Analog Devices Inc./Maxim Integrated DG441DK

Overview

DG441DK from Maxim Integrated is a quad, normally closed (NC), single-pole/single-throw (SPST) analog switch designed for precision signal routing in high-reliability systems. It features 85Ω max on-resistance, 4Ω max on-resistance matching between channels, <5nA off-leakage at +85°C, 10pC max charge injection, and rail-to-rail analog signal handling from ±4.5V to ±20V or +10V to +30V supplies - enabling use in military-grade test equipment and guidance control interfaces.

For engineers reviewing the DG441DK datasheet, DG441DK pinout, DG441DK application, or DG441DK equivalent, key selection criteria include guaranteed r_DS(ON) flatness (9Ω max), TTL/CMOS logic compatibility, ESD tolerance ≥2000V (Method 3015.7), and CERDIP packaging for extended temperature operation (-40°C to +85°C).

Technical Context

The DG441DK implements four independent NC SPST switches fabricated using a 44V silicon-gate process, supporting both bipolar (±4.5V to ±20V) and single-supply (+10V to +30V) operation with V- tied to GND. Each switch conducts bidirectionally with matched on-resistance across all four channels.

Its internal architecture guarantees low charge injection (10pC max) and minimal on-resistance variation over the full analog signal range (±15.5V), while maintaining <5nA off-leakage current at +85°C - critical for sample-and-hold circuits and high-impedance sensor interfaces where signal integrity must be preserved across temperature extremes.

Key Specifications

Pinout & Package

Package: 16-pin CERDIP (Ceramic Dual In-line Package), hermetically sealed, rated for -40°C to +85°C operation, with exposed substrate connection via Pin 13 (V+).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG441BRZ and MAX4617CSE+, the DG441DK uniquely combines CERDIP packaging, guaranteed 4Ω r_DS(ON) matching, and <5nA off-leakage at +85°C - making it the only option qualified for high-stability, multi-channel analog multiplexing in defense-grade embedded systems.

Availability

DG441DK is available at Aetrix Electronics and suitable for military radios, guidance and control systems, and high-reliability test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG441DK 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 high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and aerospace applications.

The DG441DK belongs to Maxim's precision analog switch product line, engineered specifically for high-reliability signal routing in military, avionics, and instrumentation systems where leakage, matching, and rugged packaging are critical.

FAQ

What is the operating temperature range for the DG441DK?

The DG441DK is specified for operation from −40°C to +85°C. This extended temperature range is enabled by its 16-pin CERDIP package, which provides hermetic sealing and superior thermal stability compared to plastic DIP or SO packages. The device maintains guaranteed specifications-including <5nA off-leakage and 4Ω r_DS(ON) matching-across this full range, making DG441DK suitable for deployment in vehicle-mounted guidance systems and outdoor test instrumentation.

Is the DG441DK pin-compatible with the standard DG441 family?

Yes, the DG441DK shares identical pinout and electrical behavior with other DG441 variants (e.g., DG441DJ, DG441CY), including IN1–IN4, S1–S4, D1–D4, V+, V−, GND, and N.C. assignments. Its CERDIP footprint matches JEDEC MS-001, allowing drop-in replacement in existing layouts designed for 16-pin ceramic packages-no PCB redesign is needed when upgrading from plastic or SO versions to DG441DK for enhanced environmental robustness.

Does the DG441DK support single-supply operation?

Yes, the DG441DK operates from a single +10V to +30V supply by connecting V− to GND. In this configuration, the analog signal range becomes 0V to V+ − 0.5V (e.g., 0V to +11.5V with +12V supply), preserving rail-to-rail functionality. Logic inputs remain TTL/CMOS compatible, and all key specs-including 10pC charge injection and 85Ω r_DS(ON)-are maintained, enabling use in battery-powered portable test equipment without dual-rail generation.

How does the DG441DK handle electrostatic discharge?

The DG441DK meets or exceeds 2000V human-body-model (HBM) ESD tolerance per Method 3015.7, verified through standardized testing. This rating is achieved via internal protection structures integrated into the 44V silicon-gate process, eliminating the need for external TVS diodes in most board-level ESD scenarios. The CERDIP package further enhances system-level robustness by reducing moisture ingress and mechanical stress-induced failure modes that can degrade ESD performance over time.

What is the significance of "normally closed" in DG441DK functionality?

"Normally closed" means each of the four SPST switches in the DG441DK defaults to a conductive state (low r_DS(ON)) when its corresponding INx input is logic low (≤0.8V). A logic high (≥2.4V) opens the switch. This fail-safe behavior ensures signal continuity during power-up, reset, or controller faults-critical in guidance systems where uninterrupted sensor feedback prevents loss of attitude control. DG441DK's NC architecture contrasts with DG442DK's normally open design.