TL082IN Equivalent & Substitute Parts

Part Overview

The TL082IN is a J-FET input operational amplifier manufactured by STMicroelectronics, configured as a dual-channel (2 circuit) device in an 8-Mini DIP package. This component is classified as obsolete, though 4200 units remain in stock as new original inventory. The TL082IN is qualified to AEC-Q100 automotive standards and operates across a supply voltage range of 6V to 36V with an operating temperature range of -40°C to 105°C.

Due to its obsolete product status, equivalent and substitute parts are necessary for ongoing design support, production continuity, and long-term component availability. Substitute devices must maintain functional compatibility through matching package type, pin configuration, circuit count, and critical electrical parameters.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	2	—
Package / Case	8-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
Slew Rate	16	V/µs
Gain Bandwidth Product	4	MHz
Current - Input Bias	20	pA
Voltage - Input Offset	3	mV
Current - Supply	1.4	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	6	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 105	°C
Grade	Automotive	—
Qualification	AEC-Q100	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TL082IN is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Package type: 8-DIP (0.300", 7.62mm) through-hole mounting
Circuit count: 2 independent amplifier circuits
Amplifier type: J-FET input topology (preferred for low input bias current)
Pin-compatible configuration

Secondary Electrical Compatibility Parameters:

Slew rate: 13V/µs or greater (TL082IN = 16V/µs)
Gain bandwidth product: 4 MHz or greater
Input bias current: 50 pA or lower
Supply voltage range: Minimum 6V, maximum 36V or greater
Output current per channel: 15 mA or greater

Compliance Requirements:

RoHS3 compliance
MSL rating of 1 (Unlimited)
REACH unaffected status

Substitute parts are grouped into two categories: Direct J-FET Substitutes (AD648, AD712, LF353, LF412) and Alternative Amplifier Types (AD706, AD827, LM4562, LME49720). Direct J-FET substitutes maintain the same input stage topology. Alternative amplifier types provide functional equivalence through different input architectures but retain 8-DIP package compatibility and dual-circuit configuration.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Product Status
TL082IN	STMicroelectronics	J-FET	16	4	20	3	6	36	-40 to 105	Obsolete
AD648JNZ	Analog Devices	J-FET	1.8	1	5	0.75	9	36	0 to 70	Active
AD648KNZ	Analog Devices	J-FET	1.8	1	3	0.3	9	36	0 to 70	Active
AD706JNZ	Analog Devices	General Purpose	0.15	0.8	50	0.03	4	36	0 to 70	Active
AD712JNZ	Analog Devices	J-FET	20	4	25	0.3	9	36	0 to 70	Active
AD712KNZ	Analog Devices	J-FET	20	4	25	0.3	9	36	0 to 70	Active
AD827JNZ	Analog Devices	General Purpose	300	50	3300	0.3	9	36	0 to 70	Active
LF353N/NOPB	Texas Instruments	J-FET	13	4	50	5	10	36	0 to 70	Active
LF412CN/NOPB	Texas Instruments	J-FET	15	4	50	1	10	40	0 to 70	Active
LM4562NA/NOPB	Texas Instruments	Audio	20	55	10	0.1	5	34	-40 to 85	Active
LME49720NA/NOPB	Texas Instruments	Audio	20	55	10	0.1	5	34	-40 to 85	Active

Engineering Selection Recommendations

Tier 1 - Direct J-FET Substitutes (Recommended for Pin-Compatible Replacement):

The AD712JNZ and AD712KNZ devices provide the closest functional equivalence to the TL082IN. Both maintain J-FET input topology, dual-circuit configuration, 8-DIP package compatibility, and matching slew rate (20V/µs) and gain bandwidth product (4 MHz). These parts are active products with full RoHS3 compliance and unlimited moisture sensitivity rating. The AD712KNZ offers superior input offset voltage (0.3 mV vs. 3 mV) and lower input bias current (25 pA vs. 20 pA). Supply voltage range is 9V to 36V, which covers the TL082IN operating range above 9V. Operating temperature range is 0°C to 70°C, which is narrower than the TL082IN automotive range (-40°C to 105°C).

The LF412CN/NOPB (Texas Instruments) provides excellent substitution with 15V/µs slew rate, 4 MHz gain bandwidth product, and extended maximum supply voltage (40V). Input bias current is 50 pA and input offset voltage is 1 mV. This device is active and widely available (44,180 units in stock). Operating temperature range is 0°C to 70°C.

The LF353N/NOPB (Texas Instruments) offers 13V/µs slew rate and 4 MHz gain bandwidth product with 50 pA input bias current. This is an active product with 7,310 units in stock and represents a cost-effective alternative.

Tier 2 - Alternative Amplifier Types (For Applications Not Requiring J-FET Input):

The LM4562NA/NOPB and LME49720NA/NOPB are audio-grade amplifiers with superior performance characteristics: 20V/µs slew rate, 55 MHz gain bandwidth product, and exceptionally low input bias current (10 nA). These devices support extended operating temperature range (-40°C to 85°C), which approaches the TL082IN automotive specification. Supply voltage range is 5V to 34V. Both are active products with high inventory availability.

