NJM3403AM# Equivalent & Substitute Parts

Part Overview

The NJM3403AM# is a general-purpose operational amplifier manufactured by Nisshinbo Micro Devices Inc., configured as a 4-circuit integrated circuit in a 14-DMP surface mount package. This device is currently in active product status with 1105 units in stock. The NJM3403AM# serves applications requiring low-power, general-purpose amplification across industrial and commercial temperature ranges.

Substitute parts become necessary when the NJM3403AM# reaches end-of-life status, when alternative packaging formats are required for manufacturing compatibility, or when design specifications allow for functionally equivalent alternatives from different manufacturers. The substitute parts listed maintain the core operational amplifier functionality while offering variations in electrical performance characteristics and package configurations.

Key Parameters

Parameter	NJM3403AM#	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	1.2	V/µs
Gain Bandwidth Product	1.2	MHz
Current - Input Bias	70	nA
Voltage - Input Offset	2	mV
Current - Supply	3	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	14-SOIC (0.197", 5.00mm Width)	—
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the NJM3403AM# is determined by the following critical parameters:

Primary Substitution Criteria:

Number of circuits: 4 (all substitutes maintain this requirement)
Amplifier type: General Purpose (all substitutes are general-purpose operational amplifiers)
Mounting type: Surface Mount (all substitutes use surface mount technology)
Gain Bandwidth Product: 1.2 MHz (primary electrical performance metric)
Current - Output / Channel: 30 mA minimum (electrical capability requirement)

Secondary Compatibility Parameters:

Voltage - Supply Span: Minimum 4 V to Maximum 36 V (NJM3403AM# range)
Operating Temperature: -40°C to 85°C minimum coverage
Package compatibility: 14-SOIC or 14-DMP configurations

Substitutes are grouped into two categories:

Category A - Direct Electrical Equivalents (1.2 MHz Gain Bandwidth Product): LM2902D, LM2902DR, LM2902DRG3, LM2902NSR, LM2902QDRG4Q1, LM2902QDRQ1

These parts maintain the 1.2 MHz gain bandwidth product specification and support the full 4 V to 36 V supply range of the NJM3403AM#. Variations exist in slew rate (0.3 to 0.5 V/µs versus 1.2 V/µs), input bias current (20 nA versus 70 nA), and supply current (1 to 1.4 mA versus 3 mA).

Category B - Functional Alternatives (Different Gain Bandwidth Product): MC3403D, MC3403DR, MC3403NSR, TL3474ACD

These parts provide general-purpose 4-circuit amplification but with different electrical performance. MC3403 variants operate at 1 MHz gain bandwidth product with restricted supply voltage ranges (3 to 36 V or 5 to 30 V) and narrower operating temperature ranges (0°C to 70°C). TL3474ACD operates at 4 MHz gain bandwidth product with enhanced slew rate (13 V/µs) and higher output current capability (34 mA).

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
NJM3403AM#	Nisshinbo	1.2	1.2	70	2	3	30	4	36	-40 to 85	14-DMP	Active
LM2902D	onsemi	0.5	1.2	20	3	1.4	30	3	26	-40 to 125	14-SOIC	Obsolete
LM2902DR	Rohm	0.3	1.2	20	1	1	30	3	32	-40 to 125	14-SOIC	Obsolete
LM2902DRG3	Texas Instruments	0.5	1.2	20	3	1.4	30	3	26	-40 to 125	14-SOIC	Last Time Buy
LM2902NSR	Texas Instruments	0.5	1.2	20	3	1.4	30	3	26	-40 to 125	14-SO	Last Time Buy
LM2902QDRG4Q1	Texas Instruments	0.5	1.2	20	3	1.4	60	3	26	-40 to 125	14-SOIC	Last Time Buy
LM2902QDRQ1	Texas Instruments	0.5	1.2	20	3	1.4	60	3	26	-40 to 125	14-SOIC	Active
MC3403D	STMicroelectronics	0.5	1	40	1	2.8	30	3	36	0 to 70	14-SOIC	Obsolete
MC3403DR	Texas Instruments	0.6	1	200	2	2.8	30	5	30	0 to 70	14-SOIC	Active
MC3403NSR	Texas Instruments	0.6	1	200	2	2.8	30	5	30	0 to 70	14-SO	Last Time Buy
TL3474ACD	Texas Instruments	13	4	100	1	3.5	34	4	36	0 to 70	14-SOIC	Obsolete

Engineering Selection Recommendations

For Direct Substitution (Equivalent Electrical Performance):

LM2902QDRQ1 is the preferred substitute when the NJM3403AM# becomes unavailable. This part maintains the 1.2 MHz gain bandwidth product, supports the required 4 V to 36 V supply range, and is currently in active product status. The LM2902QDRQ1 carries AEC-Q100 automotive qualification and ROHS3 compliance. The higher output current capability (60 mA versus 30 mA per channel) provides additional design margin. Operating temperature range extends to -40°C to 125°C, exceeding the NJM3403AM# specification.

LM2902DRG3 and LM2902NSR are secondary alternatives with identical electrical specifications to LM2902QDRQ1 but designated as Last Time Buy status. These parts are suitable for applications where automotive qualification is not required.

For Applications Requiring Extended Temperature Range:

LM2902D, LM2902DR, and LM2902DRG3 all support -40°C to 125°C operating temperature, compared to the NJM3403AM# range of -40°C to 85°C. These parts are suitable for designs requiring extended high-temperature operation.

