Analog Devices Inc./Maxim Integrated MAX982CUA

Overview

The 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, supports rail-to-rail input range (V− to V+ −1.3V), and is used in battery-powered threshold detection and window comparator circuits.

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

Technical Context

The MAX982CUA integrates two independent micropower comparators sharing a common internal bandgap reference (1.182V ±2% over 0°C to +70°C) and a dedicated HYST pin enabling user-programmable hysteresis without external feedback. Its input stage accepts voltages from V− to V+ −1.3V, supporting single-supply operation with GND tied to V−.

Both comparators feature open-drain outputs that sink current to V− (not GND), enabling wire-OR configurations and bipolar-to-single-ended level translation. The device maintains stable operation across 2.5V–11V single-supply or ±1.25V–±5.5V dual-supply rails, with propagation delay specified at 12µs (high-to-low) under 10mV overdrive and 100pF load.

Key Specifications

Pinout & Package

MAX982CUA is housed in an 8-pin µMAX package (pin-compatible with SO and DIP variants), measuring 3mm × 3mm with exposed pad for thermal enhancement. Pin 1 is OUTA, pin 2 is V−, pin 3 is INA+, pin 4 is INA−, pin 5 is HYST, pin 6 is REF, pin 7 is V+, and pin 8 is OUTB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX983CUA and TLV3702IDR, the MAX982CUA uniquely balances integrated ±2% reference, programmable hysteresis, open-drain outputs sinking to V−, and µMAX-8 footprint-making it optimal for compact, self-contained dual-threshold detection without external support components.

Availability

MAX982CUA is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply and long-term production continuity.

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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and portable electronics.

The MAX982CUA belongs to the MAX981–MAX984 micropower comparator family, engineered specifically for ultra-low-quiescent-current sensing in energy-constrained systems where reference stability, hysteresis control, and supply flexibility are critical.

FAQ

What is the reference voltage accuracy of the MAX982CUA over its operating temperature range?

The MAX982CUA features an internal 1.182V bandgap reference with ±2% accuracy over the commercial temperature range (0°C to +70°C). This tolerance applies to the full operating supply range and is specified in the Electrical Characteristics table under "Reference Voltage" for MAX981–MAX984 parts. The reference is referenced to V−, not GND, and its output remains stable across load currents up to 25µA source / 15µA sink.

Can the MAX982CUA operate from a 3V single supply, and what performance changes occur?

Yes, the MAX982CUA operates from a 3V single supply (within its 2.5V–11V range). At 3V, typical supply current is 3.4µA (vs. 4µA max at 5V), propagation delay increases to ~15µs (from 12µs at 5V), and output sink capability reduces slightly. Input common-mode range remains V− to V+ −1.3V (i.e., 0V to 1.7V), and reference output holds 1.182V ±2%. These values are confirmed in the 3V Operation Electrical Characteristics table.

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

Hysteresis on the MAX982CUA is programmed using the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band (VHB) ≈ 2 × (VREF − VHYST), with VHYST adjustable from REF −50mV to REF. Thus, the maximum hysteresis band is 100mV. This method avoids external feedback loops and is validated in the Applications Information section with design equations for R1/R2 selection.

What is the output configuration of the MAX982CUA, and how does it differ from MAX971/MAX974?

The MAX982CUA has open-drain outputs that sink current to V− (not GND), unlike MAX971/MAX974 which sink to GND. This allows safe interfacing with negative supply domains and simplifies bipolar-to-single-ended conversion. The MAX982CUA's output voltage range extends to 11V above V−, and it tolerates output voltages even when V+ is unpowered-enabling robust level-shifting in mixed-supply systems.

Is the MAX982CUA pin-compatible with other members of the MAX98x family, and which packages share identical pinouts?

Yes, the MAX982CUA is pin-compatible across all 8-pin packages in its variant group: µMAX (CUA), SO (CSA), and DIP (CPA) share identical pin 1–8 assignments (OUTA, V−, INA+, INA−, HYST, REF, V+, OUTB). This allows drop-in replacement during prototyping or cost optimization without PCB redesign. Pin compatibility is explicitly confirmed in the Pin Configurations diagram and Ordering Information tables for MAX982 series parts.