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TL082IDRG4 Equivalent & Substitute Parts
Part Overview
The TL082IDRG4 is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a dual-channel (2 circuit) device in 8-SOIC surface mount packaging. This part is classified as Obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. The TL082IDRG4 is characterized by low input bias current (30 pA), moderate slew rate (13 V/µs), and a gain bandwidth product of 3 MHz, making it suitable for precision analog signal conditioning applications requiring low input offset voltage (3 mV) and low noise performance.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 2 | — |
| Slew Rate | 13 | V/µs |
| Gain Bandwidth Product | 3 | MHz |
| Current - Input Bias | 30 | pA |
| Voltage - Input Offset | 3 | mV |
| Current - Supply | 1.4 (x2 Channels) | mA |
| Current - Output / Channel | 10 | mA |
| Voltage - Supply Span (Min) | 10 | V |
| Voltage - Supply Span (Max) | 30 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the TL082IDRG4 is determined by strict alignment of electrical and mechanical parameters within the 8-SOIC package form factor. The primary substitution criteria are:
Direct Equivalents (Same Amplifier Type - J-FET): Substitute parts maintaining J-FET input architecture with identical or superior electrical characteristics within the specified supply voltage range (10 V to 30 V minimum) and operating temperature coverage (-40°C to 85°C). These parts preserve the low input bias current characteristic (≤30 pA) essential for precision applications.
Functional Alternatives (General Purpose Amplifiers): Parts with General Purpose amplifier topology offer broader supply voltage ranges and lower input bias current (20 nA to 100 nA), suitable for applications where J-FET input characteristics are not mandatory. These alternatives maintain the dual-channel configuration and 8-SOIC package but may exhibit different frequency response and slew rate characteristics.
Specialized Alternatives (Audio Amplifiers): Audio-grade amplifiers provide enhanced gain bandwidth product and slew rate performance, applicable to signal conditioning circuits requiring higher frequency response, though with different input bias current specifications.
All substitute parts comply with ROHS3 and maintain 8-SOIC surface mount packaging compatibility.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA/nA) | Input Offset (mV/µV) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| TL082IDRG4 | Texas Instruments | J-FET | 13 | 3 | 30 pA | 3 mV | 10 | 30 | -40 to 85 | Obsolete |
| TL082IDR | Texas Instruments | J-FET | 13 | 3 | 30 pA | 3 mV | 10 | 30 | -40 to 85 | Active |
| TL082BCD | Texas Instruments | J-FET | 13 | 3 | 30 pA | 2 mV | 10 | 30 | 0 to 70 | Obsolete |
| TL082CMX/NOPB | Texas Instruments | J-FET | 13 | 4 | 50 pA | 5 mV | 36 | 36 | 0 to 70 | Active |
| AS358MTR-E1 | Diodes Incorporated | General Purpose | — | — | 20 nA | 2 mV | 3 | 36 | -40 to 85 | Active |
| LM258DR2G | onsemi | General Purpose | — | 1 | 45 nA | 2 mV | 3 | 32 | -25 to 85 | Active |
| LM833DT | STMicroelectronics | Audio | 7 | 15 | 300 nA | 300 µV | 5 | 30 | -40 to 105 | Active |
| MC33172D | STMicroelectronics | General Purpose | 2 | 2.1 | 20 nA | 1 mV | 4 | 44 | -40 to 105 | Active |
| MC33172DT | STMicroelectronics | General Purpose | 2 | 2.1 | 20 nA | 1 mV | 4 | 44 | -40 to 105 | Active |
| MC34072DR2G | onsemi | General Purpose | 13 | 4.5 | 100 nA | 1 mV | 3 | 44 | 0 to 70 | Active |
| MC4558CDT | STMicroelectronics | General Purpose | 2.2 | 5.5 | 50 nA | 1 mV | 4 | 40 | 0 to 70 | Active |
Engineering Selection Recommendations
Primary Recommendation - Direct Equivalent:
TL082IDR (Texas Instruments, Active status) is the direct functional equivalent to TL082IDRG4. This part maintains identical J-FET input architecture, electrical specifications (13 V/µs slew rate, 3 MHz gain bandwidth product, 30 pA input bias current), and operating temperature range (-40°C to 85°C). The primary distinction is product status (Active vs. Obsolete), ensuring long-term availability and supply chain continuity. Packaging differs only in format designation (Cut Tape & Digi-Reel vs. Digi-Reel), with no impact on electrical performance or PCB assembly compatibility.
