Texas Instruments MSP430AFE223IPWR

Overview

MSP430AFE223IPWR 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 MSP430AFE223IPWR datasheet, MSP430AFE223IPWR pinout, MSP430AFE223IPWR application, or MSP430AFE223IPWR equivalent, key selection criteria include its 24-pin TSSOP package, 4 KB flash / 256 B RAM configuration, triple SD24_A ADC architecture, low-power timing performance (sub-1 µs wake-up), and metrology-grade analog front-end integration for precision energy measurement systems.

Technical Context

The MSP430AFE223IPWR implements a 16-bit RISC CPU with constant generators and digitally controlled oscillator (DCO), enabling sub-1 µs wake-up from LPM3/LPM4. Its clock system supports HF crystal (up to 16 MHz), internal VLO (12 kHz), and DCO calibration at two frequencies - all configurable via software-controlled basic clock module.

Three independent SD24_A sigma-delta ADCs provide 24-bit resolution with differential PGA inputs, external reference support (VREF pin), built-in voltage reference, and bit-stream outputs (SDCLK, SD0DO–SD2DO) routed to dedicated I/O pins - each ADC channel mapped to specific P1.x pins per device variant.

Key Specifications

Pinout & Package

Package: 24-pin TSSOP (PW), body size 7.8 mm × 4.4 mm, thermal resistance R_θJA = 76.4 °C/W (still air).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430AFE223IPWR, MSP430AFE233IPW offers higher memory headroom for feature-rich metering firmware, while MSP430AFE222IPW reduces analog channel count to lower BOM cost - both share identical 24-pin TSSOP packaging and core peripherals including Timer_A3, USART0, and hardware multiplier.

Availability

MSP430AFE223IPWR is available at Aetrix Electronics and suitable for single-phase electricity metering, digital power monitoring, and sensor signal conditioning requiring stable component supply across industrial production cycles.

Supply support for MSP430AFE223IPWR 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, embedded processing, and connectivity technologies with over 90 years of innovation in power management and precision analog design.

The MSP430AFE2xx product line is engineered specifically for metrology and precision sensing applications, integrating high-resolution sigma-delta ADCs, ultra-low-power operation, and robust analog front-end features to meet IEC/ANSI energy measurement standards.

FAQ

What is the maximum system clock frequency supported by the MSP430AFE223IPWR?

The MSP430AFE223IPWR supports a maximum MCLK frequency of 12 MHz when VCC ≥ 3.3 V and duty cycle is 50% ±10%. At 2.7 V, the maximum is 9 MHz; at 1.8 V, it is 4.15 MHz. These limits are defined by the DCO and internal timing constraints - exceeding them may cause incorrect CPU or peripheral operation. The MSP430AFE223IPWR datasheet specifies these values in Section 5.3 (Recommended Operating Conditions).

How many analog input channels does the MSP430AFE223IPWR support?

The MSP430AFE223IPWR supports three independent 24-bit sigma-delta ADC channels (SD24_A), each with differential PGA inputs: A0.0±, A1.0±, and A2.0±. This matches the "x3" suffix in its part number family designation. All three channels are fully functional and accessible on the 24-pin TSSOP package - confirmed in the device comparison table and pin diagrams in the MSP430AFE223IPWR datasheet.

Does the MSP430AFE223IPWR include an internal voltage reference?

Yes, the MSP430AFE223IPWR includes an internal 1.2 V bandgap voltage reference usable by the SD24_A ADCs. It can be enabled via register control and output on the VREF pin when configured as a source. The VREF pin also accepts external references (2.5 V typical), providing flexibility for metrology-grade accuracy. This functionality is documented in Sections 5.29 and 5.30 of the MSP430AFE223IPWR datasheet.

What communication interfaces are available on the MSP430AFE223IPWR?

The MSP430AFE223IPWR integrates one USART0 module supporting asynchronous UART and synchronous SPI modes - selected dynamically in software. Pins P1.3–P1.7 and P2.0 provide full UART (UTXD0/URXD0) and SPI (SIMO0/SOMI0/UCLK0/STE0) functionality. No I²C or CAN interface is present. This dual-mode serial capability is explicitly stated in Section 1.1 Features and Table 4-1 of the MSP430AFE223IPWR datasheet.

What is the standby current consumption of the MSP430AFE223IPWR?

The MSP430AFE223IPWR consumes 0.5 µA in Standby Mode (LPM3) and 0.1 µA in Off Mode with RAM retention (LPM4), both measured at 2.2 V and 25°C. These values are specified in Section 1.1 Features and Table 5.7 of the MSP430AFE223IPWR datasheet. LPM4 current rises to 1.1 µA at 85°C - a critical consideration for sealed meter enclosures operating in high-temperature environments.