A 1 GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver 0.5–2.5 GHz AA109-310 0 2.2 -0.5 2.0 16 dB 8 dB -1.0 -1.5 -2.0 1.6 1.4 -2.5 4 dB 2 dB 1 dB Ins. Loss 1.2 -3.0 1.0 -3.5 0 0.5 1.0 1.5 2.0 2.5 0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency VSWR vs. Frequency 0.8 31 dB 0.6 Characteristic Value Supply Voltage (VCC) 8 dB 0.4 16 dB -0.5 to +6 V Input Voltage (VI) 0.2 -0.5 – VCC + 0.5 V Power Dissipation (PD) 0 -0.2 1 dB -0.4 -0.6 2 dB 500 mW Storage Temperature (TST) -65°C to +125°C Operating Temperature (TOP) -40°C to +85°C 4 dB -0.8 Truth Table -1.0 0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Attenuation Accuracy vs. Frequency Surface Mount Land Pattern 5 x 5 mm MLF 32 Lead 0.020 (0.50 mm) 0.013 (0.33 mm) 0.020 (0.50 mm) Serial Data Input Reset 1 dB 2 dB 4 dB 8 dB 16 dB J1–J2 Attenuation 1 1 1 1 1 1 Insertion Loss 1 0 1 1 1 1 1 dB 1 1 0 1 1 1 2 dB 1 1 1 0 1 1 4 dB 1 1 1 1 0 1 8 dB 1 1 1 1 1 0 16 dB 1 0 0 0 0 0 31 dB 0 X X X X X 31 dB VIL (0) = 0 to 0.5 V. VIH (1) = 3.5 to 5 V. X = Don’t Care. 0.122 (3.10 mm) SQ. 0.020 (0.50 mm) 0.020 (0.50 mm) Dimensions in inches (mm). 2 2.5 Absolute Maximum Ratings 1.0 Deviation from Nominal Attenuation (dB) 31 dB 1.8 VSWR Insertion Loss (dB) Typical Performance Data (VCC = +5 V) Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/01A GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver DC–2.5 GHz SOut GND RST LE SDA SCK VCC GND 0.01 µF Pin Out Pin 32 Pin 1 GND GND GND GND J1 GND GND GND Vcc 10 kΩ 47 pF GND GND GND GND GND GND GND GND 47 pF GND GND GND GND J2 GND GND GND AA109-310 Pin Symbol 1–4 GND Function Ground 5 J1 RF Input/Output 6–19 GND Ground RF Input/Output 20 J2 21–25 GND Ground 26 VCC Supply Voltage 27 SCK Serial Clock Input 28 SDA Serial Data Input 29 LE Latch Enable 30 RST Reset 31 GND Ground 32 SOut Serial Data Output Timing Diagram LE SCK SDA T1 T2 Parameter T3 T5 T4 Symbol Min. Typ. Max. Unit LE Setup Time T1 15 ns SDA Setup Time T2 15 ns SDA Hold Time T3 10 ns LE Hold Time T4 10 ns Clock Period T5 60 ns Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 3/01A 3