MAX6161BESA+

Overview

The MAX6161BESA+ is a precision, low-dropout, micropower series 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 of source current or 2mA of sink current. The device features a maximum initial accuracy of ±4mV and a temperature coefficient of 15ppm/°C. Quiescent supply current is typically 100µA. It is housed in an 8-pin SO package and functions reliably across an extended temperature range of -40°C to +85°C.

Feature Summary

• Proprietary curvature-correction circuitry combined with laser-trimmed thin-film resistors ensures high precision and stability.
• Internally compensated design eliminates the need for external compensation capacitors, reducing board space requirements.
• Supply current remains virtually independent of the input voltage, maximizing efficiency in battery-powered applications.
• Capable of sourcing 4mA and sinking 2mA load currents while maintaining stable operation.

Applications

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

Procurement Notes

Verify that the component matches the exact part number MAX6161BESA+. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the package type is 8-SOIC. Check RoHS compliance status if required by your manufacturing standards. Validate the operating temperature range specifications against your system requirements before finalizing procurement.

Selection Notes

Select this component when a fixed 1.25V reference is required with high accuracy and low power consumption. Consider the 4mA source current limit compared to other family members offering 5mA. Evaluate the 15ppm/°C temperature coefficient against stricter drift requirements. The internal compensation simplifies layout but requires checking transient response needs for specific load conditions.

Part Context

This device belongs to the MAX6161–MAX6168 family of precision, micropower, low-dropout voltage references. All members share similar architectural benefits, including low quiescent current and high output drive capability. The MAX6161 specifically provides the lowest voltage option in the series at 1.25V, making it suitable for low-voltage systems where minimal dropout voltage is critical.

Replacement Considerations

The MAX6161BESA+ is functionally interchangeable with other MAX6161 variants differing only in accuracy grades, such as MAX6161AESA+, which offers tighter initial accuracy and lower temperature coefficient. Verify pin compatibility and electrical specifications match before substitution.

FAQ

Does the MAX6161BESA+ 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 source current for the MAX6161BESA+?

The MAX6161BESA+ can source up to 4mA of load current.

How does the supply current behave relative to input voltage changes?

The quiescent supply current is virtually independent of the supply voltage, varying by only 8µA/V maximum.