MAX6161BESA

Overview

The MAX6161BESA+ is a precision, low-dropout, micropower voltage reference with a fixed output of 1.25V. It operates within an input voltage range of 2.5V to 12.6V and delivers up to 4mA source current or 2mA sink current. The device features a maximum initial accuracy of ±0.32% (±4mV) and a temperature coefficient of 15ppm/°C (max). Quiescent supply current is typically 150µA. It utilizes proprietary curvature-correction circuitry and laser-trimmed thin-film resistors for stability.

Feature Summary

• Proprietary curvature-correction circuit combined with laser-trimmed thin-film resistors ensures high precision and low temperature drift.
• Low quiescent supply current that remains virtually independent of the supply voltage, maximizing efficiency in battery-powered systems.
• Internally compensated design eliminates the need for external compensation capacitors, saving board space.
• Capable of sourcing 4mA and sinking 2mA load current while maintaining stable operation with minimal dropout voltage.

Applications

• Analog-to-Digital Converters (ADCs)
• Portable Battery-Powered Systems
• Precision +3V/+5V Systems

Procurement Notes

Verify the specific suffix 'B' indicates the required initial accuracy and temperature coefficient grade. Confirm the package type matches the design footprint requirements. Ensure the operating environment stays within the specified -40°C to +85°C temperature range. Check RoHS compliance status if required by manufacturing standards. Validate input voltage constraints against the system power supply rails.

Selection Notes

Select this component when a fixed 1.25V reference is needed with high precision and low power consumption. Consider the B-grade specifications for tighter accuracy limits compared to A-grade variants. Evaluate the 4mA sourcing capability against the application's load requirements. Assess the trade-off between the internal compensation benefits and potential transient response needs.

Part Context

This part belongs to the MAX6161–MAX6168 family of precision voltage references. All members share similar architectures but offer different fixed output voltages ranging from 1.25V to 5V. The family is characterized by micropower operation, low dropout, and high output current capabilities suitable for space-critical applications.

Replacement Considerations

Other members of the MAX6161–MAX6168 series may serve as alternatives if different output voltages are acceptable. Verify pin compatibility and electrical specifications before substitution. Cross-reference with other Maxim Integrated precision reference families if form factor or performance metrics differ significantly.

FAQ

Does the MAX6161 require an external capacitor for stability?

No, the MAX6161 is internally compensated and does not require an external compensation capacitor for frequency stability.

What is the maximum load current the MAX6161 can handle?

The MAX6161 can source up to 4mA and sink up to 2mA of load current.