TLE2071QDRQ1 Equivalent & Substitute Parts

Part Overview

The TLE2071QDRQ1 is a J-FET input operational amplifier manufactured by Texas Instruments in the Excalibur™ series, housed in an 8-SOIC surface mount package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The part is automotive-grade with AEC-Q100 qualification, operating across a temperature range of -40°C to 125°C with a supply voltage span of 4.5V to 38V.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Slew Rate	45	V/µs
Gain Bandwidth Product	10	MHz
Current - Input Bias	20	pA
Voltage - Input Offset	490	µV
Current - Supply	1.7	mA
Current - Output / Channel	48	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	38	V
Operating Temperature	-40 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Grade	Automotive	—
Qualification	AEC-Q100	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLE2071QDRQ1 is determined by compatibility across the following critical parameters: amplifier type (J-FET vs. General Purpose), number of circuits (single circuit requirement), package type (8-SOIC form factor), supply voltage range, operating temperature range, and automotive qualification status.

The substitute parts are grouped into two categories:

Category 1: Direct Texas Instruments J-FET Equivalents These parts maintain the same amplifier type (J-FET), identical gain bandwidth product (10 MHz), and compatible slew rate (45V/µs). The TLE2071AQDRQ1 is the active production equivalent with identical electrical specifications and automotive qualification.

Category 2: Alternative J-FET Amplifiers The OP42GSZ, OP42GSZ-R7, and OP42GSZ-RL devices are J-FET amplifiers with comparable slew rate (50V/µs) and gain bandwidth product (10 MHz), maintaining the same amplifier topology. These parts operate within overlapping supply voltage ranges and temperature specifications.

Category 3: General Purpose Amplifiers The AD847ARZ, AD847ARZ-REEL, LT1008S8#PBF, and LT1008S8#TRPBF are general purpose amplifiers in the same 8-SOIC package. These represent functional alternatives where J-FET input characteristics are not mandatory and higher slew rates or bandwidth are acceptable.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	Gain Bandwidth Product (MHz)	Input Bias Current (pA/µA)	Input Offset Voltage (µV/mV)	Supply Current (mA/µA)	Output Current (mA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	Package	Status
TLE2071QDRQ1	Texas Instruments	J-FET	45	10	20 pA	490 µV	1.7 mA	48	4.5	38	-40 to 125	8-SOIC	Obsolete
TLE2071AQDRQ1	Texas Instruments	J-FET	45	10	20 pA	470 µV	1.7 mA	48	4.5	38	-40 to 125	8-SOIC	Active
OP42GSZ	Analog Devices Inc.	J-FET	50	10	130 pA	1.5 mV	5.1 mA	33	16	40	-40 to 85	8-SOIC	Active
OP42GSZ-R7	Analog Devices Inc.	J-FET	50	10	130 pA	1.5 mV	5.1 mA	33	16	40	-40 to 85	8-SOIC	Active
OP42GSZ-RL	Analog Devices Inc.	J-FET	50	10	130 pA	1.5 mV	5.1 mA	33	16	40	-40 to 85	8-SOIC	Active
AD847ARZ	Analog Devices Inc.	General Purpose	300	50	3.3 µA	500 µV	5.3 mA	32	9	36	-40 to 85	8-SOIC	Active
AD847ARZ-REEL	Analog Devices Inc.	General Purpose	300	50	3.3 µA	500 µV	5.3 mA	32	9	36	-40 to 85	8-SOIC	Active
LT1008S8#PBF	Analog Devices Inc.	General Purpose	0.2	—	100 pA	30 µV	380 µA	—	4	36	0 to 70	8-SOIC	Active
LT1008S8#TRPBF	Analog Devices Inc.	General Purpose	0.2	—	100 pA	30 µV	380 µA	—	4	36	0 to 70	8-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: TLE2071AQDRQ1

The TLE2071AQDRQ1 is the direct active equivalent manufactured by Texas Instruments. This part maintains identical electrical specifications to the obsolete TLE2071QDRQ1, including J-FET amplifier topology, 45V/µs slew rate, 10 MHz gain bandwidth product, and automotive-grade AEC-Q100 qualification. The operating temperature range (-40°C to 125°C) and supply voltage span (4.5V to 38V) are identical. This part is available in Tape & Reel packaging and carries Active product status. Selection of this part eliminates all compatibility concerns for direct replacement applications.

