MAX6190CESA

Overview

The MAX6190CESA+ is a precision, micropower, low-dropout voltage reference featuring a 1.25V output and an 8-pin SO package. It delivers ±6mV initial accuracy with a maximum temperature coefficient of 5ppm/°C. The device operates within a supply voltage range of 2.5V to 12.6V while consuming a maximum quiescent current of 35µA. It supports source and sink currents up to 500µA with a dropout voltage of 100mV at full load. The component is internally compensated, ensuring stability with capacitive loads up to 2.2nF.

Feature Summary

• Proprietary curvature-correction circuit combined with laser-trimmed thin-film resistors ensures high initial accuracy and very low temperature coefficient.
• Series-mode architecture provides supply current virtually immune to input voltage variations, maximizing efficiency in battery-powered applications.
• Internally compensated design eliminates the need for external compensation components and guarantees fast settling times.
• Capable of sourcing and sinking up to 500µA with minimal dropout voltage, making it suitable for low-voltage systems.

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 includes the plus sign (+) to confirm lead-free and RoHS-compliant packaging status. Ensure the specific temperature grade (e.g., C for commercial) matches the required operating environment. Confirm the package type corresponds to the standard 8-pin Small Outline configuration before finalizing procurement specifications.

Selection Notes

Select this component when precise voltage referencing is required alongside strict power consumption limits. The low quiescent current makes it ideal for battery-operated devices where extending operational life is critical. Consider the internal compensation and capacitive load stability if board space constraints prevent the use of external stabilization components.

Part Context

This part belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references manufactured by Analog Devices Inc./Maxim Integrated. The series utilizes a series-mode bandgap topology designed for high performance in compact form factors. These devices are engineered to provide stable reference voltages across varying industrial and commercial temperature ranges.

Replacement Considerations

Other members of the MAX619x family offer different fixed output voltages but share identical pinouts and electrical characteristics. Verify that the replacement part number specifies the same 1.25V output voltage and compatible accuracy grade to ensure functional interchangeability without circuit redesign.

FAQ

Does the MAX6190CESA+ require an external capacitor for frequency stability?

No, the device is internally compensated and stable with capacitive loads ranging from 0 to 2.2nF. An external capacitor is optional and primarily used to reduce overshoot or undershoot during transient load changes.

How does the supply current behavior differ from shunt-mode references?

Unlike shunt-mode references that draw current continuously based on the input voltage, the MAX6190 draws load current only when required. This results in a quiescent current that is virtually independent of the supply voltage, improving overall system efficiency.