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LMP2012MA Equivalent & Substitute Parts
Part Overview
The LMP2012MA is a general-purpose operational amplifier featuring dual circuits in an 8-SOIC surface mount package. This device delivers rail-to-rail output capability with a 4V/µs slew rate and 3 MHz gain bandwidth product, designed for low-power applications requiring dual amplifier functionality. The LMP2012MA is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain compatibility across electrical performance, package form factor, and supply voltage specifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 4 | V/µs |
| Gain Bandwidth Product | 3 | MHz |
| Current - Input Bias | 3 | pA |
| Voltage - Input Offset | 0.12 | µV |
| Current - Supply | 930 | µA |
| Current - Output / Channel | 17 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.25 | V |
| Operating Temperature | -40 to 125 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | RoHS non-compliant | — |
Substitute Part Grouping Explanation
Substitute parts for the LMP2012MA are grouped into two functional categories based on electrical performance alignment and application compatibility:
Category 1: Direct Functional Equivalents (General Purpose Amplifiers) These parts maintain the general-purpose amplifier classification with dual circuits and rail-to-rail output. Substitutes in this category include AD8646ARZ, AD8646ARZ-REEL, AD8646ARZ-REEL7, AD8646WARZ-R7, and AD8646WARZ-RL. These devices operate within the same supply voltage range (2.7V to 5.5V) and 8-SOIC package specification. While these parts exhibit higher slew rate (11V/µs) and gain bandwidth product (24 MHz), they remain compatible for applications where the LMP2012MA performance envelope is acceptable.
Category 2: Enhanced Performance Alternatives (Zero-Drift and High-Speed Amplifiers) These parts include AD8629ARZ-REEL7, AD8629WARZ-R7, AD8629WARZ-RL, and ADA4891-2ARZ. The AD8629 series provides zero-drift amplifier topology with improved input offset voltage (1 µV) and lower input bias current (30 pA). The ADA4891-2ARZ offers CMOS architecture with significantly enhanced slew rate (210V/µs) and gain bandwidth product (105 MHz). All maintain 8-SOIC packaging and compatible supply voltage ranges.
Direct Packaging Equivalent: LMP2012MA/NOPB represents the same base product (LMP2012) with identical electrical specifications but in active product status with RoHS3 compliance and tube packaging.
Substitution eligibility is determined by: (1) identical package form factor (8-SOIC), (2) compatible supply voltage span overlap (minimum 2.7V, maximum ≥5.0V), (3) dual-circuit configuration, (4) rail-to-rail output capability, and (5) operating temperature range (-40°C to 125°C).
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Input Offset (µV) | Supply Current (mA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LMP2012MA | Texas Instruments | General Purpose | 4 | 3 | 3 | 0.12 | 0.93 | 17 | 2.7 | 5.25 | Obsolete | Non-compliant |
| LMP2012MA/NOPB | Texas Instruments | General Purpose | 4 | 3 | 3 | 0.12 | 0.93 | 17 | 2.7 | 5.25 | Active | ROHS3 Compliant |
| AD8629ARZ-REEL7 | Analog Devices | Zero-Drift | 1 | 2.5 | 30 | 1 | — | 30 | 2.7 | 5 | Active | ROHS3 Compliant |
| AD8629WARZ-R7 | Analog Devices | Zero-Drift | 1 | 2.5 | 30 | 1 | — | 30 | 2.7 | 5 | Active | ROHS3 Compliant |
| AD8629WARZ-RL | Analog Devices | Zero-Drift | 1 | 2.5 | 30 | 1 | — | 30 | 2.7 | 5 | Active | ROHS3 Compliant |
| AD8646ARZ | Analog Devices | General Purpose | 11 | 24 | 0.3 | 600 | 3 | 120 | 2.7 | 5.5 | Active | ROHS3 Compliant |
| AD8646ARZ-REEL | Analog Devices | General Purpose | 11 | 24 | 0.3 | 600 | 3 | 120 | 2.7 | 5.5 | Active | ROHS3 Compliant |
| AD8646ARZ-REEL7 | Analog Devices | General Purpose | 11 | 24 | 0.3 | 600 | 3 | 120 | 2.7 | 5.5 | Active | ROHS3 Compliant |
| AD8646WARZ-R7 | Analog Devices | General Purpose | 11 | 24 | 0.3 | 600 | 3 | 120 | 2.7 | 5.5 | Active | ROHS3 Compliant |
| AD8646WARZ-RL | Analog Devices | General Purpose | 11 | 24 | 0.3 | 600 | 3 | 120 | 2.7 | 5.5 | Active | ROHS3 Compliant |
| ADA4891-2ARZ | Analog Devices | CMOS | 210 | 105 | 2 | 2500 | 4.4 | 125 | 2.7 | 5.5 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Replacement with Compliance Upgrade: LMP2012MA/NOPB is the primary recommendation for applications requiring identical electrical performance with active product status. This part maintains all electrical specifications of the obsolete LMP2012MA while providing ROHS3 compliance and active manufacturing support. Packaging format (tube) accommodates standard component handling workflows.
