Analog Devices Inc./Maxim Integrated MAX982ESA+T

Overview

The MAX982ESA+T 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 MAX982ESA+T datasheet, MAX982ESA+T pinout, MAX982ESA+T application, or MAX982ESA+T equivalent, key selection criteria include its dual-comparator architecture with shared reference and hysteresis control, 12µs propagation delay at 10mV overdrive, open-drain output compatibility with wire-OR logic, and suitability for level translation between bipolar and single-ended domains.

Technical Context

The MAX982ESA+T integrates two independent comparators sharing a precision bandgap reference and a dedicated HYST pin for user-programmable hysteresis without external feedback. Its input stage accepts common-mode voltages from V− to (V+ −1.3V), enabling operation in single-supply systems where inputs may swing near ground.

Output stages are open-drain N-channel MOSFETs sinking to V− (not GND), supporting level-shifting applications across supply domains. The device features separate V+ and V− pins, allowing true dual-supply operation while maintaining 11V maximum output voltage swing referenced to V−.

Key Specifications

Pinout & Package

MAX982ESA+T is housed in an 8-pin SO (Small Outline) package with exposed pad (SOIC-N), pin-compatible with industry-standard .150" SO footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX973ESA+, the MAX982ESA+T trades ±1% reference accuracy for lower cost and broader temperature-grade availability; compared with LM393DR, it delivers significant system-level simplification via integrated reference and HYST pin-reducing PCB area, component count, and design validation effort.

Availability

MAX982ESA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply with extended temperature support (−40°C to +85°C).

Supply support for MAX982ESA+T 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, automotive, and consumer markets.

The MAX98x series targets ultra-low-power comparator applications where micropower operation, integrated reference, and programmable hysteresis reduce system complexity in portable and energy-harvesting devices.

FAQ

What is the reference voltage tolerance of the MAX982ESA+T over temperature?

The MAX982ESA+T features an internal 1.182V bandgap reference with ±2% accuracy over the full operating temperature range of −40°C to +85°C. This specification is guaranteed per the datasheet's Electrical Characteristics table for the E-temp grade, and applies to all MAX982 variants including MAX982ESA+T.

Can the MAX982ESA+T operate from a single 3V supply?

Yes, the MAX982ESA+T operates from a single 2.5V to 11V supply, so 3V is fully supported. At 3V, typical supply current is 3.4µA (C-temp) or 4.3µA (E-temp), and propagation delay remains within specification at 12µs with 10mV overdrive. Input common-mode range extends from V− (GND) to V+ −1.3V = 1.7V.

How is hysteresis programmed on the MAX982ESA+T?

Hysteresis on the MAX982ESA+T 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 (VREF − 50mV) to VREF. For example, setting VHYST = VREF − 25mV yields ~50mV hysteresis. This method applies identically to both comparators in MAX982ESA+T.

What is the maximum output voltage swing of the MAX982ESA+T?

The MAX982ESA+T open-drain outputs support a maximum voltage swing of 11V above V−, regardless of V+ level. When V− = GND, this means outputs can be pulled up to 11V. Even with V+ = 0V, the output transistor remains functional as long as V− is defined - enabling true level-shifting in off-state or multi-rail systems.

Does the MAX982ESA+T have separate ground pins for analog and digital sections?

No, the MAX982ESA+T does not have separate analog and digital grounds. It has a single V− pin that serves as the reference for the internal reference (REF), comparator inputs, and output sink terminals. In single-supply operation, V− is connected to system GND; in dual-supply use, V− connects to the negative rail. There is no dedicated AGND or DGND pin.