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LMC6084IM CMOS Amplifier Equivalent & Substitute Parts
Part Overview
The LMC6084IM is a quad CMOS operational amplifier manufactured by Texas Instruments, featuring push-pull, rail-to-rail output configuration in a 14-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The LMC6084IM operates across a wide supply voltage range of 4.5V to 15.5V with low input bias current and moderate slew rate characteristics suitable for general-purpose amplification applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | CMOS | — |
| Number of Circuits | 4 | — |
| Output Type | Push-Pull, Rail-to-Rail | — |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Slew Rate | 1.5 | V/µs |
| Gain Bandwidth Product | 1.3 | MHz |
| Current - Input Bias | 0.01 | pA |
| Voltage - Input Offset | 150 | µV |
| Current - Supply (x4 Channels) | 2.2 | mA |
| Current - Output / Channel | 34 | mA |
| 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
Substitution of the LMC6084IM is determined by the following critical parameters: quad-channel configuration, CMOS amplifier type, 14-SOIC package compatibility, rail-to-rail output capability, and supply voltage range overlap. Substitute parts are grouped into two categories based on functional equivalence and compliance status.
Direct Equivalents (Same Manufacturer): Parts maintaining identical electrical specifications and packaging from Texas Instruments, differing only in product status and RoHS compliance.
Functional Equivalents (Alternative Manufacturers): Parts from Analog Devices Inc., Advanced Linear Devices Inc., and STMicroelectronics that maintain the 14-SOIC package, quad-channel configuration, and rail-to-rail output, with variations in slew rate, gain bandwidth product, supply current, and operating temperature range.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Number of Circuits | Output Type | Slew Rate (V/µs) | GBW (MHz) | Supply Current (mA) | Output Current (mA) | Supply Voltage Min (V) | Supply Voltage Max (V) | Temp Range (°C) | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LMC6084IM | Texas Instruments | CMOS | 4 | Push-Pull, Rail-to-Rail | 1.5 | 1.3 | 2.2 | 34 | 4.5 | 15.5 | -40 to 85 | 14-SOIC | Obsolete | Non-compliant |
| LMC6084IM/NOPB | Texas Instruments | CMOS | 4 | Push-Pull, Rail-to-Rail | 1.5 | 1.3 | 2.2 | 34 | 4.5 | 15.5 | -40 to 85 | 14-SOIC | Last Time Buy | ROHS3 Compliant |
| AD8664ARZ | Analog Devices Inc. | CMOS | 4 | Rail-to-Rail | 3.5 | 4 | 1.25 | 140 | 5 | 16 | -40 to 125 | 14-SOIC | Active | ROHS3 Compliant |
| AD8664ARZ-REEL7 | Analog Devices Inc. | CMOS | 4 | Rail-to-Rail | 3.5 | 4 | 1.25 | 140 | 5 | 16 | -40 to 125 | 14-SOIC | Active | ROHS3 Compliant |
| AD8669ARZ | Analog Devices Inc. | General Purpose | 4 | Rail-to-Rail | 0.3 | 0.54 | 0.23 | 50 | 5 | 16 | -40 to 125 | 14-SOIC | Active | ROHS3 Compliant |
| AD8669ARZ-REEL7 | Analog Devices Inc. | General Purpose | 4 | Rail-to-Rail | 0.3 | 0.54 | 0.23 | 50 | 5 | 16 | -40 to 125 | 14-SOIC | Active | ROHS3 Compliant |
| ALD4702ASBL | Advanced Linear Devices Inc. | CMOS | 4 | Push-Pull, Rail-to-Rail | 2.8 | 1.7 | 4 | 8 | 4 | 10 | 0 to 70 | 14-SOIC | Active | ROHS3 Compliant |
| TS914AIDT | STMicroelectronics | CMOS | 4 | Rail-to-Rail | 1 | 1.4 | 0.23 | 60 | 2.7 | 16 | -40 to 125 | 14-SOIC | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Replacement (Highest Compatibility): LMC6084IM/NOPB is the direct equivalent from Texas Instruments with identical electrical specifications. This part is in Last Time Buy status with ROHS3 compliance, making it suitable for designs requiring exact parameter matching and legacy support.
Active Production Alternatives: AD8664ARZ and AD8664ARZ-REEL7 from Analog Devices Inc. provide enhanced performance with higher slew rate (3.5V/µs vs. 1.5V/µs), greater gain bandwidth product (4 MHz vs. 1.3 MHz), and higher output current capability (140 mA vs. 34 mA). These parts maintain CMOS amplifier type, quad configuration, and 14-SOIC packaging with extended operating temperature range (-40°C to 125°C). Both are ROHS3 compliant and in active production status.
