MAX6161AESA+

Overview

The MAX6161AESA+ is a precision, low-dropout, micropower 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 10ppm/°C. The device operates within an input voltage range of 2.5V to 12.6V and draws a typical quiescent supply current of 100µA. It can source up to 4mA or sink 2mA of load current. The component is housed in an 8-pin SO package and functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Features proprietary curvature-correction circuitry and laser-trimmed thin-film resistors for high precision.
• Offers supply current that is virtually independent of the supply voltage, maximizing efficiency.
• Internally compensated design eliminates the need for external compensation capacitors.
• Capable of sourcing 5mA (4mA for this specific variant) and sinking 2mA of load current.

Applications

• Analog-to-Digital Converters (ADCs)
• Portable Battery-Powered Systems
• Notebook Computers
• PDAs, GPS, DMMs
• Cellular Phones

Procurement Notes

Verify the exact part number against official manufacturer documentation to ensure compatibility with the required output voltage and accuracy grade. Confirm the package type matches the intended PCB layout. Check for RoHS compliance status if environmental regulations apply to the final assembly. Ensure the supplier provides valid traceability documents for quality assurance purposes.

Selection Notes

Select this component when a stable 1.25V reference is required for low-power applications. Consider the specific accuracy grade (A vs B) based on the system's tolerance requirements. Evaluate the dropout voltage characteristics relative to the minimum expected supply voltage. Assess the thermal performance within the specified operating temperature range to ensure long-term stability.

Part Context

This device belongs to the MAX6161–MAX6168 family of precision voltage references. All members share similar internal architectures and packaging options but differ in their fixed output voltage levels. The family is designed for space-critical applications due to the elimination of external components. The MAX6161 specifically targets systems requiring a 1.25V reference point.

Replacement Considerations

Direct substitutes within the same family include other MAX616x variants with different output voltages if the voltage level can be adjusted externally. Cross-referencing should focus on matching the package type, operating temperature range, and electrical specifications such as line regulation and load regulation.

FAQ

Does the MAX6161AESA+ require an external capacitor for stability?

No, the internally compensated devices do not require an external compensation capacitor for frequency stability.

What is the maximum output short-circuit duration for this device?

The output short-circuit duration to GND or IN is continuous when the input voltage is less than or equal to 6V.

How does the supply current behave with respect to input voltage changes?

The supply current is virtually independent of the supply voltage, with a variation of only 8µA/V maximum.