MAX35104
Gas Flow Meter SoC
Industry's First Integrated SOC Designed to Address the Unique Requirements of Natural Gas Meters
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Overview
Features and Benefits
- Time-to-Digital Accuracy Down to 700ps Measurement Range Up to 8ms
- 2 Channels: Single-Stop Channel
- One 2-Wire Sensor: PT1000, PT500 RTD, and Thermistor Support
- Ultra-Low 62µA TOF Measurement and 125nA Duty-Cycled Temperature Measurement
- Event Timing Mode with Randomizer Reduces Host µC Overhead to Minimize System Power Consumption
- 2.3V to 3.6V Single-Supply Operation
- Built-In Real-Time Clock
- Small, 5mm x 5mm, 40-Pin TQFN Package
- -40°C to +85°C Operation
Product Details
The MAX35104 is a gas flow meter system-on-chip (SoC) targeted as an analog front-end solution for the ultrasonic gas meter and medical ventilator markets. With a time measurement accuracy of 700ps and automatic differential time of flight (TOF), the device makes for simplified computation of gaseous flow.
Power consumption is the lowest available with ultra-low 62µA time-of-flight measurement and 125nA duty-cycled temperature measurement. Multi-hit (up to six per wave) capability with stop-enable windowing allows the device to be fine-tuned for the application. Internal analog switches, a configurable three-stage integrated operational amplifier chain amplifier, and an ultra-low input offset comparator provide the analog interface and control for a minimal electrical bill of material solution. A programmable high-voltage (up to 30V) pulse launcher provides up to 19dB of transducer launch amplitude adjustment to compensate for transducer aging and temperature, pressure, humidity affects. Early edge detection ensures measurements are made with consistent wave patterns to greatly improve accuracy and eliminate erroneous measurements. Built-in arithmetic logic unit provides TOF difference measurements and programmable receiver hit accumulators to minimize the host microprocessor access. For temperature measurement, the device supports a single 2-wire PT1000 platinum resistive temperature detector (RTD) or NTC thermistor. A simple 4-wire SPI interface allows any microcontroller to effectively configure the device for its intended measurement.
Applications
- Medical Ventilators
- Ultrasonic Gas Meters
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
Tools & Simulations
Software Development
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX35104ETL+ | Material Declaration | Reliability Data | 40-LFCSP-5X5X0.75 | |
| MAX35104ETL+T | Material Declaration | Reliability Data | 40-LFCSP-5X5X0.75 | |
| Wafer Fabrication Data |
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MAX35104 Discussions
Sample & Buy
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Buy Now Pricing
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List Pricing
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.