Analog Devices Inc./Maxim Integrated DG419LDJ+

Overview

DG419LDJ+ from Maxim Integrated is a precision CMOS single-pole/double-throw (SPDT) analog switch with 35Ω max on-resistance, 3Ω max R_ON matching between NC/NO channels, and rail-to-rail analog signal handling from ±4.5V to ±20V or +9V to +36V. It features +3V logic-compatible digital inputs (VIH = 2.0V, VIL = 0.8V), <5nA off-leakage at +85°C, and sub-185ns switching times - used in audio routing, test equipment, and battery-operated communications systems.

For engineers reviewing the DG419LDJ+ datasheet, DG419LDJ+ pinout, DG419LDJ+ application, or DG419LDJ+ equivalent, key selection criteria include guaranteed R_ON flatness (≤4Ω), break-before-make timing (≤1ns), charge injection (≤15pC), and extended temperature operation (–40°C to +85°C) in an 8-pin plastic DIP package.

Technical Context

The DG419LDJ+ implements a fully differential CMOS transmission gate architecture enabling bidirectional analog conduction with matched channel characteristics. Its logic interface operates independently of supply sequencing - eliminating need for V_L bias or external protection diodes required by legacy DG419 variants.

It supports dual-supply (±4.5V to ±20V) and single-supply (+9V to +36V) operation while maintaining guaranteed R_ON matching (≤3Ω) and flatness (≤4Ω) across –40°C to +85°C. Off-isolation exceeds –90dB at 1MHz, and crosstalk remains below –86dB under matched 50Ω load conditions.

Key Specifications

Pinout & Package

Package: 8-pin plastic DIP (0.300" wide), JEDEC MS-001, rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4619EPA+ and ADG1419BRZ, DG419LDJ+ uniquely balances +3V logic compatibility, 8-pin DIP footprint, guaranteed R_ON matching, and extended temperature performance - making it optimal for drop-in upgrades of legacy DG419-based industrial and telecom designs.

Availability

DG419LDJ+ is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and battery-operated communications systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DG419LDJ+ 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 DG419L family was designed as a pin-compatible, enhanced-reliability upgrade to the industry-standard DG419, delivering improved R_ON matching, sequencing-free operation, and tighter leakage specs for mission-critical analog signal routing.

FAQ

What is the maximum analog signal voltage range supported by DG419LDJ+?

DG419LDJ+ supports analog signals from V− to V+ across its full specified supply range: ±4.5V to ±20V (dual supply) or +9V to +36V (single supply). This rail-to-rail capability allows full utilization of the supply rails without clipping, enabling direct interfacing with sensors, DACs, and ADCs operating at these voltages. The absolute maximum ratings limit VCOM, NC, and NO to (V− − 0.3V) to (V+ + 0.3V).

Does DG419LDJ+ require specific power-supply sequencing during startup?

No, DG419LDJ+ does not require controlled power-supply sequencing. Unlike legacy DG419 devices, it eliminates the need for a separate V_L pin and supports arbitrary ramp order for V+, V−, and GND. This sequencing-free operation prevents latch-up and simplifies power design in systems with multiple independent rails - a key reliability enhancement confirmed in the Applications Information section of the DG419L datasheet.

What is the guaranteed R_ON matching specification for DG419LDJ+ and why does it matter?

DG419LDJ+ guarantees R_ON matching of ≤3Ω between its NC and NO channels under all operating conditions (–40°C to +85°C, full supply range). This tight matching ensures identical gain and offset errors when routing differential signals or performing ratiometric measurements - critical in precision instrumentation, automatic test equipment, and calibration systems where channel-to-channel consistency directly impacts measurement accuracy.

Can DG419LDJ+ be used with +3.3V logic controllers without level shifters?

Yes, DG419LDJ+ is explicitly +3V logic-compatible: its VIH threshold is 2.0V (min) and VIL is 0.8V (max), ensuring robust recognition of standard 3.3V CMOS/TTL logic levels. No external level-shifting circuitry is needed when driving the IN pin from microcontrollers, FPGAs, or ASICs operating at 3.3V, reducing BOM count and board space in compact designs.

What is the off-leakage current of DG419LDJ+ at elevated temperature?

DG419LDJ+ guarantees NC/NO off-leakage current of less than ±5nA at +85°C, as verified by 100% production testing at maximum rated hot temperature. This ultra-low leakage prevents signal degradation in high-impedance nodes - such as those found in piezoelectric sensor interfaces, electrometer-grade amplifiers, and long-duration sample-and-hold circuits - where even sub-nanoampere currents can cause measurable drift or settling errors.