TRUTH TABLE
Attenuation Control Inputs
Setting, dB ‘‘6" ’’7" ‘‘8" ’’9"
Reference 0000
11000
20100
40010
80001
‘‘1" = Logic High TTL
‘‘0" = Logic Low TTL
V Package Outline - 24 pin Dual In Line GENERAL SPECIFICATIONS
Frequency Range: 50 - 1500 MHz
Attenuation Range: 0 - 15 dB
Minimum Step Size: 1 dB
Attenuation Flatness: ± 0.5 dB/bit max.
± 1.0 dB max
Attenuation Accuracy: ± 0.5 dB at fo
Insertion Loss: 4 dB max.
Phase Variation: ± 10° typ.
VSWR: 1.7:1 max.
Impedance: 50 Ω nom.
Switching Delay Time: 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: +32 dBm typ.
Input Power: 0.25 W max.
Weight, nominal: 0.4 oz (11 g)
Operating Temperature: -- 55° to +85°C
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
For further information contact MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531
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
Typical Performance
