LMV797MMX Equivalent & Substitute Parts

Part Overview

The LMV797MMX is a general-purpose operational amplifier manufactured by Texas Instruments, featuring dual circuits in an 8-VSSOP package. This device is classified as obsolete, though functionally equivalent active alternatives are available. The LMV797MMX operates across a 1.8 V to 5.5 V supply range with rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications.

Due to its obsolete product status, sourcing new original inventory of the LMV797MMX presents supply chain challenges. Identifying equivalent and substitute parts ensures design continuity and maintains access to functionally compatible components for production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	11.5	V/µs
Gain Bandwidth Product	17	MHz
Current - Input Bias	0.1	pA
Voltage - Input Offset	100	µV
Current - Supply (x2 Channels)	1.3	mA
Current - Output / Channel	60	mA
Voltage - Supply Span (Min)	1.8	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitute parts for the LMV797MMX are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Dual-circuit configuration (2 circuits per package)
Rail-to-rail output capability
Supply voltage range: 1.8 V to 5.5 V minimum overlap
Surface mount 8-pin package (8-VSSOP, 8-MSOP, or 8-MiniSO)
Operating temperature range: minimum -40°C to 125°C coverage

Secondary Performance Parameters:

Slew rate ≥ 11.5 V/µs (for signal fidelity in time-sensitive applications)
Gain bandwidth product ≥ 17 MHz (for frequency response compatibility)
Input bias current ≤ 0.1 pA (for high-impedance source compatibility)
Output current per channel ≥ 60 mA (for load-driving capability)

Substitutes are classified into two categories:

Category A - Direct Equivalents (Identical Electrical Performance): Parts that maintain all key electrical specifications within the LMV797MMX envelope, differing only in product status or packaging format.

Category B - Functional Alternatives (Performance Trade-offs): Parts that meet core substitution criteria but exhibit variations in specific parameters. These alternatives are suitable when application requirements permit relaxed performance specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	RoHS Status
LMV797MMX	Texas Instruments	Obsolete	General Purpose	11.5	17	1.3	60	-40 to 125	Non-compliant
LMV797MMX/NOPB	Texas Instruments	Active	General Purpose	11.5	17	1.3	60	-40 to 125	ROHS3 Compliant
MCP6422T-E/MS	Microchip Technology	Active	General Purpose	0.05	0.09	0.0044	22	-40 to 125	ROHS3 Compliant
NCV20032DMR2G	onsemi	Active	General Purpose	8	7	0.275	14	-40 to 125	ROHS3 Compliant
LTC6087CMS8#TRPBF	Analog Devices Inc.	Active	CMOS	7.2	14	1.05	45	-40 to 85	ROHS3 Compliant
BU7266FVM-TR	Rohm Semiconductor	Active	CMOS	0.0024	0.004	0.0007	4	-40 to 85	ROHS3 Compliant
BU7486FVM-TR	Rohm Semiconductor	Active	CMOS	10	10	6	12	-40 to 105	ROHS3 Compliant
OA2MPA34S	STMicroelectronics	Active	CMOS	0.06	0.15	0.01	56	-40 to 125	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended Primary Choice):

LMV797MMX/NOPB is the optimal substitute for the obsolete LMV797MMX. This part is manufactured by Texas Instruments under the same base product number and maintains identical electrical specifications. The primary distinction is product status (active versus obsolete) and RoHS3 compliance. The /NOPB suffix indicates lead-free, halogen-free packaging in Tape & Reel format. Current inventory of 28,100 units ensures supply availability. This part requires no circuit redesign and provides direct functional equivalence.

Tier 2 - Active Alternatives with Full Temperature Range Coverage:

NCV20032DMR2G (onsemi) and OA2MPA34S (STMicroelectronics) both support the complete -40°C to 125°C operating temperature range required by the LMV797MMX. Both are RoHS3 compliant and available in active product status.

NCV20032DMR2G exhibits reduced slew rate (8 V/µs versus 11.5 V/µs) and lower gain bandwidth product (7 MHz versus 17 MHz), resulting in diminished high-frequency performance. Output current per channel is reduced to 14 mA. This part is suitable for applications where bandwidth and slew rate requirements are relaxed.

OA2MPA34S provides superior output current capability (56 mA per channel) and maintains the full temperature range. However, slew rate (0.06 V/µs) and gain bandwidth product (150 kHz) are significantly reduced, limiting applicability to low-frequency signal processing.

Tier 3 - Conditional Alternatives (Temperature-Limited):

LTC6087CMS8#TRPBF (Analog Devices Inc.) and BU7486FVM-TR (Rohm Semiconductor) both restrict operating temperature to -40°C to 85°C or -40°C to 105°C respectively, falling short of the LMV797MMX's 125°C maximum. These parts are suitable only for applications where the upper temperature limit does not exceed their specified range.

LTC6087CMS8#TRPBF provides slew rate of 7.2 V/µs and gain bandwidth product of 14 MHz, approaching LMV797MMX performance. Output current per channel is 45 mA.

BU7486FVM-TR offers slew rate of 10 V/µs and gain bandwidth product of 10 MHz, with output current limited to 12 mA per channel.

