LM2902DG4 Equivalent & Substitute Parts

Part Overview

The LM2902DG4 is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SOIC surface mount package. This part is classified as obsolete, though 1043 units remain in current inventory. The LM2902DG4 operates across a wide supply voltage range of 3V to 26V and supports operating temperatures from -40°C to 125°C, making it suitable for industrial and extended-temperature applications.

Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, long-term production support, and supply chain reliability. Substitute parts must maintain functional compatibility while meeting the same electrical specifications and package requirements.

Key Parameters

Parameter	LM2902DG4 Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	0.5	V/µs
Gain Bandwidth Product	1.2	MHz
Current - Input Bias	20	nA
Voltage - Input Offset	3	mV
Current - Supply (x4 Channels)	1.4	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	26	V
Operating Temperature	-40 to 125	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LM2902DG4 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Number of circuits: 4 (mandatory)
Package type: 14-SOIC surface mount (mandatory)
Gain bandwidth product: 1.2 MHz or compatible
Supply voltage range: minimum 3V to 26V or higher
Operating temperature range: -40°C to 125°C or compatible
Output current per channel: 30 mA or greater

Substitution Categories:

Category 1: Direct Functional Equivalents (Active Status) Parts that maintain the LM2902DG4 electrical specifications with active product status and improved availability. These include LM2902M/NOPB, LM2902MX/NOPB, and LM324 series variants. These parts operate within the same supply voltage range and temperature specifications, with comparable or superior electrical performance.

Category 2: Extended Supply Voltage Range Substitutes Parts that exceed the original 26V maximum supply specification, offering 32V maximum capability. These include LM2902DR (Rohm Semiconductor) and LP2902M/NOPB variants, providing additional design margin for higher voltage applications.

Category 3: Low-Power Alternatives LP2902M/NOPB and LP2902MX/NOPB offer significantly reduced supply current (85µA versus 1.4mA) and lower output current capability (10mA versus 30mA per channel), suitable only for applications with relaxed current requirements.

Category 4: Industrial Temperature Range Variants LM2902VDR2G (onsemi) maintains the full -40°C to 125°C operating range with active product status and high inventory availability.

All substitute parts listed maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status, ensuring regulatory compatibility with the original part.

Parameter Comparison

Parameter	LM2902DG4	LM2902DR	LM2902M/NOPB	LM2902MX/NOPB	LM324AM/NOPB	LM324AMX/NOPB	LP2902M/NOPB	LM2902VDR2G
Manufacturer	Texas Instruments	Rohm Semiconductor	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	onsemi
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active
Number of Circuits	4	4	4	4	4	4	4	4
Slew Rate (V/µs)	0.5	0.3	—	—	—	—	0.05	—
Gain Bandwidth Product (MHz)	1.2	1.2	1	1	1	1	0.1	1
Current - Input Bias (nA)	20	20	45	45	45	45	2	90
Voltage - Input Offset (mV)	3	1	2	2	2	2	2	2
Current - Supply (mA)	1.4	1	1.5	1.5	1.5	1.5	0.085	—
Current - Output / Channel (mA)	30	30	40	40	40	40	10	40
Voltage - Supply Span Min (V)	3	3	3	3	3	3	3	3
Voltage - Supply Span Max (V)	26	32	32	32	32	32	26	32
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 85	-40 to 85	0 to 70	0 to 70	-40 to 85	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	1043 Pcs	90223 Pcs	2640 Pcs	1499 Pcs	105684 Pcs	36756 Pcs	747 Pcs	45400 Pcs

Engineering Selection Recommendations

For Full Temperature Range Applications (-40°C to 125°C):

Select LM2902VDR2G (onsemi) as the primary substitute. This part maintains the complete operating temperature range of the LM2902DG4, extends the maximum supply voltage to 32V, and offers the highest inventory availability (45400 units). Product status is active, ensuring long-term supply continuity. Electrical specifications are compatible with the original part across all critical parameters.

