Analog Devices Inc./Maxim Integrated MAX4526CSA+T

Overview

MAX4526CSA+T from Maxim Integrated is a high-speed phase-reversal analog switch IC configured as a bridge of two normally open and two normally closed CMOS switches, optimized for chopper-stabilized amplifiers. It operates from ±4.5V to ±18V dual supplies or +4.5V to +36V single supply, delivers 175Ω max on-resistance with 8Ω matching, handles rail-to-rail analog signals (V− to V+), and features guaranteed break-before-make switching. Its 10pC max charge injection and <100ns transition time support precision DC/low-frequency signal inversion in instrumentation.

For engineers reviewing the MAX4526CSA+T datasheet, MAX4526CSA+T pinout, MAX4526CSA+T application, or MAX4526CSA+T equivalent, key selection criteria include on-resistance matching (≤8Ω), charge-injection performance (≤10pC), rail-to-rail signal handling, TTL/CMOS-compatible logic thresholds (0.8V–2.4V), and guaranteed break-before-make timing (1–5ns) in phase-reversal topologies.

Technical Context

The MAX4526CSA+T implements a fully integrated bridge configuration with four analog terminals (A, B, X, Y) and one digital control input (IN), enabling polarity reversal by swapping signal paths under logic control. Its internal architecture uses complementary N- and P-channel MOSFETs driven by out-of-phase gate signals derived from V+ and V−, eliminating ground reference for analog paths.

It features dedicated ESD protection diodes on all analog pins referenced to V+ and V− (not GND), enabling safe operation with bipolar supplies down to V− = −18V and supporting logic inputs that swing below GND. The device is factory-characterized at ±15V, with on-resistance flatness ≤12Ω and leakage ≤0.5nA at +25°C - critical for chopper amplifier offset stability.

Key Specifications

Pinout & Package

MAX4526CSA+T is housed in an 8-pin µMAX package (3.05mm × 3.05mm, 0.65mm pitch), specified for 0°C to +70°C operation. The package provides compact layout, thermal efficiency (330mW @ +70°C), and isolation between analog and digital domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4526CSA+T, MAX4527CSA+T trades speed for 1000× lower supply current, while ADG1419BRMZ offers lower RON but requires external circuitry to achieve phase reversal - making MAX4526CSA+T the optimal choice for integrated, high-speed, rail-to-rail polarity inversion.

Availability

MAX4526CSA+T is available at Aetrix Electronics and suitable for chopper-stabilized amplifiers, balanced modulators/demodulators, and precision data acquisition systems requiring stable component supply, long-term manufacturability, and guaranteed parametric performance over temperature.

Supply support for MAX4526CSA+T 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 - emphasizing low-noise, high-accuracy, and robust reliability.

The MAX4526/MAX4527 product line was engineered specifically for DC and low-frequency phase-reversal tasks including chopper amplifiers and self-calibrating systems, prioritizing matched on-resistance, ultra-low charge injection, and rail-to-rail signal integrity.

FAQ

What is the operating temperature range for MAX4526CSA+T?

The MAX4526CSA+T is rated for 0°C to +70°C ambient operation, as indicated by the 'C' grade suffix in its ordering code. This commercial-grade specification ensures stable performance in office, laboratory, and non-extreme industrial environments. All electrical parameters - including on-resistance, leakage, and transition time - are guaranteed across this full range, with typical values measured at +25°C. For extended temperature operation, consider the -40°C to +85°C 'E' grade variant MAX4526ESA+T.

Does MAX4526CSA+T support single-supply operation?

Yes, MAX4526CSA+T supports single-supply operation from +4.5V to +36V by connecting V− to GND. In this configuration, analog signals swing from 0V to V+, preserving rail-to-rail capability. The device retains TTL/CMOS logic compatibility, guaranteed break-before-make timing, and 10pC max charge injection. However, bipolar supply operation (±4.5V to ±18V) is recommended for optimal AC symmetry and carrier suppression in modulator applications.

How does the break-before-make feature work in MAX4526CSA+T?

The MAX4526CSA+T guarantees a minimum 1ns and maximum 5ns break interval between opening one switch path and closing the alternate path during IN transitions. This prevents momentary short-circuiting of A/B inputs or X/Y outputs, which could cause signal glitches or latch-up in feedback-sensitive circuits like chopper amplifiers. The timing is inherent to the internal logic translator and switch driver design - no external timing components are required to achieve this behavior.

Can MAX4526CSA+T handle signals beyond the supply rails?

No - MAX4526CSA+T analog terminals (A, B, X, Y) are clamped by internal ESD diodes to V+ and V−. Signals exceeding V+ or falling below V− will forward-bias these diodes, potentially causing excessive current flow (>20mA continuous) and damage. The absolute maximum ratings specify (V− − 0.3V) to (V+ + 0.3V) for all analog pins. To protect against overvoltage, external series resistors or clamp diodes referenced to V+/V− must be used.

What is the significance of charge-injection matching in MAX4526CSA+T?

MAX4526CSA+T specifies 2pC maximum charge-injection matching between its A and B switch paths. This tight matching ensures nearly identical voltage glitches occur at both inputs during switching, preserving common-mode balance in differential circuits. In chopper amplifiers or balanced modulators, unmatched charge injection would convert to differential error - degrading offset cancellation and carrier suppression. The 2pC spec directly enables >65dB common-mode rejection in well-designed layouts.