Texas Instruments MSP430AFE223IPW

Overview

MSP430AFE223IPW from Texas Instruments is an ultra-low-power mixed-signal microcontroller integrating three independent 24-bit sigma-delta ADCs, a 16-bit RISC CPU, 16-bit Timer_A with three capture/compare registers, USART (UART/SPI), hardware multiplier, and brownout detector. It operates from 1.8 V to 3.6 V, draws 220 µA at 1 MHz/2.2 V in active mode, and supports single-phase electricity metering with differential PGA inputs and programmable reference buffering.

For engineers reviewing the MSP430AFE223IPW datasheet, MSP430AFE223IPW pinout, MSP430AFE223IPW application, or MSP430AFE223IPW equivalent, key selection criteria include its 24-pin TSSOP package, 4 KB flash / 256 B RAM configuration, triple SD24_A ADC support with external reference input capability, and ultra-low-power LPM4 current of 0.1 µA at 2.2 V - critical for battery-backed metrology designs.

Technical Context

The MSP430AFE223IPW implements a 16-bit RISC architecture with digitally controlled oscillator (DCO) enabling sub-1 µs wake-up from standby mode. Its clock system supports internal VLO (12 kHz), calibrated DCO up to 12 MHz, and external HF crystal up to 16 MHz - all selectable via software-controlled basic clock module.

Three independent SD24_A sigma-delta ADCs provide 24-bit resolution with differential PGA inputs, programmable gain, and built-in voltage reference (1.2 V). Each ADC channel outputs bit-stream data via dedicated pins (SD0DO, SD1DO, SD2DO), supporting simultaneous high-precision analog acquisition for multi-channel energy measurement.

Key Specifications

Pinout & Package

The MSP430AFE223IPW is housed in a 24-pin TSSOP (PW) package measuring 7.8 mm × 4.4 mm, optimized for compact meter PCB layouts with thermal resistance R_θJA = 76.4 °C/W under still-air conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430AFE223IPW, the MSP430AFE233IPW provides double the flash and RAM for advanced communication protocols, while the MSP430AFE222IPW reduces analog channel count to lower BOM cost - both retain identical 24-pin TSSOP packaging and ultra-low-power performance.

Availability

MSP430AFE223IPW is available at Aetrix Electronics and suitable for single-phase electricity metering, digital power monitoring, and sensor signal conditioning requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430AFE223IPW 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 specializing in analog and embedded processing technologies, with leadership in low-power microcontrollers and precision analog signal chains.

The MSP430AFE2xx product line is designed specifically for high-accuracy metrology applications, integrating sigma-delta ADCs, programmable gain amplifiers, and ultra-low-power operation to meet IEC 62053 standards for electricity meters.

FAQ

What is the maximum system clock frequency supported by the MSP430AFE223IPW?

The MSP430AFE223IPW supports a maximum system clock (MCLK) frequency of 12 MHz when VCC ≥ 3.3 V and duty cycle is 50% ±10%. At 1.8 V, the maximum frequency is 4.15 MHz. This is achieved using the internal digitally controlled oscillator (DCO) or external HF crystal up to 16 MHz, with appropriate divider configuration to ensure CPU operation within specification. The MSP430AFE223IPW uses this clock for real-time metrology calculations and UART communication timing.

Does the MSP430AFE223IPW support external reference voltage for its ADCs?

Yes, the MSP430AFE223IPW supports external reference voltage via the VREF pin (Pin 7), which accepts 2.5 V inputs for enhanced ADC accuracy. It also provides an internal 1.2 V bandgap reference that can be buffered and output on VREF. When using external reference, the SD24_A module operates within 2.5 V to 3.6 V supply range, ensuring stable 24-bit conversion performance across temperature for metering-grade applications. This capability is integral to the MSP430AFE223IPW's role in precision energy measurement.

How many analog input channels does the MSP430AFE223IPW support?

The MSP430AFE223IPW supports three independent 24-bit sigma-delta ADC channels (SD24_A), each with differential PGA inputs: A0.0±, A1.0±, and A2.0±. These correspond to dedicated analog input pairs on Pins 1–2, 3–4, and 8–9 respectively. All three channels operate simultaneously, enabling true concurrent sampling for voltage, current, and auxiliary signals in electricity meter designs. This triple-channel capability is a defining feature of the MSP430AFE223IPW within the AFE2xx family.

What power-saving modes are available on the MSP430AFE223IPW?

The MSP430AFE223IPW offers five low-power modes: LPM0 through LPM4. LPM4 achieves 0.1 µA current at 2.2 V with full RAM retention and SVS enabled, making it ideal for battery-backed metering applications. Wake-up from LPM4 to active mode takes less than 1 µs via interrupt or RTC alarm. LPM3 disables DCO but retains VLO (12 kHz) for real-time clock operation. These modes are controlled via CPUOFF, SCGx, and OSCOFF bits and are central to the MSP430AFE223IPW's ultra-low-power design philosophy.

Is the MSP430AFE223IPW pin-compatible with other devices in the MSP430AFE2xx family?

Yes, the MSP430AFE223IPW is pin-compatible with all 24-pin TSSOP variants in the MSP430AFE2xx family, including MSP430AFE221IPW, MSP430AFE222IPW, MSP430AFE233IPW, and MSP430AFE253IPW. They share identical pin functions for power (AVCC/AVSS/DVCC/DVSS), reset/debug (RST/NMI/SBWTDIO), crystal (XT2IN/XT2OUT), and core peripherals. Differences lie only in flash/RAM size and number of integrated SD24_A ADCs - allowing hardware reuse across meter tiers while scaling firmware capability. This compatibility is confirmed in TI's SLAS701B datasheet section 4.1.