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電流感測放大器
數位電源監測器

INA3221-Q1

現行

具有警報功能的 AEC-Q100、26V、三通道、13 位元、i2c 輸出電流/電壓監控器

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產品規格表

INA3221-Q1

現行
產品規格表 立即訂購

產品詳細資料

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 0 V to 26 V
  • Reports shunt and bus voltage
  • High accuracy:
    • Offset voltage: ±80 µV (maximum)
    • Gain error: 0.25% (maximum)
  • Configurable averaging options
  • Four programmable addresses
  • Programmable alert and warning outputs
  • Power-supply operation: 2.7 V to 5.5 V
  • 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 0 V to 26 V
  • Reports shunt and bus voltage
  • High accuracy:
    • Offset voltage: ±80 µV (maximum)
    • Gain error: 0.25% (maximum)
  • Configurable averaging options
  • Four programmable addresses
  • Programmable alert and warning outputs
  • Power-supply operation: 2.7 V to 5.5 V

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 0 V to 26 V. The device is powered from a single 2.7-V to 5.5-V supply, and draws 350 µA (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 0 V to 26 V. The device is powered from a single 2.7-V to 5.5-V supply, and draws 350 µA (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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 INA3221-Q1AEC-Q100, 26-V, Triple Channel, 13-Bit, I2C Output Current and Voltage Monitor With Alerts datasheet (Rev. C) PDF | HTML 2021/3/23
應用說明 Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 2026/4/27
應用說明 Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024/11/18
應用說明 Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML 2021/9/30
應用說明 Getting Started with Digital Power Monitors (Rev. A) PDF | HTML 2021/9/2
功能安全資訊 INA3221-Q1 Functional Safety FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2020/5/20
Application brief Energy and Power Monitoring with Digital Current Sensors 2017/5/25
應用說明 Understanding the I2C Bus PDF | HTML 2015/6/30

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

INA3221EVM — INA3221 評估模組

The INA3221EVM is a platform for evaluating the performance of the INA3221 under various signal, shunt, and supply conditions.

使用指南: PDF
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程式碼範例或展示

SBOC424 — INA3221EVM Source Code

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驅動程式或資料庫

INA3221SW-LINUX — 適用於 INA3221 的 Linux 驅動程式

The Linux driver supports the INA3221 Triple Current/Power Monitor. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • ina3221
(...)
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開發模組 (EVM) 的 GUI

SBOC425 — INA3221EVM User Software

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模擬型號

INA3221 IBIS Model

SBOM761.ZIP (56 KB) - IBIS 模型
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計算工具

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

類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。

除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。

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計算工具

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

此 Excel 計算機提供兩個與五個標準電流感測放大器的比較，並提供包含各裝置基本參數的圖表。此計算機也會採用使用者的系統條件輸入，例如共模電壓、供應電壓、分流電阻器值與公差，然後在可調整電流範圍中繪製錯誤曲線。此外，計算機會根據計算的全刻度輸入電壓除以最大量測電流，輸出最大分流值 (mΩ)。
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計算工具

SBOR021 — Power Monitor Tool

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VQFN (RGV) 16 Ultra Librarian
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