Analog Devices Inc./Maxim Integrated DG305ACWE

Overview

DG305ACWE from Maxim Integrated is a single-pole double-throw (SPDT) CMOS analog switch with 100 Ω on-resistance, ±15 V analog signal range, and 10 nA leakage current at 25°C. It operates from dual supplies (±5 V to ±20 V), features break-before-make switching, and is used in precision instrumentation multiplexing and audio signal routing.

For engineers reviewing the DG305ACWE datasheet, DG305ACWE pinout, DG305ACWE application, or DG305ACWE equivalent, key selection criteria include on-resistance matching (max 5 Ω between channels), guaranteed break-before-make timing (min 20 ns), and SOIC-W package thermal performance for industrial temperature operation.

Technical Context

The DG305ACWE implements complementary MOSFET topology with matched P- and N-channel devices per switch path, enabling symmetrical conduction and low charge injection (20 pC typical). Its control logic accepts TTL/CMOS-compatible inputs referenced to V_SS, and internal level-shifting ensures full analog swing across the supply rails.

Designed for bidirectional signal handling, the DG305ACWE maintains channel isolation of –75 dB at 1 MHz and exhibits <0.01% total harmonic distortion at 1 kHz with 10 V_PP output into 600 Ω - critical for audio and data acquisition systems requiring minimal signal corruption.

Key Specifications

Pinout & Package

Package: 16-pin SOIC-Wide (SOICW), 7.6 mm × 10.3 mm body, 1.27 mm pitch, JEDEC MS-013 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX305CPE+ and ADG1419BRUZ, the DG305ACWE uniquely balances wide supply tolerance (±20 V), SOIC-W thermal efficiency, and guaranteed break-before-make timing - making it optimal for industrial DAQ and legacy analog infrastructure upgrades.

Availability

DG305ACWE is available at Aetrix Electronics and suitable for instrumentation multiplexing, audio signal routing, data acquisition front-ends, and industrial PLC analog I/O requiring stable component supply and long-term manufacturability.

Supply support for DG305ACWE 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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.

The DG305ACWE belongs to Maxim's legacy CMOS analog switch family, engineered for high-fidelity signal routing in environments demanding wide supply range, low leakage, and robust channel isolation.

FAQ

What is the maximum supply voltage rating for the DG305ACWE?

The DG305ACWE supports dual supplies from ±5 V up to ±20 V. Operation at ±20 V is fully specified in the datasheet, including R_ON, leakage, and switching timing. Exceeding ±20 V risks permanent damage. The DG305ACWE must maintain proper decoupling and thermal management when operated near its absolute maximum ratings.

Does the DG305ACWE require external pull-up or pull-down resistors on its control inputs?

No - the DG305ACWE control inputs (IN1, IN2, EN1, EN2) are TTL/CMOS-compatible with internal level-shifting circuitry referenced to V_SS. They accept logic-high thresholds as low as 2.4 V and logic-low thresholds up to 0.8 V across the full temperature range. External resistors are unnecessary unless implementing specific noise immunity or fail-safe states outside normal operation.

Can the DG305ACWE be used in bidirectional signal paths?

Yes - the DG305ACWE is fully bidirectional: analog signals may flow equally well from COM to NO/NC or vice versa. Its complementary MOSFET structure ensures symmetrical on-resistance and capacitance. This makes the DG305ACWE suitable for both input multiplexing and output routing in systems like automated test equipment and reconfigurable signal chains.

What is the thermal resistance (θ_JA) of the DG305ACWE in its SOIC-W package?

The DG305ACWE in the 16-pin SOIC-W package has a junction-to-ambient thermal resistance (θ_JA) of 55°C/W under standard JEDEC test conditions (2S2P board). This value assumes 1 in² copper pour on the component side. Actual θ_JA improves with additional PCB copper area or thermal vias - critical for sustained operation at ±18 V or ±20 V supplies.

How does the DG305ACWE handle charge injection during switching?

The DG305ACWE specifies 20 pC typical charge injection, resulting from gate capacitance imbalance during turn-off. This low value minimizes voltage glitches on high-impedance nodes - especially important in sample-and-hold or integrator circuits. Layout best practices (e.g., guard rings, minimized trace capacitance) further reduce effective glitch magnitude in the DG305ACWE application.