Analog Devices Inc./Maxim Integrated DG441DJ

Overview

DG441DJ from Maxim Integrated is a quad, normally closed (NC), single-pole/single-throw (SPST) analog switch designed for precision signal routing in industrial and test equipment. 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 or +10V to +30V supplies.

For engineers reviewing the DG441DJ datasheet, DG441DJ pinout, DG441DJ application, or DG441DJ equivalent, this device is selected for rail-to-rail analog switching with low distortion, high channel-to-channel uniformity, and robust ESD tolerance (2000V min per Method 3015.7) in temperature-critical environments.

Technical Context

The DG441DJ implements four independent NC SPST switches using a 44V silicon-gate process, enabling operation across wide bipolar and single-supply ranges. Its guaranteed r_DS(ON) flatness (9Ω max) ensures minimal signal-dependent gain variation over ±15.5V analog input range.

Switching is controlled by TTL/CMOS-compatible digital inputs, with logic inversion relative to switch state: logic low enables conduction (ON), logic high disables (OFF). Turn-on time is under 250ns and turn-off under 170ns at ±15V, supporting high-speed multiplexing without timing skew between channels.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (P16-1), -40°C to +85°C operating temperature range.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG441BRZ and TS5A3157DCKR, the DG441DJ uniquely delivers quad-channel, bipolar-rail analog switching with guaranteed channel matching and low leakage across -40°C to +85°C - making it irreplaceable for multi-channel instrumentation where supply flexibility and temperature stability are mandatory.

Availability

DG441DJ is available at Aetrix Electronics and suitable for automated test equipment, industrial data acquisition, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG441DJ 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The DG441DJ belongs to Maxim's precision analog switch product line, engineered specifically for applications demanding low distortion, high channel uniformity, and reliable operation under wide supply and temperature extremes.

FAQ

What is the logic polarity of the DG441DJ control inputs?

The DG441DJ uses active-low logic: a logic low (≤0.8V) on IN1–IN4 closes the corresponding switch (ON state), while a logic high (≥2.4V) opens it (OFF state). This normally closed behavior ensures signal continuity during power-up or controller reset, which is essential for fail-safe analog routing in industrial systems. The DG441DJ maintains this behavior across its full -40°C to +85°C operating range without inversion or timing degradation.

Can the DG441DJ operate from a single +12V supply?

Yes, the DG441DJ supports single-supply operation from +10V to +30V: connect V− to GND and apply +12V to V+. In this configuration, the analog signal range extends from 0V to +12V (rail-to-rail), and specifications such as 85Ω r_DS(ON) max and 10pC charge injection remain valid. However, r_DS(ON) matching (4Ω max) and flatness (9Ω max) are guaranteed only under bipolar supply conditions per the datasheet.

What is the maximum analog signal voltage the DG441DJ can handle?

The DG441DJ supports analog signals from V− to V+, with absolute limits defined by its supply rails. When operated at ±15V, the guaranteed analog range is ±15.5V - meaning signals from -15.5V to +15.5V pass without clipping or increased distortion. Exceeding V+ or V− triggers internal clamping diodes, so the practical maximum differential signal swing is constrained by the chosen supply voltages, not by a fixed voltage rating.

How does the DG441DJ's off-leakage current compare to older DG441 variants?

The DG441DJ improves off-leakage current to <5nA at +85°C - a significant reduction versus legacy DG441 parts, which typically specified ≤20nA at the same temperature. This lower leakage directly extends hold time in sample-and-hold circuits and reduces measurement error in high-impedance sensor interfaces (e.g., pH electrodes or piezoresistive bridges), especially in thermally demanding enclosures where ambient temperature exceeds 70°C.

Is the DG441DJ pin-compatible with the DG441CJ?

Yes, the DG441DJ is pin-compatible with the DG441CJ: both use the same 16-pin plastic DIP package (P16-1) and identical pinout (IN1–IN4, D1–D4, S1–S4, V+, V−, GND, N.C.). The key difference is temperature rating: DG441CJ is rated for 0°C to +70°C, while DG441DJ extends to -40°C to +85°C. No PCB changes are required when upgrading from DG441CJ to DG441DJ in existing designs targeting extended temperature operation.