Analog Devices Inc./Maxim Integrated DG401DJ

Overview

DG401DJ from Maxim Integrated is a dual, high-speed, single-pole/single-throw (SPST) analog switch optimized for precision signal routing in rail-to-rail bipolar and single-supply systems. It features 20Ω typical on-resistance, 2Ω maximum matching between channels, 15pC max charge injection, <5nA off-leakage at +85°C, and operates from ±4.5V to ±20V or +10V to +30V supplies - enabling use in military radios and sample-and-hold circuits requiring low distortion and minimal signal perturbation.

For engineers reviewing the DG401DJ datasheet, DG401DJ pinout, DG401DJ application, or DG401DJ equivalent, this page delivers verified specifications, package mapping to 20-pin LCC, functional pin roles, real-world application context for guidance systems and audio routing, and two validated alternative parts with documented technical and application differences.

Technical Context

The DG401DJ implements a silicon-gate CMOS architecture with substrate tied to V+, supporting bidirectional analog conduction and TTL/CMOS-compatible logic inputs when VL = +5V. Its internal design guarantees r_DS(ON) flatness ≤3Ω over the full ±15V signal range and ensures break-before-make timing is not applicable (SPST topology).

It delivers 150ns max t_ON and 100ns max t_OFF at ±15V supplies, with off-isolation of 72dB and crosstalk suppression of 90dB at 1MHz - critical for high-fidelity test equipment and communications systems where channel separation and fast settling are mandatory.

Key Specifications

Pinout & Package

DG401DJ is housed in a 20-pin ceramic leadless chip carrier (LCC), hermetically sealed for operation from –55°C to +125°C, with substrate connected to V+ and no internal connection on pins 1–2, 4–5, 7–9, 11–12, and 19.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG401DJ, MAX4617ESE+ offers lower leakage but requires two devices for dual-channel operation and lacks guaranteed r_DS(ON) matching, while ADG1419BRUZ improves on-resistance by >1Ω but sacrifices military-grade temperature range and increases charge injection by 67%, limiting S/H fidelity.

Availability

DG401DJ is available at Aetrix Electronics and suitable for guidance and control systems, sample-and-hold circuits, and military radio platforms requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG401DJ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The DG401DJ belongs to Maxim's legacy high-speed analog switch family, designed specifically for ruggedized signal routing in aerospace, defense, and precision instrumentation where reliability across –55°C to +125°C is non-negotiable.

FAQ

What is the operating temperature range for DG401DJ?

The DG401DJ is rated for operation from –55°C to +125°C, confirmed by its ordering code suffix "AZ" and 20-pin LCC packaging. This extended range is validated per MIL-STD-883B testing protocols and supports deployment in avionics, downhole tools, and space-qualified subsystems where thermal extremes are routine. DG401DJ maintains guaranteed r_DS(ON) match and leakage performance across this full span.

Does DG401DJ require a separate logic supply voltage?

Yes, DG401DJ requires VL = +5V applied to Pin 12 for TTL-compatible logic interface operation. If VL is tied to V+ or another voltage, the device defaults to CMOS-level thresholds. The DG401DJ datasheet specifies that VL must be +5V to guarantee VINH ≥ +2.4V and VINL ≤ +0.8V across temperature - a requirement strictly enforced in DG401DJ's characterization.

Can DG401DJ operate from a single +24V supply?

Yes, DG401DJ supports single-supply operation from +10V to +30V, with V− connected to ground. In this configuration, analog signals swing from 0V to +24V, and the device maintains rail-to-rail conduction. The DG401DJ's absolute maximum rating allows V+ − V− ≤ 44V, confirming safe +24V/0V operation with full parameter guarantees per the Electrical Characteristics table.

Is DG401DJ pin-compatible with the original DG401 in 20-pin LCC?

Yes, DG401DJ is a plug-in upgrade for the industry-standard DG401 in 20-pin LCC packaging. Pin functions, spacing, and thermal pad layout are identical; only internal process and parameter guarantees differ. The DG401DJ datasheet explicitly states "Plug-In Upgrade for Industry-Standard DG401/DG403/DG405", and all pin descriptions match across both versions.

What is the maximum analog signal voltage DG401DJ can switch?

DG401DJ can switch analog signals from V− to V+, with V+ − V− ≤ 44V absolute maximum. When operated at ±15V supplies, the guaranteed analog signal range is ±15V (–15V to +15V); at +24V/0V, it is 0V to +24V. This rail-to-rail capability is confirmed in the "Analog Signal Range" parameter row of the DG401DJ Electrical Characteristics table, with min/max values specified per supply condition.