Analog Devices Inc./Maxim Integrated DG441MY/PR+

Overview

DG441MY/PR+ from Maxim Integrated is a quad, normally closed (NC), single-pole/single-throw (SPST) analog switch IC designed for precision signal routing in high-reliability systems. It features 85Ω max on-resistance, 4Ω max on-resistance matching between channels, 9Ω max on-resistance flatness over signal range, 10pC max charge injection, and operates from ±4.5V to ±20V bipolar or +10V to +30V single supply - enabling rail-to-rail analog switching in military-grade avionics and test instrumentation.

For engineers reviewing the DG441MY/PR+ datasheet, DG441MY/PR+ pinout, DG441MY/PR+ application, or DG441MY/PR+ equivalent, this device delivers verified low leakage (<5nA at +85°C), fast switching (tON < 250ns), TTL/CMOS-compatible logic inputs, and ESD tolerance of 2000V per Method 3015.7 - critical for ruggedized analog multiplexing and sample-and-hold circuits requiring stable channel-to-channel performance.

Technical Context

The DG441MY/PR+ implements four independent SPST switches with normally closed configuration, each using silicon-gate process technology to achieve guaranteed rDS(ON) matching and flatness under bipolar supply operation. Its internal architecture supports bidirectional conduction and rail-to-rail analog signal handling without degradation in on-resistance across the full ±15.5V signal range.

Switch control uses standard TTL/CMOS logic thresholds (VINH = 2.4V, VINL = 0.8V), with logic inversion relative to switch state: logic low enables conduction (closed), logic high disables (open). The device requires proper power sequencing (V+ before V−) and supports unbalanced supplies such as +24V/−5V, provided |V+ − V−| ≤ 44V.

Key Specifications

Pinout & Package

Package: 16-pin narrow SO (SOIC-16), lead(Pb)-free, rated for −55°C to +125°C operation. Exposed pad not present in SO package - only applicable to Thin QFN variants.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Compared with ADG441BRZ and MAX4617ESA+, the DG441MY/PR+ uniquely combines extended temperature operation (−55°C to +125°C), guaranteed NC behavior, and matched on-resistance flatness - making it the sole option for MIL-STD-883B-aligned avionics and high-reliability downhole systems where channel consistency and power-loss continuity are non-negotiable.

Availability

DG441MY/PR+ is available at Aetrix Electronics and suitable for avionics signal routing, military radio front-ends, and high-temperature downhole instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG441MY/PR+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and aerospace applications.

The DG441MY/PR+ belongs to Maxim's high-reliability analog switch product line, engineered specifically for mission-critical systems requiring extended temperature operation, low leakage, and fail-safe NC switching behavior.

FAQ

What is the operating temperature range for DG441MY/PR+?

The DG441MY/PR+ is rated for −55°C to +125°C operation, confirmed in the Maxim ordering information table. This extended temperature grade makes DG441MY/PR+ suitable for aerospace, defense, and downhole applications where commercial or industrial grade switches would fail. The device undergoes screening and testing across this full range to guarantee parametric performance including leakage, on-resistance, and switching time.

Is DG441MY/PR+ a normally open or normally closed switch?

DG441MY/PR+ is a normally closed (NC) analog switch - meaning each of its four SPST channels conducts by default when logic inputs are low (0V or 0.8V). When logic inputs go high (2.4V or 5V), the switches open. This NC behavior provides inherent fail-safe continuity during power loss or controller reset, a key requirement in DG441MY/PR+'s target applications like flight control and guidance systems.

Does DG441MY/PR+ support single-supply operation?

Yes, DG441MY/PR+ supports single-supply operation from +10V to +30V, with V− tied to ground. In this configuration, the analog signal range extends from 0V to V+, enabling rail-to-rail switching in battery-powered or industrial PLC designs. The datasheet specifies performance parameters including rDS(ON) and leakage under both single- and bipolar-supply conditions, confirming DG441MY/PR+'s flexibility across diverse power architectures.

What is the maximum allowable voltage difference between V+ and V− for DG441MY/PR+?

The absolute maximum voltage difference between V+ and V− for DG441MY/PR+ is 44V, as specified in the Absolute Maximum Ratings table. This limit applies regardless of whether supplies are balanced (e.g., ±15V) or unbalanced (e.g., +24V/−5V). Exceeding 44V risks permanent damage, and proper sequencing (V+ before V−) is required to avoid latch-up - both constraints directly impact DG441MY/PR+'s integration into high-voltage industrial or military power systems.

How does DG441MY/PR+ handle charge injection in sample-and-hold circuits?

DG441MY/PR+ guarantees ≤10pC maximum charge injection, measured with CL = 1nF and VD = ±10V under bipolar supply conditions. This low value minimizes hold-mode voltage step errors in precision sample-and-hold circuits - especially critical in high-resolution data acquisition systems where DG441MY/PR+ serves as the input switch. The specification is tested and guaranteed across temperature, ensuring consistent performance in DG441MY/PR+'s −55°C to +125°C operating range.