Analog Devices Inc./Maxim Integrated MAX983CSA

Overview

The MAX983CSA 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, features input range from V− to (V+ − 1.3V), and draws ≤4µA supply current over temperature - ideal for battery-powered threshold detection in portable instrumentation.

For engineers reviewing the MAX983CSA datasheet, MAX983CSA pinout, MAX983CSA application, or MAX983CSA equivalent, key selection criteria include its dual-comparator architecture with shared reference, 12µs propagation delay at 10mV overdrive, open-drain output sinking capability to V−, and SO-8 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX983CSA integrates two independent comparators sharing a precision bandgap reference and a dedicated HYST pin enabling resistor-programmable hysteresis without external feedback. Its input stage supports rail-to-rail common-mode operation down to V− and up to V+ − 1.3V, while the open-drain outputs permit wire-ORing and level translation across voltage domains.

Unlike the MAX97x series (±1% reference), the MAX983CSA uses a ±2% reference optimized for cost-sensitive applications where tighter accuracy is not required. Its HYST pin interface allows symmetric hysteresis bands up to 100mV by setting REF–HYST voltage between 0 and 50mV - a feature absent in MAX972/MAX974 and non-hysteretic variants like MAX984.

Key Specifications

Pinout & Package

MAX983CSA is housed in an 8-pin SO (SOIC-N) package with gull-wing leads, 1.27mm pitch, and JEDEC MS-012AC outline. Thermal performance supports continuous operation at +70°C ambient with 471mW max power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX973CSA, the MAX983CSA trades ±1% reference accuracy for lower cost and sufficient stability in consumer-grade power monitoring; versus TLV3702IDR, it eliminates external reference sourcing but sacrifices speed and supply flexibility.

Availability

MAX983CSA is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply with commercial temperature grade (0°C to +70°C) and SO-8 packaging.

Supply support for MAX983CSA 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 communications markets.

The MAX98x comparator family targets ultra-low-power sensing and monitoring systems where micropower operation, integrated reference, and hysteresis simplicity are prioritized over speed or ultra-high accuracy.

FAQ

What is the maximum supply voltage for MAX983CSA?

The MAX983CSA supports a total supply voltage (V+ − V−) up to 11V in single-supply mode (e.g., V+ = 11V, V− = GND) or ±5.5V in dual-supply mode. Absolute maximum ratings specify V+ to V− as +12V, but functional operation is guaranteed only up to 11V. Exceeding this may cause permanent damage or parametric shift.

Can MAX983CSA operate from a 1.8V single supply?

No. The MAX983CSA has a guaranteed minimum operating supply of 2.5V (V+ − V−). While some comparators in the MAX97x/MAX98x family (e.g., MAX974) may function down to 1V, the MAX983CSA is not characterized or specified below 2.5V - attempting 1.8V operation risks failure to latch, increased propagation delay, or reference dropout.

How is hysteresis programmed on MAX983CSA?

Hysteresis on the MAX983CSA is programmed by connecting two resistors: R1 between REF and HYST, and R2 between HYST and V−. The resulting hysteresis band (VHB) ≈ 2 × (REF − VHYST), with VHYST adjustable from (REF − 50mV) to REF. For example, setting VHYST = REF − 25mV yields ~50mV hysteresis - no external op-amp or feedback loop required.

Does MAX983CSA require a bypass capacitor on the REF pin?

No. The MAX983CSA datasheet explicitly states "Do not bypass the REF output." Adding capacitance to REF can destabilize the internal bandgap circuit, increase noise, or cause oscillation. The reference is designed for direct connection to resistor dividers or HYST; if filtering is needed, use RC networks downstream of REF, not at the pin itself.

What is the output sink capability of MAX983CSA?

The MAX983CSA open-drain outputs (OUTA and OUTB) sink current to V−, not GND. At V+ = 5V and I_OUT = 1.8mA, output low voltage is typically V− + 0.4V. Sink current capability degrades at low supply voltages - e.g., at V+ = 3V, max sink is ~0.8mA before VOL exceeds 0.4V. Always verify load conditions across full temperature and supply range.