Analog Devices Inc./Maxim Integrated MAX4527CUA

Overview

MAX4527CUA from Maxim Integrated is a low-power, phase-reversal analog switch IC configured as a bridge of two normally open and two normally closed CMOS switches. It operates from +4.5V to +36V single supply or ±4.5V to ±18V dual supplies, delivers 175Ω max on-resistance with 8Ω matching, handles rail-to-rail analog signals (V− to V+), and consumes only 1µA at +25°C - ideal for chopper-stabilized amplifiers requiring precision polarity inversion.

For engineers reviewing the MAX4527CUA datasheet, MAX4527CUA pinout, MAX4527CUA application, or MAX4527CUA equivalent, this device is selected for low-leakage (0.5nA @ +25°C), guaranteed break-before-make timing (1–5ns), <100ns transition time with ±15V supplies, and 10pC max charge injection in precision DC/low-frequency phase-reversal circuits.

Technical Context

The MAX4527CUA implements a fully differential bridge topology where logic-controlled IN pin selects between two complementary signal paths: A→Y/B→X (IN = LOW) or A→X/B→Y (IN = HIGH). Its internal logic-level translator drives N- and P-channel MOSFET gates out-of-phase using V+ and V−, enabling true rail-to-rail analog conduction without ground reference.

Unlike discrete bridge implementations, it guarantees matched on-resistance flatness (12Ω typ), 2pC max charge-injection matching, and >65dB off-isolation at 1MHz - all within an 8-pin µMAX package. ESD protection exceeds 2kV per Method 3015.7, and leakage current flows exclusively to V+ or V− terminals, not across signal paths.

Key Specifications

Pinout & Package

MAX4527CUA is housed in an 8-pin µMAX package (2.1mm × 2.0mm, 0.65mm pitch), optimized for space-constrained PCB layouts while maintaining analog-digital isolation. Pin 1 is A (input), Pin 2 is B (input), Pin 3 is GND (digital ground reference only), Pin 4 is IN (TTL/CMOS control), Pin 5 is V− (negative supply or GND for single supply), Pin 6 is Y (output), Pin 7 is X (output), Pin 8 is V+ (positive supply).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4526CUA, MAX4527CUA trades speed for ultra-low power - making it optimal for portable or energy-sensitive chopper systems; versus ADG1419BRMZ, it provides bipolar operation, guaranteed break-before-make, and superior leakage performance essential for DC-critical applications.

Availability

MAX4527CUA is available at Aetrix Electronics and suitable for chopper-stabilized amplifiers, balanced modulators/demodulators, and data acquisition systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.

Supply support for MAX4527CUA 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 MAX4526/MAX4527 product line was engineered specifically for DC- and low-frequency phase-reversal tasks - delivering matched analog performance, rail-to-rail operation, and low-power logic in miniature packages for chopper amplifiers and balanced signal processing.

FAQ

What is the operating temperature range for MAX4527CUA?

The MAX4527CUA is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range aligns with its C-suffix designation and is validated across all key parameters including on-resistance, leakage current, and transition time. The device is not rated for extended industrial temperatures; for -40°C to +85°C operation, the MAX4527EUA variant must be used instead of MAX4527CUA.

Can MAX4527CUA operate from a single supply?

Yes, MAX4527CUA 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. All electrical specifications - including 175Ω max on-resistance and 0.5nA leakage - remain valid, though transition time increases slightly compared to ±15V dual-supply use. Local 0.1µF ceramic decoupling on V+ and GND is mandatory.

Does MAX4527CUA require external pull-up or pull-down resistors on the IN pin?

No, MAX4527CUA does not require external biasing on the IN pin. Its logic inputs have internally defined TTL/CMOS-compatible thresholds (0.8V to 2.4V) and sufficient noise margin for direct connection to microcontroller GPIOs or FPGA outputs. The input leakage is negligible (<100nA), so standard 3.3V or 5V logic drivers can drive IN without loading concerns - confirming that no external resistors are needed for proper MAX4527CUA operation.

How is charge injection specified for MAX4527CUA, and why does it matter?

MAX4527CUA specifies 10pC maximum charge injection - the net charge dumped onto the signal path when the switch turns off. This parameter directly impacts accuracy in capacitor-coupled or integrator-based circuits (e.g., chopper amplifiers), where injected charge causes voltage glitches. At 10pC into a 1nF load, the resulting step is just 10mV - a key reason MAX4527CUA is selected for sub-µV-offset applications requiring minimal settling error after switching.

Is MAX4527CUA pin-compatible with MAX4526CUA?

Yes, MAX4527CUA is fully pin-compatible with MAX4526CUA: identical 8-pin µMAX footprint, same pin functions (A, B, IN, GND, V−, Y, X, V+), and matching absolute maximum ratings. The only functional differences are internal - MAX4527CUA uses a slower logic translator to achieve 1µA supply current versus 1.5mA for MAX4526CUA - allowing direct substitution where lower speed is acceptable and power savings are prioritized.