LMC6042IMX Equivalent & Substitute Parts

Part Overview

The LMC6042IMX is a CMOS dual-channel operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device features push-pull, rail-to-rail output configuration and is designed for low-power analog signal processing applications. The LMC6042IMX is classified as obsolete product status, necessitating identification of active equivalent and substitute components for new designs and production continuity. Substitute parts must maintain functional compatibility across key electrical parameters including supply voltage range, output drive capability, and thermal operating range while accommodating packaging and compliance requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Output Type	Push-Pull, Rail-to-Rail	—
Slew Rate	0.02	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	0.002	pA
Voltage - Input Offset	1	mV
Current - Supply (x2 Channels)	26	µA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LMC6042IMX is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

Package compatibility: 8-SOIC form factor (0.154", 3.90mm Width)
Dual-channel configuration (2 circuits)
Rail-to-rail output capability
Supply voltage range overlap: minimum 4.5 V to 5 V; maximum 15.5 V to 16 V
Output current per channel: minimum 40 mA
Surface mount technology

Secondary Compatibility Factors:

Input bias current: 0.002 pA to 0.3 pA range acceptable
Input offset voltage: 1 mV to 50 µV range acceptable
Operating temperature: -40°C minimum; 85°C to 125°C maximum acceptable
RoHS compliance status and MSL rating

Substitutes are grouped into two categories: Direct Functional Equivalents (identical electrical performance) and Enhanced Performance Alternatives (superior specifications within compatible parameter ranges).

Parameter Comparison

Parameter	LMC6042IMX	LMC6042IMX/NOPB	AD8662ARZ	AD8662ARZ-REEL	AD8662ARZ-REEL7	AD8667ARZ	AD8667ARZ-REEL	AD8667ARZ-REEL7
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose
Number of Circuits	2	2	2	2	2	2	2	2
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.02	0.02	3.5	3.5	3.5	0.3	0.3	0.3
Gain Bandwidth Product (kHz)	100	100	4000	4000	4000	540	540	540
Current - Input Bias (pA)	0.002	0.002	0.3	0.3	0.3	0.3	0.3	0.3
Voltage - Input Offset (mV)	1	1	0.05	0.05	0.05	0.04	0.04	0.04
Current - Supply (µA, x2 Channels)	26	26	1250	1250	1250	230	230	230
Current - Output / Channel (mA)	40	40	140	140	140	50	50	50
Voltage - Supply Span Min (V)	4.5	4.5	5	5	5	5	5	5
Voltage - Supply Span Max (V)	15.5	15.5	16	16	16	16	16	16
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	—	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Direct Equivalent Substitution:

LMC6042IMX/NOPB is the direct functional equivalent of LMC6042IMX. Both devices share identical electrical specifications including slew rate (0.02 V/µs), gain bandwidth product (100 kHz), input bias current (0.002 pA), and output current per channel (40 mA). The primary distinction is product status and compliance: LMC6042IMX/NOPB is active and ROHS3 compliant, whereas the original LMC6042IMX is obsolete and RoHS non-compliant. For new designs and production continuity, LMC6042IMX/NOPB is the preferred direct replacement. Packaging options include Tape & Reel (TR) format with 1789 units in stock.

Enhanced Performance Alternatives:

AD8662ARZ, AD8662ARZ-REEL, and AD8662ARZ-REEL7 (Analog Devices Inc., DigiTrim® series) provide enhanced performance within compatible parameter ranges. These CMOS dual-channel amplifiers maintain rail-to-rail output and 8-SOIC packaging. Key improvements include slew rate of 3.5 V/µs (175× faster), gain bandwidth product of 4 MHz (40× higher), and output current per channel of 140 mA (3.5× greater). Supply voltage range (5 V to 16 V) overlaps the original specification. Operating temperature extends to 125°C. These devices are ROHS3 compliant and available in multiple packaging formats with substantial inventory (3900 to 12200 units).

AD8667ARZ, AD8667ARZ-REEL, and AD8667ARZ-REEL7 (Analog Devices Inc., DigiTrim® series) are general-purpose dual-channel amplifiers with rail-to-rail output in 8-SOIC packaging. These devices offer intermediate performance characteristics: slew rate of 0.3 V/µs (15× faster than original), gain bandwidth product of 540 kHz (5.4× higher), and output current per channel of 50 mA (1.25× greater). Supply voltage range (5 V to 16 V) and operating temperature (-40°C to 125°C) are compatible. ROHS3 compliance and multiple packaging options are available with high inventory levels (2180 to 14816 units).

