Analog Devices Inc./Maxim Integrated DG403DJ+

Overview

DG403DJ+ from Maxim Integrated is a dual, single-pole/double-throw (SPDT) high-speed analog switch with two normally open and two normally closed channels. It features 20Ω typical on-resistance, 2Ω maximum on-resistance matching between channels, 3Ω maximum on-resistance flatness over ±15V signal range, and 15pC maximum charge injection - enabling precision signal routing in sample-and-hold circuits and test equipment.

For engineers reviewing the DG403DJ+ datasheet, DG403DJ+ pinout, DG403DJ+ application, or DG403DJ+ equivalent, this device supports rail-to-rail analog signal handling from ±4.5V to ±20V bipolar supplies or +10V to +30V single supply, delivers 150ns max tON/100ns max tOFF switching, and maintains TTL/CMOS logic compatibility with VL = +5V.

Technical Context

The DG403DJ+ implements a silicon-gate CMOS architecture with substrate tied to V+, enabling robust overvoltage tolerance up to 44V. Its dual SPDT topology provides independent break-before-make control per channel pair, with guaranteed 10–20ns delay between opening one path and closing the other.

It operates with separate analog supplies (V+, V−), logic supply (VL), and ground, allowing level-shifting between logic and analog domains. Internal clamping diodes protect S/D terminals against signals exceeding V+ or V−, provided forward current remains ≤20mA per terminal.

Key Specifications

Pinout & Package

DG403DJ+ is supplied in a 16-pin plastic DIP package (0.300" wide), with pin 1 marked by notch or dot. Pin functions are validated per Maxim's official DG403 pin configuration diagrams and truth tables.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG403DJ+, ADG403BRZ offers higher absolute voltage rating but trades off on-resistance and charge injection performance, while TS5A3157DCKR targets low-voltage CMOS systems and cannot operate from bipolar supplies - making neither a drop-in replacement, but both viable alternatives for distinct voltage and precision requirements.

Availability

DG403DJ+ is available at Aetrix Electronics and suitable for test equipment, guidance and control systems, and audio signal routing requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and defense programs.

Supply support for DG403DJ+ 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 industrial, medical, and communications applications.

DG403DJ+ belongs to Maxim's legacy high-speed analog switch family, engineered for rail-to-rail signal integrity, low charge injection, and robust bipolar operation in demanding instrumentation and military-grade systems.

FAQ

What is the operating temperature range for DG403DJ+?

The DG403DJ+ is rated for −40°C to +85°C operation, as confirmed by Maxim's ordering information table where "DG403DJ" maps to the "DG40_D_" temperature grade. This range is validated across all electrical specifications including on-resistance, leakage, and switching times - ensuring reliable performance in industrial and extended-temperature environments.

Does DG403DJ+ support single-supply operation?

Yes, DG403DJ+ supports single-supply operation from +10V to +30V, as explicitly stated in the "Existing Features" and "Electrical Characteristics" sections. In this mode, analog signals can swing rail-to-rail from GND to V+, and VL must be tied to +5V for TTL compatibility - enabling use in 12V or 24V systems without negative rails.

What is the function of the VL pin on DG403DJ+?

The VL pin on DG403DJ+ sets the logic threshold reference: when VL = +5V, the device accepts standard TTL/CMOS logic levels (0.8V/2.4V). If VL is tied to V+, logic thresholds scale with supply - requiring CMOS-level drivers. This pin decouples logic interface voltage from analog supply rails, enabling flexible host controller interfacing.

Can DG403DJ+ handle analog signals beyond V+ or V−?

No - signals on S or D pins exceeding V+ or V− are clamped by internal diodes, as noted in Absolute Maximum Ratings. Forward current must be limited to ≤20mA per terminal to avoid damage. For overvoltage protection beyond ±20V, external series diodes (as shown in Figure 1) are required - reducing usable analog range by ~1V per rail.

Is DG403DJ+ pin-compatible with older DG403 variants?

Yes - DG403DJ+ uses the same 16-pin DIP footprint and pinout as legacy DG403 devices (e.g., DG403DJ), as confirmed by identical top-view diagrams and pin descriptions across datasheet revisions. The "redesigned" designation refers to improved parameters (rDS(ON) match, leakage, charge injection), not mechanical or logical changes.