ADS-51V-1000 31 dB DIGITAL ATTENUATOR 50 to 1500 MHz / 0 to 31 dB Attenuation / Monotonic / 5-Bit Direct TTL Drive / +5V Supply V Package Outline - 24 pin Dual In Line GENERAL SPECIFICATIONS TRUTH TABLE Attenuation Setting, dB Reference 1 2 4 8 16 Frequency Range: Attenuation Range: Minimum Step Size: Attenuation Flatness: 50 - 1500 MHz 0 - 31 dB 1 dB ± 0.5 dB/bit max. ± 1.0 dB max. Attenuation Accuracy: ± 0.5 dB at fo Insertion Loss: 5 dB max. Phase Variation: ± 10° typ. at fo VSWR: 1.7:1 max. Impedance: 50 Ω nom. Switching Delay Time: 2 µs typ. Control Input ‘‘6" ’’7" ‘‘8" ’’9" ‘‘5" 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 ‘‘1" = Logic High TTL ‘‘0" = Logic Low TTL (50% control transition to 10/90% RF) Switching Transients: 20 mV typ. (50% control transition to 10/90% RF) Bias Requirement: +5 VDC @ 100 mA nom. Input Intercept Point: +32 dBm typ. Power Input 0.25 W max. Weight, nominal: 0.4 oz (11 g) Operating Temperature:-- 55° to +85°C NOTES: General Notes: 1. The ADS-51V-1000 is a 50 to 1,500 MHz constant impedance 5-bit digital attenuator designed to be driven directly from 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. Careful design of thick film resistive pads and detailed selection of suitable PIN diodes provide a wide bandwidth with minimal phase shift. 2. Screened versions with extended reliability components are available for applications requiring the highest reliability. 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. 30Apr96 For further information contact MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531