Texas Instruments MSP430FR6047IPZ

Overview

MSP430FR6047IPZ from Texas Instruments is an ultrasonic sensing system-on-chip (SoC) microcontroller optimized for battery-powered water metering. It integrates a programmable pulse generator (PPG), 4-Ω ultrasonic transducer driver, <5-ps time measurement resolution, 12-bit sigma-delta ADC (SDHS) at up to 8 Msps, and low-energy accelerator (LEA) for FFT-based flow computation - enabling sub-liter-per-hour detection with <25-ps dTOF accuracy in ISO 4064–compliant meters.

For engineers reviewing the MSP430FR6047IPZ datasheet, MSP430FR6047IPZ pinout, MSP430FR6047IPZ application, or MSP430FR6047IPZ equivalent, key selection criteria include ultrasonic time-of-flight precision, FRAM endurance (10¹⁵ writes), LPM3.5 current (450 nA with RTC), USS module integration, and 100-pin LQFP package compatibility with EVM430-FR6047 reference hardware.

Technical Context

The MSP430FR6047IPZ implements a dedicated ultrasonic sensing subsystem (USS) with independent PPG, PHY, PGA (–6.5 dB to 30.8 dB), and SDHS ADC - all synchronized under a high-stability PLL (68–80 MHz). Signal processing offload is handled by the LEA coprocessor, executing 256-point complex FFT independently of the 16-MHz CPUXV2 core.

Its power architecture supports ultra-low-power operation across modes: 120 µA/MHz active, 450 nA in LPM3.5 (RTC + USS standby), and 30 nA in LPM4.5 shutdown - enabled by integrated LDO, SVS, and ferroelectric memory that eliminates write-erase cycles and reduces energy per data update.

Key Specifications

Pinout & Package

LQFP-100 package (14 mm × 14 mm), thermally enhanced with exposed thermal pad; pin-compatible with MSP430FR60471IPZ and MSP430FR6045IPZ variants.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrasonic sensing applications.

Compared with MSP430FR60471IPZ, the MSP430FR6047IPZ offers UART BSL for serial programming and debug; compared with MSP430FR6037IPZ, it provides full on-chip ultrasonic signal chain - making it the sole option for certified, single-chip ultrasonic water meter designs.

Availability

MSP430FR6047IPZ is available at Aetrix Electronics and suitable for ultrasonic water metering, heat metering, and liquid-level sensing applications requiring stable component supply, long-term lifecycle assurance, and metrological traceability.

Supply support for MSP430FR6047IPZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.

The MSP430FR604x product line was designed specifically for ultrasonic flow measurement in utility metering - integrating metrology-grade timing, low-power signal acquisition, and FRAM-based data logging into a single SoC.

FAQ

What is the primary metrological standard compliance of the MSP430FR6047IPZ?

The MSP430FR6047IPZ is designed to comply with and exceed ISO 4064, OIML R49, and EN 1434 accuracy standards for water and heat meters. Its <25-ps differential time-of-flight accuracy, integrated USS module, and MTIF hardware enable certified Class C meter implementations without external calibration hardware. The MSP430FR6047IPZ achieves this through on-chip high-stability timing, low-noise analog front-end, and deterministic signal processing via LEA.

Does the MSP430FR6047IPZ support direct connection to standard ultrasonic transducers?

Yes, the MSP430FR6047IPZ supports direct interface to industry-standard ultrasonic transducers operating up to 2.5 MHz. Its integrated USS PHY provides a 4-Ω low-impedance output driver and programmable pulse generation (PPG), eliminating the need for external HV drivers or matching networks. The MSP430FR6047IPZ also includes dedicated CHx_IN/CHx_OUT pins and isolated PVCC/PVSS rails to maintain signal integrity during excitation and echo capture.

How does the LEA coprocessor in the MSP430FR6047IPZ improve ultrasonic flow computation efficiency?

The LEA coprocessor in the MSP430FR6047IPZ executes 256-point complex FFT up to 40× faster than the CPU alone, enabling real-time Doppler or cross-correlation flow algorithms without CPU intervention. This reduces active-mode current draw and extends battery life in portable metering applications. The MSP430FR6047IPZ allocates 4 KB of shared RAM for LEA operations, and its instruction set is optimized for fixed-point signal processing common in ultrasonic time-of-flight analysis.

What is the role of the MTIF module in the MSP430FR6047IPZ?

The MTIF (Metering Test Interface) module in the MSP430FR6047IPZ provides hardware-level pulse generation and counting for metrological verification and type-approval testing. It supports pulse rates up to 1016 p/s and 16-bit counting capacity, and operates in LPM3.5 at 200 nA typical - allowing continuous test-mode operation during battery-powered validation. The MSP430FR6047IPZ exposes MTIF_OUT_IN and MTIF_PIN_EN pins for direct connection to test equipment or billing interfaces per EN 1434 requirements.

Can the MSP430FR6047IPZ operate from a single lithium primary cell over its full discharge curve?

Yes, the MSP430FR6047IPZ operates across a 1.8 V to 3.6 V supply range, matching the nominal 3.6 V to 2.0 V discharge profile of ER-series lithium thionyl chloride cells. Its integrated LDO, SVS, and ultra-low-power modes (450 nA LPM3.5, 30 nA LPM4.5) ensure stable operation throughout the battery's service life. The MSP430FR6047IPZ maintains full USS functionality and FRAM write capability down to 1.8 V, enabling >10-year deployment in sealed water meters without voltage regulation.