Analog Devices Inc./Maxim Integrated DG444DJ+

Overview

DG444DJ+ from Maxim Integrated is a quad, normally closed (NC), single-pole/single-throw (SPST) analog switch IC designed for precision signal routing in bipolar or single-supply systems. It features 85Ω max on-resistance at ±15V, 4Ω max on-resistance matching between channels, <5nA off-leakage at +85°C, and rail-to-rail analog signal handling up to ±15V. It is used in test equipment, military radios, and audio signal routing where low charge injection (10pC max) and fast switching (<250ns tON) are critical.

For engineers reviewing the DG444DJ+ datasheet, DG444DJ+ pinout, DG444DJ+ application, or DG444DJ+ equivalent, key selection criteria include guaranteed RON flatness (9Ω max), ESD tolerance (2000V min per Method 3015.7), TTL/CMOS logic compatibility, dual-supply operation (±4.5V to ±20V), and -40°C to +85°C industrial temperature rating.

Technical Context

The DG444DJ+ implements four independent NC SPST switches fabricated using a 44V silicon-gate process, enabling robust operation with supply voltages up to ±20V or +30V. Its architecture guarantees matched on-resistance across all four channels and maintains flat RON over the full analog signal range - critical for precision multiplexing and sample-and-hold circuits.

It supports both bipolar (±4.5V to ±20V) and single-supply (+10V to +30V) configurations, with VL pin configurable for TTL (5V) or CMOS (V+) logic level compatibility. Switch control is inverted: logic low enables conduction (NC behavior), and power-off default state is open.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (0.300" wide), RoHS-compliant, lead-free, with through-hole mounting and industry-standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1411BRZ and TS5A3157DCKR, the DG444DJ+ uniquely combines quad NC topology, ±20V/30V supply support, guaranteed RON flatness, and -40°C to +85°C leakage specs - making it the only drop-in solution for ruggedized, wide-supply, multi-channel analog routing.

Availability

DG444DJ+ is available at Aetrix Electronics and suitable for test equipment, military communications, audio routing, and sample-and-hold circuits requiring stable component supply across extended temperature and high-reliability environments.

Supply support for DG444DJ+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and defense markets.

The DG444DJ+ belongs to Maxim's precision analog switch family, engineered for applications demanding low distortion, high voltage tolerance, and guaranteed parametric matching across channels in mission-critical signal paths.

FAQ

What is the maximum allowable supply voltage for DG444DJ+?

The DG444DJ+ supports absolute maximum ratings of V+ = 44V (vs. V−) and analog signal range up to ±15V under normal operation. For reliable long-term performance, bipolar supply should be limited to ±4.5V to ±20V, and single-supply operation to +10V to +30V. Exceeding ±20V or +30V risks permanent damage per the Absolute Maximum Ratings table.

Is DG444DJ+ pin-compatible with the original DG444CJ?

Yes, DG444DJ+ is pin-compatible with DG444CJ and other 16-pin DIP variants in the DG444 family. Both share identical pinout, NC functionality, and package dimensions. The DG444DJ+ extends the temperature range to −40°C to +85°C and improves off-leakage (<5nA at +85°C) and RON matching (4Ω max), while maintaining full electrical and mechanical interchangeability.

Does DG444DJ+ support single-supply operation?

Yes, DG444DJ+ supports single-supply operation from +10V to +30V. In this mode, connect V− to GND, configure VL for TTL (5V) or CMOS (V+) logic levels, and ensure analog signals remain within 0V to V+ (rail-to-rail). On-resistance increases slightly versus bipolar operation, and switching times lengthen - see Electrical Characteristics tables for single-supply parameter limits.

What is the logic polarity of DG444DJ+ control inputs?

The DG444DJ+ has inverted logic: INx = low (≤0.8V) closes the switch (conducts), and INx = high (≥2.4V) opens it. This NC behavior is inherent to the device architecture and matches standard DG444 family timing diagrams. Logic thresholds are referenced to VL, not V+, so VL must be properly biased (typically 5V for TTL) to ensure correct interpretation.

How does charge injection affect DG444DJ+ performance in sample-and-hold circuits?

DG444DJ+ specifies 10pC max charge injection, directly determining hold-step error in sample-and-hold circuits. With a 10nF hold capacitor, this yields ≤1mV step error - acceptable for 12-bit accuracy. Lower charge injection minimizes settling time and droop-induced nonlinearity, especially critical when sampling fast-changing or high-impedance signals in precision DAQ systems using DG444DJ+.