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LMC6061AIM Equivalent & Substitute Parts
Part Overview
The LMC6061AIM is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device is classified as obsolete, indicating it has been discontinued and is no longer in active production. The LMC6061AIM features rail-to-rail output capability and is designed for low-power applications requiring minimal input bias current.
Due to its obsolete status, sourcing new units from the original manufacturer is no longer possible. Equivalent and substitute parts from active product lines provide functional alternatives while maintaining compatibility with existing circuit designs that employ the 8-SOIC package footprint.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 0.035 | V/µs |
| Gain Bandwidth Product | 100 | kHz |
| Current - Input Bias | 0.01 | pA |
| Voltage - Input Offset | 100 | µV |
| Current - Supply | 24 | µA |
| Current - Output / Channel | 26 | mA |
| Voltage - Supply Span (Min) | 4.5 | V |
| Voltage - Supply Span (Max) | 15.5 | V |
| Operating Temperature Range | -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 | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LMC6061AIM is determined by the following critical parameters:
Mechanical Compatibility:
- Package type: 8-SOIC (0.154", 3.90mm Width)
- Mounting type: Surface Mount
- Pin count and footprint must match for direct PCB replacement
Electrical Compatibility:
- Output type: Rail-to-Rail
- Number of circuits: 1
- Supply voltage range: Minimum 4.5 V, Maximum 15.5 V
- Operating temperature range: -40°C to 85°C minimum
Functional Characteristics:
- Amplifier classification: General Purpose
- Input bias current: 0.01 pA or lower
- Input offset voltage: 100 µV or lower
All substitute parts listed maintain identical package geometry and pin configuration, ensuring direct PCB compatibility. Substitute parts from Analog Devices Inc. (AD8661 and AD8663 series) meet or exceed the electrical specifications of the LMC6061AIM while offering active product status and improved compliance certifications.
Parameter Comparison
| Parameter | LMC6061AIM | LMC6061AIM/NOPB | AD8661ARZ | AD8661ARZ-REEL | AD8661ARZ-REEL7 | AD8663ARZ | AD8663ARZ-REEL | AD8663ARZ-REEL7 |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Product Status | Obsolete | Obsolete | Active | Active | Active | Active | Active | Active |
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Output Type | Rail-to-Rail | 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) | 0.035 | 0.035 | 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) | 0.01 | 0.01 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Voltage - Input Offset (µV) | 100 | 100 | 50 | 50 | 50 | 40 | 40 | 40 |
| Current - Supply (µA) | 24 | 24 | 1250 | 1250 | 1250 | 230 | 230 | 230 |
| Current - Output / Channel (mA) | 26 | 26 | 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 |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Direct Equivalent (Packaging Variant):
LMC6061AIM/NOPB is the direct equivalent of LMC6061AIM, differing only in packaging format (Tube versus standard packaging). Both parts are obsolete products from Texas Instruments. LMC6061AIM/NOPB offers improved RoHS3 compliance compared to the original LMC6061AIM, making it preferable for new designs or compliance-sensitive applications, though both remain discontinued products.
Active Substitute Selection:
For applications requiring an active, currently manufactured alternative, the AD8661 and AD8663 series from Analog Devices Inc. provide direct functional substitutes. Both series are available in multiple packaging formats (Tube, Tape & Reel, and Cut Tape & Digi-Reel).
AD8661ARZ Series Selection:
- Choose AD8661ARZ (Tube packaging) for standard component procurement
- Choose AD8661ARZ-REEL (Tape & Reel) for high-volume automated assembly
- Choose AD8661ARZ-REEL7 (Cut Tape & Digi-Reel) for flexible quantity requirements
The AD8661 series delivers superior performance characteristics: 40× higher gain bandwidth product (4 MHz versus 100 kHz), 100× faster slew rate (3.5 V/µs versus 0.035 V/µs), and 5.4× higher output current capability (140 mA versus 26 mA). These improvements enable use in higher-frequency applications while maintaining backward compatibility with the 8-SOIC footprint.
AD8663ARZ Series Selection:
- Choose AD8663ARZ (Tube packaging) for standard component procurement
- Choose AD8663ARZ-REEL (Tape & Reel) for high-volume automated assembly
- Choose AD8663ARZ-REEL7 (Cut Tape & Digi-Reel) for flexible quantity requirements
The AD8663 series provides a performance middle ground: 5.4× higher gain bandwidth product (540 kHz versus 100 kHz) and 8.6× faster slew rate (0.3 V/µs versus 0.035 V/µs) compared to the LMC6061AIM, while maintaining lower supply current (230 µA versus 24 µA for the original). This series suits applications requiring improved bandwidth without the full performance envelope of the AD8661.
