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LMV922MX Equivalent & Substitute Parts
Part Overview
The LMV922MX is a general-purpose operational amplifier manufactured by Texas Instruments, featuring two circuits in an 8-SOIC package with rail-to-rail output capability. This device is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design requirements and production continuity. The LMV922MX operates across a supply voltage range of 1.5V to 5V with an operating temperature range of -40°C to 85°C, making it suitable for low-power, battery-operated applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | LMV922MX | — |
| Manufacturer | Texas Instruments | — |
| Category | Linear, Amplifiers | — |
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Slew Rate | 0.45 | V/µs |
| Gain Bandwidth Product | 1 | MHz |
| Current - Input Bias | 12 | nA |
| Voltage - Input Offset | 1.5 | mV |
| Current - Supply | 400 | µA |
| Current - Output / Channel | 75 | mA |
| Voltage - Supply Span (Min) | 1.5 | V |
| Voltage - Supply Span (Max) | 5 | V |
| Operating Temperature | -40 to 85 | °C |
| Mounting Type | Surface Mount | — |
| Product Status | Obsolete | — |
| RoHS Status | RoHS non-compliant | — |
Substitute Part Grouping Explanation
Substitution of the LMV922MX is determined by the following critical parameters:
Primary Substitution Criteria:
- Number of Circuits: 2 (dual-channel configuration)
- Output Type: Rail-to-Rail
- Package Type: 8-SOIC form factor
- Operating Temperature Range: Minimum -40°C to 85°C
- Supply Voltage Range: Compatibility with 1.5V to 5V operation
Secondary Compatibility Factors:
- Slew Rate: 0.45V/µs or higher
- Gain Bandwidth Product: 1 MHz or higher
- Current - Output / Channel: 75 mA or higher
- Input Bias Current: 12 nA or lower
- Input Offset Voltage: 1.5 mV or lower
Substitute parts are grouped into two categories based on their electrical performance characteristics and product status:
Category A - Direct Functional Equivalents (Active Status): Parts that maintain the same circuit count (2), package type (8-SOIC), and output configuration (rail-to-rail) with comparable or superior electrical performance. These parts are currently in active production status and RoHS3 compliant.
Category B - Performance-Optimized Alternatives: Parts that meet the core substitution criteria but may feature enhanced performance specifications (higher slew rate, increased bandwidth, improved temperature range) or different amplifier technology (CMOS vs. general-purpose bipolar).
Parameter Comparison
| Part Number | Manufacturer | Circuits | Package | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA/nA) | Input Offset (mV/µV) | Supply Current (µA/nA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Status | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LMV922MX | Texas Instruments | 2 | 8-SOIC | 0.45 | 1 | 12 nA | 1.5 mV | 400 µA | 75 | 1.5 | 5 | -40 to 85 | Obsolete | Non-compliant |
| MAX4471ESA+ | Analog Devices Inc./Maxim | 2 | 8-SOIC | 0.002 | 0.009 | 200 pA | 500 µV | 750 nA | 36 | 1.8 | 5.5 | -40 to 85 | Active | ROHS3 |
| MAX4471ESA+T | Analog Devices Inc./Maxim | 2 | 8-SOIC | 0.002 | 0.009 | 200 pA | 500 µV | 750 nA | 36 | 1.8 | 5.5 | -40 to 85 | Active | ROHS3 |
| NCS20032DR2G | onsemi | 2 | 8-SOIC | 8 | 7 | 1 pA | 500 µV | 275 µA | 96 | 1.7 | 5.5 | -40 to 125 | Active | ROHS3 |
| NCV20032DR2G | onsemi | 2 | 8-SOIC | 8 | 7 | 1 pA | 500 µV | 275 µA | 14 | 1.7 | 5.5 | -40 to 125 | Active | ROHS3 |
| LMR932F-GE2 | Rohm Semiconductor | 2 | 8-SOIC | 0.35 | 1.4 | 5 nA | 1 mV | 140 µA | 90 | 1.8 | 5 | -40 to 85 | Active | ROHS3 |
| RE46C312S8F | Microchip Technology | 2 | 8-SOIC | 0.003 | 0.01 | — | 3 mV | 600 nA | 27 | 1.8 | 5.5 | -10 to 60 | Active | ROHS3 |
| BU7266F-E2 | Rohm Semiconductor | 2 | 8-SOIC | 0.0024 | 0.004 | 1 pA | 1 mV | 700 nA | 4 | 1.8 | 5.5 | -40 to 85 | Active | ROHS3 |
| BU7266SF-E2 | Rohm Semiconductor | 2 | 8-SOIC | 0.0024 | 0.004 | 1 pA | 1 mV | 700 nA | 4 | 1.8 | 5.5 | -40 to 105 | Active | ROHS3 |
| BU7486F-E2 | Rohm Semiconductor | 2 | 8-SOIC | 10 | 10 | 1 pA | 1 mV | 6000 nA | 12 | 3 | 5.5 | -40 to 105 | Active | ROHS3 |
| AD8531ARTZ-REEL7 | Analog Devices Inc. | 1 | SOT-23-5 | 5 | 3 | 5 pA | 25 mV | 750 µA | 250 | 2.7 | 6 | -40 to 85 | Active | ROHS3 |
Engineering Selection Recommendations
For Direct Replacement (Pin-Compatible, Same Package):
The LMR932F-GE2 from Rohm Semiconductor provides the closest functional equivalence to the LMV922MX. Both devices feature dual-channel general-purpose amplifier configurations in 8-SOIC packages with rail-to-rail output. The LMR932F-GE2 maintains comparable slew rate (0.35V/µs vs. 0.45V/µs), similar gain bandwidth product (1.4 MHz vs. 1 MHz), and superior input bias current performance (5 nA vs. 12 nA). Critically, the LMR932F-GE2 is RoHS3 compliant and in active production status, addressing the obsolescence and compliance limitations of the original part.
