MSP430I2031TPWR - 16MHz Metering AFE MCU 32KB Flash | TI
N.º de pieza: MSP430I2031TPWR ✓ ActivoMSP430I2031TPWR Descripción general
A metering AFE MCU is a mixed-signal microcontroller that combines an MCU core with high-resolution analog-to-digital conversion on the same die. In the power management hierarchy it sits between generic MCUs and dedicated metrology ASICs, integrating sigma-delta conversion, timing, and computation for energy measurement without external ADCs. The MSP430i20xx family belongs to TI's MSP430 Metrology and Monitoring portfolio.
Key features include the 16-bit RISC CPU with a DCO-based clock system generating up to 16.384 MHz, three independent 24-bit sigma-delta (SD24) converters ideal for simultaneous voltage and current sampling in poly-phase metering, two 16-bit timers, and five low-power modes optimized for extended battery life. The integrated flash-based memory supports field firmware updates for metering products.
Architecturally, the device pairs the CPU16 core with a power management module (PMM) and a flexible clock subsystem, allowing the sigma-delta ADCs to run concurrently with computation for RMS power, energy accumulation, and tariff processing. The 24-bit ADC resolution supports wide dynamic range current sensing via shunt or CT inputs, reducing external component count and calibration effort.
Typical applications include single-phase and poly-phase electricity meters, current-voltage monitoring in industrial equipment, battery-powered measurement instruments, and building automation energy sub-metering, where simultaneous multi-channel sampling and low power consumption are decisive.
Design consideration: budget the sigma-delta ADC sampling rate against CPU headroom at 16.384 MHz, and place the analog inputs away from switching noise; the 2KB RAM constrains buffering depth for multi-channel DSP algorithms.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para MSP430I2031TPWR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
MSP430I2030TPWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MSP430I2041TPWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MSP430I2021TPWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MSP430I2020TPWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MSP430I2040TPWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MSP430I2031TPWR Valores máximos y características eléctricas
| Core | 16-bit RISC CPU (MSP430 CPU16) |
| Frecuencia de reloj máxima | 16.384 MHz |
| Flash Memory | 32KB (32K x 8) |
| RAM | 2KB |
| ADC Resolution | 24-bit sigma-delta (SD24) |
| Number of ADCs | 3 |
| Timers | 2 x 16-bit |
| Temperatura de funcionamiento | -40C to +105C |
| Encapsulado | TSSOP (PW), 28 pins |
| Tipo de montaje | Surface Mount |
| Product Family | MSP430i20xx Metrology and Monitoring |
| Low-Power Modes | 5 low-power modes |
| Clock System | DCO-based clock system |
| Power Management | Integrated PMM (Power Management Module) |
| Estado RoHS | Compliant |
Guía de configuración de pines de MSP430I2031TPWR tssop (pw), 28 pins
Configuración de pines para MSP430I2031TPWR (encapsulado tssop (pw), 28 pins). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para MSP430I2031TPWR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MSP430I2031TPWR es adecuado para 6 aplicacións: Single-Phase Electricity Meters, Industrial Current and Voltage Monitoring, Building Automation Energy Sub-Metering, Battery-Powered Portable Measurement Instruments, Solar Inverter and Power Optimizer Monitoring, EV Charging Station Metering Modules.
Single-Phase Electricity Meters
The MSP430I2031TPWR fits single-phase energy metering because its three 24-bit sigma-delta ADCs simultaneously sample line voltage and current channels with the high dynamic range needed for accurate active and reactive energy computation across a wide load range. The 16.384 MHz RISC CPU performs RMS calculations, frequency measurement, and tariff accumulation in firmware, while 32KB Flash holds metering firmware and calibration tables with field-update capability. The -40C to +105C rating covers sealed utility meter environments, and five low-power modes support battery-backed tamper and RTC operation. With on-chip conversion, external ADCs and their calibration overhead are eliminated, reducing bill of materials cost per meter.
Recomendado
Industrial Current and Voltage Monitoring
In industrial equipment, the MSP430I2031TPWR serves as a compact energy and load monitoring node: the three simultaneous 24-bit sigma-delta ADCs digitize shunt or CT current inputs and a voltage divider input without skew between channels, enabling correct power calculations under distorted waveforms. The 16-bit CPU at 16.384 MHz executes overcurrent detection, power-factor computation, and threshold alarms in real time, and the -40C to +105C operating range suits control-cabinet deployment. Its 28-pin TSSOP keeps the monitoring board small enough for DIN-rail or inside-machine placement. Firmware-based processing allows reconfiguration of measurement ranges and alarm logic without hardware changes.
Recomendado
Building Automation Energy Sub-Metering
For building automation, the MSP430I2031TPWR enables circuit-level sub-metering of lighting, HVAC, and tenant loads. The three 24-bit sigma-delta ADCs sample branch-circuit current and bus voltage with enough resolution to detect standby loads and meter accurately at low currents, where lower-resolution ADCs lose accuracy. The 2KB RAM buffers measurement data for burst transmission over an external UART/SPI link to a gateway, and five low-power modes reduce node consumption when sampling can be duty-cycled. The 32KB Flash stores multiple metering profiles and calibration constants, letting one hardware design serve multiple sub-metering product tiers through firmware variants.
