LM2902KD Equivalent & Substitute Parts

Part Overview

The LM2902KD is a general-purpose operational amplifier manufactured by Texas Instruments, featuring four independent circuits in a 14-SOIC surface-mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The LM2902KD operates across a wide supply voltage range (3V to 26V) and temperature range (-40°C to 125°C), making it suitable for general analog signal processing applications requiring moderate bandwidth and low input bias current.

Due to Last Time Buy status, alternative equivalent parts are necessary for new designs and long-term production planning. Substitute parts must maintain compatibility across electrical parameters including supply voltage range, input bias current, output current capability, and package form factor.

Key Parameters

Parameter	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

Substitution of the LM2902KD is determined by strict compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Number of circuits: Must equal 4
Supply voltage range: Minimum 3V, maximum must accommodate 26V operation
Input bias current: 20 nA baseline; substitutes with higher values (45 nA, 90 nA) remain functionally compatible
Input offset voltage: 3 mV or lower
Output current per channel: Minimum 30 mA
Operating temperature range: Must support -40°C to 125°C or equivalent industrial range

Mechanical Compatibility Criteria:

Package type: 14-SOIC form factor with 0.154" (3.90mm) width
Mounting type: Surface mount
Pin count and pitch: 14-pin SOIC standard

Regulatory Compliance:

RoHS3 compliance required
MSL rating: Level 1 (Unlimited)

Substitute parts are grouped into two categories based on performance characteristics:

Category A - Direct Performance Equivalents: Parts maintaining slew rate and gain-bandwidth product specifications within ±20% of the LM2902KD (0.5V/µs slew rate, 1.2 MHz GBW).

Category B - Functional Equivalents: Parts meeting all electrical and mechanical requirements but with different performance profiles (lower slew rate, reduced bandwidth, or lower supply current), suitable for applications not requiring the full performance envelope of the LM2902KD.

Parameter Comparison

Part Number	Manufacturer	Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Supply Max (V)	Temp Range (°C)	Package
LM2902KD	Texas Instruments	Last Time Buy	0.5	1.2	20	3	1.4	30	26	-40 to 125	14-SOIC
LM2902M/NOPB	Texas Instruments	Active	—	1.0	45	2	1.5	40	32	-40 to 85	14-SOIC
LM2902MX/NOPB	Texas Instruments	Active	—	1.0	45	2	1.5	40	32	-40 to 85	14-SOIC
LM2902DR	Rohm Semiconductor	Obsolete	0.3	1.2	20	1	1.0	30	32	-40 to 125	14-SOIC
LM2902DT	Rohm Semiconductor	Not For New Designs	0.3	0.8	20	1	1.0	30	32	-40 to 125	14-SOIC
LP2902M/NOPB	Texas Instruments	Active	0.05	0.1	2	2	0.085	10	26	-40 to 85	14-SOIC
LP2902MX/NOPB	Texas Instruments	Active	0.05	0.1	2	2	0.085	10	26	-40 to 85	14-SOIC
BA2902SF-E2	Rohm Semiconductor	Active	0.2	0.5	20	2	0.7	30	32	-40 to 105	14-SOIC
LM224ADT	STMicroelectronics	Active	0.4	1.3	20	2	1.5	40	30	-40 to 105	14-SOIC
LM2902DR2G	onsemi	Active	—	1.0	90	2	—	40	32	-40 to 105	14-SOIC
LM2902KDR	Rohm Semiconductor	Obsolete	0.3	0.7	20	3	1.4	30	26	-40 to 125	14-SOIC

Engineering Selection Recommendations

For Active Production (Recommended Primary Choices):

LM2902M/NOPB and LM2902MX/NOPB (Texas Instruments, Active status) provide the closest functional match to the LM2902KD. Both devices maintain 1.0 MHz gain-bandwidth product, 14-SOIC packaging, and extended supply voltage range to 32V. These parts are currently in active production with substantial inventory (2640 and 1499 units respectively). The primary trade-off is reduced operating temperature range (-40°C to 85°C versus -40°C to 125°C) and slightly elevated input bias current (45 nA versus 20 nA). These differences are acceptable for most general-purpose applications.

