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MAX35103

MAX35103

Reduced Power Time-to-Digital Converter with AFE, RTC, and Flash

Accurate Low Flow Measurement with Lowest System Power Consumption

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Overview

Description

The MAX35103 is a time-to-digital converter with built-in amplifier and comparator targeted as a low-cost analog front-end solution for the ultrasonic heat meter and flow meter markets. It is similar to the MAX35101, but consumes about half the average power and increases the maximum ToF measurement frequency in event timing mode from 2Hz to 16Hz.

With a time measurement accuracy of 20ps and automatic differential time-of-flight (ToF) measurement, this device makes for simplified computation of liquid flow.

Average power consumption is the lowest available with ultra-low 5.5μA ToF measurement and < 125nA duty-cycled temperature measurement.
MAX35103: Typical Application Circuit MAX35103: Typical Application Circuit Enlarge+

Key Features

  • High Accuracy Flow Measurement for Billing and Leak Detection
    • Time-to-Digital Accuracy Down to 20ps
    • Measurement Range Up to 8ms
    • Two Channels: Single-Stop Channel
  • High Accuracy Temperature Measurement for Precise Heat and Flow Calculations
    • Up to Four 2-Wire Sensors
    • PT1000 and PT500 RTD Support
  • Maximizes Battery Life with Low Device and Overall System Power
    • Ultra-Low 5μA ToF Measurement and < 125nA Duty-Cycled Temperature Measurement
    • Event Timing Mode Reduces Host Microcontroller Overhead to Minimize System Power Consumption
    • 2.3V to 3.6V Single-Supply Operation
  • High-Integration Solution Minimizes Parts Count and Reduces BOM Cost
    • 8KB of Nonvolatile Flash Memory for Data Logging
    • Built-in Real Time Clock
    • Small, 5mm x 5mm, 32-Pin TQFP Package
    • -40°C to +85°C Operation

Applications/Uses

  • Ultrasonic Gas Meters
  • Ultrasonic Heat Meters
  • Ultrasonic Water Meters

Parametric Specs

Part NumberSensing ElementPGA GainCalibration MethodOutput TypeICC
(mA)		InterfaceVSUPPLY
(V)		Package/PinsBudgetary
Price
typSee Notes
MAX35103 Ultrasonic Piezoelectric TransducerFixedExternal microcontrollerDigital0.006SPI2.3 to 3.6
TQFP/32
$4.73 @1k
See All Sensor Signal Conditioners (10)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources


MAX35103EVKIT: Evaluation Kit for the MAX35103
MAX35103EVKIT2: Evaluation Kit for the MAX35103/MAX32620

Technical Documents

App Note 6385 How to Collect Data from an Embedded System for Use in MATLAB
App Note 6357 Dealing with Bubbles
App Note 6226 Let Them Drink Beer, or Try Ultrasonic Meters
App Note 6107 Using the MAX35101 in a Heat Meter Application
App Note 6106 MAX35101, MAX35102, MAX35103 Frequently Asked Questions
App Note 6105 Configuring the MAX35101 Time-to-Digital Converter as an Ultrasonic Water Meter
App Note 6104 Calibration of Water Flow Rate in an Ultrasonic Flow Meter Using the MAX35101

Quality and Environmental Data

Product Reliability Reports: MAX35103.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX35103EHJ+
  • MAX35103EHJ+T
    •

    Quality And Environmental

    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

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    Technical Docs

    Reference Designs

    Type ID Title
    Evaluation Board9576MAX35103EVKIT2 Evaluation Kit for the MAX35103/MAX32620
    Evaluation Board8684MAX35103EVKIT Evaluation Kit for the MAX35103

    Events


    Belle Isle 2020
    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

    RSVP