会社ブログについて Mingjiada is Supply/Purchasing INA210: High-precision Current Detection Amplifier Designed Specifically for Battery Management Systems and Motor Control

Mingjiada Electronics is a long-term supplier and buyer of the NA210 (INA210AIDCKR), a high-precision, low-power bidirectional current sense amplifier manufactured by Texas Instruments (TI), which is widely used in battery management systems (BMS), motor control and industrial power supply monitoring applications. Featuring a zero-drift architecture, this device enables high-precision current measurement with a quiescent current in the microampere range, making it an ideal choice for current monitoring in embedded systems and portable devices.

I. Overview of Key Parameters for the NA210

The NA210 belongs to TI’s INA21x series of current shunt monitors, designed specifically for high-side or low-side current detection. The key specifications of this device are as follows:

Common-mode voltage range: –0.3 V to 26 V

Gain: 200 V/V

Offset voltage (maximum): ±35 µV (NA210)

Offset drift (maximum): 0.5 µV/°C

Gain error (over full temperature range, C version): ±0.5%

Quiescent current (maximum): 100 µA

Operating temperature range: –40 °C to +125 °C

Package: SC70-6 (DCK)

Supply voltage: 2.7 V to 26 V

This device supports bidirectional current sensing, enabling simultaneous monitoring of both charging and discharging currents, a feature that makes it particularly useful in battery management applications.

II. Application Scenarios: Precise Current Sensing from BMS to Motor Control

1. Battery Management System (BMS)

The INA210 performs the critical task of monitoring battery charge and discharge currents in BMS applications. Its zero-drift architecture ensures accurate detection even when the shunt voltage drop is as low as 10 mV full scale; this allows the use of shunt resistors with lower resistance values, thereby reducing power dissipation. For power-sensitive applications such as portable medical devices and smart wearables, the device’s typical quiescent current of 65 µA is particularly crucial. When the MCU is in standby mode, the system still needs to continuously monitor battery leakage current; in such cases, the milliampere-level quiescent current of conventional current sense amplifiers would rapidly drain the battery, whereas the INA210 can perform precise measurements without significantly impacting the system’s power consumption budget.

2. Motor Drive and Industrial Control

In applications such as industrial motor control and robotic servo drives, the INA210 can be used to monitor motor phase currents in real time, providing feedback signals for closed-loop control. Its wide common-mode range (up to 26 V) enables it to operate with 12 V or 24 V industrial power rails without the need for additional level-shifting or isolation circuits. The device’s high common-mode rejection ratio (CMRR) effectively suppresses common-mode noise generated during motor commutation, ensuring the purity of the current sampling signal.

3. Power Management and Overcurrent Protection

The INA210 is commonly used for load monitoring and overcurrent protection in power distribution networks. By monitoring the voltage drop across a shunt resistor, the system can assess the load status in real time and rapidly trigger protective mechanisms in the event of overcurrent or a short circuit. In applications requiring multi-channel current monitoring, such as communications infrastructure and server power supplies, its SC70-6 micro-package (requiring only a 2×2 mm pad area) facilitates high-density layouts.

4. Portable and Low-Power Embedded Systems

For battery-powered portable electronic devices, the combination of the INA210’s low power consumption and high-precision measurement offers significant advantages. With a maximum input offset voltage of just ±35 µV, and when used with a 10 mΩ shunt resistor, the equivalent current detection resolution can reach below the milliampere level, which is sufficient to detect micro-short circuits in lithium-ion batteries or no-load leakage in DC-DC converters.

III. Mingjiada Supply and Sourcing Services

As a specialist supplier of electronic components, Mingjiada Electronics maintains a long-term stock of the INA210 whilst actively seeking to purchase surplus stock of this model at competitive prices. Whether you require genuine, original INA210 components for production or need to clear stock, Mingjiada can provide flexible partnership solutions.

This device is housed in an SC70-6 package, with standard packaging of 3,000 pieces per reel. Mingjiada can provide original manufacturer packaging or customised reel services to meet procurement requirements across different quantity levels. Should you require the latest quotation or stock status for the INA210, please feel free to contact Mingjiada Electronics.

About Mingjiada: Mingjiada Electronics specialises in the supply and recycling of electronic components, covering leading brands such as TI, ADI and NXP, and is committed to providing efficient component distribution services for engineers and procurement professionals.

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