产品详情

Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) 0 Digital interface I2C, SMBus Resolution (Bits) 13 Input offset (±) (max) (µV) 80 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 110 Iq (max) (mA) 0.35 Gain error (%) 0.25 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Low-side Capable Number of channels 3 Power measurement accuracy (%) 0.5 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) 0 Digital interface I2C, SMBus Resolution (Bits) 13 Input offset (±) (max) (µV) 80 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 110 Iq (max) (mA) 0.35 Gain error (%) 0.25 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Low-side Capable Number of channels 3 Power measurement accuracy (%) 0.5 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 125
VQFN (RGV) 16 16 mm² (4 mm × 4 mm)
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C
  • Functional Safety-Capable
  • Senses bus voltages from 0V to 26V
  • Reports shunt and bus voltage
  • High accuracy:
    • Offset voltage: ±80µV (maximum)
    • Gain error: 0.25% (maximum)
  • Configurable averaging options
  • Four programmable addresses
  • Programmable alert and warning outputs
  • Power-supply operation: 2.7V to 5.5V
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C
  • Functional Safety-Capable
  • Senses bus voltages from 0V to 26V
  • Reports shunt and bus voltage
  • High accuracy:
    • Offset voltage: ±80µV (maximum)
    • Gain error: 0.25% (maximum)
  • Configurable averaging options
  • Four programmable addresses
  • Programmable alert and warning outputs
  • Power-supply operation: 2.7V to 5.5V

The INA3221-Q1 is a three-channel, high-side current and bus voltage monitor with an I2C- and SMBUS-compatible interface. The INA3221-Q1 monitors both shunt voltage drops and bus supply voltages, in addition to having programmable conversion times and averaging modes for these signals. The INA3221-Q1 offers both critical and warning alerts to detect multiple programmable out-of-range conditions for each channel.

The INA3221-Q1 senses current on buses that can vary from 0V to 26V. The device is powered from a single 2.7V to 5.5V supply, and draws 350µA (typ) of supply current. The INA3221-Q1 is specified over the operating temperature range of –40°C to +125°C. The I2C- and SMBUS-compatible interface features four programmable addresses.

The INA3221-Q1 is a three-channel, high-side current and bus voltage monitor with an I2C- and SMBUS-compatible interface. The INA3221-Q1 monitors both shunt voltage drops and bus supply voltages, in addition to having programmable conversion times and averaging modes for these signals. The INA3221-Q1 offers both critical and warning alerts to detect multiple programmable out-of-range conditions for each channel.

The INA3221-Q1 senses current on buses that can vary from 0V to 26V. The device is powered from a single 2.7V to 5.5V supply, and draws 350µA (typ) of supply current. The INA3221-Q1 is specified over the operating temperature range of –40°C to +125°C. The I2C- and SMBUS-compatible interface features four programmable addresses.

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应用手册 将印刷电路板覆铜迹线用作电流检测 分流电阻器 PDF | HTML PDF | HTML 2026-5-6
应用手册 电流检测放大器的 ESD、EOS 和闩锁效应事件的风险和预防 PDF | HTML 英语版 PDF | HTML 2024-12-11
应用手册 数字电源监控器入门 (Rev. A) 英语版 (Rev.A) PDF | HTML 2021-10-20
应用手册 Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML 2021-9-30
功能安全信息 INA3221-Q1 Functional Safety FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2020-5-20
应用简报 使用数字电流传感器进行功耗和能耗监控 英语版 2017-9-14
应用手册 Understanding the I2C Bus PDF | HTML 2015-6-30

设计与开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

评估板

INA3221EVM — INA3221 评估模块

INA3221EVM 是用于评估 INA3221 在各种信号、分流和电源条件下的性能的平台。

用户指南: PDF
支持的产品和硬件
有库存
限制:
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无货
代码示例或演示

SBOC424 — INA3221EVM Source Code

支持的产品和硬件
驱动程序或库

INA3221SW-LINUX — 适用于 INA3221 的 Linux 驱动程序

Linux 驱动程序支持 INA3221 三路电流/功率监测计。Linux 驱动程序支持通过 I2C 总线进行通信,并可与硬件监控子系统交互。

Linux 主线状态

在 Linux 主线中提供:是
可通过 git.ti.com 获取:不适用

支持的器件:
  • ina3221
Linux 源文件

与该器件关联的文件为:

  1. drivers/hwmon/ina3221.c
  2. Documentation/devicetree/bindings/hwmon/ina3221.txt
  3. Documentation/hwmon/ina3221
源文件 drivers/hwmon/ina3221.c
Linux 器件树文档 (...)
支持的产品和硬件
评估模块 (EVM) 用 GUI

SBOC425 — INA3221EVM User Software

支持的产品和硬件
仿真模型

INA3221 IBIS Model

SBOM761.ZIP (56 KB) - IBIS 模型
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计算工具

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面,其中显示各种常见计算列表,从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件,以稳定模数转换器 (ADC) 驱动器缓冲器电路。

除了可用作独立工具之外,该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

支持的产品和硬件
计算工具

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

该 Excel 计算器比较两个和五个标准电流检测放大器,提供包含每个器件基本参数的图表。该计算器还获取用户系统条件输入,例如共模电压、电源电压、分流电阻值和容差,然后绘制可调电流范围内的误差曲线。此外,计算器根据满量程输入电压除以测量电流上限值的计算结果,输出分流上限值 (mΩ)。
支持的产品和硬件
计算工具

SBOR021 — Power Monitor Tool

支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RGV) 16 Ultra Librarian

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如果您对质量、包装或订购 TI 产品有疑问,请参阅 TI 支持。​​​​​​​​​​​​​​

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