Texas Instruments MSP430FR504x Ultrasonic Sensing MCUs

Texas Instruments MSP430FR504x Ultrasonic Sensing MCUs are 16MHz without LCD MSP430™ microcontrollers for gas and water flow metering applications. These MSP430FR504x MCUs offer an integrated Ultrasonic Sensing Solution (USS_A) module that provides high accuracy for a wide range of flow rates. The MSP430FR504x MCUs are supported by extensive hardware and software ecosystems with reference designs. These MCUs are robust, highly integrated devices for ultrasonic water, heat, and gas meters. The Texas Instruments MSP430FR504x MCUs gas flow achieves ±1% accuracy up to 12000 liters/hour with a wide dynamic range of 200:1. These ultrasonic sensing MCUs offer optimized ultra-low-power modes such as active mode, standby mode with Real-Time Clock (RTC), and shutdown. Applications include ultrasonic smart water meters, ultrasonic smart gas meters, ultrasonic smart heat meters, and flow transmitters.

Features

Best-in-class ultrasonic water and gas flow measurement with ultra-low power consumption
- Underwater:
  - ±12.5ps differential Time of Flight (dToF) accuracy at low to high flow rates and across the operating temperature
  - Achieves ±1% accuracy for a wide dynamic range of 500:1
  - Ability to measure a maximum flow rate of 8800 liters/hour (40 gallons/minute) on 25mm diameter pipe
  - Ability to detect a minimum flow rate of < one liter/hour (0.005 gallons/minute)
  - A high-precision time measurement resolution of <5ps
  - Approximately 3µA overall current consumption with one set of results per second
  - Ability to support wide pipe sizes with 15mm to 1000mm diameter
- Under gas:
  - ±250ps differential Time of Flight (dToF) accuracy at low to high flow rates and across the operating temperature
  - Achieves ±1% accuracy up to 12000 liters/hour with a wide dynamic range of 200:1
  - Ability to measure a flow rate > 25000 liters/hour
  - Ability to detect a minimum flow rate of < three liters/hour
  - A high-precision time measurement resolution of < 100ps
  - Approximately 20µA overall current consumption with 1 set of results per second

Intelligent digital peripherals
Low-Energy Accelerator (LEA)
Ability to directly interface standard ultrasonic sensors (up to 2.5MHz)
Integrated analog front end - USS_A
Metering Test Interface (MTIF)
- A pulse generator and pulse counter
- Pulse rates up to 1024 pulses per second (p/s)
- Count capacity up to 65535 (16-bit)
- Operates in LPM3.5 with 200nA (typical)
Embedded microcontroller
- 16-bit RISC architecture up to 16MHz clock
- 1.8V to 3.6V wide supply voltage range
High-performance analog
- 12-channel analog comparator
Flexible clock system
- Fixed-frequency DCO with ten selectable factory-trimmed frequencies
- Low-power low-frequency internal clock source (VLO)
- 32kHz crystals (LFXT)
- High-Frequency crystals (HFXT)