MAX35103EHJ+

Sensor And Detector Interfaces Overview

The MAX35103EHJ+ is a time-to-digital converter with an integrated analog front-end, real-time clock, and flash memory. It operates on a single supply voltage ranging from 2.3V to 3.6V. The device provides a time measurement accuracy of 20ps with a resolution of 3.8ps and a measurement range up to 8ms. Average power consumption is 5.5µA during ToF measurement and less than 125nA in duty-cycled temperature mode. It features an 8KB nonvolatile flash for data logging and supports up to four 2-wire RTD sensors.

Sensor And Detector Interfaces Feature Summary

• Integrated analog front-end with built-in amplifier and comparator for ultrasonic flow metering
• Event timing mode reduces host microcontroller overhead to minimize system power consumption
• Supports up to four 2-wire PT1000/PT500 platinum resistive temperature detectors
• Includes 8KB nonvolatile flash memory for data logging and a built-in real-time clock

Sensor And Detector Interfaces Applications

• Ultrasonic heat meters
• Ultrasonic water meters
• Ultrasonic gas meters
• High-accuracy flow measurement for billing and leak detection

Sensor And Detector Interfaces Procurement Notes

Verify the specific package type required for the application, as the MAX35103 series is available in both TQFP and TQFN packages. Confirm that the EHJ suffix corresponds to the 32-pin TQFP variant when sourcing components. Ensure compatibility with the host system's SPI interface requirements before finalizing procurement decisions.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring ultra-low power consumption in battery-operated ultrasonic metering systems. The device is suitable where high integration minimizes bill-of-material costs. Consider the 20ps accuracy and automatic differential ToF measurement capabilities for precise liquid flow computation without complex external circuitry.

Sensor And Detector Interfaces Part Context

The MAX35103EHJ+ belongs to the MAX35103 family of reduced power time-to-digital converters. It is similar to the MAX35101 but consumes approximately half the average power and increases the maximum ToF measurement frequency in event timing mode from 2Hz to 16Hz. It serves as a low-cost analog front-end solution for ultrasonic heat and flow meter markets.

Sensor And Detector Interfaces Replacement Considerations

The MAX35101 is a comparable device within the same family. However, it has higher average power consumption and a lower maximum ToF measurement frequency of 2Hz compared to the 16Hz capability of the MAX35103.