LMV321QDBVRQ1 Equivalent & Substitute Parts

Part Overview

The LMV321QDBVRQ1 is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This device features rail-to-rail output capability and is qualified to AEC-Q100 automotive standards with an operating temperature range of -40°C to 125°C. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity. Substitute parts maintain functional equivalence through matching electrical characteristics while offering active product status and improved availability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	1	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	15	nA
Voltage - Input Offset	1.7	mV
Current - Supply	130	µA
Current - Output / Channel	160	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Grade	Automotive	—
Qualification	AEC-Q100	—
Mounting Type	Surface Mount	—
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LMV321QDBVRQ1 are organized into two primary categories based on electrical and mechanical compatibility:

Category 1: Direct Electrical Equivalents (LMV321 Series) Parts LMV321M5/NOPB, LMV321M5X/NOPB, LMV321M7/NOPB, LMV321M7X/NOPB, and LMV321Q1M5/NOPB maintain identical electrical specifications including slew rate (1 V/µs), gain bandwidth product (1 MHz), input bias current (15 nA), input offset voltage (1.7 mV), supply current (130 µA), and output current (160 mA). These parts differ in package configuration (SOT-23-5 versus SC-70-5) and product status (active versus obsolete). The LMV321Q1M5/NOPB variant includes automotive qualification (AEC-Q100) and extended temperature range (-40°C to 125°C), matching the original part's grade requirements.

Category 2: Low-Power Alternatives (LPV321 Series) Parts LPV321M5/NOPB, LPV321M5X/NOPB, LPV321M7/NOPB, and LPV321M7X/NOPB provide functional substitution with reduced power consumption characteristics. These devices feature lower slew rate (0.1 V/µs), reduced gain bandwidth product (152 kHz), significantly lower input bias current (2 nA), and lower supply current (9 µA). These parts are suitable for applications where power efficiency is prioritized over bandwidth performance.

Category 3: Cross-Manufacturer Alternative (AZV321 Series) The AZV321KTR-G1 from Diodes Incorporated provides electrical equivalence to the LMV321QDBVRQ1 with matching slew rate (1 V/µs), gain bandwidth product (1 MHz), input offset voltage (1.7 mV), supply current (130 µA), and output current (160 mA). This part operates within the same supply voltage range (2.7 V to 5.5 V) and is housed in SOT-23-5 packaging. The primary distinction is higher input bias current (250 nA versus 15 nA) and reduced operating temperature range (-40°C to 85°C).

Key Substitution Parameters:

Slew Rate: 1 V/µs (LMV321 and AZV321 series) or 0.1 V/µs (LPV321 series)
Gain Bandwidth Product: 1 MHz (LMV321 and AZV321 series) or 152 kHz (LPV321 series)
Supply Voltage Range: 2.7 V to 5.5 V (LMV321 and AZV321) or 2.7 V to 5 V (LPV321)
Package Type: SOT-23-5 or SC-70-5
Operating Temperature: -40°C to 125°C (LMV321Q1M5/NOPB only) or -40°C to 85°C (all others)
Automotive Qualification: AEC-Q100 (LMV321QDBVRQ1 and LMV321Q1M5/NOPB only)

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (µA)	Output Current (mA)	Temp Range (°C)	Package	AEC-Q100
LMV321QDBVRQ1	Texas Instruments	Obsolete	1	1	15	1.7	130	160	-40 to 125	SOT-23-5	Yes
LMV321M5/NOPB	Texas Instruments	Active	1	1	15	1.7	130	160	-40 to 85	SOT-23-5	No
LMV321M5X/NOPB	Texas Instruments	Active	1	1	15	1.7	130	—	-40 to 85	SOT-23-5	No
LMV321M7/NOPB	Texas Instruments	Active	1	1	15	1.7	130	160	-40 to 85	SC-70-5	No
LMV321M7X/NOPB	Texas Instruments	Active	1	1	15	1.7	130	—	-40 to 85	SC-70-5	No
LMV321Q1M5/NOPB	Texas Instruments	Active	1	1	15	1.7	130	—	-40 to 125	SOT-23-5	Yes
LPV321M5/NOPB	Texas Instruments	Active	0.1	0.152	2	1.5	9	—	-40 to 85	SOT-23-5	No
LPV321M5X/NOPB	National Semiconductor	Active	0.1	0.152	2	1.5	9	—	-40 to 85	SOT-23-5	No
LPV321M7/NOPB	National Semiconductor	Active	0.1	0.152	2	1.5	9	—	-40 to 85	SC-70-5	No
LPV321M7X/NOPB	National Semiconductor	Active	0.1	0.152	2	1.5	9	—	-40 to 85	SC-70-5	No
AZV321KTR-G1	Diodes Incorporated	Active	1	1	250	1.7	130	160	-40 to 85	SOT-23-5	No

Engineering Selection Recommendations

For Automotive Applications with Extended Temperature Requirements: The LMV321Q1M5/NOPB is the primary recommended substitute. This part maintains AEC-Q100 qualification and the extended operating temperature range (-40°C to 125°C) of the original LMV321QDBVRQ1. Electrical specifications are identical, including slew rate, gain bandwidth product, input bias current, and output current. The part is currently in active production status with adequate inventory (4,094 units). Package compatibility is maintained with SOT-23-5 configuration.

