MAX6166AESA

Overview

The MAX6166AESA+T is a precision, micropower, low-dropout voltage reference providing a fixed 2.5V output in an 8-pin SO package. It operates within an input voltage range of VOUT + 0.2V to 12.6V and maintains specifications across the -40°C to +85°C temperature range. The device features a maximum initial accuracy of ±2mV and a temperature coefficient of 5ppm/°C (max). Typical quiescent supply current is 100µA with a maximum variation of 8µA/V. It can source up to 5mA or sink 2mA of load current without requiring external compensation capacitors.

Feature Summary

• Proprietary curvature-correction circuit combined with laser-trimmed thin-film resistors ensures high precision and stability.
• Internally compensated design eliminates the need for external frequency-stability capacitors, reducing board space requirements.
• Supply current remains virtually independent of the input voltage, maximizing efficiency in battery-operated systems.

Applications

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

Procurement Notes

Verify the specific suffix 'A' indicates the required initial accuracy and temperature coefficient grade. Confirm the '+T' designation corresponds to the intended reel packaging format. Ensure the component meets RoHS compliance standards as indicated by the '+' symbol. Cross-reference the manufacturer's latest ordering information to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select this part when a stable 2.5V reference is needed with minimal power consumption. The low dropout voltage allows operation from supply rails close to the output voltage. Consider the 5mA sourcing capability for driving moderate loads directly. Verify that the 8-pin SO package footprint fits the target PCB layout constraints.

Part Context

This component belongs to the MAX6161–MAX6168 family of precision voltage references. All members share identical pinouts, package styles, and core architectural features, differing primarily in their fixed output voltage options. The MAX6166 specifically provides the 2.5V variant within this series.

Replacement Considerations

Other members of the MAX6161–MAX6168 family are pin-compatible but offer different fixed output voltages. Direct substitutes must match the 2.5V output requirement. Verify that any alternative device maintains similar quiescent current and accuracy specifications for the application.

FAQ

Does the MAX6166 require an external capacitor for stability?

No, the device is internally compensated and does not require an external capacitor for frequency stability, though a small capacitor may improve transient response.

What is the minimum input voltage required for proper operation?

The input voltage must be at least VOUT + 0.2V, meaning a minimum of 2.7V for the 2.5V output version.