GaAs Digital Attenuator, 31 dB, 5 Bit DC - 2 GHz AT-357 ● Attenuation 1 dB Steps to 31 dB TTL Control Interface Hermetic Connectorized Housing 1 Guaranteed Specifications p (-55°C to +85°C) ) ( Frequency Range DC to 2.0 GHz Nominal Attenuation 2 1 dB Steps to 31 dB Attenuation Accuracy DC – 1.0 GHz 1.0 – 2.0 GHz ±(0.2 dB + 2% of Attenuation Setting in dB) dB ±(0.2 dB + 2% of Attenuation Setting in dB) dB VSWR DC – .025 GHz .025 – 0.5 GHz 0.2 – 2.0 GHz 0.5 – 1.0 GHz Reference Insertion Loss 0.000 0.250 (6.35) 0.660 (16.76) 0.20 (5.1) Typ 1.235 ± .005 (31.37 ± 0.13) 0.230 (5.84) 0.115 (2.92) 0.000 0.090 (2.29) 10 Places .025 ±.005 Dia Pin (0.64 ± 0.13) 0.900 Ref. 11 Places (22.86) 0.250 (6.35) 5.5 dB Max 6.0 dB Max 6.5 dB Max Bottom of case is AC ground. Dimensions in ( ) are in mm. Unless Otherwise Noted: .xxx = ± 0.010 (.xx = ± 0.25) .xx = ± 0.02 (.x = ± 0.5) Operating p gCharacteristics Impedance 0.000 0.205 (5.21) Removable SMA Jack Receptacle 2 Places 0.330 (8.38) 2.2:1 Max 1.8:1 Max 1.5:1 Max 1.4:1 Max DC – 0.5 GHz 0.5 – 1.0 GHz 1.0 – 2.0 GHz .093±.005 Dia Thru (2.36 ± 0.13) 4 Places 1.375 (34.92) ● C-46 0.000 0.070 (1.78) Features ● 0.000 0.115 (2.92) 0.23 Ref (5.8) V3.00 50 Ohms Nominal Switching Characteristics Ton, (50% CTL to 90% RF) Toff (50% CTL to 10% RF) Trise, (10% RF to 90% RF) Tfall (90% RF to 10% RF) Switching Transients (unfiltered) 160 ns Typ 80 ns Typ 15 ns Typ 3 ns Typ 130 mV Typ Input Power for 1 dB Compression 0.5 – 2.0 GHz 0.05 GHz 28 dBm Typ 15 dBm Typ Functional Schematic (Top View) 1 dB 4 dB 2 dB 8 dB 16dB RF2 RF1 Intermodulation Intercept Point (for two-tone input power up to +5 dBm) Intercept Points IP2 IP3 0.5 – 2.0 GHz +55 +47 dBm Typ 0.05 GHz +45 +28 dBm Typ Bias Power +15 VDC @ 5 mA Max -12 VDC @ 3 mA Max Control Vin Low (0) Vin High (1) 5 line, TTL Data Bus 0.0 to 0.8V @ 1 µA Max 2.4 to 5.0V @ 1 µA Max 1. All specifications apply when operated with bias voltages of +15 VDC and -12VDC and a 50 ohm impedance at both RF ports. 2. Above reference insertion loss. 3. Contact the factory for standard or custom screening requirements. Ordering Information Model No. Package AT-357 SMA Connectorized +15V C1 GND GND GND GND -12V C2 C3 C4 C5 Truth Table Control Input C1 0 1 0 0 0 0 Attenuator Setting C2 C3 C4 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 Any Combination "1" = Logic High (TTL) C5 0 0 0 0 0 1 REFERENCE 1 dB 2 dB 4 dB 8 dB 16 dB Sum of Bits Selected "0" = Logic Low (TTL) Specifications Subject to Change Without Notice. M/A-COM, Inc. North America: 1 Tel. (800) 366-2266 Fax (800) 618-8883 ■ Asia/Pacific: Tel. +81 (03) 3226-1671 Fax +81 (03) 3226-1451 ■ Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020 AT-357 GaAs Digital Attenuator, 31dB, 5 Bit V3.00 Absolute Maximum Ratings 1 Absolute Maximum1 Parameter Max. Input Power 0.05 GHz 0.5 – 2.0 GHz +27 dBm +32 dBm Bias Voltage +15V Supply (V+) -12V Supply (V-) Control Voltage -0.7V to + 18V -15V to + 0.7V (V-)-2V to (V+)+2V (or 30 mA, whichever comes first) Operating Temperature -55°C to +125°C Storage Temperature -65°C to +150°C Note: 1. Operation of this device above any one of these parameters may cause permanent damage. Typical Performance REFERENCE INSERTION LOSS vs. FREQUENCY 1.0 31 dB 2.0 0.5 LOSS (dB) DEVIATION FROM NOMINAL ATTENUATION (dB) ATTENUATION FLATNESS vs. FREQUENCY 1.0 0.0 1,2,4,8,16 dB -0.5 3.0 4.0 5.0 -1.0 0 0.5 1.0 FREQUENCY (GHz) 6.0 1.5 2.0 0 0.5 1.0 FREQUENCY (GHz) 1.5 2.0 VSWR vs. FREQUENCY 2.0 1.8 VSWR Insertion Loss and 1 dB Bit 1.6 Attenuation of 2 dB and Greater 1.4 1.2 1.0 0 0.5 1.0 1.5 FREQUENCY (GHz) 2.0 Specifications Subject to Change Without Notice. M/A-COM, Inc. 2 North America: Tel. (800) 366-2266 Fax (800) 618-8883 ■ Asia/Pacific: Tel. +81 (03) 3226-1671 Fax +81 (03) 3226-1451 ■ Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020