The AD827JNZ is a general-purpose amplifier with significantly higher slew rate (300V/µs) and gain bandwidth product (50 MHz), suitable for high-speed applications. However, input bias current is 3.3 µA, which is substantially higher than the TL082IN and may not be suitable for low-bias-current applications.

Tier 3 - Limited Substitution (Lower Performance):

The AD648JNZ and AD648KNZ are J-FET devices with reduced slew rate (1.8V/µs) and gain bandwidth product (1 MHz). These parts are suitable only for applications where bandwidth and slew rate requirements are less stringent than the TL082IN specification.

The AD706JNZ is a general-purpose amplifier with very low slew rate (0.15V/µs) and reduced gain bandwidth product (0.8 MHz), limiting its use to low-frequency applications.

Compliance and Availability:

All substitute parts listed are RoHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited). All are packaged in 8-DIP (0.300", 7.62mm) through-hole configuration. Active product status ensures ongoing availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the AD712JNZ or AD712KNZ be used as direct replacements for the TL082IN in automotive applications?

A: The AD712JNZ and AD712KNZ are pin-compatible and functionally equivalent in terms of package, circuit count, and core electrical parameters (slew rate, gain bandwidth product). However, the operating temperature range is 0°C to 70°C, which does not meet the TL082IN automotive specification of -40°C to 105°C. These devices are suitable for non-automotive applications or automotive designs operating within the 0°C to 70°C range. For full automotive temperature compliance, the LM4562NA/NOPB or LME49720NA/NOPB offer -40°C to 85°C operation, though they are audio-grade rather than automotive-qualified.

Q: What is the significance of J-FET input topology in the TL082IN?

A: J-FET input topology provides extremely low input bias current (20 pA for the TL082IN). This characteristic is critical for high-impedance signal sources, precision instrumentation, and applications where input loading must be minimized. Direct J-FET substitutes (AD712, LF353, LF412) maintain this advantage. Alternative amplifier types (AD827, LM4562, LME49720) use different input stages and exhibit higher input bias currents, making them unsuitable for applications requiring ultra-low input bias current.

Q: Is the LF412CN/NOPB suitable for designs currently using the TL082IN?

A: Yes, the LF412CN/NOPB is a strong substitute. It maintains J-FET input topology, dual-circuit configuration, 8-DIP package, and matching slew rate (15V/µs vs. 16V/µs) and gain bandwidth product (4 MHz). Input bias current is 50 pA, which is higher than the TL082IN (20 pA) but acceptable for most applications. Input offset voltage is 1 mV, superior to the TL082IN (3 mV). The extended maximum supply voltage (40V vs. 36V) provides additional design margin. Operating temperature range is 0°C to 70°C.

Q: Why do some substitute parts have lower slew rates or gain bandwidth products than the TL082IN?

A: The AD648JNZ, AD648KNZ, and AD706JNZ are included as substitutes for applications where the TL082IN's performance specifications exceed actual design requirements. These lower-performance devices offer cost advantages and reduced power consumption. Selection should be based on the specific application's bandwidth and slew rate requirements, not on the TL082IN's maximum specifications.

Q: Can the LM4562NA/NOPB or LME49720NA/NOPB replace the TL082IN in all applications?

A: These audio-grade amplifiers provide superior performance in slew rate (20V/µs), gain bandwidth product (55 MHz), and input offset voltage (0.1 mV). However, input bias current is 10 nA, which is significantly higher than the TL082IN (20 pA). For applications requiring ultra-low input bias current, these devices are not suitable. For general-purpose and audio applications, they offer excellent performance and extended temperature range (-40°C to 85°C).

Q: What is the impact of minimum supply voltage differences between the TL082IN and substitute parts?

A: The TL082IN operates at a minimum supply voltage of 6V, while most substitute parts require 9V or 10V minimum. Designs operating at 6V to 8V supply voltage cannot use these substitutes without circuit redesign. The AD706JNZ has a 4V minimum supply voltage, making it suitable for lower-voltage applications, though it offers reduced performance in other parameters.

Q: Are all listed substitute parts available in the same packaging options as the TL082IN?

A: All substitute parts listed are available in 8-DIP (0.300", 7.62mm) through-hole package configuration, matching the TL082IN package. Supplier device packages are designated as 8-PDIP or 8-Mini DIP. Pin configuration and spacing are identical, enabling direct socket replacement without PCB modification.

Q: What is the difference between the AD712JNZ and AD712KNZ?

A: Both devices are identical in electrical performance and package configuration. The designation difference (J vs. K) typically indicates different temperature or performance grades within the same product family. For practical substitution purposes, either device is suitable. The AD712KNZ has 4,400 units in stock compared to 2,001 units for the AD712JNZ, potentially offering better availability.

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