MAX1441GUP/V+

Sensor And Detector Interfaces Overview

The MAX1441GUP/V+ is a proximity and touch sensor integrated circuit designed for automotive passive remote keyless entry (PRKE) systems. It features two independent capacitive sensing channels with an internal MAXQ microcontroller providing 2k words of flash and 128 bytes of SRAM. The device operates within a supply voltage range of 5V to 28V, supporting up to 45V overvoltage protection. Key electrical parameters include a typical operating current of 100µA, a digital resolution of 1.2fF per LSB, and programmable sensor excitation frequencies between 100kHz and 500kHz. It offers ±2kV ESD protection on sensor I/O lines and functions reliably across an industrial temperature range of -40°C to +105°C.

Sensor And Detector Interfaces Feature Summary

• Integrates a MAXQ microcontroller for customized signal processing and discrimination algorithms without external host dependency.
• Supports grounded electrode capacitive sensing with active-guard outputs to shield sense electrodes from unwanted interference sources.
• Features spread-spectrum techniques in the sensor excitation circuit to reduce electromagnetic emissions and susceptibility to interfering signals.

Sensor And Detector Interfaces Applications

• Capacitive proximity sensing in automotive passive remote keyless entry (PRKE) systems.
• Object detection systems requiring high-resolution capacitance measurement.
• Touch sensor interfaces utilizing independent offset compensation for each input channel.

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix GUP against the official Analog Devices datasheet to confirm package type and temperature grade. Ensure compatibility with the target system's voltage levels, as the device supports up to 28V operation with 45V overvoltage tolerance. Confirm that the JTAG interface requirements align with the manufacturing programming infrastructure. Check for any RoHS compliance documentation relevant to the specific batch date code.

Sensor And Detector Interfaces Selection Notes

Select this component when designing PRKE systems requiring integrated sensing and processing capabilities. The internal microcontroller reduces external component count compared to discrete solutions. Consider the 20-TSSOP package constraints for PCB layout. Evaluate the need for the specific 1.2fF resolution and programmable frequency ranges against environmental noise conditions. Verify that the 100µA operating current fits the vehicle's standby power budget requirements.

Sensor And Detector Interfaces Part Context

This part belongs to the Maxim Integrated automotive sensor portfolio, now under Analog Devices. It is specifically engineered for capacitive sensing applications in harsh automotive environments. The integration of the MAXQ core distinguishes it from simple analog front-end sensors by allowing on-chip algorithm execution. It serves as a dedicated solution for detecting hand presence near vehicle door handles or interior controls.

Sensor And Detector Interfaces Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the official Analog Devices replacement guide or contact technical support directly for qualified alternatives. Do not assume pin-to-pin compatibility with other Maxim sensor ICs without verifying the specific datasheet specifications.