LMC6084AIMX CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The LMC6084AIMX is a CMOS operational amplifier IC featuring four independent circuits in a 14-SOIC surface mount package. Manufactured by Texas Instruments under the LMC® series, this device provides push-pull, rail-to-rail output configuration suitable for low-power analog signal processing applications. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain compatibility with the 14-SOIC package footprint and support the same supply voltage range and circuit count specifications.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	LMC6084AIMX	—
Manufacturer	Texas Instruments	—
Category	Linear, Amplifiers	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Number of Circuits	4	—
Amplifier Type	CMOS	—
Output Type	Push-Pull, Rail-to-Rail	—
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitute parts for the LMC6084AIMX are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Package / Case: 14-SOIC (0.154", 3.90mm Width)
Number of Circuits: 4
Mounting Type: Surface Mount
Voltage - Supply Span (Min): ≥ 4.5 V
Voltage - Supply Span (Max): ≥ 15.5 V
Output Type: Rail-to-Rail configuration

Substitution Groups:

Group 1: Direct Functional Equivalent (Same Manufacturer) LMC6084AIMX/NOPB is the direct equivalent from Texas Instruments, differing only in packaging configuration (Tape & Reel vs. bulk) and product status (Active vs. Obsolete). All electrical parameters remain identical.

Group 2: Cross-Manufacturer CMOS Amplifiers with Enhanced Performance AD8664ARZ and AD8664ARZ-REEL7 (Analog Devices Inc.) provide CMOS amplifier functionality with improved electrical characteristics including higher slew rate (3.5 V/µs vs. 1.5 V/µs), greater gain bandwidth product (4 MHz vs. 1.3 MHz), and higher output current per channel (140 mA vs. 34 mA). These parts maintain the 14-SOIC package and rail-to-rail output specification while extending the maximum operating temperature to 125°C.

Group 3: General Purpose Amplifiers with Lower Power Consumption AD8669ARZ, AD8669ARZ-REEL, and AD8669ARZ-REEL7 (Analog Devices Inc.) are general purpose operational amplifiers offering significantly reduced supply current (230 µA per 4 channels vs. 2.2 mA) at the cost of lower slew rate (0.3 V/µs) and reduced gain bandwidth product (540 kHz). These parts are suitable for power-constrained applications requiring the same package and circuit count.

All substitute parts maintain 14-SOIC package compatibility, four-circuit configuration, and rail-to-rail output capability.

Parameter Comparison

Parameter	LMC6084AIMX	LMC6084AIMX/NOPB	AD8664ARZ	AD8664ARZ-REEL7	AD8669ARZ	AD8669ARZ-REEL7
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active
Amplifier Type	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	1.5	1.5	3.5	3.5	0.3	0.3
Gain Bandwidth Product (MHz)	1.3	1.3	4	4	0.54	0.54
Current - Input Bias (pA)	0.01	0.01	0.3	0.3	0.3	0.3
Voltage - Input Offset (µV)	150	150	50	50	40	40
Current - Supply (mA x4 Channels)	2.2	2.2	1.25	1.25	0.23	0.23
Current - Output / Channel (mA)	34	34	140	140	50	50
Voltage - Supply Span (Min)	4.5 V	4.5 V	5 V	5 V	5 V	5 V
Voltage - Supply Span (Max)	15.5 V	15.5 V	16 V	16 V	16 V	16 V
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): LMC6084AIMX/NOPB is the recommended substitute when exact electrical parameter matching is required. This part maintains all specifications of the original LMC6084AIMX while offering active product status and ROHS3 compliance. The only difference is packaging configuration (Tape & Reel vs. bulk), which does not affect electrical performance or PCB integration.

For Enhanced Performance Applications: AD8664ARZ and AD8664ARZ-REEL7 are suitable when improved dynamic performance is acceptable or beneficial. These parts provide 2.7× higher slew rate, 3.1× greater gain bandwidth product, and 4.1× higher output current per channel. The extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C) supports wider environmental specifications. ROHS3 compliance and active product status ensure long-term availability.

