User manual for the ATT7051A/53A measurement chip with SPI interface and multi‑function features.
The ATT7051A/53A is a single‑phase measurement chip with SPI interface, designed for power metering and monitoring. It operates from 3.0 V to 3.6 V and includes three 19‑bit sigma‑delta ADCs, a 5.5296 MHz crystal, and supports a 2000:1 dynamic range.
The manual provides a block diagram, pin definitions for both 24‑pin and 28‑pin packages, application modes, detailed module descriptions, register maps, and wiring diagrams. It also covers power‑down features, interrupt handling, and calibration procedures. This manual is written in Chinese.
| Operating voltage range | 3.0 V – 3.6 V |
|---|---|
| Crystal frequency | 5.5296 MHz |
| ADC channels | Three 19‑bit sigma‑delta ADCs |
| Sampling rates | 28 kHz / 14 kHz / 7 kHz (adjustable) |
| Normal mode current consumption | < 4.5 mA |
| Low‑power mode current consumption | < 2 mA |
| SPI maximum speed | 1 Mbps |
The chip works from 3.0 V to 3.6 V.
It uses a 5.5296 MHz crystal.
The device contains three 19‑bit sigma‑delta ADC channels.
SPI can operate up to 1 Mbps.