LM2904DG4 Equivalent & Substitute Parts

Part Overview

The LM2904DG4 is a general-purpose operational amplifier featuring two independent circuits in an 8-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as obsolete, indicating it has been discontinued and is no longer recommended for new designs. The LM2904DG4 operates across a wide supply voltage range of 3V to 26V with a gain bandwidth product of 700 kHz and a slew rate of 0.3V/µs, making it suitable for legacy applications and maintenance scenarios. Identifying equivalent and substitute parts is essential for design continuity, procurement flexibility, and long-term product support when the original part becomes unavailable.

Key Parameters

Parameter	LM2904DG4 Value	Unit
Manufacturer	Texas Instruments	—
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Slew Rate	0.3	V/µs
Gain Bandwidth Product	700	kHz
Current - Input Bias	20	nA
Voltage - Input Offset	3	mV
Current - Supply	500	µA (x2 Channels)
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	26	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LM2904DG4 is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

Package type and physical dimensions (8-SOIC 0.154" width)
Number of circuits (2 independent amplifiers)
Supply voltage range compatibility (minimum 3V, maximum ≥26V)
Gain bandwidth product (700 kHz or higher)
Input bias current (20 nA or lower)
Output current capability (40 mA per channel or higher)
Operating temperature range (-40°C to 125°C or broader)

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (8-SOIC Package) Parts that maintain identical or superior electrical specifications within the same 8-SOIC package footprint. These include LM2904M/NOPB, LM2904MX/NOPB, and LM2904DR.

Category 2: Functional Alternatives (Different Package) Parts that meet electrical requirements but use alternative package formats (8-SOP) such as BA10358F-E1, BA10358F-E2, and BA2904SF-E2. These require PCB layout modification.

Category 3: Extended Temperature Range Variants Parts with automotive qualification and extended operating ranges, such as LM2904AQS-13, suitable for demanding environmental conditions.

Parameter Comparison

Part Number	Manufacturer	Package	Slew Rate (V/µs)	GBW (kHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Status
LM2904DG4	Texas Instruments	8-SOIC	0.3	700	20	3	500	40	3	26	-40 to 125	Obsolete
LM2904M/NOPB	Texas Instruments	8-SOIC	—	1000	45	2	1000	40	3	32	-40 to 85	Active
LM2904MX/NOPB	Texas Instruments	8-SOIC	—	1000	45	2	1000	40	3	32	-40 to 85	Active
LM2904DR	Rohm Semiconductor	8-SOIC	0.3	700	20	3	1000	40	3	26	-40 to 125	Not For New Designs
LM358AM/NOPB	Texas Instruments	8-SOIC	—	1000	45	2	1000	40	3	32	0 to 70	Active
LM358AMX/NOPB	Texas Instruments	8-SOIC	—	1000	45	2	1000	40	3	32	0 to 70	Active
BA10358F-E1	Rohm Semiconductor	8-SOP	0.2	500	45	2	700	20	3	32	-40 to 85	Active
BA10358F-E2	Rohm Semiconductor	8-SOP	0.2	500	45	2	700	20	3	32	-40 to 85	Active
BA2904SF-E2	Rohm Semiconductor	8-SOP	0.2	500	20	2	500	30	3	32	-40 to 105	Active
LM2904AQS-13	Diodes Incorporated	8-SOIC	0.3	700	20	2	700	40	2	36	-40 to 125	Active

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Footprint):

The LM2904M/NOPB and LM2904MX/NOPB from Texas Instruments are the primary recommended substitutes. Both are active products with superior gain bandwidth product (1 MHz versus 700 kHz), improved input offset voltage (2 mV versus 3 mV), and extended maximum supply voltage (32V versus 26V). These parts are pin-compatible and require no PCB modification. The LM2904MX/NOPB is supplied in Cut Tape & Digi-Reel packaging, while LM2904M/NOPB is supplied in Tube packaging.

For Extended Temperature and Automotive Applications:

The LM2904AQS-13 from Diodes Incorporated is an active product with AEC-Q100 automotive qualification. It maintains the original 700 kHz gain bandwidth product and 0.3V/µs slew rate, supports an extended supply range (2V to 36V), and operates across the full -40°C to 125°C temperature range. This part is suitable for automotive and industrial applications requiring enhanced reliability.

