TL082IDG4 Equivalent & Substitute Parts

Part Overview

The TL082IDG4 is a J-FET input operational amplifier featuring two independent circuits in an 8-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as obsolete, though 1,166 units remain in current inventory. The TL082IDG4 is designed for applications requiring low input bias current, moderate slew rate, and dual-channel amplification within a compact form factor.

Due to its obsolete product status, identifying equivalent and substitute parts is necessary for design continuity, long-term supply chain planning, and new production implementations. Substitute parts must maintain functional compatibility across critical electrical parameters including amplifier type, circuit count, package configuration, and operating specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	TL082IDG4
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	J-FET
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	13 V/µs
Gain Bandwidth Product	4 MHz
Current - Input Bias	30 pA
Voltage - Input Offset	3 mV
Current - Supply	1.4 mA (x2 Channels)
Current - Output / Channel	40 mA
Voltage - Supply Span (Min)	10 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TL082IDG4 are evaluated based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Amplifier Type (J-FET, Audio, or General Purpose)
Number of Circuits (2 independent channels)
Package / Case (8-SOIC form factor)
Mounting Type (Surface Mount)
Slew Rate (13 V/µs baseline)
Gain Bandwidth Product (4 MHz baseline)
Current - Input Bias (30 pA baseline)
Voltage - Input Offset (3 mV baseline)
Current - Supply (1.4 mA baseline)
Current - Output / Channel (40 mA baseline)
Voltage - Supply Span (10 V to 30 V baseline)
Operating Temperature Range (-40°C ~ 85°C baseline)

Substitute parts are grouped into the following categories:

Category 1: Direct J-FET Substitutes (Texas Instruments TL082 Series) Parts maintaining J-FET amplifier type with identical circuit count and package. These include TL082IDR, TL082BCD, and TL082CMX/NOPB, which share the same base product number and core functionality.

Category 2: Enhanced J-FET Substitutes (Automotive-Qualified) Parts with improved specifications including TL072CDT, TL082ACDT, TL082AIYDT, and TL082BCDT. These offer enhanced slew rate (16 V/µs), lower input bias current (20 pA), and automotive qualification (AEC-Q100), with extended or equivalent operating temperature ranges.

Category 3: Alternative Amplifier Type Substitutes Parts with different amplifier classifications: LM833DT (Audio Amplifier) and MC33172D/MC33172DT (General Purpose Amplifier). These provide functional alternatives with different electrical characteristics suitable for specific application requirements.

Parameter Comparison

Parameter	TL082IDG4	TL082IDR	TL082BCD	TL082CMX/NOPB	LM833DT	MC33172D	MC33172DT	TL072CDT	TL082ACDT	TL082AIYDT	TL082BCDT
Amplifier Type	J-FET	J-FET	J-FET	J-FET	Audio	General Purpose	General Purpose	J-FET	J-FET	J-FET	J-FET
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	13	13	13	13	7	2	2	16	16	16	16
Gain Bandwidth Product (MHz)	4	3	3	4	15	2.1	2.1	4	4	4	4
Current - Input Bias (pA)	30	30	30	50	300 nA	20 nA	20 nA	20	20	20	20
Voltage - Input Offset (mV)	3	3	2	5	0.3 mV	1	1	3	3	3	1
Current - Supply (mA)	1.4	1.4	1.4	3.6	4	0.22	0.22	1.4	1.4	1.4	1.4
Current - Output / Channel (mA)	40	10	10	17	37	27	27	40	40	40	40
Voltage - Supply Span Min (V)	10	10	10	36	5	4	4	6	6	6	6
Voltage - Supply Span Max (V)	30	30	30	36	30	44	44	36	36	36	36
Operating Temperature (°C)	-40 ~ 85	-40 ~ 85	0 ~ 70	0 ~ 70	-40 ~ 105	-40 ~ 105	-40 ~ 105	0 ~ 70	0 ~ 70	-40 ~ 105	0 ~ 70
Product Status	Obsolete	Active	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Automotive Qualification	None	None	None	None	None	None	None	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Active Product Status):

TL082IDR is the primary recommended substitute for the obsolete TL082IDG4. Both parts share identical J-FET amplifier architecture, dual-circuit configuration, and 8-SOIC packaging. The TL082IDR maintains the same operating temperature range (-40°C ~ 85°C) and supply voltage specifications (10 V to 30 V). TL082IDR is currently in active production status with 65,100 units in inventory, ensuring long-term supply availability. Minor differences in gain bandwidth product (3 MHz versus 4 MHz) and output current per channel (10 mA versus 40 mA) must be evaluated against specific application requirements.

For Enhanced Performance with Automotive Qualification:

TL082AIYDT provides enhanced specifications with automotive-grade AEC-Q100 qualification, extended operating temperature range (-40°C ~ 105°C), improved slew rate (16 V/µs), and reduced input bias current (20 pA). This part is suitable for applications requiring higher reliability standards and extended temperature operation. TL082AIYDT maintains the same 8-SOIC package and dual J-FET circuit configuration with 100,300 units in current inventory.

