MSP430F6735AIPZR — a 16-bit MCU with integrated sigma-delta ADCs for metrology and sensing
An integrated LCD controller drives up to 196 segments directly, reducing external display driver cost.
Three 24-bit sigma-delta ADCs — what they mean for measurement accuracy
The three 24-bit sigma-delta ADCs are the primary reason to choose this part over a general-purpose MCU. They provide simultaneous sampling on three independent channels, which is essential for polyphase power calculation where voltage and current from each phase must be captured at the same instant. The 24-bit resolution gives a wide dynamic range for current-sense transformers or shunt resistors without external gain stages. The additional 8-channel 10-bit ADC handles auxiliary inputs like temperature or tamper detection. For a calibration technician, this means the reference and converter chain can be verified against a traceable standard; the part's long-term drift and temperature stability are determined by the internal voltage reference, so a design should budget for periodic re-calibration if absolute accuracy is required over the product lifetime.
This means TI continues to manufacture the part, and there is no announced last-time-buy or discontinuation notice.
Package, footprint, and board-level considerations
The device is supplied in a 100-pin LQFP with a 14×14 mm body. The supplier device package is 100-LQFP (14×14). The part is surface-mount only, shipped in Tape & Reel (TR) format.
Peripheral set and connectivity for system integration
The MSP430F6735AIPZR includes a brown-out detect and reset (BOR), power-on reset (POR), DMA controller, watchdog timer (WDT), and multiple timer/PWM channels. The LCD controller supports up to 196 segments, which is enough for a multi-line display with icons. The 72 I/O pins give plenty of headroom for parallel LCD data buses, keypad scanning, and general-purpose control.