Analog Devices Inc./Maxim Integrated MAX932CPA+

Overview

MAX932CPA+ from Maxim Integrated is a dual micropower comparator with integrated 1.182V ±2% bandgap reference, programmable hysteresis via HYST pin, TTL/CMOS-compatible outputs that source up to 40mA and sink ≥5mA, and operates from +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply - ideal for battery-powered threshold detection in portable instrumentation.

For engineers reviewing the MAX932CPA+ datasheet, MAX932CPA+ pinout, MAX932CPA+ application, or MAX932CPA+ equivalent, key selection considerations include its 4µA max quiescent current over 0°C to +70°C, rail-to-rail input range (V− to V+ − 1.3V), 12µs propagation delay at 10mV overdrive, and dual-comparator architecture with independent IN+/IN− pairs per channel.

Technical Context

The MAX932CPA+ integrates two independent comparators sharing a single internal 1.182V reference and one HYST pin for simultaneous hysteresis programming across both channels. Its output stage eliminates crowbar current during transitions, preventing supply glitches and parasitic feedback without requiring external bypassing.

Input common-mode range extends from V− to V+ − 1.3V; output swings from V+ to V− (no GND pin), enabling true dual-supply operation. The HYST pin accepts voltages from REF − 50mV to REF, allowing precise hysteresis band control up to 100mV using two external resistors.

Key Specifications

Pinout & Package

MAX932CPA+ uses an 8-pin plastic DIP package (0°C to +70°C operating range) with through-hole mounting and standard 0.3" wide body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX932CPA+, MAX932CSA+ offers identical functionality in surface-mount form for volume production, while MAX922CPA+ trades 1µA higher quiescent current for ±1% reference accuracy - making MAX932CPA+ optimal for cost-sensitive, ultra-low-power dual-threshold detection where ±2% reference tolerance suffices.

Availability

MAX932CPA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and oscillator circuits requiring stable component supply with long-term obsolescence management.

Supply support for MAX932CPA+ 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 portable electronics.

The MAX931–MAX934 family delivers ultra-low-power comparators with integrated references for energy-constrained systems where supply current, reference stability, and hysteresis simplicity are critical design parameters.

FAQ

What is the maximum supply voltage for MAX932CPA+ in single-supply operation?

The MAX932CPA+ supports a single-supply voltage range of +2.5V to +11V. When operated from a single supply, V− must be connected to GND, and the absolute maximum rating for V+ to GND is +12V - however, functional operation is guaranteed only up to +11V per the datasheet's specified supply voltage range. Exceeding +11V may cause parametric degradation or reliability risk.

Can MAX932CPA+ operate from a ±5V dual supply?

Yes, MAX932CPA+ is fully specified for dual-supply operation from ±1.25V to ±5.5V. With V+ = +5V and V− = −5V, the device maintains its 4µA max quiescent current, 1.182V reference accuracy, and 12µs propagation delay. Output swings from +5V to −5V, enabling direct interfacing with bipolar sensor signals without level shifting.

How is hysteresis programmed on MAX932CPA+?

Hysteresis on MAX932CPA+ 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 REF − 50mV to REF. For example, setting VHYST = REF − 25mV yields ~50mV total hysteresis, improving noise immunity in threshold detection circuits using MAX932CPA+.

Does MAX932CPA+ require external bypass capacitors?

No, MAX932CPA+ does not require external power-supply bypass capacitors due to its crowbar-free output stage, which eliminates switching-induced supply glitches. The datasheet explicitly states bypassing is unnecessary unless supply impedance is high or leads are long - in most PCB layouts, clean operation is achieved without added capacitance, simplifying design and saving board space around MAX932CPA+.

What is the input common-mode voltage range for MAX932CPA+?

The input common-mode voltage range for MAX932CPA+ is specified from V− to V+ − 1.3V. For example, with V+ = 5V and V− = 0V (single supply), inputs can swing from 0V to 3.7V; with V+ = +5V and V− = −5V (dual supply), inputs operate from −5V to +3.7V. This extended range enables direct connection to sensors or DACs operating near supply rails without attenuation or level-shifting circuitry.