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TL084ID Equivalent & Substitute Parts
Part Overview
The TL084ID is a J-FET input operational amplifier containing four independent circuits in a 14-SOIC surface mount package, manufactured by STMicroelectronics. This device is classified as obsolete, though 2380 pieces remain in stock as new original inventory. The TL084ID is qualified to AEC-Q100 automotive standards and operates across the temperature range of -40°C to 125°C. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and long-term supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | TL084ID Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 4 | — |
| Slew Rate | 16 | V/µs |
| Gain Bandwidth Product | 3 | MHz |
| Current - Input Bias | 20 | pA |
| Voltage - Input Offset | 3 | mV |
| Current - Supply (x4 Channels) | 1.4 | mA |
| Current - Output / Channel | 10 | mA |
| Voltage - Supply Span (Min) | 6 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
| Grade | Automotive | — |
| Qualification | AEC-Q100 | — |
Substitute Part Grouping Explanation
Substitution of the TL084ID is determined by the following critical parameters: amplifier type (J-FET), number of circuits (4), package type (14-SOIC surface mount), and electrical performance characteristics including slew rate, gain bandwidth product, input bias current, and supply voltage range.
The substitute parts are grouped into two categories:
Direct Equivalent (Functional Replacement): The ADTL084ARZ from Analog Devices Inc. maintains J-FET amplifier topology with four circuits in the same 14-SOIC package. This part demonstrates improved electrical performance while maintaining backward compatibility with the TL084ID pinout and functional requirements.
Similar Alternatives (Performance Variants): The AD8513ARZ, AD8684ARZ, and AD8674ARZ series provide four-circuit operational amplifiers in 14-SOIC packages with varying electrical characteristics. These parts accommodate applications where the TL084ID specifications can be met by alternative performance profiles while maintaining package and circuit count compatibility.
Substitution eligibility is based on:
- Identical package type (14-SOIC surface mount)
- Identical number of circuits (4)
- Compatible supply voltage range
- Operating temperature range coverage
- Compliance with RoHS3 and MSL requirements
- Active product status for long-term availability
Parameter Comparison
| Parameter | TL084ID | ADTL084ARZ | AD8513ARZ | AD8684ARZ | AD8674ARZ | Unit |
|---|---|---|---|---|---|---|
| Amplifier Type | J-FET | J-FET | J-FET | J-FET | General Purpose | — |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | — |
| Slew Rate | 16 | 20 | 20 | 9 | 4 | V/µs |
| Gain Bandwidth Product | 3 | 5 | 8 | 3.5 | 10 | MHz |
| Current - Input Bias | 20 | 2 | 25 | 6 | 3 | pA / nA |
| Voltage - Input Offset | 3 | 1.5 | 0.1 | 0.35 | 0.02 | mV / µV |
| Current - Supply (x4 Channels) | 1.4 | 1.2 | 2.2 | 0.21 | 3 | mA / µA |
| Current - Output / Channel | 10 | 27 | 70 | 12 | 20 | mA |
| Voltage - Supply Span (Min) | 6 | 8 | 10 | 9 | 10 | V |
| Voltage - Supply Span (Max) | 36 | 36 | 30 | 36 | 36 | V |
| Operating Temperature Range | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 | -40 to 85 | °C |
| Package / Case | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | — |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 | 1 | 1 | 1 | 1 | — |
| Product Status | Obsolete | Active | Active | Active | Active | — |
Engineering Selection Recommendations
ADTL084ARZ is the primary direct equivalent for TL084ID replacement. This Analog Devices part maintains J-FET amplifier architecture with four circuits in the identical 14-SOIC package. The ADTL084ARZ demonstrates superior electrical performance with improved slew rate (20 V/µs versus 16 V/µs), higher gain bandwidth product (5 MHz versus 3 MHz), and lower input bias current (2 pA versus 20 pA). The part maintains full compatibility with the TL084ID supply voltage range (8 V to 36 V minimum to maximum) and extended operating temperature range (-40°C to 125°C). ADTL084ARZ is actively manufactured and available in multiple packaging options (Tube).
AD8684ARZ provides an alternative J-FET four-circuit amplifier for applications where lower supply current consumption is prioritized. This part operates at 210 µA total supply current compared to 1.4 mA for the TL084ID, making it suitable for battery-powered or low-power applications. The AD8684ARZ maintains the 14-SOIC package and J-FET topology but operates with a reduced temperature range (-40°C to 85°C) and lower maximum supply voltage (36 V). This part is actively manufactured and available in multiple packaging configurations.
