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LMV934IPWR Equivalent & Substitute Parts
Part Overview
The LMV934IPWR is a general-purpose operational amplifier manufactured by Texas Instruments, featuring four independent circuits in a 14-TSSOP surface-mount package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The LMV934IPWR operates across a 1.8V to 5V supply range with rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | LMV934IPWR | — |
| Manufacturer | Texas Instruments | — |
| Product Status | Obsolete | — |
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 14-TSSOP (0.173", 4.40mm Width) | — |
| Slew Rate | 0.42 | V/µs |
| Gain Bandwidth Product | 1.5 | MHz |
| Current - Input Bias | 15 | nA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply (x4 Channels) | 116 | µA |
| Current - Output / Channel | 100 | mA |
| Voltage - Supply Span (Min) | 1.8 | V |
| Voltage - Supply Span (Max) | 5 | V |
| Operating Temperature | -40 to 125 | °C |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LMV934IPWR is determined by the following critical parameters:
Primary Substitution Criteria:
- Package type: 14-TSSOP surface-mount configuration
- Number of circuits: 4 independent amplifier channels
- Output configuration: Rail-to-rail capability
- Supply voltage range: Minimum 1.8V operation
- Amplifier classification: General-purpose operational amplifier
Secondary Compatibility Parameters:
- Slew rate (0.42V/µs baseline)
- Gain bandwidth product (1.5 MHz baseline)
- Input bias current (15 nA baseline)
- Input offset voltage (1 mV baseline)
- Supply current per channel (116µA baseline)
- Output current capability (100 mA per channel baseline)
- Operating temperature range (-40°C to 125°C baseline)
Substitute parts are grouped into two categories based on electrical performance alignment:
Category A - Direct Functional Equivalents: Parts maintaining similar electrical performance characteristics within the baseline parameters, suitable for direct replacement in existing designs.
Category B - Enhanced Performance Alternatives: Parts with improved electrical specifications (higher slew rate, higher gain bandwidth product, lower input bias current) that provide superior performance while maintaining package and pin compatibility.
Parameter Comparison
| Part Number | Manufacturer | Status | Slew Rate (V/µs) | GBW (MHz) | Input Bias (nA) | Supply Current (µA) | Output Current (mA) | Vcc Min (V) | Vcc Max (V) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LMV934IPWR | Texas Instruments | Obsolete | 0.42 | 1.5 | 15 | 116 | 100 | 1.8 | 5.0 | -40 to 125 | 14-TSSOP |
| LMV934MT/NOPB | National Semiconductor | Active | 0.42 | 1.5 | 14 | 116 | 100 | 1.8 | 5.5 | -40 to 125 | 14-TSSOP |
| LMV934MTX/NOPB | National Semiconductor | Active | 0.42 | 1.5 | 14 | 116 | 100 | 1.8 | 5.5 | -40 to 125 | 14-TSSOP |
| AD8648ARUZ | Analog Devices Inc. | Active | 11 | 24 | 0.0003 | 1500 | 120 | 2.7 | 5.5 | -40 to 125 | 14-TSSOP |
| AD8648ARUZ-REEL | Analog Devices Inc. | Active | 11 | 24 | 0.0003 | 1500 | 120 | 2.7 | 5.5 | -40 to 125 | 14-TSSOP |
| BD12734FVJ-E2 | Rohm Semiconductor | Active | 0.4 | 1.0 | 50 | 1200 | 12 | 1.8 | 5.0 | -40 to 85 | 14-TSSOP |
| BU7487FV-E2 | Rohm Semiconductor | Active | 10 | 10 | 0.001 | 6000 | 12 | 3.0 | 5.5 | -40 to 105 | 14-LSSOP |
| BU7487SFV-E2 | Rohm Semiconductor | Active | 10 | 10 | 0.001 | 6000 | 12 | 3.0 | 5.5 | -40 to 105 | 14-LSSOP |
| LMR344FVJ-E2 | Rohm Semiconductor | Active | 1.0 | 2.0 | 0.001 | 400 | 113 | 2.7 | 5.5 | -40 to 85 | 14-TSSOP |