Secondary Recommendation - Enhanced Performance Alternative:
MC34072DR2G (onsemi, Active status) provides equivalent slew rate (13 V/µs) and superior gain bandwidth product (4.5 MHz) within a General Purpose amplifier topology. This part accommodates the full supply voltage range of the original (3 V to 44 V minimum span) and maintains -40°C to 70°C operating temperature coverage. The trade-off involves higher input bias current (100 nA vs. 30 pA), acceptable for applications where ultra-low input bias is not critical.
Extended Temperature Range Alternative:
MC33172DT (STMicroelectronics, Active status) extends operating temperature to -40°C to 105°C, providing superior thermal performance for industrial applications. This part maintains low input bias current (20 nA), low input offset voltage (1 mV), and broad supply voltage range (4 V to 44 V). Reduced slew rate (2 V/µs) and gain bandwidth product (2.1 MHz) require evaluation against application frequency response requirements.
Compliance Verification:
All recommended substitutes maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and 8-SOIC surface mount packaging. No additional qualification testing is specified based on provided compliance data.
Frequently Asked Questions (FAQ)
Q: Can TL082IDR directly replace TL082IDRG4 without circuit modification?
A: Yes. TL082IDR is electrically identical to TL082IDRG4 across all specified parameters: J-FET input type, 13 V/µs slew rate, 3 MHz gain bandwidth product, 30 pA input bias current, 3 mV input offset voltage, and -40°C to 85°C operating temperature. The only difference is product status (Active vs. Obsolete) and packaging format. No circuit redesign is required.
Q: What is the primary difference between J-FET and General Purpose amplifier substitutes?
A: J-FET input amplifiers (TL082 series) feature extremely low input bias current (30 pA), essential for high-impedance signal sources and precision measurement circuits. General Purpose amplifiers (AS358, LM258, MC33172, MC34072, MC4558) exhibit higher input bias current (20 nA to 100 nA) but offer broader supply voltage ranges and lower power consumption. Selection depends on whether the application requires J-FET input characteristics or can tolerate higher input bias current.
Q: Are all substitute parts compatible with 8-SOIC PCB footprints designed for TL082IDRG4?
A: Yes. All listed substitute parts are packaged in 8-SOIC (0.154", 3.90mm Width) surface mount configuration, maintaining identical PCB footprint compatibility. No layout modifications are necessary for mechanical placement.
Q: Which substitute offers the best performance for high-frequency applications?
A: LM833DT (STMicroelectronics, Audio amplifier) provides the highest gain bandwidth product (15 MHz) and extended operating temperature (-40°C to 105°C). However, this part exhibits significantly higher input bias current (300 nA) and lower slew rate (7 V/µs) compared to the original. Selection requires evaluation of specific frequency response and input impedance requirements.
Q: What is the impact of supply voltage range differences on substitution?
A: TL082IDRG4 operates within 10 V to 30 V supply span. Substitute parts with broader ranges (e.g., MC33172DT: 4 V to 44 V) offer greater design flexibility for multi-supply systems. Substitutes with narrower ranges (e.g., TL082CMX/NOPB: 36 V fixed) require verification that circuit supply voltages align with part specifications.
Q: Can General Purpose amplifiers replace J-FET amplifiers in precision measurement circuits?
A: General Purpose substitutes are acceptable only if the application can tolerate input bias current in the nanoampere range (20 nA to 100 nA) rather than picoampere range (30 pA). High-impedance signal sources (>1 MΩ) may experience unacceptable offset voltage drift with General Purpose amplifiers. Evaluation of specific circuit input impedance is required before substitution.
Q: What is the significance of Moisture Sensitivity Level (MSL) ratings?
A: All listed parts maintain MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. This eliminates the need for specialized dry-pack storage or bake-out procedures prior to assembly, simplifying procurement and inventory management.
Q: Are there any RoHS or REACH compliance concerns with these substitutes?
A: All substitute parts are ROHS3 Compliant and REACH Unaffected, matching the compliance profile of TL082IDRG4. No additional environmental qualification is required for substitution in RoHS-regulated applications.
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