TLE2161IDR Equivalent & Substitute Parts

Part Overview

The TLE2161IDR is a J-FET operational amplifier manufactured by Texas Instruments in the Excalibur™ series. This device is a single-circuit, 8-SOIC surface mount amplifier designed for applications requiring low input bias current and high input impedance characteristics. The part is designated as Last Time Buy, indicating discontinued production status. Identification of equivalent and substitute components is necessary to ensure design continuity and procurement availability for new production runs and legacy system support.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Slew Rate	10	V/µs
Gain Bandwidth Product	6.4	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	-40 to 85	°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 TLE2161IDR is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: J-FET (required for input bias current and impedance characteristics)
Number of Circuits: 1 (single operational amplifier)
Package / Case: 8-SOIC form factor (mechanical and thermal compatibility)
Voltage - Supply Span: Minimum 7 V, Maximum 36 V (power supply compatibility)
Operating Temperature Range: Minimum -40°C (extended industrial range)

Secondary Compatibility Parameters:

Slew Rate: 10 V/µs or greater (signal fidelity)
Gain Bandwidth Product: 6.4 MHz or greater (frequency response)
Current - Input Bias: 4 pA or lower (input impedance preservation)
Current - Output / Channel: 80 mA or greater (load driving capability)

Substitute parts are grouped into two categories based on amplifier topology and performance characteristics:

Category A - J-FET Amplifiers (Direct Topology Match): AD711JRZ, AD711JRZ-REEL, AD711JRZ-REEL7, AD8510ARZ, AD8510ARZ-REEL, AD8510ARZ-REEL7, ADA4000-1ARZ, ADA4000-1ARZ-R7, ADA4000-1ARZ-RL

Category B - General Purpose Amplifier (Alternative Topology): OPA991IDBVR

Parameter Comparison

Parameter	TLE2161IDR	AD711JRZ-REEL7	AD8510ARZ-REEL7	ADA4000-1ARZ-R7	OPA991IDBVR
Amplifier Type	J-FET	J-FET	J-FET	J-FET	General Purpose
Number of Circuits	1	1	1	1	1
Slew Rate (V/µs)	10	20	20	20	21
Gain Bandwidth Product (MHz)	6.4	4	8	5	4.5
Current - Input Bias (pA)	4	15	25	5	10
Voltage - Input Offset (µV)	600	300	100	200	125
Current - Supply (µA)	290	2500	2200	1350	560
Current - Output / Channel (mA)	80	25	70	28	75
Voltage - Supply Span Min (V)	7	9	9	8	2.7
Voltage - Supply Span Max (V)	36	36	36	36	40
Operating Temperature Range (°C)	-40 to 85	0 to 70	-40 to 125	-40 to 125	-40 to 125
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	SOT-23-5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Package Compatibility (8-SOIC Form Factor):

Select from J-FET amplifier substitutes when the application requires preservation of the 8-SOIC package footprint and J-FET input stage characteristics. The AD8510ARZ-REEL7 and AD8510ARZ-REEL provide the highest gain bandwidth product (8 MHz) and lowest input offset voltage (100 µV) among J-FET options, with extended operating temperature range (-40°C to 125°C). The ADA4000-1ARZ-R7 offers the lowest input bias current (5 pA) and lowest supply current (1.35 mA), suitable for ultra-low-power applications. The AD711JRZ-REEL7 provides a mid-range performance option with 4 MHz gain bandwidth product.

For Extended Temperature Range:

Applications requiring operation beyond 85°C must use AD8510ARZ-REEL7, ADA4000-1ARZ-R7, or ADA4000-1ARZ-RL, all rated to 125°C. The AD711JRZ variants are limited to 0°C to 70°C and are not suitable for extended temperature applications.

For Minimum Supply Voltage Requirement:

Applications requiring operation at supply voltages below 8 V must use OPA991IDBVR (minimum 2.7 V). All J-FET substitutes require minimum 8 V to 9 V supply voltage.

For Alternative Package Consideration:

The OPA991IDBVR in SOT-23-5 package provides a smaller footprint alternative with rail-to-rail output capability and lower minimum supply voltage (2.7 V). This substitute is applicable only when PCB layout permits package change and rail-to-rail output is acceptable for the application.

Compliance and Certification:

All substitute parts listed are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, matching the regulatory status of the TLE2161IDR.

Frequently Asked Questions (FAQ)

Q: Can the OPA991IDBVR replace the TLE2161IDR in all applications?

A: The OPA991IDBVR is a general-purpose amplifier with different input stage topology (not J-FET). While it meets many electrical parameters, applications requiring J-FET input characteristics (ultra-low input bias current, high input impedance) must use J-FET substitutes. Additionally, the OPA991IDBVR uses SOT-23-5 package instead of 8-SOIC, requiring PCB layout modification.

Q: Which substitute provides the closest performance match to TLE2161IDR?

A: The ADA4000-1ARZ-R7 provides the closest overall performance match with J-FET input stage, 5 pA input bias current (closest to 4 pA specification), and extended temperature range to 125°C. The AD8510ARZ-REEL7 offers superior gain bandwidth product (8 MHz versus 6.4 MHz) and lower input offset voltage (100 µV versus 600 µV).

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

A: No. The AD711JRZ variants are available in Tube and Cut Tape (CT) & Digi-Reel® packaging. The AD8510ARZ variants and ADA4000-1ARZ variants are available in Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR) options. The OPA991IDBVR is available only in Cut Tape (CT) & Digi-Reel® packaging. Verify packaging availability for your procurement requirements.

Q: What is the impact of using AD711JRZ-REEL7 as a substitute?

A: The AD711JRZ-REEL7 maintains J-FET input stage and 8-SOIC package compatibility. However, it has a reduced operating temperature range (0°C to 70°C versus -40°C to 85°C) and lower gain bandwidth product (4 MHz versus 6.4 MHz). It is suitable only for applications operating within 0°C to 70°C temperature range and not requiring the full 6.4 MHz bandwidth.

Q: Can I use the OPA991IDBVR if my application requires 8-SOIC package?

A: No. The OPA991IDBVR is packaged in SOT-23-5, which is physically incompatible with 8-SOIC footprints. PCB redesign is required for this substitution. If 8-SOIC package is mandatory, select from the J-FET amplifier substitutes.

Q: What are the key differences between AD8510ARZ-REEL and AD8510ARZ-REEL7?

A: Both variants have identical electrical specifications. The difference is packaging: AD8510ARZ-REEL is supplied in Tape & Reel (TR) format, while AD8510ARZ-REEL7 is supplied in Cut Tape (CT) & Digi-Reel® format. Select based on your assembly equipment and procurement volume requirements.

Q: Is the TLE2161IDR pin-compatible with all listed substitutes?

A: Yes. All J-FET substitutes (AD711JRZ variants, AD8510ARZ variants, ADA4000-1ARZ variants) use the same 8-SOIC pinout. The OPA991IDBVR uses SOT-23-5 package with different pinout and is not pin-compatible. Verify pinout documentation before substitution.

Q: Which substitute has the lowest power consumption?

A: The ADA4000-1ARZ-R7 has the lowest supply current at 1.35 mA. The OPA991IDBVR has the lowest at 560 µA but uses a different package and topology. For 8-SOIC J-FET devices, ADA4000-1ARZ variants are the lowest power option.

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