MAX983CSA+T

Comparators Overview

The MAX983CSA+T is a dual micropower comparator featuring an internal 1.182V ±2% voltage reference and programmable hysteresis. It operates from a single 2.5V to 11V supply or ±1.25V to ±5.5V dual supplies, drawing less than 4µA quiescent current. The device includes open-drain outputs with separate ground pins for level translation and bipolar-to-single-ended conversion. It provides a propagation delay of 12µs at 10mV overdrive and supports input voltages from the negative rail to within 1.3V of the positive rail.

Comparators Feature Summary

• Dual comparators with integrated precision bandgap reference
• Programmable hysteresis via dedicated HYST pin
• Open-drain outputs supporting wire-OR configurations
• Ultra-low power consumption suitable for battery systems

Comparators Applications

• Battery-powered threshold detectors
• Window comparators for undervoltage/overvoltage detection
• Level translators between bipolar and single-ended signals
• Oscillator circuits requiring low power operation

Comparators Procurement Notes

Verify the specific suffix CSA indicates the commercial temperature range (0°C to +70°C) and SOIC-8 package. Confirm RoHS compliance status (+ suffix). Ensure the source document explicitly lists this part number as available; distributor listings may vary by region. Check for any obsolescence notices in the manufacturer's latest documentation before finalizing procurement plans.

Comparators Selection Notes

Select this component when dual comparators with an internal reference are required in a small footprint. The MAX983 series offers ±2% reference accuracy compared to the ±1% accuracy of the MAX973 series. Consider the MAX983 if the application requires programmable hysteresis without external feedback resistors. Verify that the open-drain output configuration aligns with the system's logic levels and pull-up requirements.

Comparators Part Context

This device belongs to the MAX971–MAX984 family of ultra-low-power comparators. It shares the same functional architecture as the MAX973 but differs in reference accuracy and temperature grade. The MAX983 is specifically designed for applications where moderate reference precision is sufficient while maintaining minimal power consumption. It complements single-channel and quad-channel variants within the same product line.

Comparators Replacement Considerations

The MAX973CSA+T serves as a direct functional substitute with higher reference accuracy (±1%). Other family members like the MAX982CSA+T offer similar features but may differ in pinout or specific electrical characteristics. Always verify pin compatibility and electrical specifications against the original design requirements before substitution.

Comparators FAQ

How is hysteresis programmed on the MAX983?

Hysteresis is programmed using the HYST pin along with two external resistors connected to the REF pin and V-. Connecting HYST directly to REF disables hysteresis.

What is the maximum output voltage for the open-drain outputs?

The open-drain outputs can withstand a maximum voltage of 11V above V-, allowing them to interface with higher voltage logic levels even when the device supply is lower.

Can the MAX983 operate with dual supplies?

Yes, the device supports dual supplies ranging from ±1.25V to ±5.5V. In dual-supply mode, the negative supply (V-) should be connected to the system ground for proper operation.