Tier 4 - Ultra-Low-Power Alternatives (Performance Trade-off):

BU7266FVM-TR and BU7266SFVM-TR (Rohm Semiconductor) are optimized for ultra-low-power operation with supply current of 700 nA. These parts exhibit severely reduced performance: slew rate of 0.0024 V/µs and gain bandwidth product of 4 kHz. Output current per channel is limited to 4 mA. These alternatives are applicable only to battery-powered or energy-harvesting applications where performance constraints are acceptable.

Compliance Considerations:

All recommended substitutes except the LMV797MMX itself are RoHS3 compliant. If RoHS compliance is a design requirement, LMV797MMX/NOPB is the mandatory choice. All substitutes maintain REACH unaffected status and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q1: Can LMV797MMX/NOPB be used as a direct drop-in replacement for LMV797MMX?

A: Yes. LMV797MMX/NOPB is electrically and mechanically identical to LMV797MMX. Both parts feature identical slew rate (11.5 V/µs), gain bandwidth product (17 MHz), supply current (1.3 mA per dual channels), and output current (60 mA per channel). The primary differences are product status (active versus obsolete) and RoHS3 compliance. No circuit modifications are required. The /NOPB designation indicates lead-free, halogen-free packaging in Tape & Reel format.

Q2: What are the key performance trade-offs when substituting with MCP6422T-E/MS?

A: MCP6422T-E/MS is optimized for ultra-low-power operation. Supply current is reduced to 4.4 µA per dual channels (versus 1.3 mA for LMV797MMX), representing a 295× reduction. However, slew rate drops to 0.05 V/µs (230× slower) and gain bandwidth product reduces to 90 kHz (189× lower). Output current per channel is limited to 22 mA (versus 60 mA). This substitute is suitable for battery-powered applications where bandwidth and slew rate requirements are minimal. Full -40°C to 125°C temperature range is maintained.

Q3: Is NCV20032DMR2G suitable for high-frequency signal processing applications?

A: NCV20032DMR2G is not recommended for high-frequency applications. Gain bandwidth product is 7 MHz, representing a 59% reduction compared to LMV797MMX's 17 MHz. Slew rate is 8 V/µs versus 11.5 V/µs. These reductions limit frequency response and signal fidelity in time-sensitive circuits. This part is suitable for low-to-mid-frequency analog signal conditioning where bandwidth below 7 MHz is acceptable.

Q4: Why do BU7266FVM-TR and BU7266SFVM-TR have such low slew rates?

A: BU7266 series parts are CMOS amplifiers optimized for ultra-low quiescent current (700 nA). The extremely low slew rate (0.0024 V/µs) and gain bandwidth product (4 kHz) are inherent design trade-offs of this optimization. These parts are intended for energy-harvesting and battery-powered applications where power consumption is the primary design constraint. They are unsuitable for applications requiring fast signal transitions or high-frequency operation.

Q5: What is the significance of the temperature range difference between LTC6087CMS8#TRPBF and LMV797MMX?

A: LTC6087CMS8#TRPBF operates from -40°C to 85°C, whereas LMV797MMX operates from -40°C to 125°C. This 40°C difference in maximum operating temperature restricts LTC6087CMS8#TRPBF to applications where ambient or junction temperature does not exceed 85°C. Industrial and automotive applications often require 125°C capability. Substitution with LTC6087CMS8#TRPBF is valid only when application thermal requirements are confirmed to remain below 85°C.

Q6: Can OA2MPA34S replace LMV797MMX in a high-current output stage?

A: OA2MPA34S provides 56 mA output current per channel, exceeding LMV797MMX's 60 mA specification by 93%. However, slew rate is reduced to 0.06 V/µs (192× slower) and gain bandwidth product is 150 kHz (113× lower). OA2MPA34S is suitable for high-current, low-frequency applications. For applications requiring both high output current and high-frequency performance, OA2MPA34S is not recommended.

Q7: What packaging considerations apply when substituting between different 8-pin variants?

A: LMV797MMX uses 8-VSSOP packaging. Substitute parts are available in 8-VSSOP, 8-MSOP, and 8-MiniSO packages. All three packages are surface-mount, 8-pin configurations with identical pinout and electrical function. Physical dimensions vary slightly: 8-MSOP is 0.118" × 3.00mm width, 8-MiniSO is 0.118" × 3.00mm width. PCB layout and reflow profiles may require minor adjustment, but electrical compatibility is maintained across all three package types.

Q8: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are RoHS3 compliant. The original LMV797MMX is RoHS non-compliant. If RoHS3 compliance is a design requirement, LMV797MMX/NOPB is the only direct equivalent that meets this criterion while maintaining identical electrical performance.

Q9: Which substitute part provides the closest performance match to LMV797MMX?

A: LMV797MMX/NOPB provides exact performance equivalence. If LMV797MMX/NOPB is unavailable, LTC6087CMS8#TRPBF offers the closest performance match with slew rate of 7.2 V/µs (63% of LMV797MMX) and gain bandwidth product of 14 MHz (82% of LMV797MMX). The primary limitation is operating temperature range restricted to -40°C to 85°C.

Q10: What is the inventory status of substitute parts?

A: LMV797MMX/NOPB has the highest inventory availability at 28,100 units. LTC6087CMS8#TRPBF has 12,800 units. NCV20032DMR2G has 1,540 units. BU7266SFVM-TR has 6,128 units. BU7486FVM-TR has 4,095 units. MCP6422T-E/MS has 3,621 units. OA2MPA34S has 873 units. Inventory levels should be verified with suppliers before finalizing procurement decisions.

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