Attenuator 5 to 2500 MHz Technical Data UTF-025 Features Description Pin Configuration • 35 dB Attenuation Range The UTF-025 is a thin-film voltagecontrolled RF attenuator that operates from 5 to 2500 MHz. Utilizing PIN diodes, attenuation over frequency typically has ±0.4 to ±0.6 dB flatness over the complete control voltage range. On the average, the attenuation will change roughly 5 dB per 2volt increment. The UTF-025 is available in either the TO-8 hermetic case or connectorized TC-1 package. TO-8F • < 1.5:1 VSWR Applications • Open and Closed Loop Gain Control • AGC Circuits Schematic RFIN GROUND RF IN RF OUT V+ CONTROL TC-1 RF IN RF OUT V+ Maximum Ratings RFOUT Parameter DC Voltage Continuous RF Input Power Operating Case Temperature Storage Temperature “R” Series Burn-In Temperature Weight: (typical) 2.1 grams Maximum +18 Volts +23.0 dBm –55 to +125°C –62 to +150°C +125°C 2 Electrical Specifications (Measured in 50 Ω system @ +15 VDC nominal) Symbol BW — — — — — — — — — — Characteristic Typical Guaranteed Specifications TC = 25°C TC = 0 to 50°C TC = –55 to +85°C Frequency Range 5-2500 Attenuation, Min. (VC = 0 V) 5-500 MHz 33.0 500-1000 MHz 28.0 1000-2000 MHz 23.0 2000-2500 MHz 17.0 Insertion Loss, Max. (VC = +15 V) 5-1000 MHz 2.0 1000-2000 MHz 2.8 2000-2500 MHz 3.5 VSWR (Worst Case In Attenuation Range) 5-1000 MHz 1.5:1 1000-2000 MHz 1.8:1 Intercept Point +30 Flatness Over Frequency (Min. to 15 dB) 5-1000 MHz ± 0.4 1000-2000 MHz ± 0.6 (Min. to 20 dB) 5-1000 MHz ± 0.8 Switching Speed (10% to 90%) 75 (ON to OFF or OFF to ON) Bias Voltage +15 Bias Current 15 Control Voltage 1 to +15 Control Current 0 to 7 Unit 5-2000 5-2000 MHz — — — — — — — — dB dB dB dB — — — — — — dB dB dB — — — — — — — — dBm — — — — dB dB — — — — dB µs — — — — — — — — VDC mA VDC mA 3 Typical Performance At 25°C Temperature (at +15 VDC unless otherwise noted) Phase 2.5 0V 2.6V 3.0V 3.5V 50 5V 30 20 7V 15V 10 8 2.0 VSWR 100 Control Voltage 1.5 5 15V 0V 2.6V 3 2 1 0 500 1000 1500 Frequency, MHz 2000 1.0 2500 0 500 1000 Output VSWR 3.5V 2.6V 1.5 5V 7V 0V 15V 0 500 1000 1500 2000 Attenuation, dB VSWR 2.0 1.0 15V 7V 5V 3.5V 2.6V 0V 10 20 30 40 50 2500 0 500 1000 Frequency, MHz 0 Attenuation, dB 10 20 30 4 6 8 10 12 Control Voltage, Volts 14 0 2500 2 4 6 8 12 16 Ic 10 Vc 20 30 16 0 4 8 Control Voltage, Volts Due to RS vs. IF differences in pin diodes used in this product, internal drive compensation is done to optimize VSWR. This correction can affect the Attenuation vs. Control Voltage from unit to unit to the extent shown in the graph. Switching Time Control Pulse 0 to –10V Output Power and Loss (Input Signal 0 dBm) Output Power, mW 2 2000 Attenuation Control Current, mA 0 0 1500 Frequency, MHz Variations of Attenuation From Unit-to-Unit at Various Control Voltages at 1000 MHz 2 0.6 fIN = 5 MHz 0.4 4 0.2 7 0 ON 4 8 12 Control Voltage, Volts 20 16 Distortion Products (Input Signal 0 dBm) f = 1000 MHz –40 50 Microseconds per Division OFF Power Output, mW Attenuation, dB Control Voltage Attenuation 0 Control Voltage Detected RF 2000 Frequency, MHz 2.5 40 1500 5V 3V 3.5V 2500 Loss, dB Phase, Degrees Input VSWR Control Voltage 200 –50 2nd Harmonic 3rd Order IMD (2 tone) –70 –80 –90 Sweep Time, microseconds fIN = 5 MHz –60 3rd Harmonic 0 10 20 Attenuation Setting, dB 30 4 Product Options UTF – 025 R Model Number Prefix UTFPPF- Model Number Screening Option blank = No Screening required R = R-Series Screening For more information on R-Series screening, see Reliability Screening, Pub. 5963-3240E. UTFC – 025 – 1 Model Number Prefix UTFC- Model Number Connector Option For TC-1 case, the only connector option available is the -1. The -1 option consists of an SMA Female connector on both the input and output (see note). Note: No R-Series screening is available in the TC-1 case as the case is non-hermetic. 5 Case Drawings TC-1 .820 1.000 RFOUT RF IN V+ .460 .890 PRODUCT MARKING AREA AGC (IF REQUIRED) .38 (2) PL .460 DC INPUT .500 .350 .310 .890 .350 SMA JACK (FEMALE) (2) PL .310 .19 .100 GND .24 .640 .180 .905 2-56 UNC-2B x .15 DEEP THREADED INSERT (4) PL .250 .095 .570 TYPICAL WEIGHT WITH CONNECTORS = 21.5 GRAMS NOTES: 1. THE TC-1 CASE IS A NON-HERMETIC CASE. 2. THE ONLY CONNECTOR OPTION AVAILABLE FOR THE TC-1 CASE IS THE –1, SMA FEMALE CONNECTORS AT BOTH INPUT AND OUTPUT PORTS. NOTES (UNLESS OTHERWISE SPECIFIED): 1. DIMENSIONS ARE SPECIFIED IN INCHES 2. TOLERANCES: xx ± .02 xxx ± .010 Case Drawings TO-8F .300 TYP .175 .017 +.002 - 001 .150 TYP GROUND RF OUT 3 4 .150 TYP 1 45 .031 .031 GLASS RING .060 DIA TYP (4X) 2 .50 .450 DIA DIA MAX 0.185 ±0.015 RF IN 5 CASE GROUND CONTROL V+ .075 APPROXIMATE WEIGHT 2.1 GRAMS NOTES (UNLESS OTHERWISE SPECIFIED): 1. DIMENSIONS ARE SPECIFIED IN INCHES 2. TOLERANCES: xx ± .02 xxx ± .010 Contact Teledyne Microwave Solutions: 650-691-9800 650-962-6845 fax Check for updates: www.teledynemicrowave.com