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類比電流感測放大器

INA223

現行

26V、可編程增益電流感應放大器和類比功率監控器

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產品規格表

INA223

現行
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產品詳細資料

Product type Analog output Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 100, 150, 300 Input offset drift (±) (typ) (µV/°C) 0.6 Features I2C, Programmable Gain Rating Catalog Voltage gain (V/V) 20, 128, 300 CMRR (min) (dB) 100 Bandwidth (kHz) 10, 20, 25 Iq (max) (mA) 0.25 Number of channels 1 Comparators (#) 0 Gain error (%) 0.25, 0.5, 1 Gain error drift (±) (max) (ppm/°C) 50 Slew rate (V/µs) 0.25 Operating temperature range (°C) -40 to 105
Product type Analog output Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 100, 150, 300 Input offset drift (±) (typ) (µV/°C) 0.6 Features I2C, Programmable Gain Rating Catalog Voltage gain (V/V) 20, 128, 300 CMRR (min) (dB) 100 Bandwidth (kHz) 10, 20, 25 Iq (max) (mA) 0.25 Number of channels 1 Comparators (#) 0 Gain error (%) 0.25, 0.5, 1 Gain error drift (±) (max) (ppm/°C) 50 Slew rate (V/µs) 0.25 Operating temperature range (°C) -40 to 105
WSON (DSK) 10 6.25 mm² (2.5 mm × 2.5 mm)
  • Wide Common-Mode Range: 0 V to 26 V
  • ±100 µV Offset (Max, Gain = 300 V/V)
  • Accuracy
    • ±0.25% Shunt Voltage Gain Error (Max)
    • ±0.15% Bus Voltage Gain Error (Max)
    • 1.25% Power Error (Max)
    • 0.3 µV/°C Offset Drift (Max)
    • 50 ppm/°C Gain Drift (Max)
  • Programmable Gains
    • Current Shunt Voltage Gains: 20, 128, 300
    • Bus Voltage Attenuations: 1/10, 1/5, 2/5
  • Monitors/Measures/Reports:
    • Instantaneous Power
    • Bus Voltage
    • Load Current
  • Quiescent Current: 250 µA (Max)
  • Shutdown Current: 1 µA (Max)
  • Wide Common-Mode Range: 0 V to 26 V
  • ±100 µV Offset (Max, Gain = 300 V/V)
  • Accuracy
    • ±0.25% Shunt Voltage Gain Error (Max)
    • ±0.15% Bus Voltage Gain Error (Max)
    • 1.25% Power Error (Max)
    • 0.3 µV/°C Offset Drift (Max)
    • 50 ppm/°C Gain Drift (Max)
  • Programmable Gains
    • Current Shunt Voltage Gains: 20, 128, 300
    • Bus Voltage Attenuations: 1/10, 1/5, 2/5
  • Monitors/Measures/Reports:
    • Instantaneous Power
    • Bus Voltage
    • Load Current
  • Quiescent Current: 250 µA (Max)
  • Shutdown Current: 1 µA (Max)

The INA223 is a voltage-output device that monitors the current, bus voltage, and power of a supply line by sensing a voltage drop across a shunt at common-mode voltages from 0 V to 26 V. The common-mode voltage range is independent of the supply voltage. The low offset of the Zerø-Drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV, full-scale.

The INA223 includes a two-wire interface used for adjusting the configuration settings of the device. The interface is used to control the signal (current shunt voltage, bus voltage, or power) that is directed to the device output. Multiple gain and attenuation settings can be programmed through the two-wire interface to allow for application-specific configurations. The programmable gain feature also allows the device to be operated over a much wider dynamic current load range without having to switch the sensing element used.

A shutdown feature is available to disable the device and effectively disconnect it from the shunt resistor and supply voltage, thus reducing the drain on the battery.

The INA223 operates from a single +2.7-V to +5.5-V supply, drawing a maximum supply current of 250 µA. It is specified over the extended temperature range of –40°C to +105°C, and is offered in an SON-10 package.

The INA223 is a voltage-output device that monitors the current, bus voltage, and power of a supply line by sensing a voltage drop across a shunt at common-mode voltages from 0 V to 26 V. The common-mode voltage range is independent of the supply voltage. The low offset of the Zerø-Drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV, full-scale.

The INA223 includes a two-wire interface used for adjusting the configuration settings of the device. The interface is used to control the signal (current shunt voltage, bus voltage, or power) that is directed to the device output. Multiple gain and attenuation settings can be programmed through the two-wire interface to allow for application-specific configurations. The programmable gain feature also allows the device to be operated over a much wider dynamic current load range without having to switch the sensing element used.

A shutdown feature is available to disable the device and effectively disconnect it from the shunt resistor and supply voltage, thus reducing the drain on the battery.

The INA223 operates from a single +2.7-V to +5.5-V supply, drawing a maximum supply current of 250 µA. It is specified over the extended temperature range of –40°C to +105°C, and is offered in an SON-10 package.
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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 Analog Output Current Shunt and Voltage Instantaneous Power Monitor datasheet 2012/6/13
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
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

INA223EVM — INA223 評估模組

The INA223EVM is a platform for evaluating the performance of the INA223 under various signal, shunt, and supply conditions.

使用指南: PDF
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開發模組 (EVM) 的 GUI

SBOC428 — INA223EVM Software

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模擬型號

INA223 TINA-TI Reference Design

SBOM771.TSC (2176 KB) - TINA-TI 參考設計
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模擬型號

INA223 TINA-TI Spice Model

SBOM772.ZIP (32 KB) - TINA-TI Spice 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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參考設計

TIDA-00302 — 具瞬態穩定性的電流分流監控器參考設計

此高壓側電流分流監控器可用於測量電流通過电流感测電阻器時在电阻器上所形成的電壓。

此外，實作外部保護電路以提供突波和快速暫態保護，並針對 IEC61000-4-4 和 IEC61000-4-5 展示不同的抗擾度等級。

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