MAX6191AESA

Overview

The MAX6191AESA+ is a precision, micropower, low-dropout voltage reference from the MAX6190–MAX6195/MAX6198 family. It provides a fixed output voltage of 2.048V with an initial accuracy of ±5mV and a maximum temperature coefficient of 5ppm/°C. The device operates within a supply voltage range of 2.5V to 12.6V and draws a maximum quiescent supply current of 35µA. It supports source and sink currents up to 500µA with a dropout voltage of approximately 100mV at full load. The component is housed in an 8-pin SO package and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Utilizes proprietary curvature-correction circuitry and laser-trimmed thin-film resistors for high precision
• Series-mode architecture ensures supply current remains virtually independent of input voltage variations
• Internally compensated design guarantees stability with capacitive loads up to 2.2nF without external components

Applications

• Hand-held instruments
• Analog-to-Digital and Digital-to-Analog Converters
• Industrial Process Control
• Precision 3V/5V Systems
• Hard-Disk Drives

Procurement Notes

Verify the specific suffix 'A' corresponds to the required ±5mV initial accuracy grade when sourcing. Confirm the 'ES' indicates the 8-pin Small Outline package type. Ensure the '+' suffix requirement is met for lead-free and RoHS compliance specifications. Cross-reference the manufacturer's latest documentation to confirm availability status and any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when a stable 2.048V reference is needed with minimal power consumption. The series-mode topology offers superior efficiency compared to shunt references by drawing current only when load demands it. Verify that the application requires sourcing or sinking currents within the 500µA limit to ensure line and load regulation specifications are maintained under all operating conditions.

Part Context

This part belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references manufactured by Analog Devices Inc./Maxim Integrated. The family shares common architectural features including low dropout characteristics and micropower operation. Variations within the family primarily differ in fixed output voltage levels and initial accuracy grades, allowing designers to choose specific voltage points while maintaining consistent performance metrics.

Replacement Considerations

Direct substitutes include other members of the MAX6190–MAX6195/MAX6198 family such as the MAX6190AESA+ or MAX6192AESA+, provided the output voltage matches the system requirements. Ensure any replacement maintains the same 8-pin SO package footprint and meets the -40°C to +85°C operating temperature range specification.