For Power-Constrained Applications: AD8669ARZ and AD8669ARZ-REEL7 are appropriate when supply current minimization is a design priority. These general purpose amplifiers reduce total supply current by 89.5% compared to the LMC6084AIMX. Trade-offs include reduced slew rate (0.3 V/µs vs. 1.5 V/µs) and lower gain bandwidth product (540 kHz vs. 1.3 MHz), limiting applicability to low-frequency signal processing. ROHS3 compliance and active status are maintained.

Compliance Considerations: All substitute parts from Analog Devices Inc. are ROHS3 compliant, whereas the original LMC6084AIMX is RoHS non-compliant. For applications subject to RoHS regulations, LMC6084AIMX/NOPB or Analog Devices alternatives are required. All parts maintain REACH unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can LMC6084AIMX/NOPB be used as a direct drop-in replacement for LMC6084AIMX?

A: Yes. LMC6084AIMX/NOPB is electrically and functionally identical to LMC6084AIMX. The difference is packaging format: LMC6084AIMX/NOPB is supplied in Tape & Reel configuration while the original uses bulk packaging. Both use the same 14-SOIC package footprint and have identical electrical specifications. The primary advantage of the /NOPB variant is active product status and ROHS3 compliance.

Q: What are the key differences between the AD8664ARZ and AD8669ARZ?

A: Both are four-circuit amplifiers in 14-SOIC packages from Analog Devices Inc., but they serve different application requirements. The AD8664ARZ is a CMOS amplifier optimized for higher speed applications with 3.5 V/µs slew rate and 4 MHz gain bandwidth product. The AD8669ARZ is a general purpose amplifier designed for low-power operation with 0.3 V/µs slew rate and 540 kHz gain bandwidth product. The AD8669ARZ consumes 89.5% less supply current, making it suitable for battery-powered or power-limited systems.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 14-SOIC (0.154", 3.90mm Width) package, which maintains identical pin spacing and footprint dimensions. PCB layout modifications are not required for mechanical compatibility. However, electrical circuit design may require adjustment based on the selected substitute's performance characteristics.

Q: What is the minimum supply voltage for each substitute part?

A: LMC6084AIMX and LMC6084AIMX/NOPB support minimum supply voltage of 4.5 V. AD8664ARZ, AD8664ARZ-REEL7, AD8669ARZ, and AD8669ARZ-REEL7 all require minimum supply voltage of 5 V. Applications operating below 5 V must use the LMC6084 variants.

Q: Which substitute part offers the best performance for high-frequency signal processing?

A: AD8664ARZ and AD8664ARZ-REEL7 are optimized for higher frequency applications, providing 3.5 V/µs slew rate and 4 MHz gain bandwidth product compared to 1.5 V/µs and 1.3 MHz for the LMC6084AIMX. These specifications support faster signal transitions and higher frequency content processing.

Q: Are there RoHS compliance differences between the substitute parts?

A: Yes. LMC6084AIMX is RoHS non-compliant. LMC6084AIMX/NOPB, AD8664ARZ, AD8664ARZ-REEL7, AD8669ARZ, and AD8669ARZ-REEL7 are all ROHS3 compliant. For applications subject to RoHS regulations, any of the compliant alternatives must be selected.

Q: What is the maximum operating temperature for each part?

A: LMC6084AIMX and LMC6084AIMX/NOPB support operating temperatures from -40°C to 85°C. All Analog Devices substitutes (AD8664ARZ, AD8664ARZ-REEL7, AD8669ARZ, AD8669ARZ-REEL7) support extended range from -40°C to 125°C, providing 40°C additional high-temperature margin.

Q: How do input offset voltage specifications compare?

A: LMC6084AIMX specifies 150 µV input offset voltage. AD8664ARZ and AD8664ARZ-REEL7 specify 50 µV (3× improvement). AD8669ARZ and AD8669ARZ-REEL7 specify 40 µV (3.75× improvement). Lower input offset voltage reduces DC error in precision analog circuits.

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

A: Both parts are electrically identical. The difference is packaging: AD8664ARZ is supplied in Tube packaging, while AD8664ARZ-REEL7 is supplied in Tape & Reel (TR) configuration. Selection depends on assembly process requirements and volume handling procedures.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message