Analog Devices Inc./Maxim Integrated MAX983CSA+T

Overview

MAX983CSA+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 and window comparators requiring micropower operation.

For engineers reviewing the MAX983CSA+T datasheet, MAX983CSA+T pinout, MAX983CSA+T application, or MAX983CSA+T equivalent, key selection criteria include its 4µA max quiescent current, ±2% reference accuracy, 12µs propagation delay at 10mV overdrive, open-drain output compatible with wire-OR configurations, and dual-comparator architecture with shared REF/HYST pins for compact hysteresis implementation.

Technical Context

The MAX983CSA+T integrates two independent comparators sharing a single internal 1.182V bandgap reference and one HYST pin, enabling synchronized hysteresis programming for both channels using two external resistors. Its open-drain outputs sink current to V− (not GND), supporting true dual-supply operation without ground reference dependency.

Input common-mode range extends from V− to (V+ − 1.3V), and absolute input voltage tolerance allows signals up to ±0.3V beyond rails. Propagation delay is specified at 12µs (high-to-low) with 10mV overdrive and 100pF load, while low-to-high response depends on external pull-up RC time constant.

Key Specifications

Pinout & Package

MAX983CSA+T is housed in an 8-pin SO (Small Outline) package with standard .150" width and gull-wing leads. Pin 1 is marked by notch or dot; pin numbering follows counter-clockwise convention from top-left corner when viewed from top.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX982CSA+T, MAX983CSA+T offers identical performance and drop-in compatibility; compared with TLV3702IDR, it delivers higher integration (reference + hysteresis) at the cost of ~2.2µA higher quiescent current, reducing component count and PCB area in space-constrained designs.

Availability

MAX983CSA+T 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 MAX983CSA+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, medical, and communications markets.

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

FAQ

What is the maximum supply voltage for MAX983CSA+T?

The MAX983CSA+T supports a maximum total supply voltage of 11V - either as a single 2.5V–11V supply or dual ±1.25V–±5.5V supplies. Exceeding 11V risks permanent damage, per absolute maximum ratings. At 11V, the device maintains ≤4µA supply current and full functionality of its 1.182V reference and open-drain outputs.

Does MAX983CSA+T have an internal voltage reference?

Yes, MAX983CSA+T includes an internal 1.182V bandgap voltage reference with ±2% accuracy over 0°C to +70°C. The REF pin outputs this voltage referenced to V− (not GND), and can source up to 25µA or sink up to 15µA. This eliminates the need for an external reference in most threshold-detection applications.

How is hysteresis implemented on MAX983CSA+T?

Hysteresis on MAX983CSA+T is programmed via the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The voltage difference (REF − V_HYST) sets the hysteresis band (up to 100mV). This method applies identical hysteresis to both comparators and avoids external feedback paths that increase noise and layout sensitivity.

What is the output configuration of MAX983CSA+T?

MAX983CSA+T features open-drain outputs that sink current to V− (not GND). This architecture enables wire-ORing of multiple outputs, level translation between different supply domains, and bipolar-to-single-ended conversion. An external pull-up resistor is required to define the high-state voltage level.

Can MAX983CSA+T operate from a 3V single supply?

Yes, MAX983CSA+T is fully specified for 3V single-supply operation (V+ = 3V, V− = GND). At 3V, supply current remains ≤4µA, input common-mode range covers 0V to 1.7V, and propagation delay is 12µs (high-to-low) with 10mV overdrive. The internal 1.182V reference remains stable and usable for threshold generation.