Secondary Recommendation: OP42GSZ, OP42GSZ-R7, OP42GSZ-RL

These Analog Devices J-FET amplifiers maintain the same amplifier topology and 10 MHz gain bandwidth product. The slew rate is marginally higher at 50V/µs compared to 45V/µs. These parts are suitable for applications where the extended slew rate is beneficial. However, the minimum supply voltage is 16V (compared to 4.5V for the TLE2071QDRQ1), and the maximum operating temperature is 85°C (compared to 125°C). These limitations restrict use to applications within the OP42 supply and temperature specifications. All three variants (OP42GSZ, OP42GSZ-R7, OP42GSZ-RL) are electrically identical and differ only in packaging configuration.

Alternative Consideration: AD847ARZ, AD847ARZ-REEL

These general purpose amplifiers offer significantly higher slew rate (300V/µs) and gain bandwidth product (50 MHz). Selection is appropriate only for applications where J-FET input characteristics are not required and higher performance metrics are beneficial. The minimum supply voltage requirement of 9V and maximum operating temperature of 85°C represent constraints compared to the TLE2071QDRQ1. Input bias current is substantially higher at 3.3µA.

Not Recommended: LT1008S8#PBF, LT1008S8#TRPBF

These general purpose amplifiers exhibit significantly reduced slew rate (0.2V/µs) and substantially lower supply current (380µA). The operating temperature range is restricted to 0°C to 70°C, which does not meet the automotive temperature specification of the original part. These parts are suitable only for low-speed, low-power applications and are not appropriate for direct replacement of the TLE2071QDRQ1.

Frequently Asked Questions (FAQ)

Q: Can the TLE2071AQDRQ1 be used as a direct replacement for the TLE2071QDRQ1?

A: Yes. The TLE2071AQDRQ1 is the active production equivalent with identical electrical specifications, package type, and automotive qualification. The only difference is product status (Active vs. Obsolete) and a marginal improvement in input offset voltage (470µV vs. 490µV). This part is the recommended replacement.

Q: What is the primary difference between the TLE2071QDRQ1 and the OP42GSZ series?

A: Both are J-FET amplifiers with 10 MHz gain bandwidth product in 8-SOIC packages. The OP42GSZ series has a higher slew rate (50V/µs vs. 45V/µs) but requires a minimum supply voltage of 16V (compared to 4.5V) and operates only to 85°C maximum (compared to 125°C). The OP42GSZ series is not suitable for applications requiring the full 4.5V to 38V supply range or extended temperature operation to 125°C.

Q: Why are the AD847ARZ and LT1008S8 parts listed as substitutes if they have different electrical characteristics?

A: These parts are listed as functional alternatives for applications where the specific J-FET input characteristics of the TLE2071QDRQ1 are not mandatory. The AD847ARZ offers higher performance (300V/µs slew rate, 50 MHz bandwidth) for applications requiring faster response. The LT1008S8 offers ultra-low power consumption (380µA) for battery-powered applications. Selection depends on application requirements beyond the basic amplifier topology.

Q: Is the TLE2071QDRQ1 automotive-qualified?

A: Yes. The TLE2071QDRQ1 carries automotive-grade classification with AEC-Q100 qualification. The active equivalent TLE2071AQDRQ1 maintains this qualification. The OP42GSZ series does not carry automotive qualification. If automotive qualification is required, the TLE2071AQDRQ1 is the only suitable replacement.

Q: What is the difference between OP42GSZ, OP42GSZ-R7, and OP42GSZ-RL?

A: These three parts are electrically identical. The designations indicate different packaging configurations: OP42GSZ is supplied in Tube packaging, OP42GSZ-R7 and OP42GSZ-RL are supplied in Tape & Reel (TR) packaging. Selection depends on production requirements and handling preferences. All three have identical electrical performance.

Q: Can the LT1008S8 series replace the TLE2071QDRQ1 in automotive applications?

A: No. The LT1008S8 series operates only to 70°C maximum temperature, which does not meet the automotive temperature specification (-40°C to 125°C) of the TLE2071QDRQ1. Additionally, the LT1008S8 is a general purpose amplifier without J-FET input characteristics. This part is not suitable for automotive applications requiring the original part's specifications.

Q: What packaging options are available for the TLE2071AQDRQ1?

A: The TLE2071AQDRQ1 is available in Tape & Reel (TR) packaging. The original TLE2071QDRQ1 packaging designation is not specified in the available data. Confirm packaging requirements with your procurement specification before finalizing the replacement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (TLE2071AQDRQ1, OP42GSZ series, AD847ARZ series, and LT1008S8 series) are ROHS3 compliant. All parts have Moisture Sensitivity Level 1 (Unlimited) and are REACH Unaffected.

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