首頁 放大器 電流感測放大器 具整合式分流電阻器的數位電源監測器
首頁
放大器
電流感測放大器
具整合式分流電阻器的數位電源監測器

INA780B

現行

具 400-µΩ EZShunt™ 技術的 85-V 16 位元 I²C 數位電源監控器

立即訂購
產品規格表

INA780B

現行
產品規格表 立即訂購

產品詳細資料

Common-mode voltage (max) (V) 85 Common-mode voltage (min) (V) -0.1 Continuous current (max) (A) 75 Input offset current (±) (max) (mA) 125 Input offset current drift (±) (typ) (µA/°C) 10 Gain error (%) 0.4 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 1 Digital interface I2C Resolution (Bits) 16 Features Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Monitor, Integrated Shunt, Low-side Capable, Standard precision Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 85 Common-mode voltage (min) (V) -0.1 Continuous current (max) (A) 75 Input offset current (±) (max) (mA) 125 Input offset current drift (±) (typ) (µA/°C) 10 Gain error (%) 0.4 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 1 Digital interface I2C Resolution (Bits) 16 Features Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Monitor, Integrated Shunt, Low-side Capable, Standard precision Rating Catalog Operating temperature range (°C) -40 to 125
VSON (DEK) 15 See data sheet
  • Low loss integrated shunt resistor
    • Internal resistance: 400 µΩ, TA = 25°C
    • Continuous current: ±75 A, TA = 25°C
    • Peak measurement capability: ±78.64 A
  • Current monitoring accuracy: A/B Grade, maximum
    • Offset current: ±12.5 mA / ±125 mA
    • Offset drift: ±50 µA/°C (A and B Grades)
    • System gain error: ±0.75% / ±1.25%
    • Common-mode rejection: ±0.25 / ±2.5 mA/V
  • Power monitoring accuracy: A/B Grade, maximum
    • ±0.9% / ±1.6% at 25°C, full scale
  • Energy and charge accuracy: A/B Grade, maximum
    • ±1.4% / ±2.1% at 25°C, full scale
  • Temperature sensor: ±1.5°C (maximum at 25°C)
  • Precision oscillator: ±0.5% (maximum at 25°C)
  • Programmable conversion time and averaging
  • 2.94-MHz high-speed I2C interface with 16 pin-selectable addresses
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)
  • Low loss integrated shunt resistor
    • Internal resistance: 400 µΩ, TA = 25°C
    • Continuous current: ±75 A, TA = 25°C
    • Peak measurement capability: ±78.64 A
  • Current monitoring accuracy: A/B Grade, maximum
    • Offset current: ±12.5 mA / ±125 mA
    • Offset drift: ±50 µA/°C (A and B Grades)
    • System gain error: ±0.75% / ±1.25%
    • Common-mode rejection: ±0.25 / ±2.5 mA/V
  • Power monitoring accuracy: A/B Grade, maximum
    • ±0.9% / ±1.6% at 25°C, full scale
  • Energy and charge accuracy: A/B Grade, maximum
    • ±1.4% / ±2.1% at 25°C, full scale
  • Temperature sensor: ±1.5°C (maximum at 25°C)
  • Precision oscillator: ±0.5% (maximum at 25°C)
  • Programmable conversion time and averaging
  • 2.94-MHz high-speed I2C interface with 16 pin-selectable addresses
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)

The INA780x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±78.64 A with common-mode voltage support from –0.1 V to +85 V.

The INA780x reports current, bus voltage, die temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.

The low offset and gain drift design of the INA780x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

The INA780x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±78.64 A with common-mode voltage support from –0.1 V to +85 V.

The INA780x reports current, bus voltage, die temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.

The low offset and gain drift design of the INA780x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.
filter 尋找其它 具整合式分流電阻器的數位電源監測器
下載 觀看有字幕稿的影片 影片

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 6
重要文件 類型 標題 格式選項 日期
* Data sheet INA780x 85 V , 16 -Bit, Precision I2C Output Digital Power Monitor with EZShunt Technology datasheet (Rev. A) PDF | HTML 2023年 12月 19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
Application note How EZShunt Technology Simplifies and Reduces Error in Shunt-Based Designs PDF | HTML 2024年 6月 27日
Technical article Bringing design simplicity, low drift, and small size to integrated-shunt solutions PDF | HTML 2024年 1月 4日
Application brief Improving Power Amplifier Efficiency With Current Monitors (Rev. B) PDF | HTML 2023年 7月 24日
Certificate INA780BEVM EU Declaration of Conformity (DoC) 2023年 5月 17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

INA780-INA781EVM — 適用 EZShunt™ 數位電源監控器且具內建分流電阻器的 INA780 和 INA781

INA780 和 IN781 評估模組 (EVM) 是一款精巧的平台，用於評估採用 EZShunt™ 技術的 INA780A、INA780B 或 INA781 高精度數位電源監控器在指定輸入電流、共模電壓和溫度範圍內的主要特性與性能。對性能評估的儀器需求極低，且裝置配備內部分流器，可快速縮短建立原型時間。需要能夠驅動所需輸入電流與共模電壓的輸入來源。

INA780-INA781EVM 電源供應器和透過 GUI 進行的數位輸入與輸出操作，由評估模組 (TI-SCB) (單獨販售) 的感測器控制板 (SCB) 負責處理。直覺式 GUI 可簡化裝置配置，讓使用者能夠快速熟悉裝置操作。

使用指南: PDF | HTML
View Options
IDE、配置、編譯器或偵錯程式

ASC-STUDIO-INA780 — ASC Studio (SysConfig) for configuring all aspects of the INA780 current sensor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA780 current sensor.
支援產品和硬體

支援產品和硬體
啟動
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 (...)

支援產品和硬體

支援產品和硬體
啟動 下載
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 (...)
要求
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
View Options
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VSON (DEK) 15 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中的可靠性監測
內含資訊：
  • 晶圓廠位置
  • 組裝地點

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