Recomendado
Battery-Powered Portable Measurement Instruments
The MSP430I2031TPWR suits portable instruments such as clamp meters and power-quality analyzers because its five low-power modes and integrated PMM minimize average current draw between measurement bursts. The 24-bit sigma-delta ADCs deliver the precision those instruments require for true-RMS and power measurements, and the 16.384 MHz CPU provides adequate DSP headroom while remaining power-efficient. The 2KB RAM holds sample windows for FFT-based harmonic analysis, and 32KB Flash retains calibration data and logging configuration across battery replacement. Operation from -40C to +105C also allows use in handheld tools exposed to outdoor temperature extremes.
Recomendado
Solar Inverter and Power Optimizer Monitoring
In solar inverters and string monitoring, the MSP430I2031TPWR measures DC and AC side voltages and currents using its three simultaneous-sampling 24-bit sigma-delta ADCs, producing accurate energy-yield and efficiency data that feed MPPT and reporting algorithms. The -40C to +105C rating tolerates rooftop combiner-box temperatures, and the integrated architecture avoids external ADC components in the high-voltage-adjacent isolation zone, simplifying safety design. The 32KB Flash supports firmware field updates after installation, important for fleet-managed solar assets, while the sigma-delta converters reject switching noise from adjacent power stages better than successive-approximation ADCs.
Recomendado
EV Charging Station Metering Modules
The MSP430I2031TPWR fits AC EV charger metering modules, where regulations require accurate energy billing: the three 24-bit sigma-delta ADCs sample phase voltage and current with the precision class required for billing-grade measurement, and the CPU computes demand, power factor, and session energy locally. The -40C to +105C range survives outdoor charging pedestal interiors, and the small 28-pin TSSOP allows a compact metering board that fits behind the charging controller. Flash-based calibration storage supports per-unit factory calibration, and five low-power modes keep standby consumption within always-on charging-station budgets.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MSP430I2031TPWR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MSP430I2030TPWR | MSP430I2041TPWR | MSP430I2021TPWR | MSP430I2020TPWR |
|---|---|---|---|---|---|
| Package | TSSOP-28 (PW) | TSSOP-28 (PW) - same | TSSOP-28 (PW) - same | TSSOP-28 (PW) - same | TSSOP-28 (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Sigma-Delta ADC Channels | 3 x 24-bit | 3 x 24-bit (different gain/mux config) | 4 x 24-bit | 2 x 24-bit | 2 x 24-bit (different gain/mux config) |
| CPU / Clock | 16-bit RISC, 16.384 MHz | 16-bit RISC, 16.384 MHz | 16-bit RISC, 16.384 MHz | 16-bit RISC, 16.384 MHz | 16-bit RISC, 16.384 MHz |
| Flash Memory | 32KB | 32KB | 32KB | 32KB | 32KB |
| RAM | 2KB | 2KB | 2KB | 2KB | 2KB |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| Typical Use Case | Single-phase / split-phase metering AFE | Metering variant, alternate ADC config | Poly-phase / 3-phase metering | Cost-optimized 2-channel metering | Simple V+I monitoring |
Diferenciadores clave
- Three simultaneous 24-bit sigma-delta ADCs on-chip (frente a MSP430I2020TPWR)
- Balanced memory configuration for metering DSP (frente a MSP430I2021TPWR)
- Cost-optimized channel count vs poly-phase variant (frente a MSP430I2041TPWR)
Notas de diseño
The three sigma-delta ADCs are the heart of this metering AFE, so protect their analog inputs: route shunt/CT sense lines as differential pairs with an RC anti-alias filter ahead of each SD24 input, and keep them away from the DCO/clock traces and any external switching regulator. The sigma-delta oversampling inherently rejects moderate in-band noise, but layout-induced crosstalk between current channels degrades phase accuracy, which directly errors power-factor measurement. Place a solid ground plane under the analog section per the datasheet layout guidance.
Decouple DVCC with a 100 nF ceramic capacitor at each supply pin plus a bulk 10 uF capacitor, placed within a few millimeters of the TSSOP-28 power pins. The DCO-based clock system means no external crystal is mandatory, but metering designs typically add a watch crystal for RTC/tariff timing - budget its startup time before entering low-power modes. Verify that the [supply voltage] operating range per the datasheet matches your rail; use the PMM settings recommended in the family user guide rather than custom core-voltage tweaks.
Two frequent mistakes with the MSP430i20xx family: first, firmware ported between i202x/i203x/i204x variants silently fails because the SD24 channel count and gain/mux registers differ - always gate ADC initialization code on the device variant. Second, the 2KB RAM is small: multi-channel 24-bit sample buffering plus DSP working arrays can overflow the stack into heap; plan buffer sizes at design time and test with worst-case simultaneous three-channel sampling at your chosen SD24 oversampling rate.
Información de cumplimiento
RoHS compliant / lead-free per TI standard MSP430i20xx classification reflected on DigiKey and TI.com listings. REACH, halogen-free and conflict minerals status should be confirmed via the official TI certificate of conformance.