For General-Purpose Applications with Enhanced Performance: The AD8646 series (AD8646ARZ, AD8646ARZ-REEL, AD8646ARZ-REEL7, AD8646WARZ-R7, AD8646WARZ-RL) provides superior slew rate (11V/µs versus 4V/µs) and gain bandwidth product (24 MHz versus 3 MHz) while maintaining general-purpose amplifier classification. These parts are suitable for applications where increased bandwidth and faster transient response provide system benefits. All variants are ROHS3 compliant with active product status. Selection among variants depends on packaging requirements: tube (AD8646ARZ), cut tape with digi-reel (AD8646ARZ-REEL, AD8646ARZ-REEL7), or tape and reel (AD8646WARZ-R7, AD8646WARZ-RL).
For Low-Offset Applications: The AD8629 series (AD8629ARZ-REEL7, AD8629WARZ-R7, AD8629WARZ-RL) offers zero-drift amplifier topology with input offset voltage of 1 µV and input bias current of 30 pA. These parts are appropriate for precision measurement and sensor signal conditioning applications where offset drift minimization is critical. Supply voltage maximum is 5V (versus 5.25V for LMP2012MA), requiring verification in designs operating near upper supply limits.
For High-Speed Applications: The ADA4891-2ARZ provides CMOS amplifier architecture with exceptional slew rate (210V/µs) and gain bandwidth product (105 MHz). This part is suitable for applications requiring high-frequency signal processing or fast transient response. Higher supply current (4.4mA per channel versus 0.93mA) and input offset voltage (2.5mV) must be evaluated against application requirements.
Compliance Considerations: All recommended substitute parts carry ROHS3 compliance and active product status. The LMP2012MA is RoHS non-compliant; designs targeting RoHS-compliant bill of materials must transition to LMP2012MA/NOPB or alternative parts listed above.
Frequently Asked Questions (FAQ)
Q: Can the LMP2012MA/NOPB be used as a direct drop-in replacement for the obsolete LMP2012MA?
A: Yes. The LMP2012MA/NOPB maintains identical electrical specifications, package form factor (8-SOIC), and pin configuration. The primary differences are active product status and ROHS3 compliance. No circuit modifications are required.
Q: What are the key differences between the AD8646 series and the LMP2012MA?
A: The AD8646 series provides higher slew rate (11V/µs versus 4V/µs) and gain bandwidth product (24 MHz versus 3 MHz). Input bias current is lower (0.3 pA versus 3 pA). Supply current per channel is higher (1.5mA versus 0.465mA). All parts maintain 8-SOIC packaging, rail-to-rail output, and compatible supply voltage ranges. The AD8646 is suitable for applications requiring faster signal processing.
Q: When should the AD8629 zero-drift amplifier be selected over the AD8646?
A: The AD8629 is selected for applications requiring minimized input offset voltage (1 µV versus 600 µV for AD8646) and low input bias current (30 pA). Zero-drift topology eliminates offset drift over temperature and time. Applications include precision instrumentation, sensor signal conditioning, and medical measurement systems. The trade-off is lower slew rate (1V/µs) and gain bandwidth product (2.5 MHz).
Q: Are all substitute parts available in the same packaging options?
A: No. Packaging varies by part number. LMP2012MA/NOPB is supplied in tube. AD8629 variants are available in cut tape with digi-reel or tape and reel. AD8646 variants span tube, cut tape with digi-reel, and tape and reel formats. ADA4891-2ARZ is supplied in tube. Verify packaging compatibility with procurement and assembly processes before selection.
Q: What is the maximum supply voltage for each substitute part?
A: LMP2012MA and LMP2012MA/NOPB support 5.25V maximum. AD8629 series supports 5V maximum. AD8646 series and ADA4891-2ARZ support 5.5V maximum. Designs operating at 5.25V cannot use AD8629 parts without supply voltage reduction.
Q: Is the ADA4891-2ARZ suitable for low-power applications?
A: The ADA4891-2ARZ has higher supply current (4.4mA per channel) compared to the LMP2012MA (0.93mA total). This part is not recommended for battery-powered or ultra-low-power applications. The LMP2012MA/NOPB or AD8629 series are preferred for power-constrained designs.
Q: Can the AD8646 and ADA4891-2ARZ be used interchangeably?
A: No. While both are general-purpose amplifiers in 8-SOIC packages, the ADA4891-2ARZ is CMOS architecture with significantly higher performance (210V/µs slew rate, 105 MHz bandwidth) and higher supply current. The AD8646 is a general-purpose amplifier with moderate performance enhancement. Selection depends on specific bandwidth and slew rate requirements.
Q: What compliance certifications apply to all recommended substitute parts?
A: All substitute parts (LMP2012MA/NOPB, AD8629 series, AD8646 series, ADA4891-2ARZ) are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. All carry HTSUS code 8542.33.0001. Moisture sensitivity level is 1 (unlimited) for all parts.
Q: How do input offset voltage specifications affect circuit design?
A: The LMP2012MA specifies 0.12 µV input offset. The AD8629 specifies 1 µV, and the AD8646 specifies 600 µV. For precision DC applications, lower offset voltage reduces calibration requirements and improves accuracy. For AC-coupled or high-gain applications, offset voltage may be less critical. Circuit design must account for offset voltage in gain calculations and noise analysis.
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