LMC6064IM CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The LMC6064IM is a CMOS operational amplifier IC manufactured by Texas Instruments, featuring four independent rail-to-rail amplifier circuits in a 14-SOIC surface mount package. This device is classified as Obsolete, indicating discontinued production and limited availability. The LMC6064IM operates across a wide supply voltage range of 4.5V to 15.5V and is designed for low-power applications requiring ultra-low input bias current specifications.

Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, production planning, and long-term component sourcing strategies. Substitute parts must maintain compatibility with the 14-SOIC package footprint and preserve critical electrical performance parameters within acceptable engineering tolerances.

Key Parameters

Parameter	LMC6064IM Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	Channels
Output Type	Rail-to-Rail	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Slew Rate	0.035	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	0.01	pA
Voltage - Input Offset	100	µV
Current - Supply	80 (x4 Channels)	µA
Current - Output / Channel	26	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 85	°C
RoHS Status	Non-compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitute parts for the LMC6064IM are evaluated based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Mandatory Compatibility Parameters:

Package / Case: 14-SOIC (0.154", 3.90mm Width) — ensures PCB footprint compatibility
Number of Circuits: 4 channels — maintains functional equivalence
Output Type: Rail-to-Rail — preserves output swing characteristics
Mounting Type: Surface Mount — confirms assembly process compatibility

Electrical Performance Parameters:

Voltage - Supply Span: Minimum 4.5V to Maximum 15.5V — ensures operation across the original supply range
Operating Temperature: -40°C to 85°C minimum — maintains thermal operating envelope

Substitute Classification:

Group 1 — Direct Manufacturer Equivalent:

LMC6064IM/NOPB (Texas Instruments) — identical electrical specifications, different packaging (Tube vs. unspecified), Last Time Buy status

Group 2 — Analog Devices AD8664 Series (CMOS Amplifier):

AD8664ARZ (Tube packaging)
AD8664ARZ-REEL7 (Tape & Reel packaging)

These parts maintain CMOS amplifier topology with four circuits and 14-SOIC packaging. Enhanced electrical performance characteristics are provided while maintaining backward compatibility with supply voltage and temperature ranges.

Group 3 — Analog Devices AD8669 Series (General Purpose Amplifier):

AD8669ARZ (Tube packaging)
AD8669ARZ-REEL (Tape & Reel packaging)
AD8669ARZ-REEL7 (Tape & Reel packaging)

These parts provide general-purpose amplifier functionality with four circuits and 14-SOIC packaging. Electrical performance differs from the original specification but remains within acceptable substitution parameters for most applications.

Parameter Comparison

Parameter	LMC6064IM	LMC6064IM/NOPB	AD8664ARZ	AD8664ARZ-REEL7	AD8669ARZ	AD8669ARZ-REEL	AD8669ARZ-REEL7
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Amplifier Type	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.035	0.035	3.5	3.5	0.3	0.3	0.3
Gain Bandwidth Product (kHz)	100	100	4000	4000	540	540	540
Current - Input Bias (pA)	0.01	0.01	0.3	0.3	0.3	0.3	0.3
Voltage - Input Offset (µV)	100	100	50	50	40	40	40
Current - Supply (µA x4)	80	80	1250	1250	230	230	230
Current - Output / Channel (mA)	26	26	140	140	50	50	50
Voltage - Supply Span Min (V)	4.5	4.5	5	5	5	5	5
Voltage - Supply Span Max (V)	15.5	15.5	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
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

LMC6064IM/NOPB is the primary direct substitute, offering identical electrical specifications to the LMC6064IM. This part maintains the original slew rate of 0.035V/µs, gain bandwidth product of 100 kHz, and supply current of 80µA across four channels. The LMC6064IM/NOPB is classified as Last Time Buy, indicating limited future availability. This part achieves ROHS3 compliance, addressing regulatory requirements not met by the original LMC6064IM. Packaging differs (Tube vs. unspecified), which may affect procurement and assembly processes.

For Enhanced Performance Substitution (CMOS Topology):

The AD8664ARZ and AD8664ARZ-REEL7 (Analog Devices) provide CMOS amplifier functionality with significantly enhanced electrical performance. These parts deliver a slew rate of 3.5V/µs (100× improvement), gain bandwidth product of 4 MHz (40× improvement), and output current of 140 mA per channel (5.4× improvement). Supply current increases to 1.25mA across four channels. Both parts are Active status with extended operating temperature range (-40°C to 125°C). ROHS3 compliance is achieved. The AD8664ARZ-REEL7 is packaged in Tape & Reel format, suitable for high-volume automated assembly.

