Analog Devices Inc./Maxim Integrated MAX4514ESA+

Overview

The MAX4514ESA+ from Maxim Integrated is a single-pole/single-throw (SPST), normally open (NO), CMOS analog switch optimized for low-voltage, rail-to-rail signal routing. It operates from a single +2V to +12V supply, delivers 20Ω on-resistance at +5V, supports ≤1nA off-leakage at +25°C, and switches in 150ns turn-on time - enabling precision signal path control in portable audio and battery-powered data acquisition systems.

For engineers reviewing the MAX4514ESA+ datasheet, MAX4514ESA+ pinout, MAX4514ESA+ application, or MAX4514ESA+ equivalent, key selection criteria include guaranteed on-resistance flatness (≤3Ω), charge injection (10pC), TTL/CMOS logic compatibility at +5V, and SOT23-5 package suitability for space-constrained PCB layouts.

Technical Context

This SPST analog switch uses complementary MOSFET topology with integrated level translators to drive gate voltages across the full V+–GND range. Its break-before-make timing (t_ON > t_OFF at +5V) prevents signal shorting during state transitions, and internal ESD diodes clamp analog inputs to V+ and GND - requiring external protection only when signals exceed absolute maximum ratings.

All digital inputs are referenced to GND and feature fixed 0.8V/2.4V logic thresholds at +5V supply, ensuring robust interface with microcontroller GPIOs. Analog signal paths (NO, COM, NC) are bidirectional and fully isolated from power rails except through reverse-biased ESD diodes - making leakage current highly dependent on instantaneous analog voltage relative to V+ and GND.

Key Specifications

Pinout & Package

The MAX4514ESA+ is housed in a 5-pin SOT23-5 package with exposed pad (not electrically connected). Pin 1 = NO (normally open switch terminal), Pin 2 = IN (digital control input), Pin 3 = GND (ground reference), Pin 4 = COM (common analog terminal), Pin 5 = V+ (positive supply).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4514CSA+, the MAX4514ESA+ extends operational temperature to −40°C and improves long-term reliability in thermal cycling environments; compared with ADG801BRMZ, it trades 19.7Ω higher R_ON for 15pC lower charge injection and +6.5V wider supply headroom - making it more robust for mixed-signal systems spanning battery, USB, and legacy industrial rails.

Availability

MAX4514ESA+ is available at Aetrix Electronics and suitable for battery-operated equipment, portable audio signal routing, and low-voltage data-acquisition systems requiring stable component supply across industrial temperature ranges.

Supply support for MAX4514ESA+ 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, communications, and consumer applications.

The MAX4514ESA+ belongs to Maxim's low-voltage analog switch product line, engineered specifically for rail-to-rail signal integrity, ultra-low leakage, and seamless integration into space- and power-constrained portable electronics.

FAQ

What is the maximum allowable analog signal voltage range for the MAX4514ESA+?

The MAX4514ESA+ supports rail-to-rail analog signals from 0V to V+. When V+ = +5V, the analog input/output range is 0V to +5V; when V+ = +12V, it extends to 0V to +12V. Exceeding these limits risks forward-biasing internal ESD diodes, potentially causing excessive leakage or damage. The device does not support negative analog voltages unless a negative supply is applied to V+, which is outside its specified operating conditions.

Does the MAX4514ESA+ require external pull-up or pull-down resistors on its IN pin?

No, the MAX4514ESA+ does not require external pull-up or pull-down resistors on the IN pin. Its digital input has defined TTL/CMOS-compatible thresholds (0.8V low, 2.4V high at +5V supply) and draws ≤1µA input current. Driving IN directly from a microcontroller GPIO or logic gate output is sufficient. External resistors are only needed if the driving source is high-impedance or subject to floating states during power-up/down sequences.

Can the MAX4514ESA+ be used with a +3.3V supply, and what are the resulting performance trade-offs?

Yes, the MAX4514ESA+ is fully specified for +3.3V operation (within its +2V to +12V range). At +3.3V, R_ON increases to 50Ω max (vs. 20Ω at +5V), and off-leakage remains ≤1nA at +25°C. Switching speed slows slightly (t_ON ≈ 240ns), but logic compatibility is preserved. This makes the MAX4514ESA+ viable for +3.3V systems where moderate R_ON is acceptable - such as non-critical sensor multiplexing or audio routing where THD requirements are relaxed.

How does charge injection in the MAX4514ESA+ affect ADC sampling accuracy, and how can it be mitigated?

Charge injection (10pC typical) in the MAX4514ESA+ causes a voltage glitch ∆V = Q/C_L on capacitive loads like ADC sample-and-hold capacitors. For a 1000pF hold capacitor, this yields a 10mV step - potentially introducing offset error. Mitigation includes using smaller hold capacitance (e.g., 100pF → 100mV glitch, but faster settling), adding a small series resistor to limit peak current, or synchronizing switch closure with ADC sampling edges to treat the glitch as deterministic error. The MAX4514ESA+'s low and consistent charge injection enables effective calibration in precision systems.

Is the SOT23-5 package of the MAX4514ESA+ pin-compatible with other Maxim analog switches like the MAX4515ESA+?

Yes, the MAX4514ESA+ and MAX4515ESA+ share identical SOT23-5 pinouts: Pin 1 = NO/NC (functionally swapped), Pin 2 = IN, Pin 3 = GND, Pin 4 = COM, Pin 5 = V+. However, they are functionally inverse - MAX4514ESA+ is normally open (ON when IN = HIGH), while MAX4515ESA+ is normally closed (OFF when IN = HIGH). No PCB layout change is needed for substitution, but firmware logic must invert the control signal to maintain equivalent behavior.