LMV344MA Equivalent & Substitute Parts

Part Overview

The LMV344MA is a CMOS 4-circuit operational amplifier in 14-SOIC surface mount packaging, manufactured by Texas Instruments. This device features rail-to-rail output capability with a 1 MHz gain bandwidth product and operates across a 2.7 V to 5.5 V supply range. The LMV344MA is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional compatibility across key electrical parameters including supply voltage range, output type, circuit count, and package form factor.

Key Parameters

Parameter	LMV344MA	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	1	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	0.02	pA
Voltage - Input Offset	700	µV
Current - Supply (x4 Channels)	107	µA
Current - Output / Channel	113	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the LMV344MA is determined by the following critical parameters:

Primary Compatibility Criteria:

Number of Circuits: 4 (quad configuration required)
Output Type: Rail-to-Rail
Package / Case: 14-SOIC or equivalent 14-pin surface mount form factor
Voltage - Supply Span: 2.7 V minimum to 5.5 V maximum
Operating Temperature: -40°C to 125°C minimum range
Mounting Type: Surface Mount

Secondary Performance Parameters:

Slew Rate: 1 V/µs or greater
Gain Bandwidth Product: 1 MHz or greater
Current - Input Bias: 0.02 pA or lower (lower is preferred)
Voltage - Input Offset: 700 µV or lower
Current - Supply: 107 µA per channel or lower (lower is preferred)
Current - Output / Channel: 113 mA or greater

Substitute parts are grouped into two categories: direct replacements with identical electrical specifications and active product alternatives with enhanced or modified performance characteristics. All substitute parts listed maintain the 14-SOIC package footprint and surface mount configuration, ensuring mechanical compatibility with existing PCB designs.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Output Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status	RoHS
LMV344MA	Texas Instruments	CMOS	4	Rail-to-Rail	1	1	0.02	700	107	113	2.7	5.5	-40 to 125	14-SOIC	Obsolete	Non-compliant
LMV344MA/NOPB	Texas Instruments	CMOS	4	Rail-to-Rail	1	1	0.02	700	107	113	2.7	5.5	-40 to 125	14-SOIC	Active	ROHS3 Compliant
AD8544WARZ-R7	Analog Devices Inc.	General Purpose	4	Rail-to-Rail	0.92	1	4	1000	45	30	2.7	5.5	-40 to 125	14-SOIC	Active	ROHS3 Compliant
ADA4891-4ARZ	Analog Devices Inc.	CMOS	4	Rail-to-Rail	210	105	2	2500	4400	125	2.7	5.5	-40 to 125	14-SOIC	Active	ROHS3 Compliant
ADA4891-4ARZ-R7	Analog Devices Inc.	CMOS	4	Rail-to-Rail	210	105	2	2500	4400	125	2.7	5.5	-40 to 125	14-SOIC	Active	ROHS3 Compliant
ADA4891-4ARZ-RL	Analog Devices Inc.	CMOS	4	Rail-to-Rail	210	105	2	2500	4400	125	2.7	5.5	-40 to 125	14-SOIC	Active	ROHS3 Compliant
BU7487F-E2	Rohm Semiconductor	CMOS	4	Rail-to-Rail	10	10	1	1000	6000	12	3	5.5	-40 to 105	14-SOP	Active	ROHS3 Compliant
LMR934F-GE2	Rohm Semiconductor	General Purpose	4	Rail-to-Rail	0.35	1.4	5000	1000	250	90	1.8	5	-40 to 85	14-SOP	Active	ROHS3 Compliant
LMV324BG-13	Diodes Incorporated	General Purpose	4	Rail-to-Rail	1	1	15000	1700	340	90	2.7	5.5	-40 to 125	14-SO	Active	ROHS3 Compliant
LMV324DR2G	onsemi	Voltage Feedback	4	Rail-to-Rail	1	1	1	1700	100	160	2.7	5.5	-40 to 85	14-SOIC	Active	ROHS3 Compliant
LMV824DR2G	onsemi	General Purpose	4	Rail-to-Rail	2	5.6	119000	1000	1000	45	2.7	5.5	-40 to 85	14-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance):

LMV344MA/NOPB is the direct equivalent of the obsolete LMV344MA. This part maintains identical electrical specifications across all parameters including slew rate, gain bandwidth product, input bias current, and output current capability. The primary distinction is product status: LMV344MA/NOPB is active and ROHS3 compliant, whereas the original LMV344MA is obsolete and RoHS non-compliant. For new designs or production continuity, LMV344MA/NOPB is the recommended direct replacement.

Active Product Alternatives (Enhanced Performance):

The ADA4891-4ARZ, ADA4891-4ARZ-R7, and ADA4891-4ARZ-RL series from Analog Devices represent performance-enhanced alternatives. These devices maintain the 4-circuit quad configuration, rail-to-rail output, and 2.7 V to 5.5 V supply range. However, they feature significantly higher slew rate (210 V/µs versus 1 V/µs) and gain bandwidth product (105 MHz versus 1 MHz). These parts are suitable for applications requiring higher bandwidth performance while maintaining supply voltage compatibility. All three variants are ROHS3 compliant and active products.

