Analog Devices Inc./Maxim Integrated MAX982CUA+

Overview

MAX982CUA+ from Maxim Integrated is a dual, ultra-low-power, open-drain comparator with internal 1.182V ±2% voltage reference and programmable hysteresis via HYST pin. It operates from single 2.5V–11V or dual ±1.25V–±5.5V supplies, draws ≤4µA supply current over temperature, and supports rail-to-rail input voltage range (V− to V+ − 1.3V). It is used in battery-powered threshold detectors requiring stable low-power analog decision-making.

For engineers reviewing the MAX982CUA+ datasheet, MAX982CUA+ pinout, MAX982CUA+ application, or MAX982CUA+ equivalent, key selection criteria include its 4µA quiescent current, ±2% reference accuracy, dual-comparator open-drain outputs with separate V− sink, 12µs propagation delay at 10mV overdrive, and µMAX-8 package compatibility for space-constrained portable systems.

Technical Context

The MAX982CUA+ integrates two independent micropower comparators sharing a common internal bandgap reference and HYST control node. Its architecture enables hysteresis programming using only two external resistors between REF and V−, eliminating feedback loops and complex calculations.

Each comparator features rail-to-rail input operation down to the negative supply rail and up to 1.3V below the positive rail, with open-drain outputs sinking current to V− (not GND), supporting bipolar-to-single-ended level translation and wire-OR configurations across mixed-supply domains.

Key Specifications

Pinout & Package

MAX982CUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 and DIP-8 footprints but with reduced board area. The package uses standard lead-free soldering profiles and supports reflow assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-power comparator applications.

Compared with MAX982CUA+, MAX973CUA+ offers tighter reference accuracy without altering system power or layout, while TLV3702IDR reduces current draw but increases design complexity by requiring external reference routing and decoupling.

Availability

MAX982CUA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply with long-term manufacturability and consistent parametric performance.

Supply support for MAX982CUA+ 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) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and interface applications.

The MAX982CUA+ belongs to Maxim's ultra-low-power comparator family designed specifically for energy-constrained portable and industrial monitoring systems where micropower operation and integrated reference simplify threshold-detection circuitry.

FAQ

What is the maximum supply voltage for MAX982CUA+ in single-supply operation?

The MAX982CUA+ supports single-supply operation from 2.5V to 11V. At 11V, the device maintains full functionality including reference regulation and comparator response. Exceeding 11V violates absolute maximum ratings and risks permanent damage. For dual-supply use, total voltage (V+ − V−) must not exceed 11V, with individual rails ranging from ±1.25V to ±5.5V.

Does MAX982CUA+ require an external reference, or is the internal reference sufficient for most applications?

The MAX982CUA+ includes a fully integrated 1.182V ±2% bandgap reference (0°C to +70°C), eliminating the need for external references in fixed-threshold applications. It sources up to 25µA and sinks up to 15µA, supporting direct connection to resistor dividers for scaled thresholds. External references are only needed when tighter accuracy, programmability, or temperature stability beyond ±2% is required.

How is hysteresis implemented on MAX982CUA+, and what is the maximum hysteresis band achievable?

Hysteresis on MAX982CUA+ is implemented by connecting two resistors between REF, HYST, and V−. The HYST pin accepts voltages from (REF − 50mV) to REF, producing a hysteresis band (VHB) ≈ 2 × (REF − VHYST). With the maximum 50mV difference, VHB reaches 100mV. This method avoids external feedback components and ensures matched hysteresis for both comparators simultaneously.

Can MAX982CUA+ outputs be wire-ORed, and what pullup voltage is allowed?

Yes, both OUTA and OUTB are open-drain outputs that can be wire-ORed. The outputs sink to V−, allowing pullup to any voltage up to 11V above V− - including voltages higher than V+ or referenced to a different ground domain. This makes MAX982CUA+ ideal for level translation and bus arbitration in mixed-supply systems.

Is MAX982CUA+ pin-compatible with other devices in the MAX97x/MAX98x family?

MAX982CUA+ is pin-compatible with MAX973CUA+, MAX981CUA+, and MAX983CUA+ in the 8-pin µMAX package. All share identical pin functions (OUTA, V−, INA+, INB−, HYST, REF, V+, OUTB). However, it is not compatible with MAX972CUA+ (no REF/HYST pins) or MAX974CUA+/MAX984CUA+ (16-pin packages). Always verify reference accuracy (±1% vs. ±2%) when substituting.