TLE2061MDG4 Equivalent & Substitute Parts Reference

Part Overview

The TLE2061MDG4 is a J-FET input operational amplifier manufactured by Texas Instruments, part of the Excalibur™ series. This single-circuit 8-SOIC surface mount device is designed for applications requiring low input bias current and high input impedance characteristics. The device operates across a wide supply voltage range of 7V to 36V with an operating temperature range of -55°C to 125°C.

The TLE2061MDG4 is currently in Last Time Buy status, indicating that production has been discontinued. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Slew Rate	3.4	V/µs
Gain Bandwidth Product	2	MHz
Current - Input Bias	4	pA
Voltage - Input Offset	600	µV
Current - Supply	290	µA
Current - Output / Channel	80	mA
Voltage - Supply Span (Min)	7	V
Voltage - Supply Span (Max)	36	V
Operating Temperature Range	-55 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TLE2061MDG4 is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: J-FET (required for low input bias current performance)
Number of Circuits: 1 (functional equivalence)
Package / Case: 8-SOIC form factor (mechanical compatibility)
Mounting Type: Surface Mount (assembly compatibility)
Supply Voltage Range: Minimum 7V, Maximum 36V (operational compatibility)
Operating Temperature Range: Must support -55°C to 125°C or equivalent industrial range

Secondary Compatibility Parameters:

Slew Rate: 3.4 V/µs or greater
Gain Bandwidth Product: 2 MHz or greater
Input Bias Current: 4 pA or lower
Input Offset Voltage: 600 µV or lower
Output Current: 80 mA or greater per channel

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (Same Circuit Count): Parts with identical single-circuit J-FET architecture and matching electrical specifications. These provide pin-for-pin compatibility with minimal design verification.

Category B - Functional Alternatives (Different Circuit Count): Parts with dual-circuit J-FET architecture that can be used in single-circuit applications. These require design consideration due to different circuit topology but maintain J-FET input characteristics and 8-SOIC packaging.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Packaging	Status
TLE2061MDG4	Texas Instruments	J-FET	1	3.4	2	4	600	7	36	-55 to 125	Tube	Last Time Buy
TLE2061IDR	Texas Instruments	J-FET	1	3.4	2	4	600	7	36	-40 to 85	Tape & Reel	Active
TLE2061MD	Texas Instruments	J-FET	1	3.4	2	4	600	7	36	-55 to 125	Tube	Last Time Buy
AD8682ARZ	Analog Devices Inc.	J-FET	2	9	3.5	6	350	9	36	-40 to 85	Tube	Active
OP282GSZ	Analog Devices Inc.	J-FET	2	9	4	3	200	9	36	-40 to 85	Tube	Active
OP282GSZ-REEL	Analog Devices Inc.	J-FET	2	9	4	3	200	9	36	-40 to 85	Cut Tape & Digi-Reel	Active
TL062ACDT	STMicroelectronics	J-FET	2	3.5	1	30	3000	6	36	0 to 70	Cut Tape & Digi-Reel	Active
LM258AWDT	STMicroelectronics	General Purpose	2	0.6	1.1	20000	1000	3	30	-40 to 105	Cut Tape & Digi-Reel	Active

Engineering Selection Recommendations

Recommended Primary Substitute: TLE2061IDR

The TLE2061IDR is the manufacturer-recommended direct equivalent. It maintains identical electrical specifications to the TLE2061MDG4 across all critical parameters: J-FET amplifier type, single circuit configuration, 3.4 V/µs slew rate, 2 MHz gain bandwidth product, 4 pA input bias current, and 600 µV input offset voltage. The device is packaged in Tape & Reel format and carries Active product status, ensuring long-term availability. The operating temperature range is -40°C to 85°C, which is narrower than the original part but suitable for most industrial and commercial applications. This part is recommended for new designs and ongoing production requiring direct pin-for-pin replacement.

Secondary Substitute: TLE2061MD

The TLE2061MD provides identical electrical performance to the TLE2061MDG4 and maintains the extended operating temperature range of -55°C to 125°C. It is packaged in Tube format matching the original part's packaging. However, this part also carries Last Time Buy status, limiting its suitability for long-term supply chain planning. Use this part only when extended temperature range is mandatory and TLE2061IDR is unsuitable.

Alternative Substitutes for Dual-Circuit Applications: OP282GSZ and OP282GSZ-REEL

The OP282GSZ and OP282GSZ-REEL are dual-circuit J-FET amplifiers manufactured by Analog Devices Inc. These parts offer superior electrical performance with 9 V/µs slew rate, 4 MHz gain bandwidth product, 3 pA input bias current, and 200 µV input offset voltage. Both parts are in Active status with high inventory availability. The OP282GSZ-REEL variant is available in Cut Tape & Digi-Reel packaging for automated assembly. These parts are suitable for applications where a single circuit of the TLE2061MDG4 can be replaced by one circuit of a dual-circuit device, provided the second circuit is either unused or utilized in the design. Design verification is required to confirm functional compatibility.

