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ZHCS078B June 2011 – September 2024 INA226

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机械数据 (封装 | 引脚)

DGS|10
- MPDS035C

散热焊盘机械数据 (封装 | 引脚)

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7.1 Register Maps

The INA226 uses a bank of registers for holding configuration settings, measurement results, minimum/maximum limits, and status information. Table 7-1 summarizes the device registers; refer to the Functional Block Diagram section for an illustration of the registers.

All 16-bit device registers are two 8-bit bytes via the I²C interface.

Table 7-1 Register Set Summary

POINTER ADDRESS	REGISTER NAME	FUNCTION	POWER-ON RESET		TYPE⁽¹⁾
HEX	REGISTER NAME	FUNCTION	BINARY	HEX	TYPE⁽¹⁾
00h	Configuration Register	All-register reset, shunt voltage and bus voltage ADC conversion times and averaging, operating mode.	01000001 00100111	4127	R/ W
01h	Shunt Voltage Register	Shunt voltage measurement data.	00000000 00000000	0000	R
02h	Bus Voltage Register	Bus voltage measurement data.	00000000 00000000	0000	R
03h	Power Register⁽²⁾	Contains the value of the calculated power being delivered to the load.	00000000 00000000	0000	R
04h	Current Register⁽²⁾	Contains the value of the calculated current flowing through the shunt resistor.	00000000 00000000	0000	R
05h	Calibration Register	Sets full-scale range and LSB of current and power measurements. Overall system calibration.	00000000 00000000	0000	R/ W
06h	Mask/Enable Register	Alert configuration and Conversion Ready flag.	00000000 00000000	0000	R/ W
07h	Alert Limit Register	Contains the limit value to compare to the selected Alert function.	00000000 00000000	0000	R/ W
FEh	Manufacturer ID Register	Contains unique manufacturer identification number.	0101010001001001	5449	R
FFh	Die ID Register	Contains unique die identification number.	0010001001100000	2260	R

(1) Type: R = Read-Only, R/ W = Read/Write.

(2) The Current Register (04h) and Power Register (03h) default to '0' because the Calibration register defaults to '0', yielding zero current and power values until the Calibration register is programmed.