Vishay Siliconix DG412AK

Overview

DG412AK from Maxim Integrated is a quad, single-pole/single-throw (SPST), normally open (NO) analog switch designed for precision signal routing in high-reliability systems. It features 45Ω max on-resistance, <5nA off-leakage at +85°C, 150ns max tON, ±4.5V to ±20V bipolar or +10V to +30V single-supply operation, and 2000V ESD tolerance-enabling use in military radios and guidance & control systems.

For engineers reviewing the DG412AK datasheet, DG412AK pinout, DG412AK application, or DG412AK equivalent, key selection criteria include guaranteed RDS(ON) matching (≤3Ω), rail-to-rail analog signal handling (±15.5V), TTL/CMOS logic compatibility, low charge injection (10pC max), and extended temperature support (–55°C to +125°C).

Technical Context

The DG412AK implements four independent SPST NO switches using a 44V silicon-gate process, supporting bidirectional conduction with matched channel resistance and flat on-resistance (Δ4Ω max) across the full analog signal range. Its architecture ensures low charge injection and minimal off-leakage over temperature without requiring external level-shifting circuitry.

Logic inputs are TTL/CMOS-compatible with VL configurable to 5V (TTL) or V+ (CMOS); supply sequencing requires V+ applied first to prevent latch-up. The device operates with unbalanced supplies (e.g., +24V/–5V) and tolerates analog signals up to ±15.5V under ±16.5V rails.

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 suitable for high-reliability military/aerospace applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG412BRZ and TS5A3157DCKR, the DG412AK uniquely delivers military-grade temperature range, hermetic CERDIP packaging, and guaranteed channel matching in a quad NO configuration-making it irreplaceable in avionics and defense electronics where reliability and signal integrity are non-negotiable.

Availability

DG412AK is available at Aetrix Electronics and suitable for military radios, guidance & control systems, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG412AK 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 demanding industrial, communications, and defense applications.

The DG412AK belongs to Maxim's precision analog switch product line, engineered specifically for high-reliability signal routing in aerospace, military, and instrumentation systems where extended temperature operation and parameter matching are critical.

FAQ

What is the operating temperature range of the DG412AK?

The DG412AK is rated for –55°C to +125°C operation, verified per MIL-STD-883B testing protocols. This extended range is enabled by its 16-pin CERDIP package and internal 44V silicon-gate process. The specification applies to all electrical parameters including R_DS(ON), leakage, and switching times-making DG412AK suitable for engine bay, avionics, and space-constrained military platforms where ambient temperatures exceed commercial-grade limits.

Is the DG412AK pin-compatible with the standard DG412?

Yes, the DG412AK shares identical pinout, logic behavior, and functional architecture with the industry-standard DG412, including IN1–IN4, D1–D4, S1–S4, V+, V–, GND, and VL assignments. It is explicitly designed as a plug-in upgrade with improved R_DS(ON) matching (≤3Ω vs. older 5Ω spec) and lower off-leakage (<5nA vs. 10nA), allowing drop-in replacement without PCB modification in legacy designs.

What supply configurations does the DG412AK support?

The DG412AK supports both bipolar (±4.5V to ±20V) and single-supply (+10V to +30V) operation. For single-supply use, V– must be tied to 0V; VL should be set to 5V for TTL compatibility or to V+ for CMOS-level inputs. Unbalanced supplies (e.g., +24V/–5V) are permitted provided |V+ – V–| ≤ 44V. All specifications-including analog signal range (±15.5V) and leakage-are guaranteed across these configurations.

How does the DG412AK handle rail-to-rail analog signals?

The DG412AK supports true rail-to-rail analog signal handling: with ±16.5V supplies, it passes signals from –15.5V to +15.5V without clipping or distortion. This capability stems from its silicon-gate process and internal level-shifting design, which maintains low on-resistance and minimal THD across the full range. Signals exceeding V+ or V– are clamped by internal diodes-forward current must be limited to 30mA continuous to avoid damage.

What is the significance of the "AK" suffix in DG412AK?

The "AK" suffix denotes the –55°C to +125°C temperature grade in a 16-pin CERDIP package, qualified to MIL-STD-883B standards. Unlike commercial "C" or industrial "E" variants, the AK version undergoes rigorous screening for hermeticity, thermal cycling, and long-term parameter stability-making DG412AK the only DG412 variant approved for flight-critical and space-qualified applications where failure is not an option.