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INA149AID The Texas Instruments INA149AID is a precision unity-gain difference amplifier designed for high common-mode voltage applications. It accurately measures small differential voltages in the presence of large common-mode signals.
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INA149AID

Available from 4 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments INA149AID is a precision unity-gain difference amplifier designed for high common-mode voltage applications. It accurately measures small differential voltages in the presence of large common-mode signals.
✓ Total Stock: 38,168 pcs
$ Price Range: $4.46

INA149AID Available from 4 distributors

✓ Authorised
✓ Non-Authorised
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

INA149AID Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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Manufacturer Name
Bandwidth
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INA149AID Description

Short technical summary and product information.

The Texas Instruments INA149AID is a high-performance, monolithic unity-gain difference amplifier. It is engineered to accurately measure small differential voltages even when subjected to very high common-mode voltage signals, up to ±275 V. This capability makes it a suitable replacement for isolation amplifiers in applications where galvanic isolation is not strictly required, potentially reducing system costs.

 

The INA149AID features a wide supply range of ±2.0 V to ±18 V and operates over an extended temperature range of -40°C to +125°C. Its input protection circuitry can withstand momentary common-mode or differential overloads of up to ±500 V, enhancing robustness in demanding environments. Key electrical specifications include a minimum CMRR of 90 dB, a maximum offset voltage of 1100 µV, and a typical bandwidth of 500 kHz.

 

This difference amplifier is housed in an 8-pin SOIC package, suitable for surface-mount assembly. The device is designed for applications requiring precise measurement of small signals in the presence of high voltages, such as industrial control systems, power monitoring, and test equipment.

INA149AID Quick Information

Product Type: Difference Amplifier
Series: INA149
Canonical Name: Texas Instruments INA149AID High Common Mode Voltage Difference Amplifier
Subcategory: Difference Amplifiers

INA149AID Compliance

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

INA149AID Estimated Pricing

Qty Low High
1+ $4.46 $4.46

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

INA149AID Features

  • Measures small differential voltages accurately.
  • Handles very high common-mode voltages up to ±275V.
  • Features ±500V input protection against overloads.
  • Operates over a wide ±2.0V to ±18V supply range.
  • Packaged in an 8-pin SOIC for surface mounting.

INA149AID Applications

  • Suitable for high-side current sensing up to 275V.
  • Used in industrial voltage monitoring circuits.
  • Ideal for high-voltage battery stack measurements.
  • Application in motor drive current feedback.
  • Use in power supply current sensing.

INA149AID FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating temperature range of the INA149AID?

-40°C to 125°C

What is the package type for the INA149AID?

SOIC-8 (8-pin SOIC)

What is the supply voltage range for the INA149AID?

±2V to ±18V

What is the common-mode voltage range of this amplifier?

±275V maximum

What is the minimum CMRR of the INA149AID?

90dB from -40°C to 125°C

What is the bandwidth of the INA149AID?

500kHz typical

What is the input protection rating?

±500V for both common-mode and differential inputs

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