Blog de la compañía Mingjiada Stock Supply: TI INA213 Analogue Current Sense Amplifier – A High-Precision Bidirectional Current Sensing Solution

Mingjiada stocks TI INA213 high-precision bidirectional current sense amplifiers | 50V/V gain, SC70-6 package, genuine original products

I. Product Overview

The INA213 is a high-precision, bidirectional, zero-drift current sense amplifier (CSA) launched by Texas Instruments (TI), and forms part of the INA21x series of shunt monitors. This device is capable of accurately sensing the voltage drop across a shunt resistor over a wide common-mode voltage range, independent of the supply voltage, and amplifying the weak signal into a voltage output that is easy to measure. It is widely used in applications such as overcurrent protection, precision current measurement and closed-loop feedback control.

The INA213 has a fixed gain of 50 V/V, making it a model with moderate gain within the INA21x series. The entire INA21x series offers a choice of six fixed gains: 50 V/V (INA213), 75 V/V (INA215), 100 V/V (INA214), 200 V/V (INA210), 500 V/V (INA211) and 1000 V/V (INA212), catering to current sensing requirements across different ranges.

Shenzhen Mingjiada Electronics Co., Ltd., as a globally renowned authorised independent distributor of electronic components, maintains a long-term, substantial stock of the full range of INA213 models, covering mainstream package versions such as the INA213AIDCKR, INA213AIDCKT, INA213AIRSWR and INA213BIDCKR. All products are brand-new, genuine and in ample supply; enquiries and orders are welcome.

II. Key Features and Advantages

1. Wide common-mode voltage range

The INA213 supports a wide common-mode input voltage range of –0.3 V to 26 V, enabling its use in both low-side and high-side current sensing configurations. This feature allows it to flexibly adapt to current monitoring requirements across a wide range of power rails (from low-voltage portable devices to 26 V industrial systems) without the need for complex level-shifting circuits.

2. High-Precision Zero-Drift Architecture

The INA213 employs a zero-drift/auto-zero architecture, maintaining excellent accuracy across the entire operating temperature range:

Offset voltage: as low as ±35 µV (maximum), supporting current sensing with a shunt voltage drop as low as 10 mV full scale

Offset voltage temperature drift: only 0.5 µV/°C (maximum)

Gain drift: as low as 10 ppm/°C (maximum)

Gain error (over the full temperature range): ±0.5% (C version) / ±1% (A and B versions)

Zero-drift technology virtually eliminates the impact of temperature variations on measurement accuracy, enabling the INA213 to maintain stable and reliable current sensing performance across a wide temperature range from –40°C to +125°C.

3. Bidirectional current sensing

The INA213 supports bidirectional current sensing, enabling simultaneous monitoring of current in both forward and reverse directions. This feature makes it particularly suitable for applications requiring bidirectional current monitoring, such as battery charge and discharge management and motor drive control.

4. Ultra-low power consumption

The INA213 is powered by a single supply ranging from 2.7 V to 26 V, with a maximum quiescent current of just 100 µA and a typical operating current of only 65 µA. This ultra-low power consumption makes it ideal for battery-powered devices and portable electronics.

5. Integrated Gain Resistor for Simplified Design

Unlike traditional current sense amplifiers that require external gain-setting resistors, the INA213 incorporates the gain resistor within the device, improving resistance matching and temperature drift stability. This significantly simplifies circuit design, reduces the number of external components, and enhances overall measurement accuracy.

6. Compact packaging

The INA213 is available in two package options: SC70-6 (2.00 mm × 1.25 mm) and the low-profile UQFN-10 (1.80 mm × 1.40 mm), catering to applications with varying PCB space requirements.

7. Automotive-grade version available

The INA213 is also available in an AEC-Q100-certified automotive-grade version, the INA213-Q1, suitable for automotive electronic applications such as body control modules, motor control, valve control and electronic stability control.

III. Key Technical Specifications

Fixed gain: 50 V/V

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

Supply voltage range: 2.7 V to 26 V

Offset voltage (maximum): ±35 µV

Offset voltage temperature drift (maximum): 0.5 µV/°C

Gain drift (maximum): 10 ppm/°C

Gain error (full temperature range): ±0.5% (C version) / ±1% (A/B versions)

Bandwidth: 80 kHz

Quiescent current (maximum): 100 µA

Input bias current: 28 µA

Common-mode rejection ratio (CMRR): 100–120 dB

Slew rate: 0.4 V/µs

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

Package types: SC70-6, UQFN-10

IV. Key Application Areas

Thanks to its outstanding performance characteristics, including high accuracy, wide common-mode range and low power consumption, the INA213 is widely used in the following areas:

1. Laptops and mobile phones

In portable devices, the INA213 can be used to monitor current during battery charging and discharging, ensuring that the battery management system can accurately control the charging process and protect the battery from damage caused by overcharging or over-discharging.

2. Telecommunications equipment

In telecommunications equipment such as base stations and communication power supplies, the INA213 is used for real-time current monitoring and overcurrent protection, ensuring the stable operation of communication systems.

3. Power Management

Server/data centre power supplies

DC-DC converters

Current monitoring and protection for photovoltaic inverters

4. Battery Management Systems (BMS)

The INA213 can precisely monitor the charge and discharge currents of battery packs, making it an indispensable current sensing component in BMS systems.

5. Industrial Control and Motor Drives

Current monitoring in motor drivers

Robotic joint control

Overcurrent protection circuits

6. Automotive Electronics

The INA213-Q1 automotive-grade version is suitable for automotive applications such as body control modules, motor control, electronic stability control and wireless charging transmitters.

V. Mingjiada Electronics Supply Guarantee

As a globally renowned authorised independent distributor of electronic components, Shenzhen Mingjiada Electronics Co., Ltd. maintains a long-term, substantial stock of the full range of INA213 models, whilst also covering other models in the INA21x series (INA210, INA211, INA212, INA214, INA215).

Mingjiada’s Supply Advantages:

✅ Genuine Product Guarantee: All INA213 chips are genuine Texas Instruments products, ensuring reliable performance

✅ Ample stock: We maintain a constant stock of all INA213 package variants, ensuring a swift response

✅ Comprehensive range: Covering the full series of models, including INA213AIDCKR, INA213AIDCKT, INA213AIRSWR and INA213BIDCKR

✅ Professional Service: With extensive procurement channels and a wealth of supply experience, we provide customers with high-quality component supply services

Whether you require samples during the R&D phase or bulk purchases for mass production, Mingjiada Electronics can provide you with high-quality, fast-delivery supply services for the INA213 current sense amplifier.

Contact us:

Address: Rooms 1239–1241, Guoli Building, Zhenzhong Road, Futian District, Shenzhen, Guangdong Province

Tel: 86-0755-83294757 / 0755-83957536

Mobile: +86 13410018555

Email: sales@hkmjd.com

Website: www.integrated-ic.com

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