AD8513ARZ serves applications requiring higher output current capability (70 mA per channel versus 10 mA for TL084ID) and improved input offset voltage (100 µV versus 3 mV). The AD8513ARZ maintains J-FET amplifier type and four-circuit configuration in 14-SOIC package but operates with a reduced maximum supply voltage (30 V versus 36 V) and extended operating temperature range (-40°C to 125°C). This part is actively manufactured.
AD8674ARZ is a general-purpose four-circuit amplifier alternative for applications where J-FET input characteristics are not required. This part offers the highest gain bandwidth product (10 MHz) and lowest input offset voltage (20 µV) among the alternatives, with extended operating temperature range (-40°C to 85°C). The AD8674ARZ is actively manufactured and available in multiple packaging options.
All substitute parts maintain RoHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and surface mount 14-SOIC package compatibility with the TL084ID.
Frequently Asked Questions (FAQ)
Q: Can ADTL084ARZ directly replace TL084ID in existing designs?
A: Yes. The ADTL084ARZ maintains identical pinout, package type (14-SOIC), and circuit count (4) as the TL084ID. Both parts are J-FET input operational amplifiers with compatible supply voltage ranges. The ADTL084ARZ demonstrates improved electrical performance characteristics and is actively manufactured, making it suitable for direct substitution in new production and redesigns.
Q: What is the primary difference between ADTL084ARZ and AD8684ARZ?
A: Both parts are J-FET four-circuit amplifiers in 14-SOIC packages. The ADTL084ARZ provides higher slew rate (20 V/µs versus 9 V/µs), higher gain bandwidth product (5 MHz versus 3.5 MHz), and higher output current per channel (27 mA versus 12 mA). The AD8684ARZ offers significantly lower supply current consumption (210 µA total versus 1.2 mA for ADTL084ARZ), making it preferable for low-power applications. The ADTL084ARZ maintains the extended temperature range (-40°C to 125°C) while AD8684ARZ operates to 85°C maximum.
Q: Is AD8674ARZ suitable as a substitute for TL084ID?
A: AD8674ARZ is a general-purpose amplifier rather than a J-FET input type. While it provides four circuits in the same 14-SOIC package and maintains RoHS3 compliance, the different amplifier architecture (general purpose versus J-FET) results in different input bias current characteristics (3 nA versus 20 pA for TL084ID). AD8674ARZ is suitable only for applications where J-FET input characteristics are not required and where the lower slew rate (4 V/µs) and reduced operating temperature range (-40°C to 85°C) are acceptable.
Q: What packaging options are available for substitute parts?
A: ADTL084ARZ is available in Tube packaging. AD8513ARZ is available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel® configurations. AD8684ARZ is available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel® configurations. AD8674ARZ is available in Tube and Cut Tape (CT) & Digi-Reel® configurations. All packaging options maintain identical electrical specifications and 14-SOIC package dimensions.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed (ADTL084ARZ, AD8513ARZ, AD8684ARZ, and AD8674ARZ) are ROHS3 compliant with Moisture Sensitivity Level 1 (unlimited). These parts meet the same environmental and regulatory requirements as the TL084ID.
Q: What is the supply voltage compatibility between TL084ID and its substitutes?
A: The TL084ID operates with a minimum supply voltage of 6 V and maximum of 36 V. ADTL084ARZ operates from 8 V to 36 V, requiring a minimum 2 V higher supply voltage. AD8513ARZ operates from 10 V to 30 V, requiring higher minimum voltage and lower maximum voltage. AD8684ARZ operates from 9 V to 36 V. AD8674ARZ operates from 10 V to 36 V. Applications using the TL084ID at supply voltages below 8 V require verification of substitute part compatibility.
Q: Which substitute part is recommended for automotive applications?
A: The TL084ID carries AEC-Q100 automotive qualification. Among the substitute parts, ADTL084ARZ from Analog Devices Inc. is the recommended choice for automotive applications, as it maintains the same J-FET architecture, extended temperature range (-40°C to 125°C), and active manufacturing status. Verification of specific automotive qualification requirements with the component manufacturer is necessary for critical automotive applications.
Q: What is the difference in input bias current between TL084ID and ADTL084ARZ?
A: The TL084ID specifies 20 pA input bias current, while ADTL084ARZ specifies 2 pA. This represents a tenfold improvement in ADTL084ARZ, resulting in lower input offset current and reduced bias current drift with temperature. Applications sensitive to input bias current will benefit from ADTL084ARZ substitution.
Q: Can multiple substitute parts be used interchangeably in the same design?
A: No. While all substitute parts share the 14-SOIC package and four-circuit configuration, they exhibit different electrical characteristics. ADTL084ARZ, AD8513ARZ, and AD8684ARZ are J-FET types with different performance profiles, while AD8674ARZ is a general-purpose amplifier. Selection must be based on specific application requirements for slew rate, gain bandwidth product, input bias current, supply current, and operating temperature range.
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