Analog Devices Inc./Maxim Integrated MAX982CPA

Overview

MAX982CPA from Maxim Integrated is a dual-channel, ultra-low-power comparator with integrated 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, features open-drain outputs sinking to V−, and draws ≤4µA supply current over temperature. It is used in battery-powered threshold detectors requiring rail-to-rail input range (V− to V+ − 1.3V) and level translation.

For engineers reviewing the MAX982CPA datasheet, MAX982CPA pinout, MAX982CPA application, or MAX982CPA equivalent, key selection criteria include its 4µA quiescent current, 12µs propagation delay at 10mV overdrive, ±2% reference accuracy, dual-comparator architecture with shared HYST/REF, and compatibility with 8-pin PDIP packaging for through-hole prototyping and industrial control interfaces.

Technical Context

The MAX982CPA implements two independent micropower comparators sharing a single internal 1.182V bandgap reference and one HYST pin for simultaneous hysteresis programming on both channels. Its input common-mode range extends from V− to V+ − 1.3V, enabling direct sensing near supply rails without external biasing.

Each comparator features an open-drain output stage sinking current to V− (not GND), supporting wire-OR configurations and bipolar-to-single-ended level shifting. The REF pin delivers up to 25µA source / 15µA sink capability, and the HYST pin accepts voltages from (REF − 50mV) to REF - enabling precise 100mV max hysteresis bands via two external resistors.

Key Specifications

Pinout & Package

MAX982CPA is housed in an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width, suitable for through-hole PCB assembly and breadboard evaluation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX973CPA, the MAX982CPA trades reference accuracy for broader commercial temperature range compatibility and lower unit cost; compared with LM393DR, it delivers 250× lower quiescent current and integrated reference/hysteresis - reducing BOM count by up to 5 passive components per channel.

Availability

MAX982CPA is available at Aetrix Electronics and suitable for battery-powered systems, industrial threshold detectors, and level-translating interfaces requiring stable component supply across extended production lifecycles.

Supply support for MAX982CPA 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 communications markets.

The MAX982CPA belongs to the MAX97x/MAX98x micropower comparator family, engineered specifically for ultra-low-power sensing and monitoring in battery-critical systems where sub-5µA operation and integrated reference functionality are mandatory.

FAQ

What is the maximum supply voltage for MAX982CPA?

The MAX982CPA supports a total supply voltage (V+ − V−) up to 11V in single-supply mode or ±5.5V in dual-supply mode. Absolute maximum ratings specify V+ to V− as +12V, but functional operation is guaranteed only up to 11V. Exceeding this may cause parametric degradation or latch-up. The MAX982CPA datasheet confirms 11V as the maximum recommended operating supply voltage under all conditions.

Does MAX982CPA have a built-in voltage reference?

Yes, the MAX982CPA integrates a 1.182V bandgap voltage reference referenced to V−, with ±2% accuracy over 0°C to +70°C. This reference drives the REF pin and serves as the hysteresis reference for the HYST pin. It can source up to 25µA and sink up to 15µA, and must not be externally bypassed - as stated in the "Voltage Reference" section of the MAX982CPA datasheet.

Can MAX982CPA operate from a single 3V supply?

Yes, the MAX982CPA is fully specified for single-supply operation from 2.5V to 11V, including 3V. At 3V, typical supply current is 3.4µA (C-temp range), input offset voltage remains ±10mV, and propagation delay increases slightly to 12µs at 10mV overdrive. The device maintains full functionality - including REF output and HYST-controlled hysteresis - across this range, as verified in the "ELECTRICAL CHARACTERISTICS-3V OPERATION" table of the MAX982CPA datasheet.

What is the purpose of the HYST pin on MAX982CPA?

The HYST pin on MAX982CPA enables programmable hysteresis for both comparators using two external resistors between REF, HYST, and V−. It accepts voltages from (REF − 50mV) to REF, producing a hysteresis band up to 100mV. This eliminates need for external positive-feedback networks and ensures matched hysteresis on both channels - a feature explicitly documented in the "Hysteresis (MAX9_1/MAX982/MAX9_3)" section of the MAX982CPA datasheet.

Is MAX982CPA pin-compatible with other MAX98x series devices?

Yes, MAX982CPA is pin-compatible with MAX973CPA, MAX981CPA, and MAX983CPA in the 8-pin DIP package - sharing identical pin functions for OUTA, V−, INA+, INB−, HYST, REF, V+, and OUTB. This allows direct substitution where ±2% reference accuracy (MAX982CPA) is acceptable instead of ±1% (MAX973CPA) or single-channel variants (MAX981CPA). Pin compatibility is confirmed in the "Pin Configurations" diagram and "Ordering Information" table of the MAX982CPA datasheet.