MAX6194BESA+T

Overview

The MAX6194BESA+T is a precision, micropower, low-dropout series-mode bandgap voltage reference offering an output of 4.5V with <±10mV initial accuracy and <10ppm/°C temperature coefficient. It draws a maximum of 35µA quiescent current and supports source/sink currents up to 500µA with dropout voltages under 200mV. The device operates within a supply range of VOUT + 0.2V to 12.6V, features internal compensation for stability with capacitive loads up to 2.2nF, and utilizes laser-trimmed thin-film resistors in an 8-pin SO package.

Feature Summary

• Proprietary curvature-correction circuitry ensures high initial accuracy and very low temperature drift.
• Micropower operation with minimal quiescent current maximizes efficiency in battery-powered systems.
• Low-dropout design allows reliable performance even when input voltage approaches the output level.
• Internal frequency compensation guarantees stability across a wide range of capacitive load conditions.

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 that the component matches the specific 4.5V output variant within the MAX6194 family. Confirm the suffix indicates lead-free and RoHS compliance. Ensure the operating environment remains within the specified -40°C to +85°C temperature range. Validate that the application does not exceed the 500µA sourcing or sinking current limits. Check for any automotive grade requirements if applicable.

Selection Notes

Select this part when a stable 4.5V reference is required with strict power constraints. Consider it for designs needing low dropout voltage to maximize battery life. Evaluate the need for external capacitors based on transient response requirements. Compare against shunt references to determine if series-mode efficiency better suits the system architecture.

Part Context

This component belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references manufactured by Analog Devices / Maxim Integrated. The family shares common architectural features including curvature correction and micropower operation, differentiated primarily by their fixed output voltage levels and specific accuracy grades.

Replacement Considerations

Substitutes include other MAX6194 variants such as MAX6194AESA+ or MAX6194CESA+, which offer different initial accuracy and temperature coefficient specifications while maintaining the same 4.5V output and package type.