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 virtually independent of the supply voltage to maximize efficiency.
• Internally compensated design eliminates the need for external compensation capacitors.
• Capable of sourcing 4mA and sinking 2mA load currents without requiring external biasing resistors.

Applications

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

Procurement Notes

Verify the specific suffix 'A' indicates the ±2mV initial accuracy and 10ppm/°C temperature coefficient variant. Confirm the 'ESA+' designation corresponds to the lead-free, RoHS-compliant 8-pin SO package. Ensure the application requires the 1.25V output option available within the MAX6161–MAX6168 family. Check for any obsolescence notices as this product line may have limited availability.

Selection Notes

Select the MAX6161AESA when a stable 1.25V reference is required for space-constrained designs. Its low dropout voltage allows operation close to the output level. The micropower consumption makes it suitable for battery-operated systems where extending life is critical. Consider the 4mA sourcing capability for driving moderate loads directly.

Part Context

This component belongs to the MAX6161–MAX6168 series of precision voltage references. All members share identical pinouts, packages, and core technologies but differ in fixed output voltages ranging from 1.25V to 5V. The MAX6161 specifically provides the lowest voltage option in this lineup, catering to low-voltage logic and sensor interfaces.

Replacement Considerations

Direct substitutes include other MAX616x variants if a different voltage is acceptable, such as MAX6166AESA+ for 2.5V. Cross-family replacements require verifying pin compatibility and electrical specifications against the original requirements.

FAQ

Does the MAX6161AESA require an external capacitor for stability?

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

What is the maximum load current the MAX6161AESA can handle?

The MAX6161AESA can typically source 4mA and sink 2mA of load current.