INA131AP-1G4 Equivalent & Substitute Parts

Part Overview

The INA131AP-1G4 is an instrumentation amplifier manufactured by Texas Instruments, housed in an 8-PDIP package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The INA131AP-1G4 operates across a wide supply voltage range of 4.5 V to 36 V and is suitable for applications requiring precision signal conditioning with low input offset voltage and minimal input bias current.

Substiute Parts

INA131AP-1G4

Texas InstrumentsIn Stock: 1231INA131AP-1G4 Datasheet

Current PartRFQ

AMP04EPZ

Analog Devices Inc.In Stock: 1515AMP04EPZ Datasheet

MFR RecommendedRFQ

AMP04FPZ

Analog Devices Inc.In Stock: 1334AMP04FPZ Datasheet

MFR RecommendedRFQ

LT1007IN8#PBF

Analog Devices Inc.In Stock: 1024LT1007IN8#PBF Datasheet

MFR RecommendedRFQ

OP27EPZ

Analog Devices Inc.In Stock: 2211OP27EPZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA131AP-1G4 is determined by compatibility across the following critical parameters: package type (8-DIP), mounting method (through hole), operating temperature range (-40°C ~ 85°C), supply voltage compatibility, and functional classification (instrumentation or general-purpose amplifier).

The substitute parts are grouped into two functional categories:

Instrumentation Amplifier Substitutes (Direct Functional Equivalents):

• AMP04EPZ and AMP04FPZ maintain the instrumentation amplifier classification and are pin-compatible in 8-DIP packaging. Both devices operate within the -40°C ~ 85°C temperature range and support supply voltages from 5 V to 30 V, which overlaps the upper portion of the INA131AP-1G4 supply range.

General-Purpose Amplifier Substitutes (Functional Alternatives):

• OP27EPZ and LT1007IN8#PBF are general-purpose operational amplifiers in 8-DIP packages. These devices provide alternative signal conditioning capabilities with different performance characteristics. OP27EPZ operates from 0°C ~ 70°C, which represents a narrower temperature range than the main part. LT1007IN8#PBF supports the full -40°C ~ 85°C operating range and supply voltages from 8 V to 36 V.

All substitute parts share identical packaging (8-DIP), mounting type (through hole), and compliance certifications (ROHS3, REACH Unaffected, EAR99).

Parameter Comparison

Engineering Selection Recommendations

For Direct Instrumentation Amplifier Replacement:

AMP04EPZ and AMP04FPZ are the primary substitutes for the INA131AP-1G4. Both devices maintain instrumentation amplifier functionality and are available in active product status from Analog Devices Inc. These parts are ROHS3 compliant and MSL Level 1, matching the compliance profile of the original component. The AMP04 series operates within the -40°C ~ 85°C temperature range, providing full compatibility with the original specification. Supply voltage compatibility extends from 5 V to 30 V, which covers the upper range of the INA131AP-1G4 (4.5 V to 36 V). The AMP04EPZ and AMP04FPZ differ only in packaging designation (tube packaging for both) and are functionally identical. Both devices demonstrate improved bandwidth performance (700 kHz versus 70 kHz) and reduced supply current (750 µA versus 2.2 mA).

For General-Purpose Amplifier Substitution:

LT1007IN8#PBF provides an alternative when general-purpose amplifier functionality is acceptable. This device maintains full operating temperature range compatibility (-40°C ~ 85°C) and supply voltage range (8 V to 36 V). The LT1007IN8#PBF is active in product status and ROHS3 compliant. The OP27EPZ is available as a secondary general-purpose option; however, its operating temperature range (0°C ~ 70°C) is narrower than the original specification and may not be suitable for applications requiring the full -40°C ~ 85°C range.

All substitute parts are available in active product status, ensuring long-term supply continuity and technical support availability.

Frequently Asked Questions (FAQ)

Q: Can the AMP04EPZ and AMP04FPZ be used interchangeably with the INA131AP-1G4?

A: AMP04EPZ and AMP04FPZ are functionally equivalent instrumentation amplifiers in 8-DIP packages. Both maintain the same operating temperature range (-40°C ~ 85°C) and are pin-compatible. The primary difference is packaging designation. Both are suitable direct replacements where supply voltage requirements fall within 5 V to 30 V.

Q: What is the minimum supply voltage requirement for substitute parts?

A: The INA131AP-1G4 operates from 4.5 V minimum. AMP04EPZ and AMP04FPZ require 5 V minimum, representing a 0.5 V increase. LT1007IN8#PBF and OP27EPZ require 8 V minimum. Applications operating below 5 V cannot use the AMP04 series. Applications operating below 8 V cannot use the LT1007 or OP27 series.

Q: Are the general-purpose amplifiers (OP27EPZ and LT1007IN8#PBF) suitable replacements for instrumentation applications?

A: OP27EPZ and LT1007IN8#PBF are general-purpose operational amplifiers, not instrumentation amplifiers. While they provide amplification functionality in 8-DIP packages, they lack the integrated instrumentation amplifier architecture of the INA131AP-1G4 and AMP04 series. Selection depends on circuit design requirements and whether instrumentation amplifier characteristics are essential.

Q: What is the temperature range limitation of the OP27EPZ?

A: The OP27EPZ operates from 0°C to 70°C, which is narrower than the INA131AP-1G4 specification of -40°C to 85°C. Applications requiring operation below 0°C or above 70°C cannot use the OP27EPZ.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (AMP04EPZ, AMP04FPZ, LT1007IN8#PBF, and OP27EPZ) are ROHS3 compliant and MSL Level 1, matching the compliance certification of the INA131AP-1G4.

Q: What is the packaging difference between AMP04EPZ and AMP04FPZ?

A: Both AMP04EPZ and AMP04FPZ are supplied in tube packaging. The designation difference (E versus F) reflects manufacturing or distribution variants. Electrical and functional specifications are identical.

Q: Can the INA131AP-1G4 be replaced in applications requiring supply voltages below 5 V?

A: No. The AMP04 series (primary instrumentation amplifier substitutes) requires minimum 5 V supply. The INA131AP-1G4 operates from 4.5 V. Applications with supply voltages between 4.5 V and 5 V cannot use the AMP04 series and must retain the original component or identify alternative solutions.

Q: What inventory status should be considered when selecting a substitute?

A: All substitute parts are listed as active products with available inventory. AMP04EPZ has 1410 units in stock, AMP04FPZ has 1320 units, LT1007IN8#PBF has 923 units, and OP27EPZ has 2200 units available. The original INA131AP-1G4 is obsolete with 1166 units remaining in stock.