Analog Devices Inc./Maxim Integrated MAX4622CSE+

Overview

The MAX4622CSE+ from Maxim Integrated is a precision dual SPDT analog switch with two normally closed (NC) and two normally open (NO) poles, designed for low-distortion signal routing in test equipment and communication systems. It delivers 5Ω max on-resistance, guaranteed 0.5Ω max R_ON match between channels, rail-to-rail analog signal handling (±18V bipolar or +36V single supply), and break-before-make switching operation.

For engineers reviewing the MAX4622CSE+ datasheet, MAX4622CSE+ pinout, MAX4622CSE+ application, or MAX4622CSE+ equivalent, key selection criteria include guaranteed R_ON matching, sub-200ns turn-off time, <5nA off-leakage at +85°C, CMOS/TTL logic compatibility, and SOIC-16 package compatibility with legacy DG403 replacements.

Technical Context

The MAX4622CSE+ implements monolithic CMOS switch architecture with integrated protection diodes and logic-level translation via VL pin. Its dual SPDT topology supports independent control of two switch pairs, each with guaranteed break-before-make timing (t_D = 75ns typ) to prevent signal shorting during state transitions.

It operates across wide supply ranges: ±4.5V to ±18V bipolar or +4.5V to +36V single supply, maintaining rail-to-rail analog signal swing (V_COM from V− to V+) and low charge injection (45pC typ) critical for data-acquisition front-ends and audio routing where signal integrity is paramount.

Key Specifications

Pinout & Package

MAX4622CSE+ is housed in a 16-pin narrow SOIC (SO/DIP) package with 1.27mm pitch, JEDEC MS-012AC compliant, 10.3mm × 7.5mm body size, and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRUZ and TS5A3157DCKR, the MAX4622CSE+ uniquely combines dual SPDT topology, guaranteed break-before-make, bipolar/single supply flexibility, and <5nA leakage at +85°C-making it the only option qualified for high-precision, high-reliability, wide-temperature analog routing in military and industrial systems.

Availability

MAX4622CSE+ is available at Aetrix Electronics and suitable for test equipment, avionics signal conditioning, and audio-signal routing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4622CSE+ 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, automotive, communications, and computing applications.

The MAX462x family targets high-fidelity analog switching in mission-critical systems-emphasizing R_ON matching, low leakage, and robust supply flexibility to replace mechanical relays and legacy analog switches.

FAQ

What is the maximum allowable supply voltage difference between V+ and V− for the MAX4622CSE+?

The MAX4622CSE+ specifies an absolute maximum rating of +44V for the voltage difference between V+ and V−. Exceeding this limit risks permanent damage due to internal junction breakdown. Designers must ensure that |V+ − V−| ≤ 44V under all operating and transient conditions, including power-up sequencing and fault states. This constraint applies regardless of whether the device is operated in bipolar or single-supply mode.

Does the MAX4622CSE+ require external pull-up resistors on its logic inputs (IN1, IN2)?

No, the MAX4622CSE+ does not require external pull-up resistors on IN1 or IN2. Its logic inputs are TTL/CMOS compatible with guaranteed thresholds (V_INH ≥ +2.4V, V_INL ≤ +0.8V) and low input current (<0.5µA over temperature). Direct connection to FPGA GPIO, MCU outputs, or logic gates is sufficient. Pull-ups are unnecessary unless system-level noise immunity or default-state biasing is required beyond the device's native specifications.

Can the MAX4622CSE+ operate with V+ = +12V and V− = GND (i.e., single-supply mode with grounded negative rail)?

Yes, the MAX4622CSE+ supports true single-supply operation with V− tied to GND and V+ ranging from +4.5V to +36V. In this configuration, analog signals on COM, NO, and NC pins may swing from GND to V+, maintaining rail-to-rail capability. The device retains full functionality-including guaranteed R_ON match, break-before-make timing, and <5nA leakage at +85°C-as verified in the Single-Supply Electrical Characteristics table of the datasheet.

What is the purpose of the VL pin on the MAX4622CSE+, and how should it be decoupled?

VL sets the logic threshold reference for IN1 and IN2 inputs and must be decoupled with a 0.1µF ceramic capacitor placed as close as possible to pin 13 (VL) and GND. It is typically tied to +5V but may be adjusted to match host controller logic levels. Improper decoupling causes logic noise coupling into analog paths, degrading off-isolation and increasing crosstalk. The capacitor must be low-ESR and rated for the system's operating temperature range.

Is the MAX4622CSE+ pin-compatible with the DG403, and what performance improvements does it offer?

Yes, the MAX4622CSE+ is explicitly specified as a pin-compatible replacement for the DG403. It improves on-resistance (5Ω max vs. 45Ω max), R_ON matching (0.5Ω max vs. unspecified), leakage (<5nA at +85°C vs. 100nA), and switching speed (t_OFF <200ns vs. 300ns). These enhancements enable higher accuracy, lower distortion, and faster throughput in reed-relay-replacement and automatic-test applications without PCB layout changes.