INA281A5IDBVT Equivalent & Substitute Parts

Part Overview

The INA281A5IDBVT is a current sense amplifier manufactured by Texas Instruments, designed for single-circuit current sensing applications. This linear amplifier operates across a wide supply voltage range of 2.7 V to 20 V and is housed in a compact SOT-23-5 surface mount package. The device is classified as Last Time Buy, indicating discontinued production status. Identification of equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

INA281A5IDBVT

Texas InstrumentsIn Stock: 1240INA281A5IDBVT Datasheet

Current PartRFQ

INA281A5IDBVR

Texas InstrumentsIn Stock: 3554INA281A5IDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA281A5IDBVT is determined by electrical and mechanical parameter equivalence within the current sense amplifier category. The primary substitution criteria are:

Electrical Parameters:

• Slew Rate: 2.5 V/µs
• Gain Bandwidth Product: 900 kHz
• Input Bias Current: 20 µA
• Input Offset Voltage: 15 µV
• Supply Current: 1.5 mA
• Supply Voltage Range: 2.7 V to 20 V
• Operating Temperature: -40°C to 125°C

Mechanical Parameters:

• Package Type: SOT-23-5 (SC-74A, SOT-753)
• Mounting: Surface Mount
• Number of Circuits: 1

Compliance Parameters:

• RoHS3 Compliance
• Moisture Sensitivity Level 1

Substitute parts must match all electrical specifications, maintain identical package configuration, and satisfy the same compliance requirements to ensure direct functional replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The INA281A5IDBVR serves as the direct substitute for the INA281A5IDBVT. Both devices are manufactured by Texas Instruments and share identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status: the INA281A5IDBVT is designated Last Time Buy, while the INA281A5IDBVR maintains Active status with higher inventory availability (3457 units versus 1175 units).

For new designs or production continuity, the INA281A5IDBVR is the appropriate selection. Both parts satisfy ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The identical electrical parameters—including slew rate, gain bandwidth product, input bias current, input offset voltage, and supply specifications—confirm functional equivalence without requiring circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the INA281A5IDBVR directly replace the INA281A5IDBVT in existing designs?

A: Yes. The INA281A5IDBVR is a direct substitute. All electrical parameters, package configuration, and compliance certifications are identical. No circuit redesign or PCB modification is required.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. The INA281A5IDBVT is Last Time Buy (discontinued), while the INA281A5IDBVR is Active (current production). Electrical specifications and packaging are identical.

Q: Are both parts available in the same package?

A: Yes. Both the INA281A5IDBVT and INA281A5IDBVR are supplied in SOT-23-5 (SC-74A, SOT-753) surface mount packages with identical pin configurations.

Q: Do these parts have the same supply voltage requirements?

A: Yes. Both devices operate across the identical supply voltage range of 2.7 V to 20 V and draw 1.5 mA supply current.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level 1 (Unlimited).

Q: What is the operating temperature range for both parts?

A: Both the INA281A5IDBVT and INA281A5IDBVR operate across -40°C to 125°C (TA).

Q: Can I use either part interchangeably in production?

A: Yes, provided the INA281A5IDBVR is available. For new production, the INA281A5IDBVR is recommended due to its Active status and higher inventory levels.