Alternative Substitute: AD8682ARZ

The AD8682ARZ is a dual-circuit J-FET amplifier from Analog Devices Inc. with enhanced performance characteristics: 9 V/µs slew rate and 3.5 MHz gain bandwidth product. Input bias current is 6 pA and input offset voltage is 350 µV. The minimum supply voltage is 9V, which is higher than the TLE2061MDG4's 7V minimum. This part is suitable only for applications with supply voltages of 9V or greater. Active product status ensures availability.

Not Recommended: LM258AWDT and TL062ACDT

The LM258AWDT is a general-purpose amplifier with significantly different electrical characteristics, including 20 nA input bias current and 1 mV input offset voltage. This part does not meet the low input bias current requirements of J-FET applications and is not suitable as a substitute.

The TL062ACDT is a dual-circuit J-FET amplifier with reduced performance specifications: 1 MHz gain bandwidth product and 3 mV input offset voltage. The operating temperature range is limited to 0°C to 70°C, which does not support the extended industrial temperature range of the original part. This part is not recommended for direct substitution.

Frequently Asked Questions (FAQ)

Q1: Can TLE2061IDR be used as a direct replacement for TLE2061MDG4?

A: Yes. The TLE2061IDR is the manufacturer-recommended equivalent with identical electrical specifications and 8-SOIC packaging. The primary difference is the operating temperature range (-40°C to 85°C versus -55°C to 125°C) and packaging format (Tape & Reel versus Tube). For applications operating within -40°C to 85°C, TLE2061IDR provides direct pin-for-pin compatibility with no design changes required.

Q2: What is the difference between TLE2061MD and TLE2061IDR?

A: Both parts are single-circuit J-FET amplifiers with identical electrical performance. The TLE2061MD is packaged in Tube format and supports the extended temperature range of -55°C to 125°C. The TLE2061IDR is packaged in Tape & Reel format and operates from -40°C to 85°C. Both parts carry different product status designations. Select TLE2061MD only when extended temperature range is required; otherwise, TLE2061IDR is preferred due to Active status.

Q3: Can dual-circuit J-FET amplifiers like OP282GSZ replace the single-circuit TLE2061MDG4?

A: Dual-circuit amplifiers can be used in single-circuit applications by utilizing only one of the two circuits. The OP282GSZ and OP282GSZ-REEL offer superior electrical performance with higher slew rate (9 V/µs), higher gain bandwidth product (4 MHz), and lower input bias current (3 pA). However, design verification is required to confirm that the unused second circuit does not introduce noise or stability issues. These parts are suitable for new designs where dual-circuit capability provides system benefits.

Q4: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters are: (1) Amplifier Type—must be J-FET for low input bias current; (2) Package / Case—must be 8-SOIC for mechanical compatibility; (3) Supply Voltage Range—must support the application's operating voltage; (4) Operating Temperature Range—must encompass the application's temperature requirements; (5) Slew Rate and Gain Bandwidth Product—must meet or exceed the original part's specifications; (6) Input Bias Current and Input Offset Voltage—must be equal to or lower than the original part to maintain signal integrity.

Q5: Why is the TLE2061MDG4 in Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part. Customers are advised to transition to alternative parts for new designs. The TLE2061IDR is the recommended successor with Active status and long-term availability.

Q6: Are there any RoHS or compliance differences between substitute parts?

A: All substitute parts listed are ROHS3 Compliant, REACH Unaffected, and carry ECCN EAR99 classification, matching the compliance profile of the TLE2061MDG4. No additional compliance verification is required when substituting between these parts.

Q7: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is used for manual handling and lower-volume applications, with parts supplied in plastic tubes. Tape & Reel packaging is used for automated assembly processes, with parts supplied on continuous tape wound on reels. Both formats contain the same electronic component; the difference is in handling and assembly compatibility. Select packaging based on manufacturing process requirements.

Q8: Can LM258AWDT be used as a substitute for TLE2061MDG4?

A: No. The LM258AWDT is a general-purpose amplifier with fundamentally different input characteristics. Input bias current is 20 nA (compared to 4 pA for TLE2061MDG4), and input offset voltage is 1 mV (compared to 600 µV). These differences make it unsuitable for applications requiring the low input bias current and high input impedance of J-FET amplifiers. This part is not recommended.

Q9: What inventory considerations should be evaluated when selecting a substitute?

A: Inventory availability directly impacts supply chain reliability. TLE2061IDR has 12,700 pieces in stock, OP282GSZ has 25,333 pieces, and OP282GSZ-REEL has 18,270 pieces. These high inventory levels ensure consistent availability for production. TLE2061MD has only 927 pieces and Last Time Buy status, limiting its suitability for long-term programs. For new designs, select parts with Active status and high inventory levels.

Q10: Is design verification required when substituting the TLE2061MDG4?

A: For direct equivalents like TLE2061IDR with identical specifications and packaging, design verification is minimal. For dual-circuit alternatives like OP282GSZ, verification is required to confirm that circuit topology changes and the presence of an unused second circuit do not affect system performance. For parts with different electrical specifications, comprehensive verification including frequency response, noise performance, and temperature stability testing is necessary.

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