INA331IDGKTG4 Equivalent & Substitute Parts

Part Overview

The INA331IDGKTG4 is an instrumentation amplifier manufactured by Texas Instruments, designed for precision signal conditioning applications requiring rail-to-rail output capability. This single-circuit amplifier operates across a 2.5 V to 5.5 V supply range and is housed in an 8-VSSOP surface mount package.

The INA331IDGKTG4 has been discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. The substitute part identified maintains identical electrical and mechanical specifications while offering active product status and significantly higher inventory availability.

Substiute Parts

INA331IDGKTG4

Texas InstrumentsIn Stock: 919INA331IDGKTG4 Datasheet

Current PartRFQ

INA331IDGKT

Texas InstrumentsIn Stock: 364625INA331IDGKT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA331IDGKTG4 is determined by strict equivalence across all electrical performance parameters and mechanical compatibility criteria. The substitute part must satisfy the following requirements:

Electrical Parameter Equivalence:

• Identical amplifier type (Instrumentation)
• Identical number of circuits (1)
• Identical output type (Rail-to-Rail)
• Identical slew rate (5 V/µs)
• Identical -3dB bandwidth (2 MHz)
• Identical input bias current (0.5 pA)
• Identical input offset voltage (250 µV)
• Identical supply current (415 µA)
• Identical output current per channel (48 mA)
• Identical supply voltage range (2.5 V to 5.5 V)
• Identical operating temperature range (-55°C to 125°C)

Mechanical Compatibility:

• Identical mounting type (Surface Mount)
• Identical package designation (8-VSSOP)
• Identical physical dimensions (8-TSSOP, 8-MSOP, 0.118", 3.00mm Width)

Regulatory Compliance:

• ROHS3 Compliant
• REACH Unaffected status maintained

The INA331IDGKT meets all substitution criteria and is the manufacturer-recommended equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The INA331IDGKT is the direct substitute for the discontinued INA331IDGKTG4. Both parts are manufactured by Texas Instruments and share identical electrical specifications and mechanical packaging.

Product Status Consideration: The INA331IDGKT maintains active product status, ensuring continued manufacturer support, availability of technical documentation, and long-term supply chain viability. The INA331IDGKTG4 has been discontinued at DiGi Electronics, making the INA331IDGKT the appropriate selection for new designs and ongoing production.

Inventory and Supply Chain: The INA331IDGKT demonstrates significantly higher inventory availability (364,522 pieces) compared to the discontinued INA331IDGKTG4 (823 pieces), supporting both immediate procurement needs and future production requirements.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying environmental and regulatory requirements for industrial and commercial applications.

Packaging and Handling: Both parts are supplied in 8-VSSOP surface mount packages with identical moisture sensitivity levels (MSL 2, 1 Year), requiring equivalent handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the INA331IDGKT be used as a direct replacement for the INA331IDGKTG4?

A: Yes. The INA331IDGKT is electrically and mechanically identical to the INA331IDGKTG4. All electrical parameters, including slew rate, bandwidth, input bias current, input offset voltage, supply current, output current, and supply voltage range are equivalent. The physical package, mounting type, and pin configuration are identical.

Q: What is the difference between INA331IDGKTG4 and INA331IDGKT?

A: The primary difference is product status and packaging format. The INA331IDGKTG4 is discontinued and was supplied in Digi-Reel format. The INA331IDGKT is an active product available in Cut Tape (CT) and Digi-Reel packaging options. Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when substituting the INA331IDGKT for the INA331IDGKTG4?

A: No compatibility concerns exist. Both parts use the 8-VSSOP package with identical pin assignments, electrical characteristics, and operating ranges. PCB layouts, circuit designs, and application schematics require no modification.

Q: What is the base product number for these parts?

A: The base product number is INA331. Both the INA331IDGKTG4 and INA331IDGKT are variants of this instrumentation amplifier series.

Q: Are both parts RoHS compliant?

A: Yes. Both the INA331IDGKTG4 and INA331IDGKT are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory standards for electronic components.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have a Moisture Sensitivity Level (MSL) of 2 with a 1-year floor life. Standard moisture control and handling procedures apply during storage and assembly.

Q: What is the operating temperature range for the INA331IDGKT?

A: The operating temperature range is -55°C to 125°C, identical to the INA331IDGKTG4, supporting applications across industrial, automotive, and military temperature specifications.