LMC6042AIM Equivalent & Substitute Parts

Part Overview

The LMC6042AIM 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 with low input bias current and is designed for general-purpose analog signal processing applications. The LMC6042AIM is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility across electrical performance parameters, package form factor, and supply voltage specifications to ensure direct circuit board replacement without redesign.

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 (per channel)	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	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LMC6042AIM are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are: dual-channel configuration (2 circuits), 8-SOIC package form factor, rail-to-rail output capability, CMOS amplifier type, and supply voltage range spanning 4.5 V to 15.5 V minimum. Parts are classified into two categories:

Category 1: Direct Packaging Equivalents — Parts maintaining identical electrical specifications and packaging. These include LMC6042AIM/NOPB (Tube packaging variant) and LMC6042AIMX/NOPB (Tape & Reel variant), which are packaging derivatives of the base LMC6042 series with no electrical parameter deviation.

Category 2: Functional Substitutes with Enhanced Performance — Parts that maintain the dual-channel, 8-SOIC configuration and rail-to-rail output but offer improved electrical characteristics. These include AD8662ARZ, AD8662ARZ-REEL, AD8662ARZ-REEL7 (Analog Devices DigiTrim® series with higher slew rate and gain bandwidth product), and AD8667ARZ, AD8667ARZ-REEL, AD8667ARZ-REEL7 (Analog Devices DigiTrim® series general-purpose amplifiers).

Category 3: Single-Channel Alternative — LMC6041AIMX/NOPB represents a single-circuit variant suitable only for applications requiring one amplifier channel, with reduced supply current.

Category 4: Low-Power General-Purpose Alternative — OP281GSZ and OP281GSZ-REEL7 provide dual-channel, rail-to-rail operation with significantly lower supply current but reduced output current capability and narrower supply voltage range (2.7 V to 12 V).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Output Type	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (mV/µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
LMC6042AIM	Texas Instruments	CMOS	2	Push-Pull, Rail-to-Rail	0.02	100	0.002	1	26	40	4.5	15.5	-40 to 85	8-SOIC	Obsolete
LMC6042AIM/NOPB	Texas Instruments	CMOS	2	Push-Pull, Rail-to-Rail	0.02	100	0.002	1	26	40	4.5	15.5	-40 to 85	8-SOIC	Last Time Buy
LMC6041AIMX/NOPB	Texas Instruments	General Purpose	1	Rail-to-Rail	0.02	75	0.002	1	18	—	4.5	15.5	-40 to 85	8-SOIC	Active
AD8662ARZ	Analog Devices	CMOS	2	Rail-to-Rail	3.5	4000	0.3	0.05	1250	140	5	16	-40 to 125	8-SOIC	Active
AD8662ARZ-REEL	Analog Devices	CMOS	2	Rail-to-Rail	3.5	4000	0.3	0.05	1250	140	5	16	-40 to 125	8-SOIC	Active
AD8662ARZ-REEL7	Analog Devices	CMOS	2	Rail-to-Rail	3.5	4000	0.3	0.05	1250	140	5	16	-40 to 125	8-SOIC	Active
AD8667ARZ	Analog Devices	General Purpose	2	Rail-to-Rail	0.3	540	0.3	0.04	230	50	5	16	-40 to 125	8-SOIC	Active
AD8667ARZ-REEL	Analog Devices	General Purpose	2	Rail-to-Rail	0.3	540	0.3	0.04	230	50	5	16	-40 to 125	8-SOIC	Active
AD8667ARZ-REEL7	Analog Devices	General Purpose	2	Rail-to-Rail	0.3	540	0.3	0.04	230	50	5	16	-40 to 125	8-SOIC	Active
OP281GSZ	Analog Devices	General Purpose	2	Rail-to-Rail	0.028	105	3	0.1	3.3	12	2.7	12	-40 to 85	8-SOIC	Active
OP281GSZ-REEL7	Analog Devices	General Purpose	2	Rail-to-Rail	0.028	105	3	0.1	3.3	12	2.7	12	-40 to 85	8-SOIC	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

LMC6042AIM/NOPB is the primary direct substitute, offering identical electrical specifications with Last Time Buy product status from Texas Instruments. This part maintains all performance parameters including 0.02 V/µs slew rate, 100 kHz gain bandwidth product, and 4.5 V to 15.5 V supply range. Packaging differs only in delivery format (Tube vs. standard). Both parts are ROHS3 compliant with MSL 1 rating.

For Active Production with Enhanced Performance:

AD8662ARZ, AD8662ARZ-REEL, and AD8662ARZ-REEL7 provide dual-channel CMOS amplification with significantly improved electrical characteristics: 3.5 V/µs slew rate (175× faster), 4 MHz gain bandwidth product (40× higher), and 140 mA output current per channel (3.5× higher). These parts maintain 8-SOIC packaging and rail-to-rail output. Supply voltage range is 5 V to 16 V (minimum 0.5 V higher than LMC6042AIM). Operating temperature extends to 125°C. All variants are ROHS3 compliant and Active status. Packaging variants (Tube, Tape & Reel, Cut Tape & Digi-Reel) accommodate different procurement workflows.

For General-Purpose Applications with Lower Power Consumption:

AD8667ARZ, AD8667ARZ-REEL, and AD8667ARZ-REEL7 maintain dual-channel configuration and 8-SOIC package with improved slew rate (0.3 V/µs, 15× faster) and gain bandwidth product (540 kHz, 5.4× higher). Supply current is 230 µA per channel (8.8× higher than LMC6042AIM). Output current is 50 mA per channel (1.25× higher). Supply range is 5 V to 16 V. All variants are Active status, ROHS3 compliant, and support extended temperature range to 125°C.