For Enhanced Performance Applications:
The NCS20032DR2G and NCV20032DR2G from onsemi offer significantly improved performance specifications while maintaining the 8-SOIC package format and dual-channel configuration. These devices provide 8V/µs slew rate and 7 MHz gain bandwidth product, substantially exceeding the LMV922MX baseline. The extended operating temperature range (-40°C to 125°C) accommodates industrial and automotive applications. The NCS20032DR2G supports 96 mA output current per channel, exceeding the LMV922MX specification of 75 mA. Both variants are RoHS3 compliant and actively produced.
For Ultra-Low Power Applications:
The MAX4471ESA+ and MAX4471ESA+T from Analog Devices Inc./Maxim Integrated are optimized for ultra-low power consumption (750 nA supply current per dual-channel configuration). These parts maintain the 8-SOIC package and dual-channel architecture. While slew rate and bandwidth are reduced (0.002V/µs, 9 kHz), these specifications are appropriate for precision measurement and sensor signal conditioning applications where power consumption is the primary constraint. Both variants are RoHS3 compliant and in active production.
For CMOS Technology Migration:
The BU7266SF-E2 from Rohm Semiconductor represents a CMOS-based alternative with extended operating temperature range (-40°C to 105°C). This device features ultra-low supply current (700 nA) and minimal input offset voltage (1 mV). The reduced output current capability (4 mA per channel) limits applicability to high-impedance load conditions. The BU7486F-E2 variant provides higher performance (10V/µs slew rate, 10 MHz bandwidth) suitable for signal conditioning applications requiring faster response times.
Compliance and Production Status:
All recommended substitute parts are RoHS3 compliant and in active production status, eliminating the obsolescence risk associated with the LMV922MX. Selection should prioritize parts matching the specific application requirements for slew rate, bandwidth, output current, and operating temperature range.
Frequently Asked Questions (FAQ)
Q1: Can the AD8531ARTZ-REEL7 directly replace the LMV922MX?
No. The AD8531ARTZ-REEL7 is a single-channel amplifier in SOT-23-5 package, whereas the LMV922MX is a dual-channel device in 8-SOIC package. Different circuit count and package format preclude direct substitution. The AD8531ARTZ-REEL7 requires two separate devices to achieve dual-channel functionality, increasing board space and component count.
Q2: What is the primary reason to substitute the LMV922MX?
The LMV922MX is classified as obsolete and RoHS non-compliant. These factors create supply chain risk and regulatory compliance issues for new designs and production continuity. Active substitute parts ensure long-term availability and compliance with environmental regulations.
Q3: Are the MAX4471ESA+ and MAX4471ESA+T electrically identical?
Yes, both parts are electrically identical. The difference is packaging format: MAX4471ESA+ is supplied in Tube packaging, while MAX4471ESA+T is supplied in Tape & Reel (TR) format. Selection depends on production volume and assembly equipment compatibility.
Q4: Which substitute part offers the best performance improvement over the LMV922MX?
The NCS20032DR2G provides the most significant performance enhancement, featuring 8V/µs slew rate (vs. 0.45V/µs), 7 MHz gain bandwidth product (vs. 1 MHz), and extended temperature range to 125°C. This device is suitable for applications requiring faster signal response and wider operating temperature coverage.
Q5: Can the LMR932F-GE2 operate at the same supply voltage as the LMV922MX?
The LMR932F-GE2 operates across 1.8V to 5V, compared to the LMV922MX range of 1.5V to 5V. For applications requiring operation below 1.8V, the LMR932F-GE2 is not suitable. The NCS20032DR2G supports 1.7V minimum supply voltage, providing closer compatibility with the original 1.5V specification.
Q6: What is the impact of reduced output current in the BU7266SF-E2 compared to the LMV922MX?
The BU7266SF-E2 provides 4 mA output current per channel versus 75 mA for the LMV922MX. This reduction limits applicability to high-impedance loads (typically 10 kΩ or higher). Applications requiring direct drive of low-impedance loads or capacitive loads require higher output current capability, making the NCS20032DR2G or LMR932F-GE2 more appropriate.
Q7: Is the RE46C312S8F suitable for all temperature ranges specified for the LMV922MX?
No. The RE46C312S8F operates across -10°C to 60°C, which is narrower than the LMV922MX range of -40°C to 85°C. This device is not suitable for applications requiring operation below -10°C or above 60°C. The LMR932F-GE2 or NCS20032DR2G are required for full temperature range compatibility.
Q8: What packaging considerations apply when substituting the LMV922MX?
All recommended substitute parts maintain the 8-SOIC package format, ensuring PCB footprint compatibility. However, packaging format (Tube, Cut Tape, Tape & Reel) affects procurement and assembly processes. Verify assembly equipment compatibility with the selected packaging format before finalizing part selection.
Q9: How does input bias current affect circuit design when substituting parts?
The LMV922MX specifies 12 nA input bias current. Substitute parts range from 1 pA (NCS20032DR2G, BU7266SF-E2) to 200 pA (MAX4471ESA+). Lower input bias current reduces errors in precision measurement circuits and high-impedance sensor applications. For general-purpose applications, this parameter has minimal impact on circuit performance.
Q10: Are there any supply voltage compatibility issues between the LMV922MX and recommended substitutes?
The LMV922MX operates at 1.5V to 5V. Most substitutes support 1.8V to 5.5V, requiring verification that designs do not operate below 1.8V. The NCS20032DR2G (1.7V minimum) provides closer compatibility. The BU7486F-E2 requires minimum 3V supply, making it unsuitable for low-voltage applications.
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