INA231

現行

具警示功能並採用 wcsp 的 28V、16 位元、i2c 輸出電流/電壓/電源監測器

產品詳細資料

Common-mode voltage (max) (V) 28 Common-mode voltage (min) (V) 0 Digital interface I2C, SMBus Resolution (Bits) 16 Input offset (±) (max) (µV) 50 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.42 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Intergrated 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 Digital interface I2C, SMBus Resolution (Bits) 16 Input offset (±) (max) (µV) 50 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.42 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Intergrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 1 Rating Catalog Operating temperature range (°C) -40 to 125
DSBGA (YFD) 12 2.28326 mm² 1.645 x 1.388 DSBGA (YFF) 12 2.52000000000000018 mm² 1.4000000000000001 x 1.8
  • Bus voltage sensing from 0 V to 28 V
  • High- or low-side sensing
  • Current, voltage, and power reporting
  • High accuracy:
    • Gain error: 0.5% (maximum)
    • Offset: 50 µV (maximum)
  • Configurable averaging options
  • Programmable alert threshold
  • 1.8-V I2C compliant
  • Power-supply operation: 2.7 V to 5.5 V
  • Start-up mode options:
    • INA231A: active conversion
    • INA231B: low-current power down
  • Bus voltage sensing from 0 V to 28 V
  • High- or low-side sensing
  • Current, voltage, and power reporting
  • High accuracy:
    • Gain error: 0.5% (maximum)
    • Offset: 50 µV (maximum)
  • Configurable averaging options
  • Programmable alert threshold
  • 1.8-V I2C compliant
  • Power-supply operation: 2.7 V to 5.5 V
  • Start-up mode options:
    • INA231A: active conversion
    • INA231B: low-current power down

The INA231 is a current-shunt and power monitor with a 1.8-V compliant I2C interface that features 16 programmable addresses. The INA231 monitors both shunt voltage drops and bus supply voltage, providing increased protection by asserting the ALERT pin if the values are outside the programmed range. Programmable calibration value, conversion time, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts, thus reducing host processing.

The INA231 senses current on bus voltages that vary from 0 V to 28 V, with the device powered from a single 2.7-V to 5.5-V supply, drawing 330 µA (typical) of supply current. The INA231 is specified over the operating temperature range of –40°C to +125°C.

The INA231 is available in two versions: the INA231A starts up performing continuous conversions of the shunt and bus voltage, whereas the INA231B starts up in low-current, power-down mode.

The INA231 is a current-shunt and power monitor with a 1.8-V compliant I2C interface that features 16 programmable addresses. The INA231 monitors both shunt voltage drops and bus supply voltage, providing increased protection by asserting the ALERT pin if the values are outside the programmed range. Programmable calibration value, conversion time, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts, thus reducing host processing.

The INA231 senses current on bus voltages that vary from 0 V to 28 V, with the device powered from a single 2.7-V to 5.5-V supply, drawing 330 µA (typical) of supply current. The INA231 is specified over the operating temperature range of –40°C to +125°C.

The INA231 is available in two versions: the INA231A starts up performing continuous conversions of the shunt and bus voltage, whereas the INA231B starts up in low-current, power-down mode.

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技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet INA231 28-V, 16-Bit, I2C Output Current, Voltage and Power Monitor With Alert in WCSP Package datasheet (Rev. D) PDF | HTML 2022年 7月 13日
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 2024年 11月 18日
E-book An Engineer's Guide to Current Sensing (Rev. B) 2022年 4月 12日
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 2022年 1月 25日
Application note Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML 2021年 9月 30日
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 2021年 9月 29日
Application brief Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) PDF | HTML 2021年 9月 28日
Selection guide Current Sense Amplifiers (Rev. E) 2021年 9月 20日
Application note Getting Started with Digital Power Monitors (Rev. A) PDF | HTML 2021年 9月 2日
Application brief Precision, Low-Side Current Measurement (Rev. B) 2019年 3月 6日
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 2019年 2月 19日
Design guide –48-V Telecom Current, Voltage, and Power Sense With Isolation Reference Design (Rev. A) 2017年 9月 28日
Application brief Energy and Power Monitoring with Digital Current Sensors 2017年 5月 25日
Application note Understanding the I2C Bus PDF | HTML 2015年 6月 30日

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

INA231EVM — INA231 評估模組

INA231 評估模組 (EVM) 是一款易於使用的平台,可評估 INA231 裝置的主要功能與性能。

EVM 支援高達 10-A 的電流量測,並隨附圖形使用者介面 (GUI) 支援,可讀取及寫入裝置暫存器。

使用指南: PDF | HTML
TI.com 無法提供
開發模組 (EVM) 的 GUI

SBOC434 INA231EVM Rev A Software

INA231EVM Rev A Software
支援產品和硬體

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模擬型號

INA231 IBIS Model

SBOM805.ZIP (45 KB) - IBIS Model
計算工具

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

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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計算工具

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

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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支援產品和硬體

計算工具

SBOR021 Power Monitor Tool

Power Monitor Tool
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一,涵蓋我們的類比和電源產品組合,以及特定類比行為模型,且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前,建立完整的終端設備設計和解決方案原型,進而縮短上市時間並降低開發成本。 

在 PSpice for TI 設計與模擬工具中,您可以搜尋 TI (...)
模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
使用指南: PDF
參考設計

TIDA-010269 — 手持式超音波成像裝置電源供應參考設計

此參考設計專為強化採用新一代發射器與接收器的新一代 128 通道超音波智慧探測器而打造。尺寸精巧 (80mm × 45mm × 20mm),包含所有 128 通道智慧探測器的電源功能,且效率高於 80%。這款無變壓器高電壓電源供應器(25mA 時為 ±75V)是全新升壓穩壓器,可讓參考設計符合大多數智慧探測器應用。
Design guide: PDF
參考設計

TIDA-010057 — 超音波智慧探測器電源供應參考設計

醫學影像的顯著技術進步與高度整合,特別是手持式超音波智慧探測器,推進工程師開發出體積小巧且高效率、抗雜訊抗擾的電源解決方案。此參考設計記錄了我們具有 TX7332 傳送晶片和 AFE5832LP 接收晶片的高性能 128 通道 Tx/64 通道 Rx 超音波智慧探測器解決方案的端對端電源和資料解決方案。電源樹狀結構包括用於傳送的單級無變壓器 HV 產生(高達 +/- 80 V 且高度 <5 mm),以及來自 5V USB Type-C™ 輸入的 AFE 和 FPGA 負載點 LV。此設計可實現低雜訊(<10mV 漣波)高效電源軌,以及更出色的熱性能(溫度上升 < 10°C),實現系統效率提升 ~80%,接收資料 SNR >55dB,以及超精巧尺寸 (90mm x 45mm x 20mm)。所有電源軌皆可使用我們的整合式緩衝分壓器 CDCE949 與外部時脈同步。此設計也支援 1S 電池輸入,正常超音波運作可長達 2 小時。
Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
DSBGA (YFD) 12 Ultra Librarian
DSBGA (YFF) 12 Ultra Librarian

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  • 進行中的可靠性監測
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  • 組裝地點

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