Analog Devices Inc./Maxim Integrated MAX932CSA+

Overview

MAX932CSA+ from Maxim Integrated is a dual micropower comparator with integrated 1.182V ±2% bandgap reference, programmable hysteresis via HYST pin, and TTL/CMOS-compatible outputs that source up to 40mA and sink ≥5mA. It operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply), features input range extending to V− and within 1.3V of V+, and draws ≤4µA quiescent current over 0°C to +70°C - ideal for battery-powered threshold detection and window comparator circuits.

For engineers reviewing the MAX932CSA+ datasheet, MAX932CSA+ pinout, MAX932CSA+ application, or MAX932CSA+ equivalent, key selection criteria include its dual-comparator architecture with shared internal reference, HYST-pin-based hysteresis programming without external feedback, rail-to-rail input capability, and output swing from V+ to V− (requiring V− connection to GND for single-supply TTL compatibility).

Technical Context

The MAX932CSA+ integrates two independent comparators sharing a single 1.182V ±2% reference and one HYST pin for simultaneous hysteresis configuration across both channels. Its output stage eliminates crowbar current during transitions, minimizing supply-line parasitic feedback and enabling stable operation without strict layout constraints.

Input common-mode range spans V− to (V+ − 1.3V); output swings fully from V+ to V−, requiring explicit V− connection (not GND) for dual-supply use. The HYST pin accepts 1.132V–1.182V (REF − 50mV to REF), enabling precise hysteresis bands up to 100mV using two external resistors.

Key Specifications

Pinout & Package

MAX932CSA+ is housed in an 8-pin SO (Small Outline) package with JEDEC MS-012AC footprint, rated for 0°C to +70°C operation. Pin 1 is marked with a dot or notch; pin numbering follows standard SO convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX932ESA+ and MAX922CSA+, the MAX932CSA+ offers optimal balance of ultra-low power (≤4.5µA), integrated 2% reference, and SO-package compatibility for cost-sensitive commercial designs - whereas MAX932ESA+ extends thermal range without performance trade-offs, and MAX922CSA+ sacrifices power efficiency for reference precision and requires PCB rework.

Availability

MAX932CSA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with guaranteed commercial-temperature performance.

Supply support for MAX932CSA+ 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, with emphasis on energy efficiency and integration.

The MAX931–MAX934 family delivers micropower comparators with integrated references for battery-critical systems - targeting portable medical devices, sensor nodes, and industrial monitoring where µA-level quiescent current and self-contained thresholding are essential.

FAQ

What is the maximum supply voltage for MAX932CSA+ in single-supply operation?

The MAX932CSA+ supports single-supply operation from +2.5V to +11V. When V− is connected to GND, the absolute maximum rating between V+ and GND is +12V, but functional operation is specified up to +11V. Exceeding +11V may degrade reference accuracy or increase quiescent current beyond datasheet limits.

Does MAX932CSA+ require external hysteresis components for stable operation?

No - the MAX932CSA+ includes a dedicated HYST pin enabling programmable hysteresis using just two external resistors. This eliminates the need for external feedback networks or op-amps. If hysteresis is not required, connect HYST directly to REF; the device remains stable without additional components.

Can MAX932CSA+ operate from a 3V supply while maintaining full specifications?

Yes - the MAX932CSA+ is fully specified down to +2.5V. At +3V supply, quiescent current remains ≤3.0µA (typical), propagation delay is 14µs (typical at 10mV overdrive), and reference output holds 1.182V ±2%. Input common-mode range extends from GND to +1.7V, supporting most 3V-sensor interfaces.

How is the reference voltage of MAX932CSA+ referenced - to GND or V−?

The internal 1.182V reference of MAX932CSA+ is referenced to V−, not GND. When operating in single-supply mode (V− = GND), REF = 1.182V relative to GND. In dual-supply mode (e.g., V+ = +5V, V− = −5V), REF = 1.182V above V− (i.e., −3.818V relative to GND). This must be accounted for in threshold resistor calculations.

What is the output voltage swing capability of MAX932CSA+?

The MAX932CSA+ outputs swing from V+ to V−. In single-supply mode (V− = GND), OUTA and OUTB swing from V+ to GND - delivering TTL/CMOS-compatible levels with +5V supply. In dual-supply mode, outputs swing rail-to-rail (e.g., +5V to −5V), enabling direct bipolar signal conditioning without level-shifting circuitry.