Analog Devices Inc./Maxim Integrated MAX305ESE

Overview

The MAX305ESE from Maxim Integrated is a precision dual SPST analog switch with normally open (NO) configuration, designed for high-accuracy signal routing in bipolar or single-supply systems. It delivers <35Ω max on-resistance, <2Ω channel-to-channel match, <15pC charge injection, <6nA off-leakage at +85°C, and sub-150ns turn-on time - enabling low-distortion switching in test equipment and military radios.

For engineers reviewing the MAX305ESE datasheet, MAX305ESE pinout, MAX305ESE application, or MAX305ESE equivalent, key selection criteria include rail-to-rail analog signal handling (±15V), guaranteed on-resistance flatness (Δ3Ω max), CMOS/TTL logic compatibility, and 16-pin narrow SO package suitability for space-constrained industrial PCBs.

Technical Context

The MAX305ESE implements two independent SPST switches fabricated using Maxim's silicon-gate process, supporting ±4.5V to ±20V bipolar supplies or +10V to +30V single supply while maintaining CMOS-input compatibility. Its architecture guarantees matched on-resistance (<2Ω) and flat on-resistance (Δ3Ω max) across the full analog range (V– to V+).

Charge injection is tightly controlled at ≤15pC, and off-isolation exceeds 72dB at 1MHz. The device features internal substrate connection to V+, enabling robust rail-to-rail analog signal switching without external clamping diodes when power sequencing is observed.

Key Specifications

Pinout & Package

MAX305ESE is housed in a 16-pin narrow SOIC (S16-2) package with 1.27mm pitch, JEDEC MS-012 compliant, and rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A23159DCKR, the MAX305ESE uniquely supports true bipolar operation (±20V), guarantees channel matching (<2Ω), and maintains specified performance from –40°C to +85°C - making it the only option among the three qualified for precision military and industrial analog signal routing.

Availability

MAX305ESE is available at Aetrix Electronics and suitable for test equipment multiplexing, military radio signal routing, heads-up display calibration, and battery-operated sensor interface applications requiring stable component supply across extended temperature ranges.

Supply support for MAX305ESE 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 demanding industrial, automotive, and communications applications.

The MAX305ESE belongs to Maxim's precision analog switch product line, engineered specifically for high-accuracy, low-distortion signal routing in systems requiring rail-to-rail capability, tight channel matching, and robust operation across –40°C to +85°C.

FAQ

What is the maximum analog signal voltage range supported by the MAX305ESE?

The MAX305ESE supports analog signals from V– to V+, with absolute maximum ratings of ±44V across V+ and V–. When operated with ±15V supplies, it handles rail-to-rail signals from –15V to +15V without clipping or distortion - a key requirement for precision instrumentation and military radio front-ends where full dynamic range utilization is essential. This capability is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet.

Does the MAX305ESE require separate logic and analog supplies?

Yes, the MAX305ESE requires both VL (logic supply) and V+/V– (analog supplies). VL must be +5V for TTL compatibility; if tied to V+, it enables CMOS-level input thresholds. The analog supplies (V+/V–) define the signal range and can operate from ±4.5V to ±20V or as a single +10V to +30V rail. This dual-supply architecture isolates logic noise from sensitive analog paths - a design feature explicitly documented in the Applications Information section.

What is the guaranteed on-resistance match between the two channels of the MAX305ESE?

The MAX305ESE guarantees on-resistance match between its two SPST channels to within 2Ω over the full operating temperature range (–40°C to +85°C), as specified in the Electrical Characteristics table under "On-Resistance Match Between Channels". This parameter is measured at V+ = 15V, V– = –15V, and is critical for differential signal integrity and ratiometric measurement accuracy in precision applications like sensor multiplexing and calibration systems.

Can the MAX305ESE be used in a single-supply configuration?

Yes, the MAX305ESE supports single-supply operation from +10V to +30V, with analog signals referenced to V– (ground). In this mode, it retains rail-to-rail capability - e.g., with V+ = +15V and V– = 0V, signals from 0V to +15V are fully supported. This configuration is validated in the General Description and Operating Temperature Ranges sections, and is commonly deployed in battery-powered test gear and portable instrumentation where bipolar supplies are impractical.

What is the maximum allowable charge injection for the MAX305ESE, and why does it matter?

The MAX305ESE guarantees charge injection of ≤15pC, as stated in the Features list and Electrical Characteristics table. This low value minimizes voltage glitches at the output during switching transitions - especially critical in sample-and-hold circuits, ADC front-ends, and calibration reference switching where even sub-millivolt errors degrade measurement accuracy. The specification is tested per Figure 4 in the datasheet under defined conditions (R_GEN = 0Ω, C_L = 10nF).