TL034AID Equivalent & Substitute Parts

Part Overview

The TL034AID is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TL034AID operates across a supply voltage range of 10V to 30V and is suitable for applications requiring low input bias current and low input offset voltage characteristics inherent to J-FET amplifier designs.

Identification of equivalent and substitute parts is necessary due to the Last Time Buy status of the TL034AID. Alternative components with compatible electrical and mechanical specifications ensure design continuity and long-term supply chain reliability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	4	—
Slew Rate	5.1	V/µs
Gain Bandwidth Product	1.1	MHz
Current - Input Bias	2	pA
Voltage - Input Offset	580	µV
Current - Supply (x4 Channels)	870	µA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TL034AID is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

Amplifier Type: J-FET (for low input bias current performance)
Number of Circuits: 4
Package / Case: 14-SOIC compatible
Mounting Type: Surface Mount
Supply Voltage Range: Minimum 10V to Maximum 30V
Operating Temperature Range: Must encompass -40°C to 85°C or be compatible with application requirements
Output Current per Channel: 40 mA minimum

Substitution Categories:

Category 1: Direct Manufacturer Equivalent (Packaging Variant) The TL034AIDR is the tape and reel packaging variant of the TL034AID base product. All electrical specifications are identical; only the packaging format differs (Tube vs. Tape & Reel). This part is Active status with higher inventory availability.

Category 2: J-FET Amplifiers with Enhanced Performance The LF247DT and LF347D/LF347DT are J-FET amplifiers manufactured by STMicroelectronics. These parts maintain the 4-circuit configuration and 14-SOIC package but feature enhanced slew rate (16V/µs vs. 5.1V/µs) and higher gain bandwidth product (3-4 MHz vs. 1.1 MHz). Supply voltage span is fixed at 44V. Operating temperature ranges vary by grade.

Category 3: General Purpose Amplifiers The LM224ADT, LM248DT, LM2902AWYDT, LM324ADR2G, and LM324AWDT are general purpose amplifiers with 4-circuit configuration in 14-SOIC packages. These parts differ from the TL034AID in amplifier type (General Purpose vs. J-FET) and exhibit higher input bias current (20-40 nA vs. 2 pA). Supply voltage ranges are broader (3V to 30V or 32V). These parts are suitable only when J-FET input characteristics are not required.

Category 4: J-FET Amplifier with Ultra-Low Input Bias Current The LT1465CS#PBF is a J-FET amplifier from Analog Devices Inc. with exceptional input bias current (0.5 pA) and lower supply current (145µA vs. 870µA). Operating temperature range is -40°C to 85°C, matching the TL034AID. Supply voltage span is 10V to 30V.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA/nA)	Input Offset (µV/mV)	Supply Current (µA/mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Status	Packaging
TL034AID	Texas Instruments	J-FET	5.1	1.1	2 pA	580 µV	870 µA	40	10	30	-40 to 85	Last Time Buy	Tube
TL034AIDR	Texas Instruments	J-FET	5.1	1.1	2 pA	580 µV	870 µA	40	10	30	-40 to 85	Active	Tape & Reel
LF247DT	STMicroelectronics	J-FET	16	4	20 pA	3 mV	1.4 mA	40	44	44	-40 to 105	Active	Tape & Reel
LF347D	STMicroelectronics	J-FET	16	3	20 pA	3 mV	1.4 mA	40	44	44	0 to 70	Active	Tube
LF347DT	STMicroelectronics	J-FET	16	4	20 pA	3 mV	1.4 mA	40	44	44	0 to 70	Active	Cut Tape & Digi-Reel
LM224ADT	STMicroelectronics	General Purpose	0.4	1.3	20 nA	2 mV	1.5 mA	40	3	30	-40 to 105	Active	Cut Tape & Digi-Reel
LM248DT	STMicroelectronics	General Purpose	0.5	1.3	30 nA	1 mV	2.1 mA	25	44	44	-40 to 105	Active	Tape & Reel
LM2902AWYDT	STMicroelectronics	General Purpose	0.4	1.3	20 nA	2 mV	1.5 mA	40	3	30	-40 to 125	Active	Tape & Reel
LM324ADR2G	onsemi	General Purpose	—	1	40 nA	2 mV	1.5 mA	40	3	32	0 to 70	Active	Cut Tape & Digi-Reel
LM324AWDT	STMicroelectronics	General Purpose	0.4	1.3	20 nA	2 mV	1.5 mA	40	3	30	0 to 70	Active	Tape & Reel
LT1465CS#PBF	Analog Devices Inc.	J-FET	0.9	1	0.5 pA	600 µV	145 µA	—	10	30	-40 to 85	Active	Tube

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

The TL034AIDR is the recommended substitute when packaging format change is acceptable. This part maintains all electrical specifications of the TL034AID while offering Active product status and significantly higher inventory availability (17,371 pcs vs. 653 pcs). Both parts are ROHS3 compliant with identical MSL ratings. The only difference is packaging format: Tape & Reel versus Tube. This substitution requires no circuit redesign or performance validation.

