TL034ID Equivalent & Substitute Parts Reference

Part Overview

The TL034ID is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a 4-circuit integrated circuit in 14-SOIC surface mount packaging. This device is classified as Last Time Buy, indicating discontinued production status. The TL034ID operates across a supply voltage range of 10V to 30V with an operating temperature range of -40°C to 85°C, making it suitable for precision analog signal conditioning applications requiring low input bias current characteristics.

Identification of equivalent and substitute parts is necessary due to the Last Time Buy status of the TL034ID. 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	790	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	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TL034ID is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

Amplifier Type: J-FET input configuration
Number of Circuits: 4 independent amplifier circuits
Package / Case: 14-SOIC surface mount form factor
Mounting Type: Surface Mount
Current - Output / Channel: 40 mA minimum
Voltage - Supply Span: Minimum 10V to maximum 30V overlap required

Secondary Compatibility Factors:

Slew Rate: 5.1 V/µs or greater
Gain Bandwidth Product: 1.1 MHz or greater
Current - Input Bias: 2 pA to 20 pA range
Voltage - Input Offset: 790 µV to 3 mV range
Operating Temperature: -40°C minimum to 85°C maximum overlap
RoHS3 Compliance and MSL Level 1 certification

Substitutes are grouped into two categories: Direct Equivalents (identical amplifier type and electrical performance) and Compatible Alternatives (different amplifier type but meeting mechanical and functional requirements).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA/nA)	Input Offset (µV/mV)	Supply Span (V)	Temp Range (°C)	Package	Product Status
TL034ID	Texas Instruments	J-FET	5.1	1.1	2 pA	790 µV	10–30	-40 to 85	14-SOIC	Last Time Buy
TL034IDR	Texas Instruments	J-FET	5.1	1.1	2 pA	790 µV	10–30	-40 to 85	14-SOIC	Active
LF247DT	STMicroelectronics	J-FET	16	4	20 pA	3 mV	44	-40 to 105	14-SOIC	Active
LF347D	STMicroelectronics	J-FET	16	3	20 pA	3 mV	44	0 to 70	14-SOIC	Active
LF347DT	STMicroelectronics	J-FET	16	4	20 pA	3 mV	44	0 to 70	14-SOIC	Active
LM124DT	STMicroelectronics	General Purpose	0.4	1.3	20 nA	2 mV	3–30	-55 to 125	14-SOIC	Active
LM224ADT	STMicroelectronics	General Purpose	0.4	1.3	20 nA	2 mV	3–30	-40 to 105	14-SOIC	Active
LM224D	STMicroelectronics	General Purpose	0.4	1.2	20 nA	2 mV	3–30	-40 to 105	14-SOIC	Active
LM224DR2G	onsemi	General Purpose	—	1	90 nA	2 mV	3–32	-25 to 85	14-SOIC	Active
LM224DT	STMicroelectronics	General Purpose	0.4	1.3	20 nA	2 mV	3–30	-40 to 105	14-SOIC	Active
LM248DT	STMicroelectronics	General Purpose	0.5	1.3	30 nA	1 mV	44	-40 to 105	14-SOIC	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The TL034IDR manufactured by Texas Instruments is the direct functional equivalent of the TL034ID. This part maintains identical electrical specifications including J-FET amplifier type, 5.1 V/µs slew rate, 1.1 MHz gain bandwidth product, 2 pA input bias current, and 790 µV input offset voltage. The TL034IDR operates within the same 10V to 30V supply range and -40°C to 85°C temperature window. The primary distinction is packaging format: TL034IDR is supplied in Cut Tape (CT) & Digi-Reel® format versus the Tube packaging of TL034ID. Both devices are ROHS3 compliant with MSL Level 1 certification. The TL034IDR carries Active product status with significantly higher inventory availability (19,487 units), ensuring supply continuity.

J-FET Alternative Substitutes:

The LF247DT and LF347DT/LF347D series from STMicroelectronics provide J-FET input amplifier configurations in 14-SOIC packaging. These devices feature enhanced performance characteristics: 16 V/µs slew rate and 3–4 MHz gain bandwidth product compared to the TL034ID baseline. Input bias current increases to 20 pA and input offset voltage to 3 mV. The LF series operates at 44V fixed supply span with extended temperature range to 105°C. These substitutes are suitable for applications where improved slew rate and bandwidth are beneficial and where the higher input offset voltage is acceptable.

General Purpose Amplifier Alternatives:

The LM224 series (LM224ADT, LM224D, LM224DT, LM224DR2G) and LM124DT from STMicroelectronics and onsemi provide general-purpose 4-circuit amplifier configurations in 14-SOIC packaging. These devices feature lower slew rate (0.4–0.5 V/µs) and comparable gain bandwidth product (1.0–1.3 MHz). Input bias current is significantly higher at 20–90 nA, and input offset voltage ranges from 1–2 mV. Supply voltage range extends to 3V minimum, providing broader compatibility. Operating temperature ranges extend to -55°C to 125°C (LM124DT) or -40°C to 105°C (LM224 variants). These alternatives are applicable where J-FET input characteristics are not critical and where general-purpose amplifier performance meets application requirements.