Low-Power Alternative: AD8669ARZ and AD8669ARZ-REEL7 offer significantly reduced supply current (230 µA vs. 2.2 mA) with general-purpose amplifier classification. These parts are suitable for power-constrained applications, though they feature lower slew rate (0.3V/µs) and gain bandwidth product (540 kHz). Both maintain rail-to-rail output and 14-SOIC packaging with active production status and ROHS3 compliance.
Extended Supply Voltage Range: TS914AIDT from STMicroelectronics provides the widest supply voltage range (2.7V to 16V) with automotive-grade qualification (AEC-Q100). This part features CMOS amplifier type, quad configuration, and 14-SOIC packaging with active production status and ROHS3 compliance. Operating temperature range extends to -40°C to 125°C.
Limited Temperature Range Alternative: ALD4702ASBL from Advanced Linear Devices Inc. maintains push-pull, rail-to-rail output configuration with operating temperature range of 0°C to 70°C. This part is suitable for commercial-grade applications with restricted temperature requirements. Supply voltage range is limited to 4V to 10V.
Frequently Asked Questions (FAQ)
Q: Can AD8664ARZ directly replace LMC6084IM in all applications?
A: AD8664ARZ maintains the same package (14-SOIC), quad-channel configuration, and rail-to-rail output capability. However, it features higher slew rate (3.5V/µs vs. 1.5V/µs), greater gain bandwidth product (4 MHz vs. 1.3 MHz), and higher output current (140 mA vs. 34 mA). The minimum supply voltage is 5V versus 4.5V for the LMC6084IM. Applications operating below 5V supply voltage require verification of circuit compatibility.
Q: What is the difference between AD8664ARZ and AD8664ARZ-REEL7?
A: Both parts are electrically identical. The difference is packaging format: AD8664ARZ is supplied in Tube packaging, while AD8664ARZ-REEL7 is supplied in Tape & Reel (TR) format. Selection depends on production volume and assembly equipment compatibility.
Q: Is TS914AIDT suitable for automotive applications?
A: TS914AIDT carries automotive-grade qualification with AEC-Q100 certification. It is suitable for automotive applications requiring extended operating temperature range (-40°C to 125°C) and wide supply voltage range (2.7V to 16V). The part maintains CMOS amplifier type and quad configuration in 14-SOIC packaging.
Q: Why does AD8669ARZ have lower performance specifications than AD8664ARZ?
A: AD8669ARZ is classified as a general-purpose amplifier with lower slew rate (0.3V/µs) and gain bandwidth product (540 kHz) compared to AD8664ARZ. However, AD8669ARZ offers significantly reduced supply current (230 µA vs. 1.25 mA), making it suitable for power-constrained applications. Selection depends on application requirements for speed versus power consumption.
Q: Can ALD4702ASBL be used in applications requiring extended temperature range?
A: ALD4702ASBL operates within 0°C to 70°C temperature range, which is narrower than the LMC6084IM (-40°C to 85°C). Applications requiring operation below 0°C or above 70°C require alternative parts such as AD8664ARZ, AD8669ARZ, or TS914AIDT, which all support -40°C to 125°C range.
Q: What is the significance of RoHS compliance status?
A: LMC6084IM is RoHS non-compliant, while all substitute parts listed are ROHS3 compliant. ROHS3 compliance indicates conformance to Restriction of Hazardous Substances regulations. For new designs and production environments with RoHS requirements, ROHS3-compliant alternatives are necessary.
Q: Are there supply voltage compatibility issues between LMC6084IM and its substitutes?
A: LMC6084IM operates from 4.5V to 15.5V. AD8664ARZ and AD8669ARZ operate from 5V to 16V, requiring minimum 5V supply. TS914AIDT operates from 2.7V to 16V, providing wider low-voltage capability. ALD4702ASBL operates from 4V to 10V with limited maximum voltage. Circuit designs operating at 4.5V supply voltage cannot use AD8664ARZ or AD8669ARZ without supply voltage adjustment.
Q: What packaging options are available for substitute parts?
A: All substitute parts maintain 14-SOIC (0.154", 3.90mm Width) surface mount package compatibility. Packaging format variations include Tube (standard), Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel®. Selection depends on production volume, assembly equipment, and inventory management requirements.
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