For J-FET Amplifier Applications Requiring Enhanced Performance:

The LF247DT and LF347DT are suitable when higher slew rate (16V/µs) and gain bandwidth product (4 MHz) are beneficial to the application. Both parts maintain J-FET input characteristics with 4-circuit configuration in 14-SOIC packages. However, the fixed supply voltage span of 44V differs from the TL034AID's 10V to 30V range. These parts are Active status with high inventory availability. Operating temperature range extends to 105°C for LF247DT.

The LF347D offers identical performance to LF347DT with Tube packaging and Active status, suitable for applications where tape and reel packaging is not required.

For General Purpose Amplifier Applications:

The LM224ADT, LM2902AWYDT, LM324ADR2G, and LM324AWDT are suitable only when J-FET input bias current characteristics (2 pA) are not critical to circuit performance. These parts feature input bias currents of 20-40 nanoamperes, approximately 10,000 times higher than the TL034AID. All maintain 4-circuit configuration in 14-SOIC packages and are Active status. The LM2902AWYDT includes automotive qualification (AEC-Q100) and extended temperature range to 125°C.

For Ultra-Low Input Bias Current Applications:

The LT1465CS#PBF from Analog Devices Inc. offers exceptional input bias current of 0.5 pA, superior to the TL034AID's 2 pA specification. This part maintains J-FET amplifier type, 4-circuit configuration, and identical supply voltage range (10V to 30V). Operating temperature range matches the TL034AID (-40°C to 85°C). Supply current is significantly lower (145µA vs. 870µA), beneficial for battery-powered applications. Active product status ensures long-term availability.

All recommended substitutes are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the original TL034AID.

Frequently Asked Questions (FAQ)

Q: Can the TL034AIDR be used as a direct replacement for the TL034AID?

A: Yes. The TL034AIDR is electrically identical to the TL034AID. The only difference is packaging format: TL034AIDR uses Tape & Reel packaging while TL034AID uses Tube packaging. Both are 14-SOIC surface mount packages with identical pin configurations. No circuit modifications are required. TL034AIDR is Active status with higher inventory availability.

Q: What is the key difference between J-FET and General Purpose amplifiers in this list?

A: J-FET amplifiers (TL034AID, LF247DT, LF347D, LF347DT, LT1465CS#PBF) feature input bias currents in the picoampere range (0.5-20 pA), making them suitable for high-impedance input applications. General Purpose amplifiers (LM224ADT, LM248DT, LM2902AWYDT, LM324ADR2G, LM324AWDT) feature input bias currents in the nanoampere range (20-40 nA), approximately 10,000 times higher. Selection depends on whether low input bias current is required for the application.

Q: Why does the LF247DT have a fixed supply voltage of 44V instead of a range?

A: The LF247DT specification indicates a fixed supply voltage span of 44V, which differs from the TL034AID's 10V to 30V range. This specification must be verified against application requirements before substitution. The LF247DT is suitable only for applications where 44V supply voltage is compatible with circuit design.

Q: Is the LT1465CS#PBF a better choice than the TL034AID?

A: The LT1465CS#PBF offers superior input bias current (0.5 pA vs. 2 pA) and significantly lower supply current (145µA vs. 870µA). However, it features lower slew rate (0.9V/µs vs. 5.1V/µs) and lower gain bandwidth product (1 MHz vs. 1.1 MHz). Selection depends on whether ultra-low input bias current and low power consumption are more critical than slew rate performance for the specific application.

Q: Can I use LM324ADR2G in place of TL034AID?

A: The LM324ADR2G is a General Purpose amplifier with input bias current of 40 nanoamperes, compared to the TL034AID's 2 picoamperes. This 20,000-fold difference in input bias current makes it unsuitable for applications requiring J-FET input characteristics. The LM324ADR2G is suitable only for applications where high input impedance is not required and where the broader supply voltage range (3V to 32V) is beneficial.

Q: What is the operating temperature difference between substitute parts?

A: The TL034AID operates from -40°C to 85°C. The LF247DT extends to 105°C. The LF347D and LF347DT operate from 0°C to 70°C, which does not cover the full -40°C lower temperature range of the TL034AID. The LM2902AWYDT extends to 125°C. The LT1465CS#PBF matches the TL034AID range (-40°C to 85°C). Application temperature requirements must be verified before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the original TL034AID specification.

Q: What is the significance of "Last Time Buy" status for the TL034AID?

A: Last Time Buy status indicates that the TL034AID is discontinued and no longer in production. Current inventory (653 pcs) represents the final available stock. Once depleted, the part will no longer be available. Substitution planning is necessary for long-term design continuity. The TL034AIDR (Active status) is the recommended alternative for continued supply.

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