MAX9051AESA+T

Overview

The MAX9051AESA+T is a micropower, single-supply comparator and precision voltage reference IC manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 2.7V to 5.5V and consumes only 40μA of quiescent supply current. The device integrates a single comparator with rail-to-rail inputs and outputs, featuring an internal hysteresis of ±3mV and a propagation delay of 400ns. It includes a built-in 2.500V precision voltage reference with A-grade initial accuracy of ±0.4% and a temperature coefficient of 6ppm/°C. The component is housed in an 8-pin SO package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates a low-power comparator with a precision voltage reference in a single compact package
• Features rail-to-rail input and output stages for compatibility with various logic levels
• Includes internal hysteresis to ensure clean switching transitions on slow-moving signals
• Utilizes a unique output stage design that minimizes supply current surges during switching

Applications

• Precision battery management systems
• Window comparator circuits
• Infrared (IR) receivers
• Level translators
• Digital line receivers

Procurement Notes

Verify the specific suffix '+T' against official documentation to confirm tape-and-reel packaging status, as datasheet ordering tables list 'MAX9051AESA' without the suffix for standard tube packaging. Confirm RoHS compliance and lead-free status via manufacturer certificates. Check for any recent product change notices or end-of-life announcements directly from Analog Devices before procurement planning.

Selection Notes

Select this component when designing battery-operated systems requiring both signal comparison and a stable reference voltage. The 40μA supply current makes it suitable for power-constrained applications. Ensure the required reference voltage matches the fixed 2.500V output; if different voltages are needed, consider other members of the MAX9038–MAX9053 family. Verify that the 400ns propagation delay meets the timing requirements of the target application.

Part Context

The MAX9051AESA+T belongs to the MAX9038–MAX9053 family of micropower comparators and precision references. This series is designed for low-voltage, single-supply operation, offering combinations of comparators and voltage references in small packages like UCSP, SOT23, and SO. The family targets portable electronics and battery-powered devices where space and power consumption are critical constraints.

Replacement Considerations

Direct substitutes within the same family include MAX9051BESA for B-grade reference accuracy. Other family members like MAX9050 provide a 2.500V reference but may differ in pinout or package options. Cross-reference with MAX9038–MAX9043 variants if different reference voltages or dual-comparator configurations are acceptable.

FAQ

What is the fixed output voltage of the integrated precision reference?

The integrated precision voltage reference provides a fixed output voltage of 2.500V.

Does the MAX9051AESA+T have internal hysteresis?

Yes, the comparator features internal hysteresis of ±3mV to ensure clean output switching.

What is the typical input bias current of the comparator?

The typical input bias current is 1.0pA when the input voltage is between the supply rails.