INA198AIDBVT
Compact current shunt monitor ICs for precise electrical measurements
Manufacturer： ti
series introduction
# INA198AIDBVT Product Series Introduction
## 1. Overview
The INA198AIDBVT is a highly versatile and precision current-sensing amplifier product series offered by Texas Instruments. This series is designed to accurately measure current in a wide range of applications, providing engineers with a reliable and efficient solution for current monitoring and control.
## 2. Key Features
### 2.1 High Precision
- **Low Offset Voltage**: The INA198AIDBVT features a very low input offset voltage, typically in the range of a few millivolts. This low offset ensures accurate current measurement, especially when dealing with small currents. For example, in battery-powered applications where the current draw may be in the milliampere or even microampere range, the low offset voltage helps to minimize measurement errors.
- **High Gain Accuracy**: It offers high gain accuracy, with a specified gain error of typically less than 1%. This high accuracy is crucial in applications where precise current monitoring is required, such as in power management systems for data centers or in industrial automation where accurate current control is necessary for proper operation of equipment.
### 2.2 Wide Supply Voltage Range
- The device can operate over a wide supply voltage range, typically from 2.7V to 26V. This wide range makes it suitable for a variety of power sources, including battery-powered systems, low-voltage microcontroller-based circuits, and higher-voltage industrial applications. For instance, in a portable medical device powered by a single lithium-ion battery (around 3.7V), the INA198AIDBVT can operate effectively, while in an industrial motor control system with a 24V power supply, it can also function properly.
### 2.3 Bidirectional Current Sensing
- One of the significant advantages of the INA198AIDBVT series is its ability to sense bidirectional current. This means it can measure both positive and negative currents, which is essential in applications such as battery charging and discharging circuits. In a battery management system, the device can accurately monitor the current flowing into the battery during charging and the current flowing out of the battery during discharging, providing valuable information for battery state-of-charge estimation and protection.
### 2.4 Low Quiescent Current
- The series has a low quiescent current, typically in the range of a few microamperes. This low power consumption is beneficial in battery-powered applications where minimizing power consumption is crucial to extend the battery life. For example, in a wireless sensor node that operates on a small battery, the low quiescent current of the INA198AIDBVT helps to reduce the overall power consumption of the system.
### 2.5 Small Package Size
- The INA198AIDBVT is available in a small SOT - 23 package. This compact package size makes it suitable for space-constrained applications, such as wearable devices, mobile phones, and other portable electronics. The small footprint allows for easy integration into printed circuit boards (PCBs) with limited space.
## 3. Applications
### 3.1 Power Management
- **Battery Management Systems**: In battery-powered devices, the INA198AIDBVT can be used to monitor the charging and discharging currents of the battery. By accurately measuring the current, it helps to prevent overcharging and over - discharging, which can damage the battery and reduce its lifespan. It also provides data for estimating the state of charge (SOC) of the battery, which is crucial for proper operation and user information.
- **Power Supplies**: In power supply units, the device can be used to monitor the output current. This allows for over - current protection, ensuring that the power supply does not exceed its
Images for reference
SOT-23-5, SC-74A
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