For Legacy Compatibility (Matching Original Specifications):

The LM2904DR from Rohm Semiconductor provides electrical equivalence with identical slew rate (0.3V/µs) and gain bandwidth product (700 kHz). However, this part is marked "Not For New Designs," making it suitable only for maintenance and repair of existing systems. It is available in high inventory quantities.

For Alternative Package Formats:

The BA10358F-E2 and BA2904SF-E2 from Rohm Semiconductor use 8-SOP packaging (0.173" width) instead of 8-SOIC. These require PCB layout modification but offer active product status. The BA2904SF-E2 is particularly notable for matching the original input bias current (20 nA) and supply current (500 µA) specifications while supporting an extended temperature range (-40°C to 105°C).

Compliance and Regulatory Status:

All substitute parts listed are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. All maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard handling and storage procedures.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace LM2904DG4 with LM2904M/NOPB without modifying my PCB?

Yes. Both parts use identical 8-SOIC packaging with 0.154" width and are pin-compatible. No PCB modification is required. The LM2904M/NOPB offers superior electrical performance with 1 MHz gain bandwidth product compared to the original 700 kHz.

Q2: What is the key difference between LM2904M/NOPB and LM358AM/NOPB?

Both are Texas Instruments active products in 8-SOIC packaging with 1 MHz gain bandwidth product. The primary difference is operating temperature range: LM2904M/NOPB operates -40°C to 85°C, while LM358AM/NOPB operates 0°C to 70°C. For applications requiring full -40°C operation, LM2904M/NOPB is the appropriate choice.

Q3: Why do BA10358F-E2 and BA2904SF-E2 have lower output current specifications?

These Rohm Semiconductor parts use 8-SOP packaging (0.173" width) instead of 8-SOIC. The different package geometry results in different thermal and electrical characteristics. BA10358F-E2 provides 20 mA output current per channel, while BA2904SF-E2 provides 30 mA. Both are lower than the original 40 mA specification. PCB layout modification is required for these alternatives.

Q4: Is LM2904AQS-13 suitable for automotive applications?

Yes. The LM2904AQS-13 carries AEC-Q100 automotive qualification from Diodes Incorporated. It maintains the original electrical specifications (700 kHz GBW, 0.3V/µs slew rate, 20 nA input bias) and supports the full -40°C to 125°C temperature range. It is the recommended choice for automotive and industrial applications.

Q5: Can I use LM2904DR as a substitute?

The LM2904DR from Rohm Semiconductor is electrically equivalent with matching slew rate and gain bandwidth product. However, it is marked "Not For New Designs," indicating it is a legacy product. It is suitable only for maintenance, repair, and replacement of existing systems. For new designs, use LM2904M/NOPB or LM2904AQS-13.

Q6: What does "Not For New Designs" status mean?

This designation indicates the manufacturer has discontinued active development and recommends against using the part in new product designs. Such parts may have limited future availability and reduced manufacturer support. They are appropriate for sustaining production of existing products and field repairs.

Q7: Are all substitute parts ROHS3 compliant?

Yes. All substitute parts listed in this document are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q8: Which substitute offers the widest supply voltage range?

The LM2904AQS-13 supports 2V to 36V supply range, the widest among all listed substitutes. The original LM2904DG4 supports 3V to 26V. This extended range makes LM2904AQS-13 suitable for applications with variable or wide supply voltage requirements.

Q9: What is the difference between LM2904MX/NOPB and LM2904M/NOPB packaging?

Both parts are electrically identical with 1 MHz gain bandwidth product and -40°C to 85°C operating range. The difference is packaging format: LM2904MX/NOPB is supplied in Cut Tape & Digi-Reel format for automated assembly, while LM2904M/NOPB is supplied in Tube format for manual handling and lower-volume applications.

Q10: If my application requires -40°C to 125°C operation, which substitute should I use?

Two options maintain the full -40°C to 125°C temperature range: LM2904DR (legacy, not for new designs) and LM2904AQS-13 (active, automotive qualified). For new designs and long-term support, LM2904AQS-13 is the recommended choice.

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