This document is the user manual for ATT7022B, owned by Hitrendtech. It describes the features and characteristics of the product, including high-precision measurement, support for multiple measurement standards, and various power and voltage/current parameters.
This manual describes the high‑precision three‑phase measurement capabilities of the ATT7022B chip, including its sigma‑delta ADC, reference circuitry and power‑factor measurement functions. It also explains the chip’s internal architecture, calibration methods and SPI communication interface.
The document contains detailed electrical characteristics, pin assignments, package information (44‑pin QFP) and typical application parameters such as voltage ranges, temperature limits and ADC performance. This manual is written in Chinese.
| Supply voltage VCC | 4.75 V – 5.25 V |
|---|---|
| Reference voltage | 2.3 V – 2.6 V |
| ADC resolution | 16 bit |
| Package type | 44‑Pin QFP (10 mm × 10 mm) |
The chip operates with VCC between 4.75 V and 5.25 V.
The integrated ADC has a resolution of 16 bits.