Functional Equivalents (Modified Specifications):

AD8544WARZ-R7 from Analog Devices provides a general-purpose amplifier alternative with identical 1 MHz gain bandwidth product and 2.7 V to 5.5 V supply range. This part features lower supply current (45 µA versus 107 µA) but reduced output current capability (30 mA versus 113 mA). Selection of this part requires verification that output current requirements do not exceed 30 mA per channel.

LMV324BG-13 from Diodes Incorporated and LMV324DR2G from onsemi both maintain 1 MHz gain bandwidth product and 2.7 V to 5.5 V supply range with identical slew rate. LMV324DR2G offers superior output current capability (160 mA versus 113 mA) but operates only to 85°C maximum temperature. LMV324BG-13 maintains the full -40°C to 125°C temperature range but with reduced output current (90 mA).

LMV824DR2G from onsemi features enhanced slew rate (2 V/µs) and gain bandwidth product (5.6 MHz) with full supply voltage compatibility but operates only to 85°C maximum temperature.

Limited Compatibility Alternatives:

BU7487F-E2 from Rohm Semiconductor and LMR934F-GE2 from Rohm Semiconductor present trade-offs in multiple parameters. BU7487F-E2 requires minimum 3 V supply (versus 2.7 V) and operates only to 105°C. LMR934F-GE2 operates on lower supply voltage (1.8 V minimum) but with reduced maximum temperature (85°C) and significantly lower slew rate (0.35 V/µs). These parts are suitable only for applications with relaxed temperature or supply voltage requirements.

All substitute parts listed are ROHS3 compliant and active products, ensuring regulatory compliance and ongoing manufacturing availability.

Frequently Asked Questions (FAQ)

Q: Can LMV344MA/NOPB be used as a direct replacement for LMV344MA?

A: Yes. LMV344MA/NOPB is electrically identical to LMV344MA across all specified parameters. The primary difference is product status: LMV344MA/NOPB is active and ROHS3 compliant. This is the recommended replacement for obsolete LMV344MA inventory.

Q: What is the key difference between LMV344MA and ADA4891-4ARZ?

A: Both devices maintain 4-circuit quad configuration, rail-to-rail output, and 2.7 V to 5.5 V supply compatibility. The ADA4891-4ARZ features significantly higher slew rate (210 V/µs versus 1 V/µs) and gain bandwidth product (105 MHz versus 1 MHz), making it suitable for higher-frequency applications. However, ADA4891-4ARZ exhibits higher supply current (4.4 mA versus 107 µA per channel).

Q: Can AD8544WARZ-R7 replace LMV344MA in all applications?

A: AD8544WARZ-R7 maintains 1 MHz gain bandwidth product and 2.7 V to 5.5 V supply range, but output current capability is reduced to 30 mA per channel compared to 113 mA for LMV344MA. Substitution is valid only for applications where output current does not exceed 30 mA per channel.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original LMV344MA is RoHS non-compliant, making ROHS3-compliant alternatives necessary for applications subject to RoHS regulations.

Q: What is the operating temperature limitation for LMV324DR2G?

A: LMV324DR2G operates from -40°C to 85°C maximum, compared to -40°C to 125°C for LMV344MA. This part is suitable only for applications where maximum operating temperature does not exceed 85°C.

Q: Can BU7487F-E2 be used as a substitute?

A: BU7487F-E2 requires minimum 3 V supply voltage compared to 2.7 V for LMV344MA and operates only to 105°C maximum temperature. Substitution is valid only for applications with supply voltage of 3 V or higher and maximum operating temperature of 105°C or lower.

Q: What packaging considerations apply to these substitutes?

A: All substitute parts use 14-pin surface mount packages. LMV344MA, LMV344MA/NOPB, AD8544WARZ-R7, ADA4891-4ARZ series, LMV324DR2G, and LMV824DR2G use 14-SOIC (0.154", 3.90mm width) packaging, which is footprint-compatible. BU7487F-E2 and LMR934F-GE2 use 14-SOP (0.173", 4.40mm width) packaging, which has slightly different dimensions but maintains 14-pin configuration. PCB layout verification is required when substituting between SOIC and SOP variants.

Q: Which substitute offers the best low-power performance?

A: AD8544WARZ-R7 provides the lowest supply current at 45 µA per channel (4 channels total) compared to 107 µA for LMV344MA. However, this reduction in supply current is accompanied by reduced output current capability (30 mA versus 113 mA per channel).

Q: Are there inventory considerations for these substitutes?

A: Inventory availability varies by part number and packaging configuration. LMV344MA/NOPB (1900 pcs), ADA4891-4ARZ-R7 (18522 pcs), and LMV324BG-13 (5450 pcs) represent parts with substantial current inventory. Specific availability should be verified with component suppliers for production requirements.

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