LMC6034IM CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The LMC6034IM is a CMOS amplifier integrated circuit containing four independent operational amplifier circuits in a 14-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. The LMC6034IM operates across a wide supply voltage range of 4.75V to 15.5V with ultra-low input bias current of 0.04 pA, making it suitable for high-impedance signal conditioning applications. Due to its obsolete status and non-compliance with current RoHS3 standards, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Slew Rate	1.1	V/µs
Gain Bandwidth Product	1.4	MHz
Current - Input Bias	0.04	pA
Voltage - Input Offset	1	mV
Current - Supply (x4 Channels)	1.5	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	4.75	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the LMC6034IM is determined by strict electrical and mechanical compatibility criteria. All substitute parts must satisfy the following mandatory parameters:

Electrical Compatibility Requirements:

Amplifier Type: CMOS
Number of Circuits: 4 independent operational amplifiers
Package / Case: 14-SOIC (0.154", 3.90mm Width) surface mount configuration
Mounting Type: Surface Mount

Functional Compatibility Parameters:

Supply voltage range must encompass or exceed the LMC6034IM operating range (4.75V to 15.5V minimum)
Output current per channel must be sufficient for the application (minimum 40 mA)
Input bias current and input offset voltage must be compatible with high-impedance signal conditioning requirements

The substitute parts identified are organized into two categories: direct packaging equivalents and performance-enhanced alternatives. Direct equivalents maintain identical electrical performance characteristics, while performance-enhanced alternatives provide superior specifications within the same package footprint and pin configuration.

Parameter Comparison

Parameter	LMC6034IM	LMC6034IM/NOPB	TS274ACDT	TS274AIDT	TS274CDT	TS274IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4
Slew Rate (V/µs)	1.1	1.1	5.5	5.5	5.5	5.5
Gain Bandwidth Product (MHz)	1.4	1.4	3.5	3.5	3.5	3.5
Current - Input Bias (pA)	0.04	0.04	1	1	1	1
Voltage - Input Offset (mV)	1	1	0.9	0.9	1.1	1.1
Current - Supply (mA)	1.5	1.5	1	1	1	1
Current - Output / Channel (mA)	40	40	45	45	45	45
Voltage - Supply Span Min (V)	4.75	4.75	3	3	3	3
Voltage - Supply Span Max (V)	15.5	15.5	16	16	16	16
Operating Temperature (°C)	-40 to 85	-40 to 85	0 to 70	-40 to 125	0 to 70	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Not For New Designs	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For Direct Replacement (Identical Performance):

The LMC6034IM/NOPB is the direct equivalent from Texas Instruments, maintaining identical electrical specifications including 1.1 V/µs slew rate, 1.4 MHz gain bandwidth product, and 0.04 pA input bias current. However, this part is classified as Obsolete and does not resolve the compliance issues of the original LMC6034IM. Selection of this part is appropriate only when legacy system maintenance requires exact performance matching and compliance requirements are not applicable.

For New Designs and Production (Recommended):

The STMicroelectronics TS274 series (TS274ACDT, TS274AIDT, TS274CDT, TS274IDT) represents the active product line alternative. All TS274 variants are ROHS3 compliant and REACH unaffected, eliminating regulatory compliance barriers. These parts provide enhanced performance specifications: 5.5 V/µs slew rate (5× improvement), 3.5 MHz gain bandwidth product (2.5× improvement), and 45 mA output current per channel (12.5% improvement over LMC6034IM).

Temperature Range Selection:

TS274ACDT and TS274CDT: Operating range 0°C to 70°C. Select for commercial temperature applications.
TS274AIDT and TS274IDT: Operating range -40°C to 125°C. Select for industrial and extended temperature applications requiring the full military-grade temperature span.

Packaging and Supply Chain Considerations:

TS274ACDT: Cut Tape (CT) packaging, 45,200 units in stock
TS274AIDT: Cut Tape (CT) & Digi-Reel® packaging, 2,098 units in stock
TS274CDT: Cut Tape (CT) & Digi-Reel® packaging, 30,100 units in stock
TS274IDT: Tape & Reel (TR) packaging, 10,534 units in stock

All substitute parts maintain the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can TS274 series parts directly replace LMC6034IM without PCB modifications?

A: Yes. All TS274 variants use the identical 14-SOIC (0.154", 3.90mm Width) surface mount package with the same pin configuration. No PCB layout changes are required. The parts are pin-for-pin compatible.

Q: What is the primary reason to substitute LMC6034IM with TS274 series?

A: The LMC6034IM is classified as "Not For New Designs" and is non-compliant with ROHS3 and REACH regulations. The TS274 series provides active product line alternatives that are fully compliant with current environmental and regulatory standards while offering superior electrical performance.

Q: Are there performance differences between TS274ACDT and TS274AIDT?

A: Both parts are electrically identical except for operating temperature range. TS274ACDT operates 0°C to 70°C (commercial grade), while TS274AIDT operates -40°C to 125°C (industrial/extended grade). Select based on application temperature requirements.

Q: What is the difference between TS274CDT and TS274IDT?

A: TS274CDT and TS274IDT differ in operating temperature range (0°C to 70°C versus -40°C to 125°C) and input offset voltage specification (1.1 mV versus 1.1 mV). Both are electrically equivalent. TS274IDT provides extended temperature coverage.

Q: Will the enhanced performance of TS274 (5.5 V/µs slew rate vs. 1.1 V/µs) cause circuit compatibility issues?

A: No. Higher slew rate is a performance enhancement that does not create compatibility issues. Circuits designed for LMC6034IM will function correctly with TS274 series. The improved slew rate may reduce settling time and improve transient response in signal conditioning applications.

Q: What supply voltage range is supported by TS274 series?

A: TS274 series supports 3V to 16V supply range, which encompasses and exceeds the LMC6034IM range of 4.75V to 15.5V. This provides additional design flexibility for lower voltage applications.

Q: Is the 0.04 pA input bias current of LMC6034IM critical for my application?

A: The TS274 series has 1 pA input bias current, which is 25× higher than LMC6034IM. For high-impedance signal conditioning applications (>1 GΩ source impedance), this difference may be significant. Verify that your circuit design can tolerate the higher input bias current before substitution.

Q: Which TS274 variant should I select for high-volume production?

A: TS274CDT offers the highest inventory (30,100 units) with Cut Tape & Digi-Reel® packaging options, providing optimal supply chain availability for high-volume manufacturing. TS274ACDT (45,200 units) is also suitable if commercial temperature range (0°C to 70°C) meets application requirements.

Q: Are all TS274 variants ROHS3 and REACH compliant?

A: Yes. All TS274ACDT, TS274AIDT, TS274CDT, and TS274IDT variants are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for both new designs and export applications.

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