Texas Instruments MSP430F47166IPZR

Overview

MSP430F47166IPZR from Texas Instruments is an ultralow-power mixed-signal microcontroller designed for poly-phase electricity metering. It integrates six 16-bit sigma-delta ADCs with differential PGA inputs, 92KB Flash/4KB RAM, 16-bit RISC CPU, four USCI modules (UART/IrDA/SPI/I²C), and integrated LCD driver supporting up to 160 segments. It operates from 1.8 V to 3.6 V and achieves active-mode current of 350 µA at 1 MHz and 2.2 V.

For engineers reviewing the MSP430F47166IPZR datasheet, MSP430F47166IPZR pinout, MSP430F47166IPZR application, or MSP430F47166IPZR equivalent, key selection criteria include its six-channel high-resolution ADC architecture, LCD segment drive capability, real-time clock support via Basic Timer, and low-power operation across five configurable sleep modes - all critical for energy meter firmware development and hardware validation.

Technical Context

The MSP430F47166IPZR implements a 16-bit RISC CPU with constant generators and 16 general-purpose registers, enabling single-cycle register operations and optimized code density. Its FLL+ module provides fast wake-up (<6 µs) from LPM3/LPM4 using ACLK, while the digitally controlled oscillator (DCO) ensures stable timing without external crystals for basic operation.

It features three-channel internal DMA for autonomous data movement between peripherals and memory, reducing CPU load during high-throughput ADC sampling. The SD16_A module supports programmable gain amplification and differential input pairs on all six ADC channels, with dedicated analog pins (A0.0± through A5.0±) routed to physical package terminals 1–15 (excluding AVSS/VREF).

Key Specifications

Pinout & Package

Package: 100-pin plastic QFP (PZ), RoHS-compliant, 0.5 mm pitch, 14 mm × 14 mm body size.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal microcontroller applications.

Compared with MSP430F47176IPZR and MSP430F47186IPZR, the MSP430F47166IPZR offers optimal cost-performance balance for fixed-function Class 0.5 meters where 4KB RAM suffices and Flash headroom is reserved for certified metrology code only.

Availability

MSP430F47166IPZR is available at Aetrix Electronics and suitable for smart electricity metering, industrial power monitoring, and prepayment meter applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MSP430F47166IPZR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.

The MSP430F471xx product line was engineered specifically for poly-phase electricity metering, integrating metrology-grade ADCs, LCD drivers, and ultra-low-power operation to meet IEC 62053 and ANSI C12 standards.

FAQ

What is the maximum ADC sampling rate supported by the MSP430F47166IPZR?

The MSP430F47166IPZR's SD16_A module supports up to 128 ksps aggregate throughput across all six channels. Each 16-bit sigma-delta ADC achieves effective sampling rates of ~21 ksps per channel when oversampled at 256×, meeting IEC 62053-22 requirements for Class 0.2/0.5 meters. Actual usable rate depends on PGA gain setting and digital filter configuration per TI SLAU056 Section 12.3.

Does the MSP430F47166IPZR support hardware encryption for secure firmware updates?

The MSP430F47166IPZR does not include dedicated cryptographic accelerators or AES engines. Security relies on programmable code protection via the security fuse and bootloader-level access control. For secure firmware updates, external secure elements (e.g., TI TPS6598x) or host-side authentication must be implemented. The device supports serial onboard programming but lacks on-die encryption keys or TRNG.

Can the MSP430F47166IPZR drive a 4×40 segment LCD without external components?

Yes, the MSP430F47166IPZR integrates a full LCD controller with internal charge pump and contrast control circuitry. It directly drives 4 commons (COM0–COM3) and up to 40 segments per common (160 total) using internal voltage steps. No external capacitors or bias resistors are required beyond the single LCDCAP connection (Pin 63), per TI SLAS626C Section 8.1.

What is the wake-up time from LPM4 to active mode for the MSP430F47166IPZR?

The MSP430F47166IPZR wakes up from LPM4 to active mode in less than 6 µs when triggered by an interrupt source such as RTC alarm, GPIO edge, or USCI receive event. This specification is guaranteed across the full temperature range (–40°C to 85°C) and supply voltage (1.8 V to 3.6 V), as verified in TI SLAS626C Section 3.2.

How many independent UART interfaces does the MSP430F47166IPZR provide?

The MSP430F47166IPZR provides two independent UART interfaces via USCI_A0 and USCI_A1 modules. Each supports full-duplex asynchronous communication, auto-baudrate detection, IrDA encoding/decoding, and synchronous SPI. They operate concurrently and can be assigned to separate physical pins (e.g., P1.6/P1.7 and P2.4/P2.5) without resource conflict.