Alternatively, LM2902DR (Rohm Semiconductor) provides equivalent temperature range coverage and maintains the original 1.2 MHz gain bandwidth product specification. However, inventory is lower (90223 units) and product status is obsolete.

For Standard Industrial Temperature Range (0°C to 70°C):

LM324AM/NOPB and LM324AMX/NOPB are suitable substitutes with significantly higher inventory availability (105684 and 36756 units respectively) and active product status. These parts operate within a narrower temperature range but are fully compatible for applications not requiring extended low-temperature operation. Output current capability is improved to 40mA per channel.

For Extended Supply Voltage Applications (>26V):

LM2902M/NOPB, LM2902MX/NOPB, LM324AM/NOPB, LM324AMX/NOPB, and LM2902VDR2G all support 32V maximum supply voltage, providing additional design margin compared to the original 26V specification.

For Low-Power Applications:

LP2902M/NOPB and LP2902MX/NOPB reduce supply current to 85µA and output current to 10mA per channel. These parts are suitable only for applications with relaxed current requirements and lower bandwidth demands (100 kHz gain bandwidth product). Operating temperature range extends to -40°C to 85°C.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. No additional regulatory assessment is required for direct substitution in existing designs.

Frequently Asked Questions (FAQ)

Q: Can LM324 series parts directly replace the LM2902DG4?

A: LM324AM/NOPB and LM324AMX/NOPB are functionally compatible substitutes in the 14-SOIC package with identical circuit count (4 circuits) and comparable electrical specifications. However, the operating temperature range is limited to 0°C to 70°C, which is narrower than the LM2902DG4 specification of -40°C to 125°C. These parts are suitable only for applications within the 0°C to 70°C range. For full temperature range compatibility, select LM2902VDR2G or LM2902DR instead.

Q: What is the difference between LM2902M/NOPB and LM2902MX/NOPB?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications and active product status. The primary difference is packaging: LM2902M/NOPB is supplied in Tube packaging, while LM2902MX/NOPB is supplied in Cut Tape (CT) & Digi-Reel format. Electrical performance and compatibility are identical. Select based on your assembly process requirements.

Q: Why does LP2902M/NOPB have lower supply current than the LM2902DG4?

A: LP2902M/NOPB is a low-power variant with significantly reduced bandwidth (100 kHz versus 1.2 MHz) and lower output current capability (10mA versus 30mA per channel). The reduced supply current (85µA versus 1.4mA) is a direct result of these design trade-offs. This part is suitable only for applications with relaxed bandwidth and current requirements.

Q: Is the LM2902DR from Rohm Semiconductor a direct equivalent?

A: LM2902DR is functionally compatible with identical circuit count, package type, and gain bandwidth product (1.2 MHz). It extends the maximum supply voltage to 32V and maintains the full -40°C to 125°C operating temperature range. However, product status is obsolete. For new designs, LM2902VDR2G (onsemi) is preferred due to active product status and higher inventory availability.

Q: Can I use LM2902VDR2G in place of LM2902DG4 without circuit modifications?

A: Yes. LM2902VDR2G is pin-compatible in the 14-SOIC package and maintains electrical compatibility across all critical parameters: 4-circuit configuration, 1 MHz gain bandwidth product, 3V to 32V supply range, and -40°C to 125°C operating temperature. No circuit modifications are required. The extended 32V maximum supply voltage provides additional design margin.

Q: What is the impact of different input bias current specifications?

A: Input bias current ranges from 2 nA (LP2902M/NOPB) to 90 nA (LM2902VDR2G). For most general-purpose applications, these differences are negligible. High-impedance input circuits (>1 MΩ) may require consideration of input bias current effects. The LM2902DG4 specification of 20 nA is mid-range among available substitutes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. No additional environmental or regulatory assessment is required for direct substitution.

Q: Which substitute offers the best long-term supply availability?

A: LM324AM/NOPB and LM324AMX/NOPB offer the highest inventory levels (105684 and 36756 units respectively) with active product status. For full temperature range requirements, LM2902VDR2G (45400 units, active status) is the recommended choice. Both options provide strong supply continuity for production planning.

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