The CS7401xx energy measurement system-on-chip (SoC) reduces the cost to implement advanced digital power meters for electrical utilities and enables many other energy conservation applications. It features 24-bit Delta-Sigma ADCs and on-chip metrology code, providing the highest quality power measurement. The 32-bit processor and targeted peripherals can implement metrology, advanced data management standards, and communication protocols all in the same device. The extensive software library enables quick and easy program development.
The CS7401xx family is an energy‑measurement system‑on‑chip that integrates three 24‑bit Delta‑Sigma ADCs, a 32‑bit ARM7TDMI processor, and a range of on‑chip peripherals such as LCD driver, RTC, UARTs, and a switching buck regulator. It is designed for low‑cost, high‑accuracy power metrology in utility meters and other energy‑conservation applications.
The handbook covers hardware description, firmware/API details, pin functions, electrical characteristics, functional operation, package and ordering information, as well as environmental and handling guidelines. Calibration procedures, power‑mode management, and example application circuits are also included.
| On‑chip Flash Memory | 32 kB, 64 kB, or 128 kB |
|---|---|
| On‑chip RAM | 8 kB |
| ADC Type | Three independent 24‑bit Delta‑Sigma ADCs |
| Sampling Rate | 1 kHz‑8 kHz selectable |
| Supply Voltage (VH) | +2.6 V to +3.6 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 64‑lead LQFP |
| Current Consumption (4 MHz) | 5 mA |
| Current Consumption (32 MHz) | 17 mA |
| Low‑Power Mode Current | 25 µA @ 16 kHz |
| UART Ports | Two |
The device includes three independent 24‑bit Delta‑Sigma ADCs.
It offers 32 kB, 64 kB, or 128 kB of on‑chip flash memory.
The chip operates from –40 °C up to +85 °C.
The SoC provides two UART communications ports.