TL034IDRG4 Equivalent & Substitute Parts

Part Overview

The TL034IDRG4 is a J-FET operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SOIC surface mount package. This component is classified as obsolete, though 863 pieces remain available in new original stock. The TL034IDRG4 is designed for applications requiring low input bias current and low input offset voltage characteristics inherent to J-FET amplifier topology.

Due to the obsolete product status of the TL034IDRG4, identification of equivalent and substitute parts is necessary for design continuity, production planning, and long-term component availability assurance. Active alternatives with comparable or enhanced electrical performance are available from multiple manufacturers.

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 Range	-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 TL034IDRG4 is determined by alignment across the following critical parameters: amplifier type (J-FET topology), number of circuits (4-circuit configuration), package format (14-SOIC surface mount), and electrical performance specifications (slew rate, gain bandwidth product, input bias current, input offset voltage, supply voltage range, and output current capability).

The substitute parts are grouped into two categories:

Category 1: Direct Equivalent (Active Status) The TL034IDR represents the active production equivalent of the TL034IDRG4. This part maintains identical electrical specifications and J-FET amplifier topology, differing only in packaging format (Cut Tape & Digi-Reel versus the original Digi-Reel configuration). The TL034IDR is manufactured by Texas Instruments and carries active product status with significantly higher inventory availability (19,487 pieces).

Category 2: Enhanced Performance Alternatives (J-FET Topology) The LF247DT and LF347D/LF347DT parts are STMicroelectronics J-FET amplifiers offering enhanced electrical performance compared to the TL034IDRG4. These alternatives provide higher slew rate (16 V/µs versus 5.1 V/µs), increased gain bandwidth product (3-4 MHz versus 1.1 MHz), and extended supply voltage range (44 V symmetric). These parts are suitable for applications where improved frequency response and slew rate performance are beneficial.

Category 3: General Purpose Alternatives (Broadened Compatibility) The LM124DT, LM224ADT, LM224D, LM224DR2G, LM224DT, and LM2902AS14-13 parts represent general purpose operational amplifiers with 4-circuit configurations in 14-SOIC packages. These alternatives sacrifice the J-FET input stage characteristics (lower input bias current and offset voltage) in exchange for broader supply voltage compatibility and extended temperature ranges. These parts are applicable only when J-FET input characteristics are not required by the circuit design.

Parameter Comparison

Parameter	TL034IDRG4	TL034IDR	LF247DT	LF347DT	LM224DT	LM2902AS14-13
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	Diodes Incorporated
Product Status	Obsolete	Active	Active	Active	Active	Active
Amplifier Type	J-FET	J-FET	J-FET	J-FET	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4
Slew Rate (V/µs)	5.1	5.1	16	16	0.4	0.3
Gain Bandwidth Product (MHz)	1.1	1.1	4	4	1.3	0.7
Current - Input Bias (pA/nA)	2 pA	2 pA	20 pA	20 pA	20 nA	20 nA
Voltage - Input Offset (µV/mV)	790 µV	790 µV	3 mV	3 mV	2 mV	1 mV
Current - Supply (µA/mA)	870 µA	870 µA	1.4 mA	1.4 mA	1.5 mA	700 µA
Current - Output / Channel (mA)	40	40	40	40	40	40
Voltage - Supply Span (Min)	10 V	10 V	44 V	44 V	3 V	3 V
Voltage - Supply Span (Max)	30 V	30 V	44 V	44 V	30 V	36 V
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 105	0 to 70	-40 to 105	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
Inventory Availability	863 Pcs	19,487 Pcs	17,352 Pcs	27,321 Pcs	35,200 Pcs	6,280 Pcs

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Option)

The TL034IDR is the recommended primary substitute for the TL034IDRG4. This part is manufactured by Texas Instruments, maintains identical electrical specifications and J-FET amplifier topology, and carries active product status. The TL034IDR provides superior long-term availability (19,487 pieces in stock) compared to the obsolete TL034IDRG4 (863 pieces). Both parts are ROHS3 compliant with MSL 1 rating and identical supply voltage requirements (10-30 V). The TL034IDR is suitable for direct pin-for-pin replacement in existing designs without circuit modification.

