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
TRUTH TABLE
Attenuation
Setting, dB
Reference
1
2
4
8
16
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
GENERAL SPECIFICATIONS
50 - 1500 MHz
0 - 31 dB
1 dB
±
0.5 dB/bit max.
±
1.0 dB max.
Attenuation Accuracy:
±
0.5 dB at f
o
Insertion Loss:
5 dB max.
Phase Variation:
±
10° typ. at f
o
VSWR:
1.7:1 max.
Impedance:
50
Ω
nom.
Switching Delay Time: 2
µs
typ.
(50% control transition to 10/90% RF)
Frequency Range:
Attenuation Range:
Minimum Step Size:
Attenuation Flatness:
‘‘1" = Logic High TTL
‘‘0" = Logic Low TTL
Switching Transients:
Bias Requirement:
20 mV typ.
+5 VDC
@ 100 mA nom.
(50% control transition to 10/90% RF)
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:
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
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.
For further information contact
MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531
MERRIMAC [ MERRIMAC INDUSTRIES, INC. ]
