Analog Devices Inc./Maxim Integrated DG441AK/883B

Overview

DG441AK/883B from Maxim Integrated is a quad, normally-closed (NC), single-pole/single-throw (SPST) analog switch designed for high-reliability military and aerospace signal routing. It features 85Ω max on-resistance, 4Ω max on-resistance matching between channels, <5nA off-leakage at +85°C, 10pC max charge injection, and operates from ±4.5V to ±20V bipolar or +10V to +30V single supply - enabling rail-to-rail analog signal handling in guidance systems and hardened test equipment.

For engineers reviewing the DG441AK/883B datasheet, DG441AK/883B pinout, DG441AK/883B application, or DG441AK/883B equivalent, key selection criteria include guaranteed r_DS(ON) flatness (9Ω max), MIL-STD-883B Class B screening, -55°C to +125°C operation, and compatibility with TTL/CMOS logic levels under extreme temperature and voltage conditions.

Technical Context

The DG441AK/883B implements four independent NC SPST switches using a 44V silicon-gate process, supporting bidirectional conduction with matched channel performance. Its architecture guarantees on-resistance flatness over the full analog signal range and low charge injection critical for precision sample-and-hold circuits.

It requires strict power-supply sequencing (V+ first, then V− and logic inputs) and supports unbalanced supplies (e.g., +24V/−5V). The exposed pad in QFN variants must be connected to V+, but DG441AK/883B uses CERDIP packaging with no exposed pad - eliminating thermal pad routing concerns while maintaining hermetic reliability.

Key Specifications

Pinout & Package

Package: 16-pin CERDIP (J16-3), hermetically sealed ceramic dual-in-line package rated for -55°C to +125°C operation and MIL-STD-883B screening.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG441BRZ and HS-441RH, DG441AK/883B uniquely delivers MIL-STD-883B Class B screening, 85Ω r_DS(ON), and 10pC charge injection in a hermetic CERDIP package - making it the only option qualified for high-reliability, extended-temperature, non-radiation-hardened defense systems.

Availability

DG441AK/883B is available at Aetrix Electronics and suitable for guidance and control systems, hardened test equipment, military radios, heads-up displays, and other applications requiring stable component supply across extended temperature ranges and rigorous reliability screening.

Supply support for DG441AK/883B 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 high-reliability semiconductor solutions for industrial, automotive, communications, and defense markets.

The DG441AK/883B belongs to Maxim's high-performance analog switch product line, engineered specifically for military, aerospace, and harsh-environment applications demanding guaranteed parametric performance across extreme temperatures and mechanical stress.

FAQ

What is the operating temperature range for DG441AK/883B?

DG441AK/883B is specified for operation from -55°C to +125°C. This extended range is validated per MIL-STD-883B testing methods including thermal cycling (Method 5007) and steady-state life (Method 5005), ensuring reliable performance in jet engine bays, space vehicle compartments, and desert-deployed electronics where ambient extremes exceed commercial grade limits.

Does DG441AK/883B require external blocking diodes for overvoltage protection?

No - DG441AK/883B includes internal clamping diodes on all S, D, and IN pins, limiting forward current to 30mA per terminal. However, proper power-supply sequencing (V+ first, then V− and logic inputs) is mandatory. External diodes are optional only if system-level overvoltage exceeds absolute maximum ratings (e.g., >44V between V+ and V−).

Is DG441AK/883B pin-compatible with standard DG441 variants like DG441DJ or DG441CY?

Yes - DG441AK/883B uses the same 16-pin CERDIP footprint (J16-3) and identical pinout as other DG441 family members. All IN/D/S/V+/V−/GND/N.C. assignments match exactly, allowing drop-in replacement in existing layouts when upgrading to MIL-STD-883B screening and extended temperature capability.

What logic levels are compatible with DG441AK/883B inputs?

DG441AK/883B accepts TTL- and CMOS-compatible logic levels: VINL ≤ 0.8V (logic low), VINH ≥ 2.4V (logic high), with input currents ≤ ±5nA at +25°C. This allows direct interfacing with FPGA I/O banks, microcontroller GPIOs, and discrete logic families without level-shifting circuitry - even under full temperature and supply variation.

How does the normally-closed (NC) configuration of DG441AK/883B affect system fail-safe behavior?

In DG441AK/883B, each switch defaults to closed (low-resistance path) when INx = 0V. This provides inherent fail-safe continuity during power loss, reset, or logic fault - critical in safety-critical paths like emergency sensor monitoring or backup display routing where open-circuit failure could compromise system function.