TLE2072QDRQ1 Equivalent & Substitute Parts

Part Overview

The TLE2072QDRQ1 is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a dual-channel (2 circuit) device in an 8-SOIC surface mount package. This part is classified as obsolete, with 1,339 units currently in stock. The device operates across a wide supply voltage range of 4.5V to 38V and maintains low input bias current of 1 pA, making it suitable for precision analog signal conditioning applications. Due to its obsolete status, identifying functionally equivalent active alternatives is necessary for design continuity and long-term component availability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	2	—
Slew Rate	45	V/µs
Gain Bandwidth Product	10	MHz
Current - Input Bias	1	pA
Voltage - Input Offset	300	µV
Current - Supply	3.1 (x2 Channels)	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)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLE2072QDRQ1 is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

Amplifier Type (J-FET input topology)
Number of Circuits (dual-channel configuration)
Package Type (8-SOIC form factor)
Supply Voltage Range compatibility (minimum 4.5V, maximum ≥38V)
Input Bias Current (≤1 pA for J-FET types)
Slew Rate (≥45V/µs for performance-critical applications)
Gain Bandwidth Product (≥10 MHz)

Substitution Categories:

Category 1: Direct J-FET Equivalents (Highest Compatibility)

TLE2072IDR (Texas Instruments, Active status)
AD746JRZ (Analog Devices, Active status)

These parts maintain identical J-FET input architecture, dual-channel configuration, and 8-SOIC packaging. Electrical parameters align within acceptable tolerances for direct pin-for-pin replacement.

Category 2: J-FET Alternatives with Parameter Variations

LT1169CS8#PBF (Analog Devices, Active status)
LT1169CS8#TRPBF (Analog Devices, Active status)

These devices provide J-FET input topology and dual-channel configuration in 8-SOIC packaging but exhibit reduced slew rate (4.2V/µs) and lower gain bandwidth product (5.3 MHz). Supply voltage range extends to 40V maximum.

Category 3: Voltage Feedback Amplifiers (Different Topology)

LT1355CS8 (Analog Devices, Active status)
LT1355CS8#PBF (Analog Devices, Active status)
LT1355CS8#TR (Analog Devices, Active status)
LT1355CS8#TRPBF (Analog Devices, Active status)

These parts employ voltage feedback topology rather than J-FET input, resulting in significantly higher slew rate (400V/µs) and higher gain bandwidth product (12 MHz). Input bias current is substantially higher (80 nA). Supply voltage range is 5V to 30V.

Category 4: General Purpose Amplifiers (Broadest Compatibility)

MC33078D (STMicroelectronics, Active status, Automotive qualified)
MC33078DT (STMicroelectronics, Active status, Automotive qualified)

These general-purpose dual-channel amplifiers in 8-SOIC packaging provide moderate slew rate (7V/µs) and gain bandwidth product (15 MHz). Supply range is 5V to 30V. AEC-Q100 automotive qualification is included.

Parameter Comparison

Parameter	TLE2072QDRQ1	TLE2072IDR	AD746JRZ	LT1169CS8#TRPBF	LT1355CS8#TRPBF	MC33078DT
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active
Amplifier Type	J-FET	J-FET	J-FET	J-FET	Voltage Feedback	General Purpose
Number of Circuits	2	2	2	2	2	2
Slew Rate (V/µs)	45	45	75	4.2	400	7
Gain Bandwidth Product (MHz)	10	10	13	5.3	12	15
Current - Input Bias (pA)	1	1	110	4	80 nA	250 nA
Voltage - Input Offset (µV)	300	300	300	600	300	150
Current - Supply (mA)	3.1 (x2)	3.1 (x2)	7	5.3 (x2)	1 (x2)	4
Current - Output / Channel (mA)	48	48	25	—	30	37
Voltage - Supply Span Min (V)	4.5	4.5	9	9	5	5
Voltage - Supply Span Max (V)	38	38	36	40	30	30
Operating Temperature (°C)	-40 to 125	-40 to 85	0 to 70	0 to 70	0 to 70	-40 to 105
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Qualification	—	—	—	—	—	AEC-Q100

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Electrical Equivalent):

TLE2072IDR is the primary recommended substitute. This Texas Instruments part maintains identical J-FET input architecture, dual-channel configuration, and electrical performance specifications (45V/µs slew rate, 10 MHz gain bandwidth product, 1 pA input bias current). The 8-SOIC package is mechanically identical. The part is in active production status with 15,322 units in stock. Operating temperature range is -40°C to 85°C, which is narrower than the original part (-40°C to 125°C) but suitable for most industrial and commercial applications. ROHS3 compliance and MSL 1 rating are maintained.