For Ultra-Low Power Applications:

OP281GSZ and OP281GSZ-REEL7 deliver the lowest supply current at 3.3 µA per channel (12.3% of LMC6042AIM consumption). Dual-channel, rail-to-rail configuration is maintained in 8-SOIC package. Trade-offs include reduced output current (12 mA vs. 40 mA), narrower supply range (2.7 V to 12 V), and lower slew rate (0.028 V/µs). Operating temperature range matches LMC6042AIM (-40°C to 85°C). Both variants are Active status and ROHS3 compliant.

For Single-Channel Requirements:

LMC6041AIMX/NOPB is suitable only when single amplifier channel is required. This part reduces supply current to 18 µA and maintains identical slew rate (0.02 V/µs) and input bias current (0.002 pA). Gain bandwidth product is 75 kHz (25% lower). Supply range and package remain compatible. Active product status from Texas Instruments.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and 8-SOIC surface mount package form factor. Selection should prioritize product status (Active preferred over Obsolete or Last Time Buy) and supply voltage compatibility with existing circuit design.

Frequently Asked Questions (FAQ)

Q1: Can LMC6042AIM/NOPB be used as a direct drop-in replacement for LMC6042AIM?

A: Yes. LMC6042AIM/NOPB is electrically identical to LMC6042AIM, differing only in packaging format (Tube delivery). Both maintain 0.02 V/µs slew rate, 100 kHz gain bandwidth product, 4.5 V to 15.5 V supply range, and 8-SOIC form factor. The part is classified as Last Time Buy, indicating limited future availability.

Q2: What are the key differences between AD8662ARZ and the original LMC6042AIM?

A: AD8662ARZ maintains dual-channel CMOS amplification and 8-SOIC packaging but offers enhanced performance: 3.5 V/µs slew rate (vs. 0.02 V/µs), 4 MHz gain bandwidth product (vs. 100 kHz), and 140 mA output current per channel (vs. 40 mA). Supply voltage minimum is 5 V (vs. 4.5 V). Operating temperature extends to 125°C. AD8662ARZ is Active status with higher inventory availability.

Q3: Is OP281GSZ suitable for high-current output applications?

A: No. OP281GSZ provides only 12 mA output current per channel, compared to 40 mA for LMC6042AIM. This part is optimized for ultra-low power consumption (3.3 µA per channel) and is suitable only for low-current signal processing. Supply voltage range is also narrower (2.7 V to 12 V vs. 4.5 V to 15.5 V).

Q4: Can LMC6041AIMX/NOPB replace LMC6042AIM in dual-channel applications?

A: No. LMC6041AIMX/NOPB is a single-channel device and cannot provide dual amplification. It is suitable only for applications requiring one operational amplifier. For dual-channel requirements, use LMC6042AIM/NOPB, AD8662ARZ variants, or AD8667ARZ variants.

Q5: What is the minimum supply voltage for AD8662ARZ and AD8667ARZ?

A: Both AD8662ARZ and AD8667ARZ require minimum 5 V supply, compared to 4.5 V for LMC6042AIM. Circuits designed for 4.5 V operation must be verified for compatibility with these substitutes. The maximum supply voltage for both is 16 V, which is compatible with LMC6042AIM's 15.5 V maximum.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts—LMC6042AIM/NOPB, LMC6041AIMX/NOPB, AD8662ARZ variants, AD8667ARZ variants, and OP281GSZ variants—are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All are suitable for lead-free soldering processes.

Q7: Which substitute offers the best balance of performance and availability?

A: AD8662ARZ-REEL7 provides optimal balance: dual-channel CMOS amplification, 8-SOIC package, significantly improved performance (3.5 V/µs slew rate, 4 MHz gain bandwidth product), Active product status, and highest inventory (12,200 units). Supply voltage range (5 V to 16 V) is compatible with most applications. Packaging format (Cut Tape & Digi-Reel) supports both manual and automated assembly.

Q8: What is the temperature operating range difference between LMC6042AIM and AD8662ARZ?

A: LMC6042AIM operates from -40°C to 85°C. AD8662ARZ extends to -40°C to 125°C, providing 40°C additional high-temperature capability. This makes AD8662ARZ suitable for industrial and automotive applications requiring extended temperature performance.

Q9: How does input bias current compare across substitutes?

A: LMC6042AIM has 0.002 pA input bias current. AD8662ARZ and AD8667ARZ both have 0.3 pA (150× higher). OP281GSZ has 3 nA (1.5 million× higher). For applications sensitive to input bias current, LMC6042AIM and LMC6041AIMX/NOPB maintain superior performance. For general-purpose applications, the higher bias current of AD8662ARZ and AD8667ARZ is typically acceptable.

Q10: Are packaging variants (Tube, Tape & Reel, Cut Tape & Digi-Reel) electrically equivalent?

A: Yes. Packaging variants of the same base part number (e.g., AD8662ARZ, AD8662ARZ-REEL, AD8662ARZ-REEL7) are electrically identical. Differences are delivery format only: Tube for manual handling, Tape & Reel for automated pick-and-place, and Cut Tape & Digi-Reel for mixed-volume production. Selection depends on assembly process requirements, not electrical performance.

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