For General Purpose Substitution:

The AD8669ARZ, AD8669ARZ-REEL, and AD8669ARZ-REEL7 (Analog Devices) provide general-purpose amplifier functionality with four circuits in 14-SOIC packaging. These parts deliver intermediate performance characteristics: slew rate of 0.3V/µs, gain bandwidth product of 540 kHz, and output current of 50 mA per channel. Supply current is 230µA across four channels. All three variants are Active status with extended operating temperature range (-40°C to 125°C) and ROHS3 compliance. Packaging options include Tube (AD8669ARZ) and Tape & Reel formats (AD8669ARZ-REEL and AD8669ARZ-REEL7).

Compliance Considerations:

All substitute parts achieve ROHS3 compliance, addressing environmental and regulatory requirements. The original LMC6064IM is RoHS non-compliant. All parts maintain REACH Unaffected status and EAR99 export classification. Moisture Sensitivity Level (MSL) is 1 (Unlimited) across all parts, indicating no moisture-related handling restrictions.

Frequently Asked Questions (FAQ)

Q1: Can the AD8664ARZ directly replace the LMC6064IM in existing designs?

A: The AD8664ARZ maintains the same 14-SOIC package footprint and four-channel rail-to-rail configuration, enabling direct PCB placement. However, electrical performance differs significantly. The AD8664ARZ provides 100× higher slew rate (3.5V/µs vs. 0.035V/µs) and 40× higher gain bandwidth product (4 MHz vs. 100 kHz). Supply current increases from 80µA to 1.25mA. These differences may affect circuit behavior in applications sensitive to slew rate or bandwidth. Circuit simulation and functional testing are necessary to confirm compatibility with specific application requirements.

Q2: What is the difference between AD8664ARZ and AD8664ARZ-REEL7?

A: Both parts are electrically identical with the same specifications. The primary difference is packaging format. AD8664ARZ is supplied in Tube packaging, suitable for manual assembly or small-volume production. AD8664ARZ-REEL7 is supplied in Tape & Reel (TR) format with 7-inch reel configuration, optimized for automated pick-and-place assembly in high-volume manufacturing. Selection depends on production volume and assembly equipment capabilities.

Q3: Why does the LMC6064IM/NOPB have different availability than the LMC6064IM?

A: The LMC6064IM is classified as Obsolete (production discontinued), while LMC6064IM/NOPB is classified as Last Time Buy (final production run available). The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, reflecting the transition to ROHS3-compliant manufacturing. The LMC6064IM/NOPB represents the final opportunity to source this exact electrical specification before complete discontinuation. Inventory levels are limited (3301 pcs vs. 4867 pcs for the original).

Q4: Which substitute part should be selected for new designs?

A: For new designs, the AD8664ARZ or AD8669ARZ series are recommended due to Active product status, extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C), and ROHS3 compliance. Selection between AD8664 and AD8669 depends on application bandwidth requirements. AD8664 provides higher bandwidth (4 MHz) and slew rate (3.5V/µs) for signal conditioning and precision measurement applications. AD8669 provides intermediate bandwidth (540 kHz) and lower supply current (230µA) for power-sensitive applications.

Q5: Are there any thermal operating range limitations when substituting?

A: The LMC6064IM operates to 85°C maximum junction temperature. All substitute parts extend to 125°C, providing improved thermal margin. This allows operation in higher ambient temperature environments or applications with elevated component self-heating. Designs originally constrained by the 85°C limit may benefit from this extended range.

Q6: What packaging options are available for high-volume production?

A: For automated assembly, Tape & Reel packaging is standard. Available options include AD8664ARZ-REEL7, AD8669ARZ-REEL, and AD8669ARZ-REEL7. The "-REEL7" designation indicates 7-inch reel format, standard for most automated pick-and-place equipment. Tube packaging (AD8664ARZ, AD8669ARZ) is suitable for lower-volume or manual assembly processes.

Q7: How does supply current affect power budget in battery-powered applications?

A: The LMC6064IM draws 80µA total supply current (20µA per channel). AD8669 variants draw 230µA (57.5µA per channel), representing a 2.9× increase. AD8664 variants draw 1.25mA (312.5µA per channel), representing a 15.6× increase. For battery-powered applications with strict power budgets, the AD8669 series provides a compromise between performance enhancement and power consumption. The LMC6064IM/NOPB maintains the original 80µA specification.

Q8: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package with 0.154" (3.90mm) width is a standard surface-mount package. All substitute parts maintain this identical package specification, ensuring PCB footprint compatibility without layout modifications. This enables drop-in replacement at the component level. The 14-pin configuration accommodates four independent amplifier circuits with power supply and ground connections.

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