MAX35101
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MAX35101

Time-to-Digital Converter with Analog Front-End

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Accurate Low Flow Measurement with Low System Power Consumption

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $5.17
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 (4) 2-Wire Sensors
    • PT1000 and PT500 RTD Support
  • Maximizes Battery Life with Low Device and Overall System Power
    • Low 10µA ToF measurement and < 125nA Duty-Cycled Temperature Measurement
    • Event Timing Mode Reduces Host µC
  • Overhead to Minimize System Power Consumption
    • 2.3V to 3.6V Single-Supply Operation
  • High-Integration Solution Minimizes Parts Countand 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
Additional Details
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The MAX35101 is a time-to-digital converter with built-in amplifier and comparator targeted as a complete analog front-end (AFE) solution for the ultrasonic heat meter and flow meter markets.

With a time measurement accuracy of 20ps and automatic differential time-of-flight (TOF) measurement, this device makes for simplified computation of liquid flow. Early edge detection ensures measurements are made with consistent wave patterns to greatly improve accuracy and eliminate erroneous measurements.

Multihit capability with stop-enable windowing allows the device to be fine-tuned for the application. Internal analog switches, an autozero amplifier/comparator, real-time clock (RTC), and programmable receiver sensitivity provide the analog interface and control for a minimal electrical bill of material solution. The RTC provides an event timing mode that is configurable and runs cyclic algorithms to minimize microprocessor interactivity and increase battery life.

Built-in arithmetic logic unit provides TOF difference measurements. A programmable receiver hit accumulator can be utilized to minimize the host microprocessor access and thus minimize current consumption.

For temperature measurement, the MAX35101 supports up to four (4) 2-wire PT1000/500 platinum resistive temperature detectors (RTD).

A simple 4-wire SPI interface allows any microcontroller to effectively configure the device for its intended measurement.

On-board 8KB user flash allows the MAX35101 to be nonvolatile-configurable and provide nonvolatile energy use data to be logged. Configuration can be recalled anytime with a SPI command. 

Applications

  • Ultrasonic Gas Meters
  • Ultrasonic Heat Meters
  • Ultrasonic Water Meters
Part Models 2
1ku List Price Starting From $5.17

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX35101EHJ+
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MAX35101EHJ+T
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Product Lifecycle

PCN

Apr 13, 2020

- 2040

TEST

MAX35101EHJ+

PRODUCTION

MAX35101EHJ+T

PRODUCTION

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Part Models

Product Lifecycle

PCN

Apr 13, 2020

- 2040

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TEST

MAX35101EHJ+

PRODUCTION

MAX35101EHJ+T

PRODUCTION

Evaluation Kit

Evaluation Kits 1

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EV-FLOWMETER-ARDZ

Low-Power Heat and Flow Measurement Sensor

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EV-FLOWMETER-ARDZ

Low-Power Heat and Flow Measurement Sensor

Low-Power Heat and Flow Measurement Sensor

Features and Benefits

  • High Accuracy Flow Measurement for Billing and Leak Detection
    • Time-to-Digital accuracy down to 20 ps
    • Measurement range up to 8 ms
    • Two Channels: single-stop channel
  • High Accuracy Temperature Measurement for Precise Heat and Flow Calculations
    • Up to four (4) 2-wire sensors
    • PT1000 and PT500 RTD support
  • Maximizes Battery Life with Low Device and Overall System Power
    • Low 10 μA ToF measurement and <125 nA duty-cycled temperature measurement
    • Event-timing mode reduces host microcontroller

Product Detail

The EV-FLOWMETER-ARDZ sensor is an advanced and efficient solution for flow measurement, suitable for utility and industrial applications. The ultrasonic time-of-flight technology, coupled with the integrated functions of the MAX35101 Time-to-Digital Converter, addresses the limitations of mechanical flow meters and offers improved accuracy and longevity.

This reference design serves as a platform for developing customized heat or flow meters.

APPLICATIONS

  • Ultrasonic Heat Meters
  • Ultrasonic Water Meters
  • Ultrasonic Gas Meters
  • Utility Metering
  • Environmental Monitoring
Reference Designs

Reference Designs 1

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