Analog Devices Inc./Maxim Integrated MAX4503ESA

Overview

MAX4503ESA from Maxim Integrated is a low-voltage, dual-supply, normally-open (NO) SPST CMOS analog switch in 8-pin SO package. It operates from ±1V to ±6V supplies, delivers rail-to-rail signal switching, guarantees 250Ω on-resistance at ±5V, and exhibits only 1nA off-leakage at +25°C - enabling precision signal routing in battery-powered instrumentation.

For engineers reviewing the MAX4503ESA datasheet, MAX4503ESA pinout, MAX4503ESA application, or MAX4503ESA equivalent, this device is selected for low-leakage, dual-supply analog switching where supply-referenced logic compatibility, sub-150ns turn-on time, and <10pC charge injection are critical design requirements.

Technical Context

The MAX4503ESA uses a fully differential CMOS switch architecture with no ground pin, relying solely on V+ and V− to define analog signal range and bias internal logic-level translators. Its input stage references logic thresholds directly to V+, enabling CMOS-compatible control across the full ±1V to ±6V dual-supply range.

Each switch path supports bidirectional rail-to-rail analog signals up to ±6V, with leakage currents isolated per terminal via ESD diodes to V+ and V−. Charge injection is minimized to 10pC max through matched transistor design and layout symmetry, critical for sample-and-hold and multiplexer applications.

Key Specifications

Pinout & Package

MAX4503ESA is housed in an 8-pin SOIC (SO) package with standard .150" body width and 1.27mm pitch. Pin 1 is COM (common), Pin 2 is NO (normally open), Pin 3 is V−, Pin 4 is IN (digital control), Pin 5 is V+; Pins 6–8 are not internally connected (N.C.).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4503CUK, the MAX4503ESA offers extended -40°C to +85°C operation and SOIC packaging for easier handling and thermal dissipation; versus ADG1419BRMZ, it provides native dual-supply capability and groundless logic interface - essential for compact, battery-efficient bipolar-signal systems.

Availability

MAX4503ESA is available at Aetrix Electronics and suitable for battery-operated equipment, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply across industrial temperature ranges.

Supply support for MAX4503ESA 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 applications.

The MAX4503ESA belongs to Maxim's low-voltage analog switch product line, engineered specifically for rail-to-rail signal routing in dual-supply, ground-free systems where leakage, charge injection, and supply flexibility are critical.

FAQ

What is the maximum dual-supply voltage range supported by the MAX4503ESA?

The MAX4503ESA supports continuous dual-supply operation from ±1V up to ±6V. This means V+ can be as high as +6V and V− as low as −6V, with the analog signal range extending rail-to-rail between those supplies. Operation outside this range violates absolute maximum ratings and may cause permanent damage. The MAX4503ESA maintains guaranteed performance across this full range, including specified on-resistance and leakage parameters at both extremes.

Does the MAX4503ESA require a ground connection for proper operation?

No, the MAX4503ESA does not require a ground connection. It operates using only V+ and V− supply pins, with logic inputs referenced internally to V+. This groundless architecture simplifies system design in floating or split-supply environments. All leakage paths route to V+ or V−, and the digital input functions correctly without any external ground reference - a key differentiator confirmed in the MAX4503ESA datasheet's Applications Information section.

What is the guaranteed on-resistance of the MAX4503ESA at ±3V supplies?

The MAX4503ESA guarantees a maximum on-resistance of 400Ω at ±3V supplies (V+ = +3.3V, V− = −3.3V), measured at TA = +25°C with VCOM = ±1.5V and ICOM = 0.1mA. This value is explicitly specified in the "ELECTRICAL CHARACTERISTICS-±3V Supply" table of the MAX4503ESA datasheet and reflects higher R_ON due to reduced gate overdrive compared to ±5V operation.

Can the MAX4503ESA be used in single-supply configurations?

No - the MAX4503ESA is designed exclusively for dual-supply operation. For single-supply applications, Maxim specifies the pin-for-pin compatible MAX4501/MAX4502 series. Attempting to operate the MAX4503ESA with only V+ and GND (or only V− and GND) violates its internal biasing scheme and will result in undefined switching behavior, excessive leakage, or potential damage. The MAX4503ESA's logic translator and ESD protection rely on the differential V+/V− relationship.

How is the logic input of the MAX4503ESA compatible with CMOS levels without a ground pin?

The MAX4503ESA implements an internal voltage-reference architecture where the logic threshold is derived from V+, not ground. Specifically, VIH is defined as (V+) − 1.5V and VIL as (V+) − 3.5V - meaning a 'HIGH' is recognized when the input exceeds V+ − 1.5V, regardless of V−. This allows direct interfacing with CMOS outputs powered from the same V+ rail, eliminating level shifters. This behavior is verified in the MAX4503ESA's Electrical Characteristics tables and Applications Information section.