For Applications with Reduced Supply Voltage Requirements:

All LM2902 variants operate at minimum 3 V supply voltage, compared to the NJM3403AM# minimum of 4 V. This allows operation in lower-voltage systems.

For Applications Requiring Enhanced Performance:

TL3474ACD provides significantly higher slew rate (13 V/µs versus 1.2 V/µs) and gain bandwidth product (4 MHz versus 1.2 MHz). This part is suitable for applications requiring faster transient response and higher frequency operation. However, TL3474ACD is designated as obsolete and has a narrower operating temperature range (0°C to 70°C).

For Applications with Automotive Requirements:

LM2902QDRG4Q1 and LM2902QDRQ1 carry AEC-Q100 qualification and are suitable for automotive applications. Both parts maintain 1.2 MHz gain bandwidth product and support the full supply voltage range.

Compliance Considerations:

The NJM3403AM# is RoHS Compliant with MSL 1 (Unlimited). All recommended LM2902 substitutes are ROHS3 Compliant with MSL 1 (Unlimited), ensuring compatibility with RoHS requirements. MC3403 variants are ROHS3 Compliant but have restricted operating temperature ranges unsuitable for the NJM3403AM# application envelope.

Frequently Asked Questions (FAQ)

Q: Can LM2902D be used as a direct replacement for NJM3403AM#?

A: LM2902D maintains the 1.2 MHz gain bandwidth product and 4-circuit configuration. However, LM2902D is designated as obsolete and has a maximum supply voltage of 26 V compared to the NJM3403AM# maximum of 36 V. If the application operates within 3 V to 26 V supply range and -40°C to 125°C temperature range, LM2902D is functionally compatible. For new designs, LM2902QDRQ1 is preferred due to active product status.

Q: What is the difference between LM2902QDRG4Q1 and LM2902QDRQ1?

A: Both parts are manufactured by Texas Instruments and maintain identical electrical specifications: 1.2 MHz gain bandwidth product, 0.5 V/µs slew rate, 60 mA output current per channel, and 3 V to 26 V supply range. LM2902QDRG4Q1 is packaged in Tape & Reel (TR) format and designated as Last Time Buy. LM2902QDRQ1 is packaged in Cut Tape (CT) & Digi-Reel® format and is currently in active product status. Both carry AEC-Q100 automotive qualification.

Q: Why does the NJM3403AM# have higher slew rate (1.2 V/µs) than most LM2902 variants (0.5 V/µs)?

A: Slew rate is a design characteristic determined by the internal circuit topology and compensation network. The NJM3403AM# is designed for faster transient response, while LM2902 variants prioritize lower power consumption and lower supply current (1 to 1.4 mA versus 3 mA). Both designs maintain the same 1.2 MHz gain bandwidth product through different internal architectures.

Q: Can MC3403DR replace NJM3403AM#?

A: MC3403DR is not a direct substitute. While both are 4-circuit general-purpose operational amplifiers, MC3403DR operates at 1 MHz gain bandwidth product (versus 1.2 MHz), has a minimum supply voltage of 5 V (versus 4 V), and a maximum supply voltage of 30 V (versus 36 V). Additionally, MC3403DR has a narrower operating temperature range of 0°C to 70°C compared to NJM3403AM# range of -40°C to 85°C. MC3403DR is suitable only for applications that operate within these restricted parameters.

Q: What is the significance of AEC-Q100 qualification on LM2902QDRG4Q1 and LM2902QDRQ1?

A: AEC-Q100 qualification indicates that these parts meet automotive industry reliability and quality standards established by the Automotive Electronics Council. This qualification is required for automotive applications and demonstrates compliance with stress testing, temperature cycling, and failure rate requirements. If the application is non-automotive, AEC-Q100 qualification is not necessary but provides additional assurance of product reliability.

Q: Are there package compatibility issues between NJM3403AM# (14-DMP) and LM2902 variants (14-SOIC)?

A: The NJM3403AM# uses a 14-DMP package (0.197", 5.00mm width), while most LM2902 variants use 14-SOIC packages (0.154", 3.90mm width). These are physically different packages with different pin spacing and footprints. PCB layout modifications are required for substitution. LM2902NSR uses a 14-SO package (0.209", 5.30mm width), which is also different from the NJM3403AM# package. Verify PCB footprint compatibility before substitution.

Q: Why is TL3474ACD listed as a substitute if it has different electrical specifications?

A: TL3474ACD is listed as a functional alternative for applications where enhanced performance is beneficial. The 4 MHz gain bandwidth product and 13 V/µs slew rate provide significantly faster operation than the NJM3403AM#. However, TL3474ACD is designated as obsolete and has a narrower operating temperature range (0°C to 70°C). This part is suitable only for applications that do not require the full -40°C to 85°C temperature range of the NJM3403AM#.

Q: What does "Last Time Buy" status mean for LM2902DRG3 and LM2902NSR?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life for these parts. Customers have a final opportunity to purchase inventory before production ceases. After the Last Time Buy date, these parts will no longer be available from the manufacturer. For new designs or long-term production requirements, select parts with Active product status such as LM2902QDRQ1.

Q: Is RoHS compliance important for selecting a substitute?

A: RoHS compliance is critical for applications subject to European Union Restriction of Hazardous Substances regulations. The NJM3403AM# is RoHS Compliant. All recommended LM2902 substitutes are ROHS3 Compliant, ensuring regulatory compliance. MC3403 variants are also ROHS3 Compliant. Verify RoHS requirements for your specific application and region before finalizing part selection.

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