TL082BCDT offers similar automotive qualification with AEC-Q100 certification, improved slew rate (16 V/µs), and reduced input offset voltage (1 mV). Operating temperature range is limited to 0°C ~ 70°C. This part is appropriate for automotive applications within standard temperature specifications.

For Alternative Amplifier Types:

LM833DT (Audio Amplifier) provides higher gain bandwidth product (15 MHz) and extended operating temperature range (-40°C ~ 105°C), suitable for audio-frequency applications requiring wider bandwidth. However, slew rate is reduced to 7 V/µs and input bias current increases to 300 nA.

MC33172D and MC33172DT (General Purpose Amplifiers) offer significantly lower supply current (220 µA) and extended supply voltage range (4 V to 44 V), making them suitable for low-power applications. These parts sacrifice slew rate (2 V/µs) and gain bandwidth product (2.1 MHz) compared to the TL082IDG4.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, consistent with the original TL082IDG4. All parts are classified as EAR99 for export control purposes and are REACH unaffected. Automotive-qualified variants (TL072CDT, TL082ACDT, TL082AIYDT, TL082BCDT) carry AEC-Q100 certification, appropriate for automotive and high-reliability applications.

Frequently Asked Questions (FAQ)

Q: Can TL082IDR be used as a direct replacement for TL082IDG4?

A: TL082IDR is functionally compatible with TL082IDG4 for most applications. Both parts are J-FET dual-channel operational amplifiers in 8-SOIC packages with identical supply voltage ranges (10 V to 30 V) and operating temperature ranges (-40°C to 85°C). The primary difference is output current per channel: TL082IDR provides 10 mA versus 40 mA for TL082IDG4. Applications requiring the full 40 mA output current must evaluate this specification against circuit requirements. TL082IDR is in active production with significantly higher inventory availability.

Q: What is the difference between J-FET and General Purpose amplifier types?

A: J-FET amplifiers feature extremely low input bias current (typically 20-30 pA), making them suitable for high-impedance input applications and precision instrumentation. General Purpose amplifiers (such as MC33172D) have higher input bias current (20 nA) but offer lower supply current consumption and wider supply voltage ranges. Selection depends on application requirements for input impedance and power consumption.

Q: Are automotive-qualified parts (AEC-Q100) necessary for non-automotive applications?

A: Automotive qualification (AEC-Q100) is not required for non-automotive applications. However, AEC-Q100 certified parts such as TL082AIYDT, TL082ACDT, and TL082BCDT undergo additional reliability testing and are suitable for high-reliability applications beyond automotive use. These parts offer enhanced specifications including improved slew rate (16 V/µs) and reduced input bias current (20 pA) compared to the original TL082IDG4.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (Small Outline Integrated Circuit) package is a surface mount form factor with 0.154 inches (3.90 mm) width. All substitute parts listed maintain this identical package specification, ensuring direct PCB footprint compatibility. No board redesign is required when substituting between parts with matching 8-SOIC packaging.

Q: How do slew rate differences affect circuit performance?

A: Slew rate determines the maximum rate of voltage change at the amplifier output, measured in volts per microsecond (V/µs). The TL082IDG4 has a slew rate of 13 V/µs. Enhanced substitutes such as TL072CDT and TL082AIYDT offer 16 V/µs, enabling faster signal transitions. Lower slew rate alternatives such as MC33172D (2 V/µs) are suitable only for low-frequency applications. Selection depends on signal bandwidth requirements and maximum frequency content in the application.

Q: What inventory considerations apply when selecting substitute parts?

A: TL082IDG4 is obsolete with 1,166 units in current inventory. For new designs and long-term production, active-status parts are recommended. TL082IDR has 65,100 units available, TL082CMX/NOPB has 2,264 units, and automotive-qualified variants have inventory ranging from 2,200 to 100,300 units. Inventory levels should be verified with suppliers for production planning and lead time assessment.

Q: Can LM833DT or MC33172D be used in place of TL082IDG4?

A: LM833DT and MC33172D are functionally different amplifier types with different electrical characteristics. LM833DT is an audio amplifier with higher bandwidth (15 MHz) but lower slew rate (7 V/µs). MC33172D is a general-purpose amplifier with significantly lower slew rate (2 V/µs) and gain bandwidth product (2.1 MHz). These parts are suitable only for applications where the different specifications are acceptable. Direct substitution is not recommended without circuit analysis and performance verification.

Q: What is the significance of input offset voltage differences?

A: Input offset voltage is the DC voltage difference between the two input terminals when the output is zero. TL082IDG4 specifies 3 mV maximum. TL082BCD and TL082BCDT offer improved 1-2 mV specifications, reducing DC errors in precision applications. MC33172D offers 1 mV specification. LM833DT specifies 300 µV. Lower input offset voltage is beneficial for precision instrumentation and low-level signal processing applications.

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