MAX6168AESA

Overview

The MAX6168AESA is a precision, micropower, low-dropout voltage reference from the MAX6161–MAX6168 series. It provides a fixed output voltage of 1.8V with an initial accuracy of ±0.11% and a maximum temperature coefficient of 5ppm/°C. The device operates within an input voltage range of 2.5V to 12.6V and supports a maximum shunt current of 5mA. It features a proprietary curvature-correction circuit and laser-trimmed thin-film resistors for high stability. The component is housed in an 8-pin SOIC package and functions across an extended temperature range of -40°C to +85°C.

Feature Summary

• Utilizes proprietary curvature-correction circuitry and laser-trimmed thin-film resistors for enhanced stability
• Operates as a low-dropout device requiring minimal headroom between input and output voltages
• Delivers high initial accuracy with a maximum temperature coefficient of 5ppm/°C over the extended industrial temperature range

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Battery-powered instrumentation systems requiring low quiescent current
• Portable measurement devices utilizing micropower specifications

Procurement Notes

Verify the specific suffix designation when ordering, as the base model may be available in tape-and-reel or tube packaging variants. Confirm RoHS compliance status, as non-compliant versions exist without the plus sign. Ensure the selected part matches the required output voltage and package type for your design. Cross-reference the manufacturer datasheet for the latest availability and lead time information directly from Analog Devices.

Selection Notes

Select this component when a stable 1.8V reference is required with low power consumption. The 5mA load capability supports moderate drive requirements without external buffering. Consider the 8-SOIC package constraints for PCB layout. Compare against other series members like MAX6167 or MAX6166 if different output voltages such as 4.5V or 2.5V are needed instead.

Part Context

This part belongs to the MAX6161–MAX6168 family of precision voltage references. The family shares common internal architecture but offers various fixed output voltages ranging from 1.25V to 5V. All members feature similar micropower characteristics and low-dropout performance. The MAX6168 specifically targets applications needing a 1.8V rail with high precision.

Replacement Considerations

Direct substitutes include other members of the MAX616x series with identical packages and pinouts but different output voltages, such as MAX6167AESA+ (4.5V) or MAX6166AESA+ (2.5V). Verify that the system can tolerate the voltage difference before swapping.