Programmable Attenuators Model 3456 Programmable Attenuator dc to 3.0 GHz 1 Watt 75 Ω with optional TTL Interface INCREMENTAL ATTENUATION ACCURACY: Attenuation Range (dB) 1 - 31 32 - 63 Accuracy +0.5 dB or 3% whichever is greater 4% MAXIMUM INSERTION LOSS (dB): Frequency Range (GHz) Features o Higher Frequency range to 3 GHz. o Cost Effective design for Wireless/Cable Applications. o Custom Configurations including bus controlled attenuator subsystems. Description The 3456 Series 75 Ω Programmable Step Attenuators are designed for use in automatic test equipment and OEM systems operating in the dc to 3 GHz frequency range. Custom designed configurations are available upon request. Each cell contains a double-pole, double-throw relay that provides a zero path or attenuated path for the RF signal. Microstrip circuitry and special compensation techniques produce flat attenuation versus frequency characteristics. The microstrip construction, using thin-film circuit elements, ensures product uniformity. To minimize RF leakage, the 3400 Series Attenuators are provided with gold-plated contact areas and feedthrough filters at each control terminal. Specifications NOMINAL IMPEDANCE: 75 Ω FREQUENCY RANGE: dc to 3.0 GHz MAXIMUM SWR: Frequency Range (GHz) dc - 2.15 2.15 - 3 SWR 1.45 1.50 3456-63 NO. Attenuation Cells Range/Steps (dB) 6 63/1 dc - 2.15 2.15 - 3 2.10 3.30 MONOTONICITY: dc to 3.0 GHz POWER RATING: 1 watt average to 25°C ambient temperature, derated linearly to 0.25 watt @ 70°C. 50 watts peak (5 μsec pulse width; 1% duty cycle) POWER COEFFICIENT: <0.005 dB/dB/watt RATED SWITCH LIFE: 300,000 cycles minimum per cell @ 30 dBm SWITCHING TIME: 10 msec maximum at nominal rated voltage RELEASE TIME: 6 msec maximum CYCLING RATE: 5 Hz maximum per relay OPERATING VOLTAGE: +12 Vdc (+13 V maximum; +9 V minimum) OPERATING CURRENT: 40 mA typical per cell @ +12 V TEMPERATURE RANGE (Operating): -30°C to +70°C TEST DATA: Test data is available at additional cost. CONNECTORS: Type F female connectors per MIL-STD348 interface dimensions - mate nondestructively with MIL-C-39012 connectors. CONTROL TERMINALS: 0.040 inch (1 mm) diameter solderable leads. CONSTRUCTION: Housing: Aluminum Connectors: Brass body with Nickel plating and brass contact with gold plating. Control terminals: Brass/Copper, Silver plated WEIGHT (Typical): 99 g (3.5 oz) CONTROL CONFIGURATION: CELL CONFIGURATIONS: Model Number Loss (dB) Cell Increments (dB) 1, 2, 4, 8, 16, 32 Standard Unit: One terminal is connected to case ground and the remaining terminals are provided for activation of individual cells. Attenuation is fail-safe to "0" setting in the absence of a control voltage. Application of a voltage (+) to a particular cell causes it to switch to the attenuate position. 1 5305 Spectrum Drive, Frederick, MD 21703-7362 s TEL: 301-846-9222, 800-638-2048 s Fax: 301-846-9116 web: www.aeroflex.com/weinschel s email: [email protected] Revision Date: 2/4/2015 Programmable Attenuators Units with TTL Option: Units with this options are supplied with a very low profile connectorized TTL interface board mounted directly to the control terminals. This TTL interface option is available with a 10 pin ribbon cable connector and is supplied with a mating connector. Refer to Physical Dimensions for mating connector pin/wiring details. Two wires are specified for supply voltage and ground. The remaining wires will accept TTL control signals to activate or de-activate a particular attenuation cell. A TTL high will energize a cell to the high attenuation state, whereas a TTL low will maintain a cell in its zero attenuation state. To order 3400 Series Attenuators with this option add -1 to basic model number for ribbon cable connector. Example: Model 3406-63 with a TTL interface would be 3406-63-1. Note: Control is non-latching and requires a continuous control signal for the period of time in which attenuation is required. TTL DRIVER SPECIFICATIONS: INPUT VOLTAGE: VIN High= +2.0V minimum +5.0V typical Vcc maximum VIN Low = 0 minimum 0.8 maximum INPUT CURRENT: IIN (VIN=2.4 V) = 55 μA IIN (VIN=3.85 V) = 280 μA SUPPLY CURRENT (Digital Section): maximum ICC=25.0 mA SUPPLY CURRENT (per cell continuos): 30 mA per cell SUPPLY VOLTAGE: VCC = +12.0 to +15V TEMPERATURE RANGE (Operating): -40°C to +70°C PHYSICAL DIMENSIONS: 15.9 [.63] 155.2 [6.11] 2X 4-40 UNC - 2B BOTH SIDES 123.4 [4.86] 5.7 [.23] 15.5 [.61] 5.08[.20] DEEP CONNECTOR, TYPE F FEMALE, BOTH ENDS 10.7 [.42] 17.8 [.70] Aeroflex / Weinschel CAGE: 93459 Made in U.S.A. PROGRAMMABLE ATTENUATOR MODEL No.: XXXX 12V DC SERNO: XXX J1 32 1 16 8 2 4 4 3 5 CELL No. FOR REFERENCE ONLY 21.5 [.85] 6.4 3.2 [.25] [.13] 5 EQ SP @ 22.42[.88] = 112.1 [4.42] 142.5 [5.61] 35.6 [1.40] J2 1 2 COM 6 7 1.0[.040] SOLDER LEADS (MAY BE TRIMMED BY CUSTOMER) 7X 12.2 [.48] 21.1 [.83] 12.8 [.50] 2X 4-40 UNC - 2B BOTH SIDES 5.08[.20] DEEP 4X 4-40 UNC - 2B BOTH SIDES 5.08[.20] DEEP 27.9 [1.10] 3.8 [.15] 11.4 [.45] 2 132.3 [5.21] NOTE: All dimensions are given in mm (inches) and are nominal, unless otherwise specified. 5305 Spectrum Drive, Frederick, MD 21703-7362 s TEL: 301-846-9222, 800-638-2048 s Fax: 301-846-9116 web: www.aeroflex.com/weinschel s email: [email protected] Revision Date: 2/4/2015