For Standard Industrial Applications without Automotive Requirements: The LMV321M5/NOPB or LMV321M5X/NOPB provide direct electrical equivalence with active product status and high inventory availability (7,100 and 65,100 units respectively). These parts maintain identical electrical performance but operate within the -40°C to 85°C temperature range. The LMV321M5X/NOPB variant offers superior availability and is packaged in Tape & Reel format.

For Compact PCB Layouts: The LMV321M7/NOPB or LMV321M7X/NOPB provide identical electrical specifications in the smaller SC-70-5 package (5-TSSOP configuration). These parts are suitable for space-constrained applications while maintaining the same electrical performance as the SOT-23-5 variants.

For Power-Constrained Applications: The LPV321M5/NOPB or LPV321M5X/NOPB are appropriate when reduced power consumption is a design requirement. These parts operate at 9 µA supply current compared to 130 µA for the LMV321 series. However, the reduced slew rate (0.1 V/µs) and lower gain bandwidth product (152 kHz) limit applicability to low-frequency signal conditioning circuits.

For Cross-Manufacturer Sourcing: The AZV321KTR-G1 from Diodes Incorporated provides an alternative source with matching electrical performance in slew rate, gain bandwidth product, and output current. This part is suitable for applications where supply chain diversification is required. The higher input bias current (250 nA) may require circuit design consideration in precision applications.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level remains at MSL 1 (unlimited) for all LMV321 and LPV321 variants. The AZV321KTR-G1 has MSL 3 (168 hours), requiring controlled storage conditions.

Frequently Asked Questions (FAQ)

Q1: Can LMV321M5/NOPB directly replace LMV321QDBVRQ1 in automotive applications?

The LMV321M5/NOPB provides electrical equivalence but lacks AEC-Q100 qualification and operates only to 85°C maximum temperature. For automotive applications requiring AEC-Q100 certification and extended temperature range, use LMV321Q1M5/NOPB instead.

Q2: What is the difference between LMV321M5/NOPB and LMV321M5X/NOPB?

Both parts have identical electrical specifications and SOT-23-5 packaging. The primary difference is packaging format: LMV321M5/NOPB is supplied in Cut Tape (CT) & Digi-Reel format, while LMV321M5X/NOPB is supplied in Tape & Reel (TR) format. The LMV321M5X/NOPB variant has significantly higher inventory availability (65,100 units).

Q3: Can LPV321 series parts substitute for LMV321QDBVRQ1?

LPV321 series parts provide functional substitution only for applications where reduced bandwidth and slew rate are acceptable. The LPV321 series operates at 0.1 V/µs slew rate and 152 kHz gain bandwidth product compared to 1 V/µs and 1 MHz for the LMV321 series. These parts are suitable for low-frequency signal conditioning but not for high-speed applications.

Q4: What are the package differences between SOT-23-5 and SC-70-5?

SOT-23-5 (SC-74A, SOT-753) and SC-70-5 (5-TSSOP, SOT-353) are both surface mount packages with identical pin counts and electrical compatibility. SC-70-5 is physically smaller, making it suitable for space-constrained PCB layouts. Pin assignments and electrical function remain identical between package types.

Q5: Is AZV321KTR-G1 suitable for precision analog circuits?

The AZV321KTR-G1 has input bias current of 250 nA compared to 15 nA for the LMV321QDBVRQ1. This 16.7× higher bias current may introduce additional offset errors in precision circuits. Evaluate circuit-specific requirements before substitution.

Q6: What is the significance of MSL rating differences?

LMV321 and LPV321 variants have MSL 1 (unlimited moisture sensitivity), allowing indefinite storage without desiccant. The AZV321KTR-G1 has MSL 3 (168 hours), requiring controlled humidity storage and baking procedures before reflow soldering if storage exceeds 168 hours at 30°C/60% RH.

Q7: Can I use LMV321M7/NOPB in place of LMV321QDBVRQ1 for PCB space savings?

Yes, LMV321M7/NOPB provides identical electrical specifications in the smaller SC-70-5 package. Verify PCB layout compatibility with the 5-TSSOP footprint before design implementation. All electrical parameters remain equivalent.

Q8: Which substitute part has the best inventory availability?

LMV321M5X/NOPB has the highest inventory availability at 65,100 units in stock. This part provides active product status, identical electrical specifications to the original part, and Tape & Reel packaging suitable for automated assembly.

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