INA133UG4 Equivalent & Substitute Parts

Part Overview

The INA133UG4 is a differential amplifier integrated circuit manufactured by Texas Instruments, designed for precision signal conditioning applications. This device features a single differential amplifier circuit in an 8-SOIC surface mount package with a slew rate of 5V/µs and -3dB bandwidth of 1.5 MHz. The INA133UG4 is classified as an obsolete product, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The availability of substitute parts ensures design continuity and supply chain reliability for applications utilizing this differential amplifier topology.

Substiute Parts

INA133UG4

Texas InstrumentsIn Stock: 1216INA133UG4 Datasheet

Current PartRFQ

INA133U

Texas InstrumentsIn Stock: 6300INA133U Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA133UG4 is determined by strict equivalence across all electrical and mechanical parameters. The primary substitute part, INA133U, maintains identical specifications across all critical performance characteristics: amplifier type, circuit count, slew rate, bandwidth, input offset voltage, supply current, output current capability, supply voltage range, and operating temperature range. Both parts utilize the same 8-SOIC surface mount package with identical physical dimensions and pinout configuration.

The substitution logic is based on the following key parameters that must remain constant:

• Amplifier Type: Differential (single circuit)
• Slew Rate: 5V/µs
• -3dB Bandwidth: 1.5 MHz
• Voltage - Input Offset: 150 µV
• Current - Supply: 950µA
• Current - Output / Channel: 32 mA
• Supply Voltage Range: 4.5V to 36V
• Operating Temperature: -40°C to 85°C
• Package: 8-SOIC surface mount

The INA133U differs from the INA133UG4 only in product status (Active versus Obsolete) and packaging format (Tube versus standard), with no electrical or functional differences.

Parameter Comparison

Engineering Selection Recommendations

The INA133U is the direct equivalent substitute for the INA133UG4. Both parts are manufactured by Texas Instruments and share identical electrical specifications, performance characteristics, and physical packaging. The INA133U maintains active product status with higher inventory availability (6200 pieces in stock versus 1134 pieces for the obsolete INA133UG4), ensuring supply chain continuity for new production and design implementations.

Both parts comply with ROHS3 requirements and carry REACH Unaffected status, meeting current environmental and regulatory standards. The identical MSL rating of 3 (168 Hours) ensures equivalent moisture handling and storage requirements during manufacturing and assembly processes.

For applications currently utilizing the INA133UG4, direct substitution with the INA133U 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 85°C and supply voltage range of 4.5V to 36V.

Frequently Asked Questions (FAQ)

Q: Can the INA133U be used as a direct replacement for the INA133UG4 in existing designs?

A: Yes. The INA133U is a direct pin-for-pin and functional equivalent. All electrical parameters, performance specifications, package dimensions, and operating characteristics are identical. No circuit redesign or PCB modifications are required.

Q: What is the primary difference between the INA133UG4 and INA133U?

A: The INA133UG4 is classified as an obsolete product, while the INA133U maintains active production status. The INA133U is supplied in Tube packaging format. All electrical and mechanical specifications are identical.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are ROHS3 compliant, carry REACH Unaffected status, and share identical MSL ratings of 3 (168 Hours). They meet equivalent environmental and regulatory requirements for industrial and commercial applications.

Q: What is the supply voltage operating range for these differential amplifiers?

A: Both the INA133UG4 and INA133U operate across a supply voltage range of 4.5V minimum to 36V maximum, supporting single or dual supply configurations within this range.

Q: Are the package dimensions identical between the INA133UG4 and INA133U?

A: Yes. Both parts use the 8-SOIC surface mount package with identical dimensions of 0.154 inches (3.90mm) width. PCB footprints and assembly processes are fully compatible.

Q: What is the input offset voltage specification for the INA133U?

A: The input offset voltage is specified at 150 µV for the INA133U, identical to the INA133UG4. This specification applies across the full operating temperature range of -40°C to 85°C.

Q: What slew rate and bandwidth performance should be expected?

A: The INA133U provides a slew rate of 5V/µs and -3dB bandwidth of 1.5 MHz, matching the INA133UG4 specifications exactly. These parameters define the frequency response and transient performance of the differential amplifier.

Q: What is the maximum output current capability per channel?

A: The maximum output current per channel is 32 mA for both the INA133UG4 and INA133U, supporting standard load impedances in differential signal conditioning applications.

Q: Is the INA133U suitable for new product designs?

A: Yes. The INA133U is an active product with robust inventory availability and full manufacturer support. It is the recommended choice for new designs requiring differential amplifier functionality in the 8-SOIC package format.