MAX6190AESA+

Overview

The MAX6190AESA+ is a precision, micropower, low-dropout series-mode 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 4ppm/°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 guaranteed load regulation of 0.12µV/µA and line regulation of 8µV/V. 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
• Features internally compensated design ensuring stability with capacitive loads up to 2.2nF
• Offers virtually input-voltage-immune supply current for optimized battery-powered efficiency
• Capable of sourcing and sinking load currents up to 500µA with minimal dropout voltage

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 'ES' corresponds to the standard 8-pin Small Outline (SO) package configuration as documented in the manufacturer's ordering guide. Confirm that the '+' designation indicates lead-free and RoHS-compliant material composition. Ensure the selected part number matches the required initial accuracy grade of ±2mV for the 1.25V output variant. Cross-reference the operating temperature range specifications against the intended environmental conditions.

Selection Notes

Select this component when a fixed 1.25V reference with high initial accuracy is required for low-power applications. The internal compensation allows for stable operation without mandatory external output capacitors, saving board space. Consider the 35µA maximum quiescent current for battery life optimization. Verify that the input voltage remains within the specified 2.5V to 12.6V range to maintain guaranteed line regulation performance.

Part Context

This device belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references. All members share identical pinouts, package styles, and core architectural features, differing primarily in their factory-set output voltages and associated accuracy grades. The MAX6190 specifically targets the lowest voltage point in this series, providing a 1.25V reference suitable for low-voltage analog signal processing chains.

Replacement Considerations

Direct functional substitutes within the same family include the MAX6190BESA+ and MAX6190CESA+, which offer different initial accuracy grades while maintaining the same 1.25V output and package type.