Analog Devices Inc./Maxim Integrated MAX982ESA+

Overview

The MAX982ESA+ 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 (V− to V+ − 1.3V), and targets battery-powered threshold detection in portable instrumentation.

For engineers reviewing the MAX982ESA+ datasheet, MAX982ESA+ pinout, MAX982ESA+ application, or MAX982ESA+ equivalent, key selection criteria include its dual-comparator architecture with shared reference and hysteresis control, guaranteed operation down to 2.5V supply, open-drain output compatibility with 11V output swing, and SO-8 package suitability for space-constrained low-power designs.

Technical Context

The MAX982ESA+ integrates two independent comparators sharing a single internal bandgap reference (1.182V ±2% at 0°C to +70°C) and a dedicated HYST pin enabling user-programmable hysteresis without external feedback. Its input common-mode range extends from V− to V+ − 1.3V, supporting operation near supply rails in single-supply systems.

Both outputs are open-drain N-channel MOSFETs sinking to V− (not GND), requiring external pull-up resistors. Propagation delay is 12µs (high-to-low) at 10mV overdrive with 100pF load and 1MΩ pull-up, and output leakage remains ≤100nA at 11V. The device is specified for extended temperature range (−40°C to +85°C) and qualifies for industrial applications.

Key Specifications

Pinout & Package

MAX982ESA+ is housed in an 8-pin SO (Small Outline) package (SOIC-N, 150-mil width), pin-compatible with industry-standard SO-8 footprints. 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 with reference applications.

Compared with MAX983ESA+, the MAX982ESA+ provides independent comparator inputs for flexible threshold assignment, while TLV3702IDR trades integrated reference and hysteresis for lower quiescent current and rail-to-rail output swing-making it suitable where external components are acceptable and sub-2µA current is mandatory.

Availability

MAX982ESA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and level translators requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX982ESA+ 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 MAX971–MAX984 family was engineered specifically for ultra-low-power comparator applications demanding integrated references and programmable hysteresis in compact packages-targeting portable instrumentation, battery management, and sensor interface systems.

FAQ

What is the maximum output voltage swing supported by the MAX982ESA+?

The MAX982ESA+ open-drain outputs support up to 11V above V−, meaning the output can be pulled up to 11V even when V+ is unpowered. This enables robust level translation in mixed-voltage systems. The MAX982ESA+ output stage sinks to V−, not GND, so proper connection of V− is essential for correct operation.

Can the MAX982ESA+ operate from a 3.3V single supply?

Yes, the MAX982ESA+ is fully specified for single-supply operation from 2.5V to 11V, including 3.3V. At 3.3V, supply current remains ≤4µA over temperature, input common-mode range covers 0V to 2.0V, and propagation delay increases slightly to ~14µs (high-to-low) at 10mV overdrive - all within datasheet limits.

How is hysteresis programmed on the MAX982ESA+?

Hysteresis is programmed by connecting resistor 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. For example, setting VHYST = REF − 25mV yields ~50mV hysteresis. The MAX982ESA+ applies identical hysteresis to both comparators.

Does the MAX982ESA+ require a bypass capacitor on the REF pin?

No - the datasheet explicitly states "Do not bypass the REF output." Adding capacitance to REF causes instability and increased noise. The internal reference is designed for direct connection to HYST and light external loads (≤6µA sink). For noise-sensitive applications, route REF away from noisy traces and avoid coupling to OUT pins.

What is the operating temperature range for the MAX982ESA+?

The MAX982ESA+ is rated for the extended industrial temperature range of −40°C to +85°C. This is confirmed by its "ESA" suffix (E = −40°C to +85°C, SA = SO package) and electrical specifications tested across this range, including supply current ≤4µA and reference accuracy ±3%.