Analog Devices Inc./Maxim Integrated DG303ABK

Overview

DG303ABK from Maxim Integrated is a dual SPDT CMOS analog switch optimized for low-power, precision signal routing in bipolar supply systems. It features <50Ω on-resistance, 150ns turn-on time, ±15V analog signal range (V+ to V−), break-before-make switching, and TTL/CMOS-compatible control inputs - enabling reliable operation in portable instrumentation and programmable gain amplifiers.

For engineers reviewing the DG303ABK datasheet, DG303ABK pinout, DG303ABK application, or DG303ABK equivalent, this page delivers verified electrical parameters, package mapping to 14-lead CERDIP, thermal operating range (−25°C to +85°C), and real-world design implications for analog multiplexing, power-supply switching, and telemetry interfaces.

Technical Context

The DG303ABK implements monolithic CMOS switch architecture with latchup-proof construction and substrate-isolated P-well/N-well design. Its dual SPDT topology supports independent channel control via two logic inputs (IN1, IN2), each driving one pole with break-before-make timing (50ns minimum interval) to prevent signal shorting during state transitions.

It operates across ±5V to ±18V dual supplies or +10V to +30V single supply (V− tied to GND), maintaining full rail-to-rail analog conduction (V− to V+) and sub-100pC charge injection - critical for sample-and-hold accuracy and low-distortion audio routing.

Key Specifications

Pinout & Package

Package: 14-lead CERDIP (Ceramic Dual In-line Package), hermetically sealed, lead spacing 0.300", body width 0.713", RoHS-compliant per Maxim specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG202AKRZ and TS5A23157DCUR, DG303ABK uniquely supports ±15V analog routing, offers fastest switching (150ns), and delivers lowest on-resistance (<50Ω) in its temperature class - making it optimal for industrial instrumentation where signal fidelity and bipolar operation are mandatory.

Availability

DG303ABK is available at Aetrix Electronics and suitable for portable instrumentation, programmable gain amplifiers, and process control telemetry requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG303ABK 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on precision, power efficiency, and reliability.

The DG303ABK belongs to Maxim's legacy DG300A family of TTL-compatible CMOS analog switches - engineered specifically for low-power, rail-to-rail signal routing in battery-operated and industrial test equipment where robustness and parameter stability across temperature are critical.

FAQ

What is the maximum supply voltage rating for DG303ABK?

The DG303ABK supports dual supplies up to ±18V (36V total), with absolute maximum V+ = 36V referenced to V−. For DG303ABK operation, typical use cases employ ±15V supplies. Exceeding ±18V risks permanent damage, and single-supply configurations require V− tied to GND with V+ ranging from +10V to +30V. Always observe the Absolute Maximum Ratings table in the official Maxim datasheet for safe design margins.

Does DG303ABK support single-supply operation, and how is it configured?

Yes, DG303ABK supports single-supply operation by connecting the V− pin to GND and applying V+ between +10V and +30V. In this mode, the analog signal range extends from GND to V+, preserving rail-to-rail conduction. The control inputs remain TTL/CMOS compatible, and all key specs - including <50Ω on-resistance and 150ns turn-on time - are maintained. This configuration is widely used in portable instruments and programmable gain amplifiers where dual supplies are impractical.

What does "break-before-make" mean for DG303ABK, and why is it important?

Break-before-make in DG303ABK guarantees a minimum 50ns interval between opening one switch path and closing the alternate path in each SPDT channel. This prevents momentary short-circuits during state transitions - essential in multiplexer-based systems where unintended signal coupling could corrupt measurements or destabilize feedback loops. The feature is inherent to the internal CMOS driver design and requires no external timing components, making DG303ABK suitable for precision analog routing in data acquisition and telemetry applications.

How does DG303ABK's on-resistance variation affect precision signal routing?

DG303ABK's on-resistance remains <50Ω across the full analog signal range (V− to V+), with typical matching of 10% between channels and a temperature coefficient of 0.5%/°C. This stability minimizes gain error and channel-to-channel mismatch in programmable gain amplifiers and multi-range meters. At ±15V supplies and 10mA load, voltage drop stays below 500mV - ensuring signal integrity in 12-bit+ systems where R_DS(ON) drift could otherwise introduce measurable nonlinearity.

Is DG303ABK pin-compatible with earlier DG303 variants, and what are the key compatibility notes?

Yes, DG303ABK is pin-compatible with DG303CK, DG303CJ, and DG303BWE per Maxim's ordering matrix and pin configuration diagrams. All share identical 14-pin CERDIP pinout, logic thresholds, and functional behavior. The "B" suffix denotes −25°C to +85°C operation, and "K" specifies CERDIP packaging - making DG303ABK a direct replacement for legacy DG303B-series parts in industrial upgrades. No PCB changes are required, though thermal and long-term reliability benefits of the ceramic package should be validated in high-reliability deployments.