Part Number: INA148UA

Manufacturer: Texas Instruments


Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of INA148UA

Datasheet  INA148UA datasheet
Category Integrated Circuits (ICs)
Family Linear – Amplifiers – Instrumentation, OP Amps, Buffer Amps
Manufacturer Texas Instruments
Packaging Tube
Part Status Active
Amplifier Type Differential
Number of Circuits 1
Output Type
Slew Rate 1 V/μs
Gain Bandwidth Product
-3db Bandwidth 100kHz
Current – Input Bias
Voltage – Input Offset 1mV
Current – Supply 260μA
Current – Output / Channel 13mA
Voltage – Supply, Single/Dual (±) 2.7 V ~ 36 V, ±1.35 V ~ 18 V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154″, 3.90mm Width)
Supplier Device Package 8-SOIC


The INA148UA is a precision operational amplifier that can be used for a wide range of tasks that require accurate signal filtering and a high common-mode voltage range. This detailed guide will walk you through the INA148UA’s most important features, uses, and things to think about before you use it in your circuits.

Introduction to the INA148UA

The INA148UA is a precision bipolar operational amplifier with a thin-film resistor network built into a single piece. The resistors on the chip are laser-trimmed to make sure that the differential gain is always 1V/V and that the common-mode rejection is very good. It works with both a single supply and two sources, so it can be used with different voltages.

Key Features of INA148UA: Precision, Low-Power, Unity-Gain Difference Amplifier

The INA148UA is an operational amplifier that can be used for a wide range of signal-shaping tasks thanks to its unique set of features. Let’s take a closer look at each of its most important parts:

● High Common-Mode Voltage Range

The INA148UA has an impressively high common-mode voltage range, which makes it a good choice for situations where input data may have large amounts of common-mode voltage. For working with a single supply of 5V, the common-mode voltage range goes all the way up to +75V. In dual-supply mode (15V power), it can handle up to 200V in common mode. This wide range lets the amplifier handle signals in situations where the input signals have a lot of common-mode voltage. This makes sure that the signal is amplified correctly and that common-mode noise is canceled out.

● Fixed Differential Gain of 1V/V

The constant differential gain of 1V/V means that the voltage difference between the amplifier’s two input terminals is exactly equal to the voltage difference between the amplifier’s output terminals. This makes circuit design easier because the gain doesn’t have to be set or changed outside of the circuit. The fixed gain makes sure that the signal is always and reliably amplified, so you don’t have to use external parts like resistors to set the gain. This trait is especially useful in precision applications where signal conditioning must be done in a predictable way.

● Low Quiescent Current

The INA148UA has a low idle current and only uses 260A of power when it is running. Quiescent current is the amount of current that the amplifier draws when there is no information coming in. The low quiescent current is important for uses that are sensitive to power, especially battery-powered systems or devices that want to save power. The INA148UA is a great choice for portable and low-power uses because it helps the battery last longer and makes sure it works well.

● Wide Supply Range

The INA148UA works with a wide range of source voltages and can be set up with either one or two supplies. For operation with a single power source, the amplifier can work with voltages as low as 2.7V and as high as 36V. In dual-supply mode, it can be powered by voltages between 1.35V and 18V. This wide range of supply voltages makes it flexible and adaptable to different voltage needs in different uses, which makes it more useful in a wider range of circuits.

● Low Gain Error and Nonlinearity

With a maximum number of 0.075%, the INA148UA has a low gain error. A gain mistake is the difference between the real 1V/V gain and the ideal 1V/V gain. The low gain error makes sure that input signals are amplified correctly, minimizing any gain errors that could affect how well the system works as a whole.

Also, the nonlinearity of the amplifier is low, with a maximum value of 0.002%. Nonlinearity is the difference between how the amplifier’s output responds to an input signal and how it should. The low nonlinearity makes sure that the output signal is an accurate representation of the input signal over a wide range. This makes it possible to condition the signal precisely and reduces distortion in the amplified signal.

● High Common-Mode Rejection (CMR)

The INA148UA has a high CMR of 86dB, which stands for common-mode rejection ratio. CMR measures how well the amplifier can ignore common-mode signals, like noise or interference, that show up at both input terminals at the same time. The high CMR makes sure that any unwanted common-mode signals are successfully removed from the output, so the amplifier can only focus on amplifying the differential signal of interest. This function is especially important in industrial settings and other places where common-mode noise is common.

● SO-8 Package and Extended Temperature Range

The INA148UA comes in a small surface-mount SO-8 package, which has a number of benefits. The small size saves important board space, making it great for designs with limited space or PCBs with a lot of components. The surface-mount package also makes it easier to use automatic assembly methods. This makes production more efficient and cuts down on costs.

Also, the INA148UA is designed to work in industries with temperatures from -40°C to +85°C. This wide range of temperatures makes sure that the amplifier can work successfully even in harsh environments, so it can be used in industrial and outdoor settings.

The INA148UA stands out as a high-common-mode voltage range, precision, low-power, unity-gain difference amplifier. It is a great choice for applications that need accurate and reliable signal conditioning because it has a set gain, a low quiescent current, a wide supply range, a low gain error, a low nonlinearity, a high CMR, and a strong package and temperature range. The INA148UA is great at providing accurate amplification and noise rejection in a wide range of working conditions. It can be used in industrial automation, sensor signal conditioning, or instrumentation amplifiers.


The INA148UA is a unique mix of accuracy and adaptability that makes it good for a wide range of uses, including, but not limited to:

● Sensor Signal Conditioning

The INA148UA is great for amplifying and conditioning sensor data from thermocouples, strain gauges, and pressure sensors while keeping high accuracy and common-mode rejection.

● Instrumentation Amplifiers

The INA148UA can be used as a building block for instrumentation amplifiers, which are often used in measurement and data-gathering systems. It has a fixed gain of 1V/V and a high common-mode rejection.

● Industrial Automation

In industrial automation systems, the INA148UA can be used to condition signals from different sensors and actuators. This makes sure that data is collected in a reliable and accurate way.

● Current Shunt Measurement

The INA148UA can be used to boost the voltage drop across a current shunt resistor so that precise current readings can be made in applications like motor control or power management.

Application Considerations

When using the INA148UA in your circuit design, consider the following:

● Supply Voltage Selection

Based on what your application needs, choose the right supply voltage setup. The dual-supply choice lets you use negative voltage, which gives you more options for signal conditioning.

● PCB Layout and Grounding

The structure and grounding of a PCB are very important for reducing noise and keeping signal integrity. Follow the best methods to get the best results.


In conclusion, the INA148UA stands as a precision, low-power, unity-gain difference amplifier that sets new standards for accuracy and adaptability in signal conditioning applications. With its remarkable features, including a wide common-mode voltage range, low quiescent current, and wide supply range, it emerges as an outstanding choice for various circuit designs. To unleash the full potential of the INA148UA, it is crucial to tailor its implementation to the specific requirements of your application, ensuring maximum performance and efficiency.

At ICRFQ, we take pride in our unwavering commitment to delivering top-notch components and exceptional service. As your reliable source for obtaining the INA148UA, we invite you to embrace the future of power electronics with confidence. Allow ICRFQ to be your trusted partner in realizing innovative and successful projects, ensuring your journey toward excellence is met with unparalleled support and expertise. Take the first step today and experience the power of collaboration with ICRFQ – your gateway to amplified success.

4.8/5 - (397 votes)
Kevin Chen