MAX6190AESA

Overview

The MAX6190AESA+ is a precision, micropower, low-dropout voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 1.25V with an initial accuracy of ±2mV 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 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
• Features internally compensated design ensuring stability with capacitive loads up to 2.2nF
• Offers virtually immunity to input voltage variations in supply current consumption

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 'E' indicates the 8-pin SO package and '+' denotes lead-free/RoHS compliance. Confirm the 'A' grade corresponds to the ±2mV initial accuracy specification. Ensure the ordering part number matches the required temperature range and pin configuration before procurement.

Selection Notes

Select this component when battery-powered applications require minimal quiescent current alongside high initial accuracy. The low dropout characteristic makes it suitable for systems where the input voltage is close to the desired reference level. Verify that the required load current does not exceed the 500µA sourcing or sinking limits.

Part Context

This device belongs to the MAX6190–MAX6195/MAX6198 family of series-mode bandgap references. While sharing similar architecture and performance characteristics, other members of the family offer different fixed output voltages such as 2.048V, 2.5V, 3.0V, 4.096V, 4.5V, and 5.0V. The MAX6190 specifically targets applications requiring a 1.25V reference.

Replacement Considerations

The datasheet notes pin compatibility with LT1640 and LT4250 devices, though these are distinct product families. Direct replacements within the same Maxim Integrated portfolio include other grades (B, C) of the MAX6190 offering lower accuracy, or other voltages from the MAX619x series if the system allows.