Selection Criteria by Application:

Direct replacement for existing designs: LMC6042IMX/NOPB
High-speed signal processing requiring enhanced bandwidth: AD8662ARZ series
Moderate bandwidth applications with improved performance: AD8667ARZ series
RoHS compliance requirement: All Analog Devices alternatives (AD8662, AD8667 series)
Extended temperature range (-40°C to 125°C): All Analog Devices alternatives

All substitute parts maintain 8-SOIC surface mount packaging, dual-channel configuration, and rail-to-rail output capability. Supply voltage compatibility is confirmed across all alternatives within the specified ranges.

Frequently Asked Questions (FAQ)

Q1: Can LMC6042IMX/NOPB be used as a direct replacement for LMC6042IMX?

A: Yes. LMC6042IMX/NOPB is the direct functional equivalent with identical electrical specifications. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Electrical performance, package type (8-SOIC), and pin configuration are identical. LMC6042IMX/NOPB is the recommended replacement for production continuity.

Q2: What are the key differences between AD8662ARZ and AD8667ARZ?

A: Both are dual-channel, rail-to-rail amplifiers in 8-SOIC packaging from Analog Devices Inc. AD8662ARZ is classified as CMOS with slew rate 3.5 V/µs and gain bandwidth product 4 MHz, optimized for high-speed applications. AD8667ARZ is classified as general-purpose with slew rate 0.3 V/µs and gain bandwidth product 540 kHz, suitable for moderate-bandwidth applications. AD8662ARZ provides 40× higher bandwidth; AD8667ARZ provides lower power consumption (230 µA vs. 1250 µA supply current). Both are ROHS3 compliant and operate from -40°C to 125°C.

Q3: Are the AD8662 and AD8667 series pin-compatible with LMC6042IMX?

A: Yes. All substitute parts use 8-SOIC packaging with identical pinout configuration. Surface mount assembly equipment and PCB layouts designed for LMC6042IMX are compatible with AD8662ARZ and AD8667ARZ series without modification.

Q4: What is the supply voltage compatibility range for substitutes?

A: LMC6042IMX operates from 4.5 V to 15.5 V. LMC6042IMX/NOPB maintains this range (4.5 V to 15.5 V). AD8662ARZ and AD8667ARZ series operate from 5 V to 16 V. For applications requiring 4.5 V minimum supply, only LMC6042IMX/NOPB is suitable. For 5 V to 15.5 V range, all alternatives are compatible.

Q5: Which substitute offers the best performance improvement?

A: AD8662ARZ series provides the most significant performance enhancement: slew rate increases from 0.02 V/µs to 3.5 V/µs (175× improvement), gain bandwidth product increases from 100 kHz to 4 MHz (40× improvement), and output current per channel increases from 40 mA to 140 mA (3.5× improvement). This makes AD8662ARZ optimal for high-speed signal processing applications.

Q6: What packaging options are available for each substitute?

A: LMC6042IMX/NOPB is available in Tape & Reel (TR) format. AD8662ARZ is available in Tube packaging; AD8662ARZ-REEL in Tape & Reel (TR); AD8662ARZ-REEL7 in Cut Tape (CT) & Digi-Reel®. AD8667ARZ is available in Tube packaging; AD8667ARZ-REEL and AD8667ARZ-REEL7 in Cut Tape (CT) & Digi-Reel®. Selection depends on assembly process requirements and volume.

Q7: Are all substitutes RoHS compliant?

A: LMC6042IMX is RoHS non-compliant. LMC6042IMX/NOPB and all Analog Devices alternatives (AD8662ARZ, AD8667ARZ series) are ROHS3 compliant. For applications requiring RoHS compliance, use LMC6042IMX/NOPB or Analog Devices alternatives.

Q8: What is the operating temperature range for each part?

A: LMC6042IMX and LMC6042IMX/NOPB operate from -40°C to 85°C. AD8662ARZ and AD8667ARZ series extend the maximum operating temperature to 125°C. For applications requiring operation above 85°C, Analog Devices alternatives are required.

Q9: How do input offset voltage specifications compare?

A: LMC6042IMX has input offset voltage of 1 mV. LMC6042IMX/NOPB maintains 1 mV. AD8662ARZ series reduces this to 50 µV (20× improvement). AD8667ARZ series achieves 40 µV (25× improvement). Lower input offset voltage improves precision in signal conditioning and measurement applications.

Q10: What inventory levels are available?

A: LMC6042IMX (obsolete): 5977 units. LMC6042IMX/NOPB (active): 1789 units. AD8662ARZ: 2722 units. AD8662ARZ-REEL: 3900 units. AD8662ARZ-REEL7: 12200 units. AD8667ARZ: 14816 units. AD8667ARZ-REEL: 2180 units. AD8667ARZ-REEL7: 3400 units. Highest availability is AD8667ARZ with 14816 units in stock.

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