Compliance Considerations:
All Analog Devices substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and compliance with current environmental regulations. The original LMC6061AIM is RoHS non-compliant; LMC6061AIM/NOPB provides an intermediate option with improved compliance but discontinued status.
Supply Voltage Compatibility:
All substitute parts operate within the LMC6061AIM supply voltage range (4.5 V to 15.5 V minimum requirement; substitutes support 5 V to 16 V). Circuits designed for the LMC6061AIM require no supply voltage modifications when transitioning to AD8661 or AD8663 alternatives.
Temperature Range Extension:
Analog Devices substitutes extend the operating temperature range to -40°C to 125°C, compared to the LMC6061AIM specification of -40°C to 85°C. This provides additional thermal margin for applications operating near temperature extremes.
Frequently Asked Questions (FAQ)
Q: Can I directly replace LMC6061AIM with AD8661ARZ on my PCB?
A: Yes. Both devices use identical 8-SOIC (0.154", 3.90mm Width) surface-mount packages with matching pin configurations. No PCB modifications are required. The AD8661ARZ will function as a direct pin-compatible substitute.
Q: What is the difference between AD8661ARZ, AD8661ARZ-REEL, and AD8661ARZ-REEL7?
A: These three part numbers represent the same device in different packaging formats. AD8661ARZ is supplied in Tube packaging for standard procurement. AD8661ARZ-REEL is supplied in Tape & Reel format for high-volume automated assembly. AD8661ARZ-REEL7 is supplied in Cut Tape & Digi-Reel format, offering flexibility for intermediate volume requirements. Electrical specifications are identical across all three variants.
Q: Why does the AD8661 have higher supply current than the LMC6061AIM?
A: The AD8661 operates at 1.25 mA supply current compared to the LMC6061AIM's 24 µA. This increased current consumption reflects the AD8661's significantly higher performance: 40× greater gain bandwidth product and 100× faster slew rate. The trade-off between power consumption and performance must be evaluated for your specific application requirements.
Q: Should I choose AD8661 or AD8663 as my substitute?
A: Selection depends on your application's bandwidth and slew rate requirements. The AD8661 (4 MHz gain bandwidth product, 3.5 V/µs slew rate) suits high-frequency applications. The AD8663 (540 kHz gain bandwidth product, 0.3 V/µs slew rate) provides moderate performance improvement with lower supply current (230 µA). For applications where the LMC6061AIM's 100 kHz bandwidth was adequate, the AD8663 offers a balanced upgrade path.
Q: Is the LMC6061AIM/NOPB still available as an alternative to the original LMC6061AIM?
A: LMC6061AIM/NOPB is also classified as obsolete and is no longer manufactured. While it may be available from existing inventory, it should not be considered a long-term solution. Active substitutes from Analog Devices (AD8661 or AD8663 series) are recommended for new designs and ongoing production.
Q: What does RoHS3 compliance mean for my application?
A: RoHS3 compliance indicates the device meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials including lead, mercury, and cadmium. If your application or end market requires RoHS compliance, all Analog Devices substitutes (AD8661 and AD8663 series) meet this requirement, while the original LMC6061AIM does not.
Q: Can I use these substitutes in applications requiring the extended -40°C to 85°C temperature range of the LMC6061AIM?
A: Yes. All substitute parts support the -40°C to 85°C range and extend it to -40°C to 125°C. Your application will function correctly within the original temperature specification, with additional thermal margin available if needed.
Q: Are there any circuit design changes required when switching from LMC6061AIM to AD8661ARZ?
A: No circuit design changes are required. The AD8661ARZ is a pin-compatible substitute with identical package geometry. However, the AD8661's superior performance characteristics (higher bandwidth, faster slew rate, greater output current) may allow optimization of existing circuit designs if desired.
Q: What is the Moisture Sensitivity Level (MSL) rating, and why is it the same for all parts?
A: MSL 1 (Unlimited) indicates the device has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts share this rating, meaning no additional moisture management procedures are necessary when transitioning between parts.
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