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INA138NA/3K The Texas Instruments INA138NA/3K is a high-side current monitor IC designed for unipolar current sensing. It operates within a wide voltage range and offers precise measurements.
Mfr Part #:

INA138NA/3K

Available from 6 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments INA138NA/3K is a high-side current monitor IC designed for unipolar current sensing. It operates within a wide voltage range and offers precise measurements.
✓ Total Stock: 17,865 pcs
$ Price Range: $0.58

INA138NA/3K Available from 6 distributors

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INA138NA/3K Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Accuracy
Bandwidth
Function
Mounting Type
Number of Channels
Operating Temperature
Quiescent Current
Sensing Method
Supplier Device Package
Voltage
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INA138NA/3K Description

Short technical summary and product information.

The Texas Instruments INA138NA/3K is a high-side, unipolar current shunt monitor. It is designed to measure current by converting a differential input voltage to a current output, which is then converted back to a voltage using an external resistor. This device features a wide input common-mode voltage range of 2.7 V to 36 V, making it suitable for various applications.

 

Key electrical specifications include a bandwidth of 32 kHz, a maximum input offset of 1000 µV, and a gain error of ±2%. The operating temperature range is from -40°C to 125°C. The INA138NA/3K has a low quiescent current of 0.06 mA, allowing for minimal error when connecting the power supply to either side of the current measurement shunt.

 

This component is housed in a compact SOT-23-5 package, suitable for surface mount applications. Its independent supply and input common-mode voltages, along with a single resistor gain set, provide design flexibility. The accuracy of ±0.5% ensures reliable current monitoring in demanding environments.

INA138NA/3K Quick Information

Product Type: Current Monitor
Series: INA138
Canonical Name: INA138NA/3K High-Side Current Shunt Monitor
Subcategory: Analog Current-Sense Amplifiers

INA138NA/3K Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

INA138NA/3K Estimated Pricing

Qty Low High
1+ $0.58 $0.58

Estimated market price range - modelled values for guidance only, not live distributor offers.

INA138NA/3K Features

  • High-side unipolar current shunt monitor.
  • Wide 2.7V to 36V operating voltage.
  • Precise ±0.5% accuracy.
  • Compact SOT-23-5 surface mount package.
  • Wide -40°C to 125°C temperature range.

INA138NA/3K Applications

  • Ideal for high-side current sensing.
  • Suitable for power management circuits.
  • Used in battery monitoring systems.
  • Applicable for industrial controls.

INA138NA/3K FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range?

2.7 V to 36 V.

What is the operating temperature range?

-40°C to 125°C.

What package is the INA138NA/3K available in?

SOT-23-5 (also known as SC-74A, SOT-753).

What is the bandwidth of this current monitor?

32 kHz.

What is the accuracy?

±0.5%.

What is the maximum gain error?

±2%.

What is the common-mode rejection ratio?

100 dB minimum.

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