| LMR934FVJ-E2 | Rohm Semiconductor | Active | 0.35 | 1.4 | 5 | 250 | 90 | 1.8 | 5.0 | -40 to 85 | 14-TSSOP |
| MCP6424-E/ST | Microchip Technology | Active | 0.05 | 0.09 | 0.001 | 4.4 | 22 | 1.8 | 5.5 | -40 to 125 | 14-TSSOP |
Engineering Selection Recommendations
Category A - Direct Functional Equivalents (Recommended for Replacement):
The LMV934MT/NOPB and LMV934MTX/NOPB from National Semiconductor are the primary recommended substitutes. Both parts maintain identical electrical performance specifications to the LMV934IPWR with the following advantages:
- Active product status ensures long-term availability and supply continuity
- Automotive-grade qualification (AEC-Q100) provides enhanced reliability documentation
- Extended maximum supply voltage (5.5V vs. 5.0V) offers improved design margin
- Identical slew rate, gain bandwidth product, and output current specifications
- Matching input bias current and offset voltage characteristics
- Equivalent operating temperature range (-40°C to 125°C)
- ROHS3 compliance and MSL Level 1 rating maintained
The LMV934MTX/NOPB variant offers significantly higher inventory availability (17,700 pieces) compared to LMV934MT/NOPB (2,049 pieces), making it the preferred choice for production applications.
Category B - Enhanced Performance Alternatives:
The AD8648ARUZ and AD8648ARUZ-REEL from Analog Devices provide superior electrical performance with 26x higher gain bandwidth product (24 MHz vs. 1.5 MHz) and 26x faster slew rate (11V/µs vs. 0.42V/µs). These parts are suitable for applications requiring higher-speed signal processing. However, supply current increases from 116µA to 1500µA per channel, requiring power budget reassessment.
The LMR934FVJ-E2 from Rohm Semiconductor offers near-equivalent performance with slightly lower slew rate (0.35V/µs) and gain bandwidth product (1.4 MHz), maintaining the 1.8V minimum supply voltage. Operating temperature range is reduced to -40°C to 85°C.
Parts Not Recommended for Direct Substitution:
The BD12734FVJ-E2, BU7487FV-E2, BU7487SFV-E2, and LMR344FVJ-E2 exhibit significant deviations in critical parameters:
- BD12734FVJ-E2: Reduced output current (12 mA vs. 100 mA), elevated supply current (1200µA), limited operating temperature range (-40°C to 85°C)
- BU7487FV-E2 and BU7487SFV-E2: Minimum supply voltage of 3.0V (incompatible with 1.8V designs), CMOS amplifier type, reduced output current (12 mA), package variant (14-LSSOP)
- LMR344FVJ-E2: Significantly reduced output current (113 mA vs. 100 mA is acceptable, but combined with other parameter deviations), limited operating temperature range (-40°C to 85°C)
Compliance and Certification:
All recommended substitute parts maintain ROHS3 compliance and MSL Level 1 rating. The LMV934MT/NOPB and LMV934MTX/NOPB carry AEC-Q100 automotive qualification, providing additional reliability assurance for mission-critical applications.
Frequently Asked Questions (FAQ)
Q1: Can the LMV934MTX/NOPB directly replace the LMV934IPWR without circuit modifications?
A: Yes. The LMV934MTX/NOPB is electrically and functionally equivalent to the LMV934IPWR. Both devices feature identical slew rate (0.42V/µs), gain bandwidth product (1.5 MHz), input bias current (14 nA vs. 15 nA), and output current capability (100 mA per channel). The 14-TSSOP package pinout is identical. The extended maximum supply voltage (5.5V vs. 5.0V) provides additional design margin without requiring circuit changes.
Q2: What is the primary reason for substituting the LMV934IPWR?
