首頁 放大器 電流感測放大器 數位電源監測器
首頁
放大器
電流感測放大器
數位電源監測器

INA234

現行

採用 WCSP 且具有警報功能的 28-V、12 位元、I²C 輸出電流/電壓/電源監測器

立即訂購
產品規格表

INA234

現行
產品規格表 立即訂購

產品詳細資料

Common-mode voltage (max) (V) 28 Common-mode voltage (min) (V) -0.3 Digital interface I2C Resolution (Bits) 12 Input offset (±) (max) (µV) 100 Input offset drift (±) (max) (µV/°C) 0.5 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Iq (max) (mA) 0.5 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Integrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 1 Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 28 Common-mode voltage (min) (V) -0.3 Digital interface I2C Resolution (Bits) 12 Input offset (±) (max) (µV) 100 Input offset drift (±) (max) (µV/°C) 0.5 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Iq (max) (mA) 0.5 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Integrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 1 Rating Catalog Operating temperature range (°C) -40 to 125
DSBGA (YBJ) 8 0.2316 mm² (1.2 mm × 0.193 mm)
  • High-side or low-side current sensing
  • Operates from a 1.7V to 5.5V power supply
  • Reports current, voltage and power
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3V to 28V
  • Current monitoring accuracy:
    • 12-bit ADC resolution
    • 0.5% gain error (maximum)
    • 100µV offset (maximum)
  • Low input bias current: 10nA (maximum)
  • Configurable averaging options
  • General call addressing allows conversion synchronization among devices
  • Alert limits for over and under current events
  • 1.2V compliant I2C, SMBus interface
  • Two device address options with a 4-pin selectable address
  • DSBGA-8 Package (0.745mm × 1.508mm)
  • Operating temperature: –40°C and +125°C
  • High-side or low-side current sensing
  • Operates from a 1.7V to 5.5V power supply
  • Reports current, voltage and power
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3V to 28V
  • Current monitoring accuracy:
    • 12-bit ADC resolution
    • 0.5% gain error (maximum)
    • 100µV offset (maximum)
  • Low input bias current: 10nA (maximum)
  • Configurable averaging options
  • General call addressing allows conversion synchronization among devices
  • Alert limits for over and under current events
  • 1.2V compliant I2C, SMBus interface
  • Two device address options with a 4-pin selectable address
  • DSBGA-8 Package (0.745mm × 1.508mm)
  • Operating temperature: –40°C and +125°C

The INA234 device is a 12-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2V, 1.8V, 3.3V, and 5V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.

The INA234 features programmable ADC conversion times and averaging. The device also has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes and power in watts. The device monitors the bus voltage present on the IN– pin and can alert on overcurrent and undercurrent conditions as well as overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA234 senses current on common-mode bus voltages that can vary from –0.3V to 28V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 300µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2µA.

The INA234 device is a 12-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2V, 1.8V, 3.3V, and 5V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.

The INA234 features programmable ADC conversion times and averaging. The device also has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes and power in watts. The device monitors the bus voltage present on the IN– pin and can alert on overcurrent and undercurrent conditions as well as overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA234 senses current on common-mode bus voltages that can vary from –0.3V to 28V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 300µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2µA.
filter 尋找其它 數位電源監測器
下載 觀看有字幕稿的影片 影片

技術文件

找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 10
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 INA234 28V , 12-Bit , Current, Voltage, and Power Monitor With an I2 C Interface datasheet (Rev. D) PDF | HTML 2025/8/27
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 Aliasing and Prevention in Some Capacitively Coupled Current Sense Amplifiers PDF | HTML 2025/11/6
應用說明 Closed Loop Constant Power Drive to Simplify Heater Element Control and Extend Battery Life PDF | HTML 2025/1/29
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
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 2021/9/29
Application brief Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) PDF | HTML 2021/9/28
應用說明 Getting Started with Digital Power Monitors (Rev. A) PDF | HTML 2021/9/2
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

INA234_236EVM — 適用電流/電壓/電源監控器的 INA232、INA234 和 INA236 評估模組

此評估模組 (EVM) 是一款易於使用的平台，可評估 INA232、INA234 或 INA236 的主要功能與性能。EVM 隨附 GUI 支援，可讀取及寫入至裝置暫存器。
使用指南: PDF | HTML
支援產品和硬體
IDE、配置、編譯器或偵錯程式

ASC-STUDIO-INA234 — ASC Studio (SysConfig) for configuring all aspects of the INA234 digital power monitor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA234 digital power monitor.
支援產品和硬體
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。

支援產品和硬體
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)。
支援產品和硬體
計算工具

SBOR021 — Power Monitor Tool

支援產品和硬體
封裝 針腳 CAD 符號、佔位空間與 3D 模型
DSBGA (YBJ) 8 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片系列

觀看所有影片

影片