Analog Devices Inc./Maxim Integrated DG405AK/883B

Overview

DG405AK/883B from Maxim Integrated is a dual, high-speed, double-pole/single-throw (DPST) analog switch with guaranteed 2Ω max on-resistance matching between channels, 3Ω max on-resistance flatness over ±15V signal range, and 15pC max charge injection. It operates from ±4.5V to ±20V bipolar supplies or +10V to +30V single supply and is qualified per MIL-STD-883B for military-grade reliability in guidance systems and test equipment.

For engineers reviewing the DG405AK/883B datasheet, DG405AK/883B pinout, DG405AK/883B application, or DG405AK/883B equivalent, key selection criteria include rail-to-rail analog signal handling (±15V), sub-150ns switching times, <5nA off-leakage at +85°C, TTL/CMOS logic compatibility, and CERDIP-16 hermetic packaging for harsh-environment deployment.

Technical Context

The DG405AK/883B implements two independent normally open SPST switches in a single DPST configuration, controlled by separate digital inputs IN1 and IN2. Its silicon-gate 44V process enables robust rail-to-rail conduction and low charge injection critical for precision sample-and-hold circuits.

Switching is bidirectional with symmetric on-resistance (20Ω typ), matched within 2Ω max across channels, and flat to within 3Ω over the full ±15V analog range. Off-isolation exceeds 72dB at 1MHz, and crosstalk remains below –90dB under matched 50Ω/100Ω loads.

Key Specifications

Pinout & Package

Package: 16-pin CERDIP (ceramic dual in-line package), hermetically sealed, MIL-STD-883B qualified, -40°C to +85°C operating temperature range.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed analog switch applications.

Compared with DG405AK/883B, ADG405BRZ offers lower cost but sacrifices hermetic reliability and off-isolation, while MAX4675CSE+ delivers superior charge injection performance yet eliminates bipolar operation-making DG405AK/883B the sole choice for ruggedized, rail-to-rail, MIL-qualified dual-switch applications.

Availability

DG405AK/883B is available at Aetrix Electronics and suitable for guidance and control systems, test equipment, heads-up displays, and military radios requiring stable component supply, long-term obsolescence management, and traceable MIL-qualified sourcing.

Supply support for DG405AK/883B 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 defense markets.

The DG405AK/883B belongs to Maxim's legacy high-speed analog switch family, designed specifically for precision, high-reliability signal routing in military and aerospace systems where rail-to-rail operation, low distortion, and environmental resilience are mandatory.

FAQ

What is the maximum analog signal voltage range supported by DG405AK/883B?

The DG405AK/883B supports analog signals from V− to V+, with a typical range of ±15V under bipolar supply conditions (V+ = +15V, V− = −15V). This rail-to-rail capability allows undistorted switching of full-scale signals in precision instrumentation and military avionics without external level shifting. The absolute maximum analog voltage is clamped by internal diodes at V− −2V and V+ +2V.

Does DG405AK/883B require separate logic and analog supplies?

Yes, DG405AK/883B requires three distinct supply connections: V+ and V− for the analog switch core, and VL (typically +5V) for the logic interface. VL must be referenced to GND and maintained at +5V for guaranteed TTL compatibility; connecting VL to V+ or other voltages shifts input thresholds to CMOS levels. Power sequencing mandates V+ first, then VL, then V− and logic inputs.

Is DG405AK/883B pin-compatible with standard DG405 variants like DG405AK or DG405DY?

Yes, DG405AK/883B shares identical pinout and footprint with all DG405 variants in the 16-pin CERDIP package (e.g., DG405AK, DG405AZ), including matching terminal assignments for S1/S2, D1/D2, IN1/IN2, V+, V−, VL, and GND. The /883B suffix denotes additional MIL-STD-883B testing and screening-not a physical or electrical redesign-so PCB layout and schematic symbols remain fully interchangeable.

What is the guaranteed on-resistance flatness specification for DG405AK/883B?

DG405AK/883B guarantees on-resistance flatness of 3Ω maximum over the full specified analog signal range (±15V). This means the difference between the highest and lowest rDS(ON) values measured across the entire signal swing does not exceed 3Ω-critical for maintaining consistent gain and linearity in audio routing, sensor multiplexing, and precision DAC output switching.

How does DG405AK/883B handle overvoltage conditions on analog pins?

DG405AK/883B includes internal clamp diodes that limit analog pin voltages to V− −2V and V+ +2V. To prevent damage during fault conditions or improper power sequencing, external series blocking diodes may be added (per Figure 1 in the datasheet), reducing the usable analog range by ~1V but preserving low on-resistance and leakage performance. Absolute maximum ratings must never be exceeded-even transiently-as permanent damage may result.