DAT-31575A Series - Digital Step Attenuator

Sep 17, 2026

DAT-31575A series 75Ω digital step attenuators provide adjustable RF attenuation from 0 to 31.5 dB in 0.5 dB steps with wideband operation from 1 MHz to 2.5 GHz. The devices use a 6-bit serial/parallel control interface and CMOS-on-silicon technology, delivering GaAs-class performance with conventional CMOS benefits. Features include glitchless attenuation transitions, good VSWR (typ. 1.3:1), low insertion loss, high IP3 (+55 to +59 dBm typ.), small 4.0 × 4.0 mm size, and low DC power consumption. Models support single positive or dual positive/negative supply voltages for spurious-free operation and fast switching.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages8

Reading Time20 min

AccessFree to download

Product Overview

Key Features

Typical Applications

General Description

RF Electrical Specifications

Surface Mount Digital Step 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 conventional 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 | Models available with serial or parallel interface mode to suit customer demand. | | Good VSWR, 1.3:1 typ. | 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) . | | Useable over a wide range of supply voltages, +2.3/2.7 to 5.2V | Wide range fo positive operating voltages allows the DAT-31575A+ Series of models tobe used in a wide range of applications. See Application Note AN-70-032 for operation above +3 .6V | | 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](www.minicircuits.com) P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [sales@minicircuits.com](sales@minicircuits.com) Page 1 of 8 Digital Step Attenuator 75Ω 1-2500 MHz 31.5 dB, 0.5 dB Step 6 Bit, Serial Control Interface, Dual Supply Voltages Product Features • Dual Supply (Positive & Negative) Voltages • Immune to latch up • Glitchless attenuation transitions • Excellent accuracy, 0.1 dB Typ • Low Insertion Loss • High IP3, +55-59 dBm Typ • Very low DC power consumption • Excellent return loss, 18 dB Typ • Small size 4.0 x 4.0 mm Typical Applications • DOCSIS® 3.1 • Portable Wireless • CATV & DBS • MMDS & Wireless LAN • Wireless Local Loop • UNII & Hiper LAN • Power amplifier distortion canceling loops Generic photo used for illustration purposes only DAT-31575A-SN+ CASE STYLE: DG983-2 +RoHS Compliant The +Suffix identifies RoHS Compliance. See our web site for RoHS Compliance methodologies and qualifications General Description The DAT-31575A-SN+ is a 75Ω RF digital step attenuator that offers an attenuation range up to 31.5 dB in 0.5 dB steps. The control is a 6-bit Serial interface, operating dual (positive and negative) supply voltages. The DAT-31575A-SN+ is produced using a unique CMOS process on silicon, offering the performance of GaAs, with the advantages of conventional CMOS devices. Simplified Schematic Digital Serial Control Mini-Circuits® [www.minicircuits.com](www.minicircuits.com) P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [sales@minicircuits.com](sales@minicircuits.com) REV. OR M155582 DAT-31575A-SN+ RS/CP/AM 200513 Page 2 of 8 Digital Step Attenuator DAT-31575A-SN+ RF E

FAQs

What attenuation range and step size does the DAT-31575A series support?

The DAT-31575A series provides attenuation from 0 to 31.5 dB in 0.5 dB steps.

What frequency range is specified for operation?

The attenuators are specified for wideband operation from 1 MHz to 2.5 GHz.

How is the device controlled and what switching behavior is highlighted?

Control uses a 6-bit serial/parallel interface, and the attenuators provide glitchless attenuation transitions.

Sep 17, 2026

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