Analog Devices Inc./Maxim Integrated MAX4528CPA+

Overview

MAX4528CPA+ from Maxim Integrated is a low-voltage, CMOS phase-reversal analog switch configured as a 4-terminal bridge with two normally open and two normally closed paths. It operates from +2.7V to +12V single supply or ±2.7V to ±6V dual supplies, delivers ≤110Ω on-resistance (±5V), <100ns transition time, and 5pC max charge injection-enabling precision chopper-stabilized amplifiers and balanced modulators.

For engineers reviewing the MAX4528CPA+ datasheet, MAX4528CPA+ pinout, MAX4528CPA+ application, or MAX4528CPA+ equivalent, key selection criteria include rail-to-rail signal handling (V− to V+), matched on-resistance (≤7Ω), TTL/CMOS-compatible logic thresholds (0.8V–2.4V), leakage current (0.5nA at +25°C), and 8-pin DIP package compatibility for legacy test equipment and industrial signal routing.

Technical Context

The MAX4528CPA+ implements a fully integrated bridge topology with four bidirectional analog terminals (A, B, X, Y) and one digital control input (IN), enabling true polarity inversion without external components. Its internal N- and P-channel MOSFETs are driven out-of-phase by logic-level translators referenced to V+ and V−, ensuring symmetrical conduction and minimal DC offset.

It supports both single-supply (V− = GND) and bipolar operation, with ESD protection (>2kV per Method 3015.7), rail-to-rail analog voltage range (V− to V+), and guaranteed performance across 0°C to +70°C. Leakage current flows exclusively to V+ or V− via internal ESD diodes-not through GND-preserving analog signal integrity in isolated systems.

Key Specifications

Pinout & Package

MAX4528CPA+ uses an 8-pin plastic DIP package (0.300" wide), with pins arranged in dual-in-line configuration and substrate internally tied to V+. Pin functions are electrically symmetric for A/B/X/Y, but optimal AC balance is achieved when A/B serve as inputs and X/Y as outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4528CPA+, MAX4526CPA+ offers simpler control but no true bridge functionality, while ADG1419BRZ provides lower on-resistance and higher voltage rating at the cost of external implementation complexity, degraded AC symmetry, and higher total system leakage.

Availability

MAX4528CPA+ is available at Aetrix Electronics and suitable for chopper-stabilized amplifiers, balanced modulators/demodulators, and data acquisition systems requiring stable component supply, long-term obsolescence management, and traceable sourcing for industrial and test-equipment OEMs.

Supply support for MAX4528CPA+ 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, with emphasis on low-noise, low-power, and high-reliability performance.

The MAX4528CPA+ belongs to Maxim's low-voltage analog switch product line, engineered specifically for DC and low-frequency phase-reversal tasks including chopper amplifiers, self-calibrating systems, and balanced modulation-where monolithic bridge integration, rail-to-rail operation, and matched characteristics are critical.

FAQ

What is the operating temperature range for MAX4528CPA+?

The MAX4528CPA+ is rated for 0°C to +70°C ambient operation, matching the 'C' grade designation in its part number suffix. This range covers commercial and industrial environments where thermal management is controlled, and it is validated across all electrical specifications including on-resistance, leakage, and transition time. The MAX4528CPA+ does not support extended temperature grades like the -40°C to +85°C 'E' variants.

Can MAX4528CPA+ operate from a single +3.3V supply?

Yes, MAX4528CPA+ supports +2.7V to +12V single-supply operation. With V− tied to GND and V+ = +3.3V, it delivers ≤900Ω on-resistance, 400ns transition time, and 5pC max charge injection. Logic thresholds adjust automatically (VINL ≈ 0.6V, VINH ≈ 0.9V), maintaining compatibility with 3.3V CMOS logic. Performance remains fully specified per the +3V Electrical Characteristics table.

How does MAX4528CPA+ achieve phase reversal without external components?

MAX4528CPA+ integrates a monolithic bridge with four analog terminals (A, B, X, Y) and one logic input (IN). When IN is LOW, A connects to Y and B connects to X; when IN is HIGH, A connects to X and B connects to Y - physically swapping signal paths to invert polarity. This eliminates discrete MOSFET bridges, reducing layout asymmetry, parasitic capacitance mismatch, and charge injection imbalance inherent in external implementations.

Is MAX4528CPA+ pin-compatible with other packages in the MAX4528 family?

Yes, MAX4528CPA+ (8-pin DIP) shares identical pinout and functionality with MAX4528CSA+ (8-pin SO) and MAX4528CUA+ (8-pin µMAX). All three variants use the same A/B/X/Y/V+/V−/GND/IN mapping and electrical specifications. Only mechanical dimensions and thermal characteristics differ - allowing drop-in replacement across form factors without PCB redesign.

What is the maximum analog signal frequency supported by MAX4528CPA+?

MAX4528CPA+ is optimized for DC and low-frequency phase reversal, with typical bandwidth exceeding 1MHz (−3dB point) and usable carrier frequencies up to 100kHz in balanced modulator applications. At 100kHz, off-isolation remains >70dB and THD stays below 0.01%. Performance degrades above 100kHz due to internal capacitance imbalance, making it unsuitable for RF or high-speed data switching.