TL031IDG4 Equivalent & Substitute Parts

Part Overview

The TL031IDG4 is a J-FET input operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This single-circuit amplifier is designed for applications requiring low input bias current and low input offset voltage characteristics. The TL031IDG4 is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for ongoing production and maintenance applications.

Substiute Parts

TL031IDG4

Texas InstrumentsIn Stock: 778TL031IDG4 Datasheet

Current PartRFQ

TL031CDR

Texas InstrumentsIn Stock: 2750TL031CDR Datasheet

MFR RecommendedRFQ

TL031ID

Texas InstrumentsIn Stock: 7282TL031ID Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL031IDG4 is determined by strict equivalence across electrical and mechanical parameters. All substitute parts must maintain identical specifications for amplifier type, circuit count, slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, supply voltage range, package type, and physical dimensions.

The TL031IDG4 has two qualified substitutes within the TL031 base product family: TL031ID and TL031CDR. Both substitutes share all critical electrical parameters with the main part. The primary differentiators are packaging format (Tube versus Tape & Reel) and operating temperature range.

Key Parameters Determining Substitution:

• Amplifier Type: J-FET
• Number of Circuits: 1
• Slew Rate: 5.1 V/µs
• Gain Bandwidth Product: 1.1 MHz
• Current - Input Bias: 2 pA
• Voltage - Input Offset: 500 µV
• Current - Supply: 217 µA
• Voltage - Supply Span: 10 V to 30 V
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Parameter Comparison

Engineering Selection Recommendations

TL031ID Selection Criteria: The TL031ID is electrically and mechanically identical to the TL031IDG4. Both parts share the same operating temperature range (-40°C to 85°C), identical electrical specifications, and Tube packaging format. The TL031ID is classified as Last Time Buy, similar to the main part. Selection of TL031ID is appropriate for applications requiring extended temperature operation and direct packaging compatibility with existing assembly processes using Tube format components.

TL031CDR Selection Criteria: The TL031CDR is electrically equivalent to the TL031IDG4 across all critical parameters. The primary distinction is the operating temperature range, which is limited to 0°C to 70°C, and the packaging format, which is Tape & Reel (TR). The TL031CDR maintains Active product status, ensuring continued availability and supply chain stability. Selection of TL031CDR is appropriate for applications operating within the 0°C to 70°C temperature range and for high-volume production requiring Tape & Reel packaging format for automated assembly processes.

Compliance and Certification: All three parts (TL031IDG4, TL031ID, and TL031CDR) are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99. All parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can TL031CDR replace TL031IDG4 in all applications? A: TL031CDR is electrically equivalent to TL031IDG4 across all specified parameters. However, TL031CDR has a restricted operating temperature range of 0°C to 70°C, compared to TL031IDG4's -40°C to 85°C range. Substitution is valid only for applications operating within the 0°C to 70°C temperature window.

Q: What is the difference between Tube and Tape & Reel packaging? A: Tube packaging (TL031IDG4 and TL031ID) is used for manual assembly and lower-volume applications. Tape & Reel packaging (TL031CDR) is designed for automated pick-and-place assembly processes in high-volume production. The electrical and mechanical specifications are identical; the difference is in handling and assembly methodology.

Q: Why is TL031IDG4 classified as Last Time Buy? A: Last Time Buy status indicates that the manufacturer has announced the end of production for this part number. Existing inventory will be sold until depletion, after which the part will no longer be available. This classification necessitates identification of substitute parts for design continuity.

Q: Are all three parts pin-compatible? A: Yes. TL031IDG4, TL031ID, and TL031CDR all use the 8-SOIC package with identical pin configuration and physical dimensions (0.154", 3.90mm Width). Direct substitution on printed circuit boards is possible without layout modifications.

Q: What is the significance of ROHS3 Compliance? A: ROHS3 Compliance indicates that all three parts meet the Restriction of Hazardous Substances Directive requirements, restricting the use of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers. This certification is required for products sold in the European Union and many other regulated markets.

Q: Can TL031ID be used as a long-term replacement for TL031IDG4? A: TL031ID is electrically and mechanically identical to TL031IDG4 and shares the same Last Time Buy status. While TL031ID provides immediate substitution capability, both parts have limited future availability. For long-term supply assurance, TL031CDR (Active status) is the recommended choice, provided the application operates within the 0°C to 70°C temperature range.

Q: What are the key electrical parameters that must remain constant for substitution? A: The following parameters must remain constant for valid substitution: Amplifier Type (J-FET), Number of Circuits (1), Slew Rate (5.1 V/µs), Gain Bandwidth Product (1.1 MHz), Current - Input Bias (2 pA), Voltage - Input Offset (500 µV), Current - Supply (217 µA), and Voltage - Supply Span (10 V to 30 V). Any deviation in these parameters indicates incompatibility.