DSuirfgacietaMlouSnttep Attenuator
DAT-31575A Series
75Ω 0 to 31.5 dB, 0.5 dB Step 1MHz to 2.5 GHz
The Big Deal
• Wideband, operates up to 2.5 GHz
• Glitchless attenuation transitions
• High IP3, 52 dBm
CASE STYLE: DG983-2
Product Overview
The DAT-31575A+ series of 75Ω digital step attenuators provides adjustable attenuation from 0 to 31.5
dB in 0.5 dB steps. The control is a 6-bit serial/parallel interface, and the attenuators operate with either
single positive or dual (positive and negative) supply voltage. DAT-31575A+ series models are produced
by a unique CMOS process on silicon, offering the performance of GaAs with the advantages of conven-
tional CMOS devices.
Key Features
Feature
Advantages
Wideband operation, specified from
1MHz to 2.5 GHz
Can be used in multiple applications such as various versions of DOCSIS, satellite
and defense, reducing part count.
Serial or parallel interface
Good VSWR, 1.3:1 typ.
Models available with serial or parallel interface mode to suit customer demand.
Eases interfacing with adjacent components and results in low amplitude ripple.
Single positive supply models:
(Model suffixes: -SP+ and –PP+)
+2.3 to +3.6V+
Use of single positive supply simplifies power supply design. An internal negative voltage
generator supplies the desired negative voltage. Single positive supply results in excellent
spurious performance, -140 dBm typical.
Dual supply models:
(Model suffixes: -SN+ and –PN+)
+2.7 to +3.6V (Positive) and
-3.6 to -3.2V (Negative)
Dual supply provides spurious-free operation. It also allows fast switching up to 1 MHz
(vs. 25 kHz for single supply).
Wide range fo positive operating voltages allows the DAT-31575A+ Series of models to
be used in a wide range of applications. See Application Note AN-70-032 for operation
above +3.6V
Useable over a wide range of supply volt-
ages, +2.3/2.7 to 5.2V
Footprint compatible to DAT-31575-XX+
Series (XX=SN/SP/PN/PP)
Can fit into existing footprint and provide wideband performance, to 2.5 GHz instead
of 2.0 GHz.
Glitchless Attenuation Transitions, 0.26
typical
Compared to previous generation of digital attenuators which is a vast improvement.
®
Mini-Circuits
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
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