INA111BUG4 Equivalent & Substitute Parts

Part Overview

The INA111BUG4 is a high-speed, FET-input instrumentation amplifier manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device is designed for precision signal conditioning applications requiring low input bias current and wide supply voltage range operation. The INA111BUG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

INA111BUG4

Texas InstrumentsIn Stock: 1124INA111BUG4 Datasheet

Current PartRFQ

INA111BU

Texas InstrumentsIn Stock: 1368INA111BU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA111BUG4 is determined by electrical and mechanical parameter equivalence across the instrumentation amplifier category. The critical parameters governing substitution are:

Electrical Parameters:

• Amplifier Type: Instrumentation
• Number of Circuits: 1
• Slew Rate: 17 V/µs
• -3dB Bandwidth: 2 MHz
• Current - Input Bias: 2 pA
• Voltage - Input Offset: 100 µV
• Current - Supply: 3.3 mA
• Current - Output / Channel: 30 mA
• Voltage - Supply Span: 12 V to 36 V
• Operating Temperature Range: -40°C to 85°C

Mechanical Parameters:

• Package / Case: 16-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 3 (168 Hours)

Substitute parts must match all electrical specifications, maintain identical package geometry and mounting type, and satisfy the same compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

The INA111BU serves as the direct substitute for the discontinued INA111BUG4. Both parts are manufactured by Texas Instruments and share identical electrical specifications, package geometry, and compliance certifications.

Selection Basis:

The INA111BU is the manufacturer-recommended substitute, maintaining full electrical and mechanical compatibility with the INA111BUG4. The primary distinction is product status: the INA111BUG4 is discontinued, while the INA111BU remains in active production with confirmed inventory availability.

Both parts satisfy ROHS3 compliance and identical moisture sensitivity requirements, ensuring compatibility with current manufacturing and environmental standards. The 16-SOIC surface mount package is identical between both devices, permitting direct PCB layout reuse without modification.

For applications currently utilizing the INA111BUG4, transition to the INA111BU requires no circuit redesign, no PCB layout changes, and no performance trade-offs.

Frequently Asked Questions (FAQ)

Q: Can the INA111BU directly replace the INA111BUG4 on existing PCBs?

A: Yes. The INA111BU is electrically and mechanically identical to the INA111BUG4. Both devices use the 16-SOIC surface mount package with identical pin configuration, electrical performance, and operating characteristics. No PCB modifications are required.

Q: What is the difference between INA111BUG4 and INA111BU?

A: The INA111BUG4 and INA111BU are functionally equivalent instrumentation amplifiers from Texas Instruments. The primary difference is packaging designation and product status. The INA111BUG4 is discontinued, while the INA111BU remains in active production.

Q: Are the supply voltage requirements identical?

A: Yes. Both the INA111BUG4 and INA111BU operate across the same supply voltage range of 12 V to 36 V, with identical current consumption of 3.3 mA.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the INA111BUG4 and INA111BU are ROHS3 compliant and carry identical Moisture Sensitivity Level 3 (168 Hours) ratings.

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

A: Both devices operate across the temperature range of -40°C to 85°C, supporting industrial and commercial applications.

Q: Are there any differences in input bias current or input offset voltage?

A: No. Both parts specify identical input bias current of 2 pA and input offset voltage of 100 µV, ensuring equivalent precision performance in signal conditioning applications.

Q: Can I use the INA111BU in high-speed applications?

A: Yes. The INA111BU maintains the same slew rate of 17 V/µs and -3dB bandwidth of 2 MHz as the INA111BUG4, supporting equivalent high-speed signal processing requirements.