MAX991EUA

Comparators Overview

The MAX991EUA is a micropower, low-voltage analog comparator featuring two channels in an 8-pin UMAX package. It operates on a single supply voltage ranging from 2.5V to 5.5V or dual supplies of ±1.25V to ±2.75V. The device draws a maximum static current of 96µA and offers a typical CMRR and PSRR of 80dB. Key electrical parameters include a maximum propagation delay of 210ns, input offset voltage of 5mV at 5.5V, and input bias current of 1pA at 5.5V. Hysteresis is specified at ±2.5mV. It functions within a temperature range of -40°C to +85°C.

Comparators Feature Summary

• Micropower operation with low quiescent current consumption suitable for battery-powered applications
• Low-voltage capability allowing direct interface with standard logic families
• Rail-to-rail output swing providing full dynamic range utilization
• High common-mode rejection ratio ensuring stable performance under varying input conditions

Comparators Applications

• Battery-powered monitoring systems requiring low standby current
• Threshold detection circuits in portable electronic devices
• Voltage level shifting interfaces between different logic domains
• Simple over-voltage or under-voltage protection schemes

Comparators Procurement Notes

Verify the specific suffix 'EUA' corresponds to the UMAX-8 package variant when sourcing. Confirm RoHS compliance status as indicated by the '+' suffix in ordering part numbers. Ensure the supplier provides official datasheets referencing the MAX991 series specifications. Check for any obsolescence notices or lifecycle changes from Analog Devices. Validate that the component meets the required operating temperature range for your specific application environment.

Comparators Selection Notes

Select this component when low power consumption is critical alongside low-voltage operation. Compare propagation delay specifications against other comparators if speed is a constraint. Consider the UMAX package size constraints relative to PCB layout requirements. Evaluate the input bias current characteristics for high-impedance sensor interfaces. Verify that the rail-to-rail output compatibility matches the downstream logic input requirements.

Comparators Part Context

The MAX991 belongs to Maxim Integrated's family of micropower comparators designed for low-voltage applications. It shares functional similarities with the MAX990 but differs in output stage configuration and packaging options. The EUA suffix denotes the specific UMAX-8 surface-mount package variant. This series targets applications where power efficiency and small form factor are primary design drivers.

Comparators Replacement Considerations

The MAX990EUA+ is a related device within the same product family offering similar micropower characteristics. Verify pinout compatibility and output stage differences before substitution. Consult official cross-reference guides for confirmed equivalent part numbers.