Overview

The DG444 and DG445 monolithic CMOS analog switches are drop-in replacements for the popular DG211 and DG212 series devices. They include four independent single pole single throw (SPST) analog switches and TTL and CMOS compatible digital inputs. These switches feature lower analog ON resistance (85Ω) and faster switch time (tON 250ns) compared to the DG211 and DG212. Charge injection has been reduced, simplifying sample and hold applications. The improvements in the DG444 series are made possible by using a high voltage silicon-gate process. An epitaxial layer prevents the latch-up associated with older CMOS technologies. The 44V maximum voltage range permits controlling ±20V signals when operating with ±20V power supplies. The four switches are bilateral, equally matched for AC or bidirectional signals. The ON resistance variation with analog signals is quite low over a ±5V analog input range. The switches in the DG444 and DG445 are identical, differing only in the polarity of the selection logic.

DG444_DG445 Functional Diagram
DG444_DG445 Functional Diagram
  • ON Resistance (Max) 85Ω
  • Low Power Consumption (PD) <35µW
  • Fast Switching Action
  • tON (Max) 250ns
  • tOFF (Max, DG444) 140ns
  • Low Charge Injection
  • Upgrade from DG211, DG212
  • TTL, CMOS Compatible
  • Single or Split Supply Operation
  • Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

  • Audio Switching
  • Battery Operated Systems
  • Data Acquisition
  • Hi-Rel Systems
  • Sample and Hold Circuits
  • Communication Systems
  • Automatic Test Equipment

Documentation

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
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    Price (USD) | 1ku
    Buy / Sample
    Part Number
    DG445DVZ
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    Samples Available
    		 TSSOP Tube 1 Get Samples,
    DG445DVZ-T
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    		TSSOP Reel 1
    DG445DYZ
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    Samples Available
    		 SOICN Tube 3 1.332 Get Samples,
    DG445DYZ-T
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    		SOICN Reel 3 1.332
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