Analog Devices Inc./Maxim Integrated DG405CJ+

Overview

DG405CJ+ from Maxim Integrated is a dual, high-speed, normally open analog switch IC designed for precision signal routing in bipolar or single-supply systems. It features guaranteed 2Ω max on-resistance matching between channels, 3Ω max on-resistance flatness over ±15V signal range, and 15pC max charge injection - enabling low-distortion sampling in test equipment and military radios. Its 150ns max tON/100ns max tOFF switching supports high-throughput data acquisition.

For engineers reviewing the DG405CJ+ datasheet, DG405CJ+ pinout, DG405CJ+ application, or DG405CJ+ equivalent, key selection criteria include rail-to-rail analog signal handling (±15V), TTL/CMOS logic compatibility with separate VL pin, low off-leakage (<5nA at +85°C), and 20-pin LCC packaging for high-reliability mil-aero environments.

Technical Context

The DG405CJ+ implements two independent SPST analog switches fabricated in a 44V silicon-gate process, supporting true bidirectional conduction with matched rDS(ON) across both channels. Its logic interface accepts TTL/CMOS inputs via dedicated VL pin, decoupling control voltage from analog supply rails.

Switch operation is fully specified across ±4.5V to ±20V bipolar supplies or +10V to +30V single supply, with guaranteed analog signal range from V− to V+. Internal substrate connection to V+ ensures latch-up immunity and stable performance over −55°C to +125°C.

Key Specifications

Pinout & Package

Package: 20-pin LCC (Leadless Chip Carrier), hermetically sealed, suitable for high-reliability military and aerospace applications. RoHS-compliant, lead-frame material is Kovar, glass-sealed ceramic body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG405CJ+, ADG405BRUZ offers smaller footprint and lower cost but sacrifices military-grade temperature range and leakage performance, while MAX4645ESE+ improves charge injection and supply flexibility for portable gear but cannot replace DG405CJ+ in ±15V or −55°C environments.

Availability

DG405CJ+ is available at Aetrix Electronics and suitable for military radios, heads-up displays, and guidance systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG405CJ+ 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The DG405CJ+ belongs to Maxim's legacy high-speed analog switch family, engineered for precision signal routing in harsh-environment systems demanding guaranteed matching, low leakage, and extended temperature operation.

FAQ

What is the operating temperature range for DG405CJ+?

The DG405CJ+ is rated for −55°C to +125°C operation, verified per MIL-STD-883B test conditions. This extended range is enabled by its 20-pin LCC ceramic package and 44V silicon-gate process. All electrical specifications - including on-resistance match, leakage, and switching time - are guaranteed across this full range, making DG405CJ+ suitable for aerospace, defense, and downhole industrial applications where ambient extremes are routine.

Does DG405CJ+ support single-supply operation?

Yes, DG405CJ+ supports single-supply operation from +10V to +30V, with analog signal handling from V− = 0V to V+ (e.g., 0V to +15V). In this configuration, V− must be tied to GND, and the analog input/output range spans the full supply rail. The device retains rail-to-rail performance, 15pC charge injection, and <5nA off-leakage at +85°C - critical for portable test gear and battery-operated systems using unipolar supplies.

How does the separate VL pin function in DG405CJ+?

The VL pin on DG405CJ+ provides an independent logic supply reference, allowing TTL/CMOS-compatible switching regardless of analog supply voltages. When VL = +5V, logic thresholds remain fixed at VINH = +2.4V and VINL = +0.8V - even if V+ = +30V or V− = −20V. This isolation prevents logic misstates during analog rail transients and simplifies interface design in mixed-voltage systems, a key advantage over switches with internally derived logic thresholds.

Is DG405CJ+ pin-compatible with other DG40x variants?

No - DG405CJ+ uses a 20-pin LCC package, while DG405CY (plastic DIP) and DG405DK (narrow SO) use 16-pin packages with different pinouts. The 20-pin LCC places S1–S4, D1–D4, and N.C. pins in distinct locations versus the 16-pin layouts. Board redesign is required when migrating to DG405CJ+ from DIP or SO versions; however, the functional behavior (dual SPST, logic polarity, supply ranges) remains identical across all DG405 variants.

What is the maximum analog signal voltage DG405CJ+ can switch?

DG405CJ+ can switch analog signals from V− to V+, with absolute maximum ratings limiting V+ − V− to 44V. For example, with V+ = +20V and V− = −20V, the full ±20V signal range is supported. Operation beyond these rails risks diode clamping and potential damage. The device guarantees rail-to-rail performance - meaning signal fidelity (on-resistance flatness, charge injection, leakage) is maintained at the extremes of V− and V+, unlike many switches that degrade near supply rails.