MAX9926UAEE+

Sensor And Detector Interfaces Overview

The MAX9926UAEE+ is a dual-channel variable reluctance sensor interface device designed for automotive position and speed sensing applications. It integrates precision amplifiers, comparators, and adaptive peak threshold circuits to generate robust output pulses from weak or noisy VR signals. The device operates on a single 4.5V to 5.5V supply with a typical current consumption of 4.7mA. It features differential inputs, an open-drain comparator output, and a rotational direction output. The component is specified over the -40°C to +125°C temperature range and is housed in a 16-pin QSOP package.

Sensor And Detector Interfaces Feature Summary

• Differential input stage provides enhanced noise immunity
• Precision amplifier and comparator allow small-signal detection
• User-enabled internal adaptive peak threshold or flexible external threshold
• Zero-crossing detection provides accurate phase information

Sensor And Detector Interfaces Applications

• Camshaft VRS interfaces
• Crankshaft VRS interfaces
• Vehicle speed VRS interfaces

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and environmental compliance. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Confirm that the received components match the exact part number designation before integration into production systems.

Sensor And Detector Interfaces Selection Notes

Select this component when dual-channel variable reluctance signal conditioning is required. It is suitable for applications needing rotational direction detection via the DIRN pin. Consider the fixed 1V/V gain of the integrated differential amplifiers during system design. Evaluate the need for automotive-grade qualification if operating in harsh environments.

Sensor And Detector Interfaces Part Context

This device belongs to the MAX9924–MAX9927 family of variable reluctance sensor interfaces. The MAX9926 serves as the dual-channel counterpart to the single-channel MAX9924. Both share similar functional blocks but differ in channel count and package options. The family is optimized for automotive crankshaft and camshaft sensing applications.

Sensor And Detector Interfaces Replacement Considerations

The MAX9924UAEE+ is not a direct replacement due to channel differences. Verify compatibility with MAX9927AEE+ if external gain setting is preferred. Check pinout and electrical specifications carefully before substituting any other sensor interface ICs.

Sensor And Detector Interfaces FAQ

What is the function of the DIRN pin?

The DIRN pin provides a rotational direction output for quadrature-connected VR sensors. It indicates whether input IN1 leads or follows input IN2.

How does the adaptive peak threshold work?

The adaptive peak threshold sets the trigger level to one-third of the previous cycle's peak voltage. This adjusts dynamically to signal amplitude changes, preventing false triggers from noise or broken teeth.

Can the MAX9926 interface with legacy single-ended VR sensors?

Yes, the device can interface with both new-generation differential VR sensors and legacy single-ended VR sensors.