INA190A3IDDFT Equivalent & Substitute Parts

Part Overview

The INA190A3IDDFT is a zero-drift current sense amplifier manufactured by Texas Instruments, designed for precision current measurement applications. This device integrates a single rail-to-rail output circuit in a compact TSOT-23-8 surface mount package. The INA190A3IDDFT is designated as Last Time Buy, indicating that the original part is being phased out. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring current sensing functionality with identical electrical and mechanical specifications.

Substiute Parts

INA190A3IDDFT

Texas InstrumentsIn Stock: 1344INA190A3IDDFT Datasheet

Current PartRFQ

INA190A3IDDFR

Texas InstrumentsIn Stock: 3169INA190A3IDDFR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA190A3IDDFT is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications in the following critical areas:

Electrical Parameters:

• Amplifier type (Current Sense)
• Number of circuits (1)
• Output configuration (Rail-to-Rail)
• Slew rate (0.3 V/µs)
• Gain bandwidth product (35 kHz)
• Input bias current (500 pA)
• Input offset voltage (3 µV)
• Supply current (48 µA)
• Supply voltage range (1.7 V to 5.5 V)
• Operating temperature range (-40°C to 125°C)

Mechanical Parameters:

• Package type (SOT-23-8)
• Mounting method (Surface Mount)
• Series classification (Zero-Drift)

Compliance Parameters:

• RoHS3 compliance
• Moisture sensitivity level (MSL 1)

Parts meeting all these criteria are classified as direct substitutes and are interchangeable at the component level without circuit modification.

Parameter Comparison

Engineering Selection Recommendations

The INA190A3IDDFR is the manufacturer-recommended substitute for the INA190A3IDDFT. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the INA190A3IDDFT is designated Last Time Buy, while the INA190A3IDDFR maintains Active status.

For new designs and ongoing production, the INA190A3IDDFR is the appropriate selection due to its active product status and assured long-term availability. Both parts are ROHS3 compliant and carry MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

The substitute part requires no circuit modifications, PCB layout changes, or firmware adjustments. Pin-to-pin compatibility and functional equivalence are complete across all operating conditions within the specified temperature range of -40°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can the INA190A3IDDFR be used as a direct replacement for the INA190A3IDDFT?

A: Yes. The INA190A3IDDFR is a direct substitute with identical electrical performance, package configuration, and compliance certifications. No circuit modifications are required.

Q: What is the difference between the INA190A3IDDFT and INA190A3IDDFR?

A: The parts are electrically and mechanically identical. The difference is in product lifecycle status: INA190A3IDDFT is Last Time Buy, while INA190A3IDDFR is Active. The suffix "T" indicates tape packaging, while "R" indicates reel packaging, but both are available in Cut Tape and Digi-Reel formats.

Q: Are there any supply voltage or temperature limitations when substituting?

A: No. Both parts operate identically across the full supply range of 1.7 V to 5.5 V and the complete temperature range of -40°C to 125°C.

Q: Does the substitute part meet the same compliance requirements?

A: Yes. The INA190A3IDDFR is ROHS3 compliant, REACH unaffected, and carries MSL 1 moisture sensitivity rating, identical to the original part.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. Both parts use the SOT-23-8 surface mount package with identical pinout and footprint. No PCB redesign is necessary.

Q: What is the significance of the packaging designation (CT vs. Digi-Reel)?

A: Both parts are available in Cut Tape (CT) and Digi-Reel packaging formats. The packaging format does not affect electrical performance or compatibility; it pertains only to order quantity and handling logistics.