A: The LMV934IPWR is classified as obsolete by Texas Instruments. This status indicates that the manufacturer has discontinued production and will not guarantee future availability. Substitution ensures design continuity and production feasibility for new manufacturing runs and long-term product support.
Q3: Are there performance trade-offs when using the AD8648ARUZ as a substitute?
A: The AD8648ARUZ provides significantly enhanced performance in slew rate (11V/µs vs. 0.42V/µs) and gain bandwidth product (24 MHz vs. 1.5 MHz), making it suitable for higher-speed applications. However, supply current increases substantially from 116µA to 1500µA per channel. This increased power consumption requires verification of power supply capacity and thermal management in the target application. Input bias current is dramatically reduced (0.3 pA vs. 15 nA), which may improve performance in high-impedance signal paths.
Q4: Can the BU7487SFV-E2 be used as a substitute?
A: The BU7487SFV-E2 is not recommended as a direct substitute. While it maintains the 14-pin surface-mount package format, critical parameter deviations exist: minimum supply voltage is 3.0V (incompatible with 1.8V designs), output current is reduced to 12 mA (vs. 100 mA), and the package variant is 14-LSSOP rather than 14-TSSOP. Additionally, it is classified as a CMOS amplifier rather than a general-purpose amplifier type.
Q5: What packaging options are available for the recommended substitutes?
A: The LMV934MT/NOPB is supplied in Bulk packaging, while LMV934MTX/NOPB is supplied without specified packaging designation. The AD8648ARUZ is available in Tube packaging, and AD8648ARUZ-REEL is supplied in Cut Tape (CT) & Digi-Reel® format. All recommended parts maintain the 14-TSSOP (0.173", 4.40mm Width) package case. Packaging selection should align with production assembly requirements and inventory management practices.
Q6: Is the LMR934FVJ-E2 a suitable alternative for cost-sensitive applications?
A: The LMR934FVJ-E2 offers near-equivalent electrical performance with slew rate of 0.35V/µs and gain bandwidth product of 1.4 MHz, closely matching the LMV934IPWR baseline. However, the operating temperature range is limited to -40°C to 85°C (vs. -40°C to 125°C), which may restrict use in high-temperature environments. Supply current is elevated to 250µA per channel. This part is suitable only for applications where the reduced temperature range is acceptable.
Q7: What compliance certifications should be verified for medical or automotive applications?
A: For automotive applications, the LMV934MT/NOPB and LMV934MTX/NOPB carry AEC-Q100 qualification, meeting automotive industry reliability standards. All recommended parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. For medical device applications, additional regulatory documentation and biocompatibility assessments may be required beyond the parameters provided in this reference.
Q8: How does the input bias current difference between LMV934IPWR (15 nA) and LMV934MTX/NOPB (14 nA) affect circuit design?
A: The 1 nanoampere difference is negligible for most general-purpose applications. Input bias current primarily affects high-impedance signal conditioning circuits where bias current-induced offset voltage becomes significant. For impedance levels below 10 MΩ, this difference is typically within acceptable error margins. Circuit simulation or empirical testing is recommended only for precision instrumentation applications operating at impedance levels exceeding 100 MΩ.
Q9: Can multiple substitute parts be mixed within a single design?
A: Mixing substitute parts from different manufacturers within a single design is not recommended. While all recommended parts maintain identical pinout and package configuration, subtle differences in temperature coefficient, frequency response, and noise characteristics may introduce performance inconsistencies across multiple channels. Standardizing on a single substitute part number ensures predictable and repeatable circuit behavior.
Q10: What is the inventory status of recommended substitutes?
A: LMV934MTX/NOPB has the highest inventory availability at 17,700 pieces. LMV934MT/NOPB has 2,049 pieces available. AD8648ARUZ and AD8648ARUZ-REEL each have approximately 3,000-3,563 pieces in stock. LMR934FVJ-E2 has 3,126 pieces available. MCP6424-E/ST has 2,200 pieces in stock. Inventory levels should be verified with suppliers prior to design commitment, as availability may fluctuate based on market demand.
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