Analog Devices Inc./Maxim Integrated DG441DY

Overview

DG441DY 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 delivers 85Ω max on-resistance, 4Ω max on-resistance matching between channels, <5nA off-leakage at +85°C, 10pC max charge injection, and rail-to-rail analog signal handling from ±15V supplies - used in test equipment, audio-signal routing, and battery-operated systems.

For engineers reviewing the DG441DY datasheet, DG441DY pinout, DG441DY application, or DG441DY equivalent, key selection criteria include guaranteed r_DS(ON) flatness (9Ω max), TTL/CMOS logic compatibility, dual-supply operation (±4.5V to ±20V), low power consumption (1.65mW), and ESD tolerance (2000V min).

Technical Context

The DG441DY implements four independent NC SPST switches fabricated using a 44V silicon-gate process. Each channel features matched on-resistance (≤4Ω) and flat on-resistance over the full analog range (≤9Ω), enabling consistent signal attenuation across channels and voltage swing.

It supports both bipolar (±4.5V to ±20V) and single-supply (10V to 30V) operation with rail-to-rail analog signal handling. Logic inputs are TTL/CMOS-compatible, and internal clamping diodes protect against signal overvoltage relative to V+ or V−.

Key Specifications

Pinout & Package

Package: 16-pin narrow SO (Small Outline) - RoHS-compliant, surface-mount, 7.5mm × 10.3mm body, 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG441BRZ and TS5A3157DCKR, the DG441DY uniquely combines quad NC topology, bipolar supply support, sub-10pC charge injection, and guaranteed r_DS(ON) matching - making it irreplaceable in legacy test equipment upgrades and high-accuracy analog multiplexing where channel consistency and fail-safe default state are mandatory.

Availability

DG441DY is available at Aetrix Electronics and suitable for test equipment, audio-signal routing, and battery-operated systems requiring stable component supply, long-term lifecycle support, and guaranteed −40°C to +85°C performance.

Supply support for DG441DY 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 computing markets.

The DG441DY belongs to Maxim's precision analog switch product line, engineered for applications demanding low distortion, low leakage, and robust operation in harsh environments - including automated test equipment and military-grade communication systems.

FAQ

What is the logic behavior of DG441DY?

The DG441DY is a normally closed (NC) analog switch: each channel conducts when its corresponding IN pin is logic low (≤0.8V), and opens when IN is logic high (≥2.4V). This failsafe default state ensures signal continuity during power-up or controller reset. The DG441DY's inverted logic differs from the DG442DY (NO type), and both share identical electrical specs except for switch state polarity.

Does DG441DY support single-supply operation?

Yes, DG441DY operates from a single +10V to +30V supply: connect V− to ground, apply V+ to the positive rail, and ensure logic inputs meet TTL/CMOS thresholds. In this mode, the analog signal range spans 0V to V+, preserving rail-to-rail capability. Performance parameters like r_DS(ON) and leakage remain specified across the full temperature range, though on-resistance increases slightly versus bipolar operation.

What is the maximum allowable voltage difference between V+ and V− for DG441DY?

The absolute maximum voltage difference between V+ and V− for DG441DY is 44V, per the Absolute Maximum Ratings table. This limit applies regardless of individual rail values - e.g., +24V and −5V (29V differential) is acceptable, but +30V and −20V (50V differential) exceeds specification and risks permanent damage. Exceeding 44V violates the device's 44V silicon-gate process rating.

How is charge injection specified for DG441DY, and why does it matter?

DG441DY guarantees ≤10pC maximum charge injection, measured with CL = 1nF and VD = ±10V under bipolar supply conditions. This parameter quantifies the net charge dumped onto the signal path during switching, directly causing voltage glitches in high-impedance nodes - especially critical in sample-and-hold circuits and multiplexed ADC front-ends where even 1mV errors degrade effective resolution.

Is DG441DY pin-compatible with older DG441 variants?

Yes, DG441DY is pin-compatible with all industry-standard DG441 variants in the 16-pin narrow SO package (e.g., DG441CY, DG441CJ), sharing identical pinout, footprint, and logic polarity. The "Y" suffix denotes −40°C to +85°C temperature grade and narrow SO packaging; no PCB layout changes are required when upgrading from commercial-grade DG441CY to industrial-grade DG441DY.