ADS-41V-1000 15 dB DIGITAL ATTENUATOR 50 to 1500 MHz / 0 to 15 dB in 1 dB Steps / 4-Bit Direct TTL Control / Monotonic / +5V Supply V Package Outline - 24 pin Dual In Line TRUTH TABLE Attenuation Setting, dB Reference 1 2 4 8 Control Inputs ‘‘6" ’’7" ‘‘8" ’’9" 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 ‘‘1" = Logic High TTL ‘‘0" = Logic Low TTL GENERAL SPECIFICATIONS Frequency Range: Attenuation Range: Minimum Step Size: Attenuation Flatness: Attenuation Accuracy: Insertion Loss: Phase Variation: VSWR: Impedance: Switching Delay Time: 50 - 1500 MHz 0 - 15 dB 1 dB ± 0.5 dB/bit max. ± 1.0 dB max ± 0.5 dB at fo 4 dB max. ± 10° typ. 1.7:1 max. 50 Ω nom. 2 µs typ. (50% control transition to 10/90% RF) Switching Transients: 20 mV typ. (50% control transition to 10/90% RF) Bias Requirement: +5 VDC @ 80 mA nom. Input Intercept Point: Input Power: Weight, nominal: Operating Temperature: +32 dBm typ. 0.25 W max. 0.4 oz (11 g) -- 55° to +85°C Typical Performance NOTES: 1. Tolerance on 3 place decimals ± .010(.25) except as noted. 2. Dimensions in inches over millimeters. 3. Lead dimensions apply only at body. 4. All unmarked terminals are ground. General Notes: 1. The ADS-41V-1000 is constant impedance, 4-bit digital attenuator covering 50 to 1500 MHz and driven directly by TTL logic. PIN diode switched attenuator pads are activated by Advanced Fact C-MOS, TTL compatible logic drivers, allowing high speed operation without need of a negative supply. 2. Careful design of thick film resistive pads and detailed selection of suitable PIN diodes provide a wide bandwidth with minimal phase shift. 25Mar96 For further information contact MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531