MAX6194CESA+

Overview

The MAX6194CESA+ is a precision, micropower, low-dropout voltage reference from the MAX6190–MAX6195/MAX6198 family. It provides a fixed output voltage of 4.5V with an initial accuracy of ±10mV and a maximum temperature coefficient of 25ppm/°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 200mV 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 that the ordering suffix matches the required specifications, as different suffixes indicate variations in accuracy grades or packaging formats. Confirm the lead-free status aligns with RoHS compliance requirements for your assembly process. Ensure the selected package type corresponds to your board layout constraints. Cross-reference the specific part number against the manufacturer's latest datasheet to confirm active status and availability before finalizing procurement.

Selection Notes

Select this component when a stable 4.5V reference is required with moderate precision needs. The MAX6194 offers a balance between performance and power consumption suitable for battery-powered applications. Consider the 25ppm/°C temperature coefficient and ±10mV initial accuracy against stricter requirements offered by other family members like the MAX6194B or MAX6194A. Evaluate the 35µA quiescent current draw to ensure it meets system efficiency targets.

Part Context

This device belongs to the MAX6190–MAX6195/MAX6198 series of precision voltage references manufactured by Analog Devices / Maxim Integrated. The family shares common architectural features including micropower operation and low-dropout capabilities. The MAX6194 specifically targets applications requiring a 4.5V output level, distinguishing it from other variants offering voltages such as 1.25V, 2.048V, 2.5V, 3.0V, 4.096V, and 5.0V.

Replacement Considerations

Direct substitutes within the same family include MAX6194AESA+ (±5mV accuracy) and MAX6194BESA+ (±10mV accuracy). Verify that any replacement maintains the required 4.5V output voltage and fits the 8-SO package footprint. Ensure the alternative part meets the -40°C to +85°C operating temperature range.