INA745B
- Low loss integrated shunt resistor
- Internal resistance: 800 µΩ, TA = 25°C
- Continuous current: ±35 A, TA = 25°C
- Peak measurement capability: ±39.32 A
- Current monitoring accuracy: A/B Grade, maximum
- Offset current: ±6.25 mA / ±62.5 mA
- Offset drift: ±30 µA/°C (A and B Grades)
- System gain error: ±0.75% / ±1.25%
- Common-mode rejection: ±0.125 / ±1.25 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 INA745x 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 ±39.32 A with common-mode voltage support from –0.1 V to +40 V.
The INA745x 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 INA745x 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.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | INA745x 40 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 | How EZShunt Technology Simplifies and Reduces Error in Shunt-Based Designs | PDF | HTML | 2024年 6月 27日 | |
EVM User's guide | INA740-INA741EVM, INA745-INA746EVM, INA780-INA781EVM User's Guide (Rev. A) | PDF | HTML | 2023年 12月 22日 | |
Certificate | INA745BEVM EU Declaration of Conformity (DoC) | 2023年 5月 18日 |
設計與開發
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INA745-INA746EVM — 適用 EZShunt™ 數位電源監控器且具內建分流電阻器的 INA745 和 INA746
INA745 和 IN746 評估模組 (EVM) 是一款精巧的平台,用於評估採用 EZShunt™ 技術的 INA745A、INA745B 或 INA746 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。
INA745-INA746EVM 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。
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
產品
精密度運算放大器 (Vos<1mV)
一般用途運算放大器
音訊運算放大器
轉阻放大器
高速運算放大器 (GBW ≥ 50 MHz)
功率運算放大器
視訊放大器
線路驅動器
轉導放大器與雷射驅動器
全差分放大器
精確 ADC
生物感測 AFE
高速 ADC (≥10 MSPS)
接收器
觸控式螢幕控制器
差分放大器
儀器放大器
音訊線路接收器
類比電流感測放大器
數位電源監測器
配備整合式分流電阻器的類比電流感測放大器
具整合式分流電阻器的數位電源監測器
晶粒與晶圓服務
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TINA-TI — 基於 SPICE 的類比模擬程式
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
VQFN (REL) | 14 | Ultra Librarian |
訂購與品質
- 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
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點