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 certification. Selection should be based on specific application requirements for input bias current, slew rate, and operating temperature range.

Frequently Asked Questions (FAQ)

Q1: Can the TL034IDR directly replace the TL034ID in existing designs?

A: Yes. The TL034IDR is electrically and functionally identical to the TL034ID. Both devices share identical electrical specifications, operating ranges, and 14-SOIC package dimensions. The only difference is packaging format: TL034IDR uses Cut Tape & Digi-Reel® format while TL034ID uses Tube format. PCB footprints and electrical performance are identical.

Q2: What are the key differences between J-FET and General Purpose amplifier substitutes?

A: J-FET input amplifiers (TL034ID, LF247DT, LF347DT) feature extremely low input bias current (2–20 pA range), making them suitable for high-impedance signal sources and precision measurement applications. General Purpose amplifiers (LM224, LM124) have higher input bias current (20–90 nA range) but offer broader supply voltage ranges (3V minimum) and extended temperature ratings. Selection depends on whether low input bias current is a design requirement.

Q3: Are the LF247DT and LF347DT suitable replacements for the TL034ID?

A: The LF247DT and LF347DT are compatible substitutes for mechanical and functional purposes. Both are J-FET 4-circuit amplifiers in 14-SOIC packaging. However, they exhibit different electrical characteristics: higher slew rate (16 V/µs vs. 5.1 V/µs), higher gain bandwidth product (3–4 MHz vs. 1.1 MHz), higher input bias current (20 pA vs. 2 pA), and higher input offset voltage (3 mV vs. 790 µV). These differences may affect circuit performance in precision applications. Verify that application tolerances accommodate these parameter variations before substitution.

Q4: Can General Purpose amplifiers like LM224 replace the TL034ID?

A: General Purpose amplifiers can replace the TL034ID mechanically and functionally in applications where J-FET input characteristics are not critical. However, significant electrical differences exist: input bias current increases from 2 pA to 20–90 nA, slew rate decreases from 5.1 V/µs to 0.4–0.5 V/µs, and input offset voltage increases from 790 µV to 1–2 mV. These substitutes are suitable for general signal conditioning but not for high-impedance or precision measurement applications where low input bias current is essential.

Q5: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package is a surface mount form factor with 0.154-inch (3.90mm) width. All listed substitutes maintain this identical package specification, ensuring PCB footprint compatibility. Pin count, spacing, and soldering requirements remain consistent across all recommended alternatives. Packaging format differences (Tube, Cut Tape, Tape & Reel) affect supply and handling but not electrical or mechanical compatibility.

Q6: How do supply voltage ranges affect substitution decisions?

A: The TL034ID operates within 10V to 30V supply span. The TL034IDR maintains this identical range. The LF247DT and LF347DT operate at fixed 44V supply span, requiring different power supply design. General Purpose amplifiers (LM224, LM124) support 3V to 30V range, providing broader flexibility for low-voltage applications. Verify that the substitute's supply voltage range encompasses your circuit's operating requirements before selection.

Q7: What is the importance of RoHS3 compliance and MSL Level 1 certification?

A: RoHS3 compliance indicates the device contains no restricted hazardous substances, meeting environmental and regulatory requirements for commercial and industrial applications. MSL Level 1 (Unlimited) certification indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All recommended substitutes maintain both certifications, ensuring regulatory compliance and simplified supply chain management.

Q8: How does operating temperature range affect part selection?

A: The TL034ID operates from -40°C to 85°C. The TL034IDR maintains this identical range. The LF247DT extends to 105°C, suitable for higher-temperature environments. The LF347D/LF347DT operate from 0°C to 70°C, limiting low-temperature performance. General Purpose amplifiers offer extended ranges: LM124DT (-55°C to 125°C) and LM224 variants (-40°C to 105°C). Select substitutes whose temperature range encompasses your application's operating environment.

Q9: What inventory considerations should influence substitute selection?

A: The TL034ID (Last Time Buy status) has 1,924 units available. The TL034IDR (Active status) has 19,487 units, providing superior long-term supply security. The LF347DT has 27,321 units, and LM224DR2G has 105,200 units. For applications requiring long-term component availability, prioritize Active status parts with higher inventory levels. Last Time Buy status indicates production discontinuation; inventory depletion will occur.

Q10: Are there any certifications or compliance differences between substitutes?

A: All recommended substitutes maintain ROHS3 compliance and MSL Level 1 certification, matching the TL034ID baseline. REACH Status is "REACH Unaffected" for all parts, indicating no regulatory restrictions. ECCN classification (EAR99) and HTSUS code (8542.33.0001) are identical across all substitutes. No compliance or certification barriers exist for substitution.

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