MAX35104
PRODUCTIONGas Flow Meter SoC
Industry's First Integrated SOC Designed to Address the Unique Requirements of Natural Gas Meters
- Part Models
- 2
- 1ku List Price
- Starting From $8.27
Part Details
- 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
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
Documentation
Data Sheet 1
Technical Articles 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX35104ETL+ | 40-LFCSP-5X5X0.75 | ||
| MAX35104ETL+T | 40-LFCSP-5X5X0.75 |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
Software Development 3
Evaluation Kits
Evaluation Kit for the MAX35104
Evaluation Kit for the MAX35104