MAX6191AESA+T

Overview

The MAX6191AESA+T is a precision, micropower, low-dropout voltage reference from the MAX6190–MAX6195/MAX6198 series. 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 an operating 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 'T' indicates tape-and-reel packaging if reel handling is required for assembly. Confirm that the 'A' grade corresponds to the ±5mV initial accuracy specification rather than the tighter ±2mV option. Ensure the application input voltage stays within the 2.5V to 12.6V range to maintain guaranteed line regulation performance.

Selection Notes

Select this part when a stable 2.048V reference is needed for battery-powered systems requiring minimal quiescent current. It is suitable for designs where board space is limited due to optional output capacitance requirements. Choose this over shunt references when efficiency is critical, as it only draws load current when necessary rather than wasting power through a series resistor.

Part Context

This component belongs to the Maxim Integrated MAX6190 family of precision bandgap voltage references. The family shares common architectural features including low dropout characteristics and micropower operation. Variants within the series differ primarily by their fixed output voltage levels and initial accuracy grades, allowing designers to select the precise voltage and tolerance required for specific analog signal chain applications.

Replacement Considerations

Direct functional substitutes within the same family include MAX6191BESA+ (±2mV accuracy) and MAX6191CESA+ (±10mV accuracy). Other voltage options such as MAX6190 or MAX6192 share the same pinout and package but provide different reference voltages.