The Teridian 71M6531D/F and 71M6532D/F are highly integrated SOCs with an MPU core, RTC, FLASH and LCD driver. They support a wide range of residential metering applications with very few low-cost external components. They support 2-wire and 3-wire single-phase and dual-phase residential metering along with tamper-detection mechanisms.
The Teridian 71M6531D/F and 71M6532D/F are highly integrated system‑on‑chip devices for residential energy metering. They combine an MPU core, RTC, flash, LCD driver, and a 22‑bit delta‑sigma ADC with up to four sensor inputs, supporting single‑phase and dual‑phase metering, tamper detection, and various battery‑powered modes.
The datasheet provides a complete hardware description, analog front‑end details, MPU core information, on‑chip resources, electrical specifications, ordering data, and reference designs. It also includes pin‑out diagrams for the 68‑pin QFN (71M6531) and 100‑pin LQFP (71M6532) packages, along with timing and performance tables.
| Wh accuracy | < 0.1% over 2000:1 current range |
|---|---|
| Typical power consumption | 39 mW @ 3.3 V |
| ADC resolution | 22‑bit delta‑sigma |
| Number of UARTs | Two |
Both devices use a 22‑bit delta‑sigma ADC.
The IC includes two UARTs for IR and AMR communication.
Typical consumption is 39 mW when operating at 3.3 V.