For Enhanced Performance Applications

The LF247DT and LF347DT are suitable substitutes when circuit design permits utilization of enhanced electrical performance. These STMicroelectronics J-FET amplifiers provide 3.1× higher slew rate (16 V/µs versus 5.1 V/µs) and 3.6× higher gain bandwidth product (4 MHz versus 1.1 MHz). The LF347DT offers the highest inventory availability (27,321 pieces). Both parts maintain J-FET input characteristics (20 pA input bias current) and 40 mA output current per channel. The LF347DT operating temperature range (0-70°C) is narrower than the TL034IDRG4 (-40-85°C), requiring verification for applications requiring extended low-temperature operation.

For General Purpose Applications (When J-FET Input Not Required)

The LM224DT and LM224ADT are suitable substitutes only when circuit design does not require J-FET input stage characteristics. These general purpose amplifiers provide extended supply voltage range (3-30 V versus 10-30 V) and extended operating temperature range (-40-105°C). The LM224DT provides the highest inventory availability among general purpose alternatives (35,200 pieces). Input bias current is significantly higher (20 nA versus 2 pA), making these parts unsuitable for applications requiring ultra-low input bias current.

All recommended substitutes are ROHS3 compliant and carry active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the TL034IDR be used as a direct replacement for the TL034IDRG4?

A: Yes. The TL034IDR is the active production equivalent of the TL034IDRG4. Both parts are manufactured by Texas Instruments, share identical electrical specifications, J-FET amplifier topology, 4-circuit configuration, 14-SOIC package format, and supply voltage range (10-30 V). The TL034IDR differs only in packaging format (Cut Tape & Digi-Reel) and carries active product status with significantly higher inventory availability.

Q: What are the key differences between J-FET amplifiers (TL034IDR, LF247DT, LF347DT) and general purpose amplifiers (LM224DT, LM2902AS14-13)?

A: J-FET amplifiers feature extremely low input bias current (2-20 pA range) and are suitable for high-impedance input applications. General purpose amplifiers have higher input bias current (20 nA range) but offer broader supply voltage compatibility and extended temperature ranges. Selection depends on circuit requirements for input impedance and bias current characteristics.

Q: Are all substitute parts available in the same 14-SOIC package?

A: Yes. All substitute parts listed are available in 14-SOIC (0.154", 3.90mm width) surface mount package format, ensuring mechanical compatibility with existing PCB layouts. Packaging format variations (Cut Tape, Digi-Reel, Tube, Tape & Reel) affect procurement and handling but do not impact electrical performance or PCB mounting.

Q: What is the significance of the MSL (Moisture Sensitivity Level) rating?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. The LM2902AS14-13 carries MSL 3 (168 Hours), requiring moisture control measures and limiting shelf life to 168 hours after bag opening under specified humidity conditions. For applications with extended storage requirements, MSL 1 rated parts are preferred.

Q: Can the LF247DT or LF347DT be used in applications requiring -40°C operation?

A: The LF247DT supports -40°C operation (temperature range -40 to 105°C). The LF347DT does not support -40°C operation (temperature range 0 to 70°C). For applications requiring extended low-temperature operation to -40°C, the LF247DT is the appropriate J-FET alternative, or the TL034IDR should be retained.

Q: What inventory considerations apply to component selection?

A: The TL034IDRG4 (863 pieces) has limited remaining stock due to obsolete status. The TL034IDR (19,487 pieces) provides superior availability as the active equivalent. The LF347DT (27,321 pieces) and LM224DT (35,200 pieces) offer the highest inventory levels among all alternatives. For long-term production planning, active status parts with higher inventory levels are recommended.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (TL034IDR, LF247DT, LF347D, LF347DT, LM124DT, LM224ADT, LM224D, LM224DR2G, LM224DT, LM2902AS14-13) are ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

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