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| Preliminary GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver 0.5-2.5 GHz AA109-310 Features I Positive Voltage Operation (+5 V) I MLF 5 x 5 mm Leadless Package I Integrated Silicon Serial-to-Parallel Driver I Attenuation 1 dB Steps to 31 dB MLF 5 x 5 (-310) 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 1 0.187 (4.75 mm) BSC 0.197 (5.00 mm) BSC 12 MAX. 0.122 (3.10 mm) 0.006 (0.15 mm) 32 1 SEATING PLANE Description 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) 0.138 (3.50 mm) REF. 0.019 (0.50 mm) BSC 0.138 (3.50 mm) REF. Electrical Specifications at 25C (VCC = +5 V) Parameter1 Insertion Loss2 Condition Frequency 0.5-1.0 GHz 1.0-2.0 GHz 2.0-2.5 GHz 0.5-1.0 GHz 1.0-2.0 GHz 2.0-2.5 GHz VSWR (I/O) Switching Characteristics5 Rise, Fall (10/90% or 90/10% RF) On, Off (50% CTL to 90/10% RF) Video Feedthru VS = +3 V VS = +5 V For Two-tone Input Power +5 dBm VS = +3 V VS = +5 V 0.9-2.5 GHz 0.9-2.5 GHz 0.9-2.5 GHz 0.9-2.5 GHz 0.5-2.5 GHz Min. Typ. 2.0 2.7 3.1 15.5 (0.2 + 3% of Attenuation Setting in dB) (0.3 + 5% of Attenuation Setting in dB) (0.3 + 6% of Attenuation Setting in dB) 1.5:1 100 300 70 +21 +27 +41 +45 2.2:1 s s mV dBm dBm dBm dBm Max. 2.4 3.1 3.6 Unit dB dB dB dB dB dB dB Attenuation Range3, 4 Attenuation Accuracy3, 4 Input Power for 1 dB Compression Intermodulation Intercept Point (IP3) DC Electrical Characteristics at 25C (0, +5 V) Parameter Input Voltage High Input Voltage Low Input Leakage Current Quiescent Current Supply Voltages 1. All measurements made in a 50 system, unless otherwise specified. 2. Insertion loss changes by 0.003 dB/C. 3. Attenuation value referenced above insertion loss. Symbol VIH (1) VIL (0) IL ICC VCC Min. 0 Typ. 3.5 0.5 0.5 500 5.0 Max. 5.0 Unit V V A A V 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 sales@alphaind.com * 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 Typical Performance Data (VCC = +5 V) 0 -0.5 2.2 16 dB 2.0 8 dB 1.8 31 dB Insertion Loss (dB) -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 0 0.5 1.0 1.5 2.0 2.5 VSWR 1.6 1.4 1.2 1.0 0 2 dB 1 dB Ins. Loss 0.5 1.0 1.5 2.0 2.5 4 dB Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 1.0 0.8 VSWR vs. Frequency Absolute Maximum Ratings 31 dB 8 dB 16 dB Characteristic Supply Voltage (VCC) Input Voltage (VI) Power Dissipation (PD) 1 dB 4 dB 2 dB Storage Temperature (TST) Operating Temperature (TOP) Value -0.5 to +6 V -0.5 - VCC + 0.5 V 500 mW -65C to +125C -40C to +85C Deviation from Nominal Attenuation (dB) 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 0 0.5 Truth Table 1.0 1.5 2.0 2.5 Reset 1 1 1 1 1 0.013 (0.33 mm) 0.020 (0.50 mm) Serial Data Input 1 dB 1 0 1 1 1 1 0 X 2 dB 1 1 0 1 1 1 0 X 4 dB 1 1 1 0 1 1 0 X 8 dB 1 1 1 1 0 1 0 X 16 dB 1 1 1 1 1 0 0 X Frequency (GHz) J1-J2 Attenuation Insertion Loss 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB 31 dB Attenuation Accuracy vs. Frequency Surface Mount Land Pattern 5 x 5 mm MLF 32 Lead 0.020 (0.50 mm) 1 1 0 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 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * 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 AA109-310 Pin Out 0.01 F Pin 1-4 5 6-19 20 21-25 GND GND GND GND J2 GND GND GND GND GND GND GND GND GND GND GND Vcc 10 k 47 pF Symbol GND J1 GND J2 GND VCC SCK SDA LE RST GND SOut Function Ground RF Input/Output Ground RF Input/Output Ground Supply Voltage Serial Clock Input Serial Data Input Latch Enable Reset Ground Serial Data Output 47 pF Pin 32 Pin 1 GND GND GND GND J1 GND GND GND SOut GND RST LE SDA SCK VCC GND 26 27 28 29 30 31 32 Timing Diagram LE SCK SDA T1 T2 T3 T5 T4 Parameter LE Setup Time SDA Setup Time SDA Hold Time LE Hold Time Clock Period Symbol T1 T2 T3 T4 T5 Min. Typ. 15 15 10 10 60 Max. Unit ns ns ns ns ns Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/01A 3 |
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