For Enhanced Performance (Higher Slew Rate):

AD746JRZ provides superior slew rate performance (75V/µs versus 45V/µs) while maintaining J-FET input topology and dual-channel configuration. This Analog Devices part is active and in stock (2,113 units). The gain bandwidth product is 13 MHz, exceeding the original specification. Input bias current is 110 pA, which is higher than the original 1 pA but remains within J-FET class performance. Operating temperature range is 0°C to 70°C. Supply voltage range is 9V to 36V, which is narrower than the original part. This substitute is suitable for applications requiring faster transient response.

For Low-Power Operation:

LT1355CS8#TRPBF offers significantly reduced supply current (1 mA per channel versus 3.1 mA) through voltage feedback topology. This Analog Devices part provides 400V/µs slew rate and 12 MHz gain bandwidth product, both exceeding original specifications. However, input bias current is 80 nA (substantially higher than 1 pA), and supply voltage range is limited to 5V to 30V. This substitute is appropriate for battery-powered or power-constrained applications where the higher input bias current is acceptable.

For Automotive Applications:

MC33078DT is the only substitute with AEC-Q100 automotive qualification. This STMicroelectronics part provides general-purpose amplifier topology with 7V/µs slew rate and 15 MHz gain bandwidth product. Operating temperature range extends to -40°C to 105°C, exceeding the original part. Supply voltage range is 5V to 30V. Input bias current is 250 nA. This substitute is mandatory for automotive-grade designs.

For Extended Temperature Range:

MC33078DT maintains the widest operating temperature range (-40°C to 105°C) among all substitutes, exceeding the original part's -40°C to 125°C specification at the upper limit. This part is suitable for industrial applications requiring high-temperature operation.

Frequently Asked Questions (FAQ)

Q1: Can TLE2072IDR be used as a direct pin-for-pin replacement for TLE2072QDRQ1?

A: Yes. TLE2072IDR is electrically and mechanically compatible. Both parts feature J-FET input topology, dual-channel configuration, identical slew rate (45V/µs), identical gain bandwidth product (10 MHz), and identical input bias current (1 pA). The 8-SOIC package dimensions are identical. The primary difference is operating temperature range: TLE2072IDR operates -40°C to 85°C versus the original -40°C to 125°C. For applications within the -40°C to 85°C window, this substitute requires no circuit modifications.

Q2: What is the key difference between J-FET input substitutes and voltage feedback substitutes?

A: J-FET input amplifiers (TLE2072IDR, AD746JRZ, LT1169CS8#TRPBF) feature extremely low input bias current (1 to 4 pA), making them suitable for high-impedance signal sources and precision instrumentation. Voltage feedback amplifiers (LT1355CS8 series) have higher input bias current (80 nA) but offer significantly higher slew rate (400V/µs) and lower supply current consumption. The choice depends on whether the application prioritizes input impedance characteristics or transient response speed.

Q3: Is MC33078DT suitable for precision analog applications requiring low input bias current?

A: No. MC33078DT is a general-purpose amplifier with 250 nA input bias current, which is approximately 250 times higher than the original TLE2072QDRQ1 (1 pA). This part is suitable for audio, instrumentation, and general signal conditioning where input bias current is not a critical parameter. For precision applications requiring picoampere-level input bias current, J-FET input substitutes (TLE2072IDR or AD746JRZ) are required.

Q4: Can LT1169CS8#TRPBF replace TLE2072QDRQ1 in high-speed applications?

A: No. LT1169CS8#TRPBF has significantly reduced slew rate (4.2V/µs versus 45V/µs) and lower gain bandwidth product (5.3 MHz versus 10 MHz). This part is suitable for low-frequency, low-power applications but is unsuitable for high-speed signal conditioning. For high-speed applications, AD746JRZ (75V/µs slew rate) or LT1355CS8#TRPBF (400V/µs slew rate) are more appropriate.

Q5: What are the supply voltage compatibility considerations when selecting a substitute?

A: The original TLE2072QDRQ1 operates across 4.5V to 38V. TLE2072IDR maintains this range. AD746JRZ operates 9V to 36V (narrower range). LT1169CS8#TRPBF operates 9V to 40V. LT1355CS8#TRPBF operates 5V to 30V. MC33078DT operates 5V to 30V. If the application requires operation below 5V or above 30V, only TLE2072IDR or LT1169CS8#TRPBF are compatible. Verify the actual supply voltages in your circuit before selecting a substitute.

Q6: Are all substitutes RoHS3 compliant and MSL 1 rated?

A: Yes. All recommended substitutes are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity level rating, matching the original part's environmental compliance status.

Q7: Which substitute offers the best inventory availability?

A: LT1355CS8#TRPBF has the highest inventory (50,300 units), followed by MC33078DT (133,465 units). TLE2072IDR has 15,322 units. All substitutes are in active production and readily available through standard distribution channels.

Q8: Is automotive qualification required for my application?

A: Automotive qualification (AEC-Q100) is mandatory only for components used in automotive systems subject to automotive industry standards. MC33078DT is the only substitute with AEC-Q100 qualification. For non-automotive applications, this qualification is not required.

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