MAX6194AESA

Overview

The MAX6194AESA+ is a precision, micropower, low-dropout voltage reference IC manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 4.5V with an initial accuracy of ±0.04% and a maximum temperature coefficient of 5ppm/°C. The device operates within a supply voltage range of 4.7V 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 allows stability with capacitive loads up to 2.2nF without external components
• Capable of sourcing and sinking load currents up to 500µA while maintaining low dropout performance

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 initial accuracy grade (±0.04%) and confirm the 'E' indicates the SO-8 package type. Ensure the '+' suffix denotes lead-free/RoHS compliance as specified in the ordering information. Cross-reference the manufacturer's part number against the official datasheet selector guide to validate the exact electrical characteristics before integration.

Selection Notes

Select this component when a stable 4.5V reference is required with minimal power consumption. The series-mode topology offers superior efficiency compared to shunt references, particularly in battery-powered applications where supply current must remain constant regardless of input voltage changes. Verify that the input voltage stays within the specified range to ensure proper regulation and avoid excessive dropout voltage effects.

Part Context

This device belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references. All members share identical pinouts, package options, and core architectural features, differing primarily in their fixed output voltage levels and associated accuracy grades. The MAX6194 specifically targets applications requiring a 4.5V reference derived from standard 5V or higher supply rails.

Replacement Considerations

Other members of the MAX619x family, such as MAX6194B or MAX6194C, offer alternative accuracy grades. For automotive applications, consider the MAX6194AESA/V+ variant which holds AEC-Q100 qualification.