LM224ADT (STMicroelectronics, Active status) offers superior gain-bandwidth product (1.3 MHz) and slew rate (0.4V/µs) with extended temperature range to 105°C. This part is suitable for applications requiring higher performance margins and is available in high volume (34,870 units).

LM2902DR2G (onsemi, Active status) provides 1.0 MHz bandwidth with 40 mA output current per channel and extended temperature range to 105°C. High inventory availability (205,100 units) supports long-term supply security.

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

LM2902DR (Rohm Semiconductor, Obsolete status) maintains full temperature range compatibility with the LM2902KD and offers improved input offset voltage (1 mV). However, obsolete status limits future availability.

LM2902DT (Rohm Semiconductor, Not For New Designs status) similarly supports the full temperature range but is explicitly restricted from new design implementation.

For Low-Power Applications:

LP2902M/NOPB and LP2902MX/NOPB (Texas Instruments, Active status) reduce supply current to 85 µA and output current to 10 mA per channel. These parts are suitable for battery-powered or power-constrained applications where the LM2902KD's performance envelope exceeds requirements.

Regulatory and Compliance Status:

All substitute parts maintain RoHS3 compliance and MSL Level 1 rating, matching the LM2902KD specifications. REACH and ECCN classifications are consistent across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can LM2902M/NOPB directly replace LM2902KD in existing designs?

A: LM2902M/NOPB is electrically compatible for most applications. The 14-SOIC package and pin configuration are identical. However, the reduced operating temperature range (-40°C to 85°C versus -40°C to 125°C) must be verified against application requirements. Input bias current increases from 20 nA to 45 nA; applications with high-impedance input circuits should be evaluated. Supply voltage maximum increases to 32V, providing additional design margin.

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

A: Both parts are electrically identical. The primary difference is packaging format: LM2902M/NOPB is supplied in Tube packaging, while LM2902MX/NOPB is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements and inventory management preferences.

Q: Why do some substitute parts show "Obsolete" or "Not For New Designs" status?

A: Parts designated as Obsolete (LM2902DR, LM2902KDR) or Not For New Designs (LM2902DT) are no longer manufactured or supported by their respective manufacturers. These parts may be available from existing inventory but cannot be relied upon for long-term production. New designs should utilize parts with Active status.

Q: Is LM224ADT a suitable replacement for the LM2902KD?

A: LM224ADT is functionally compatible and offers superior performance (1.3 MHz bandwidth, 0.4V/µs slew rate) with extended temperature range to 105°C. The 14-SOIC package and pin configuration are identical. This part is recommended for applications requiring higher performance margins. Verify that the slightly different input offset voltage (2 mV versus 3 mV) and output current (40 mA versus 30 mA) do not affect circuit design.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) four independent circuits in a single package, (2) 14-SOIC surface-mount package with 0.154" width, (3) supply voltage range supporting minimum 3V and maximum at least 26V, (4) input bias current of 20 nA or lower (higher values acceptable with circuit verification), (5) output current capability of at least 30 mA per channel, (6) operating temperature range supporting -40°C minimum (125°C maximum preferred but 85°C to 105°C acceptable with application review), and (7) RoHS3 compliance.

Q: Can LP2902M/NOPB replace LM2902KD in high-speed applications?

A: No. LP2902M/NOPB is designed for low-power operation with significantly reduced performance: 0.1 MHz bandwidth versus 1.2 MHz, 0.05V/µs slew rate versus 0.5V/µs, and 10 mA output current versus 30 mA. This part is suitable only for applications where bandwidth and slew rate requirements are minimal and power consumption is the primary design constraint.

Q: What inventory considerations should guide part selection?

A: LM2902DR2G (onsemi) offers the highest inventory availability (205,100 units), providing maximum supply security for high-volume production. LM224ADT (STMicroelectronics) provides 34,870 units. LM2902M/NOPB and LP2902MX/NOPB offer moderate inventory (2640 and 2700 units respectively). For critical applications, verify current inventory levels with suppliers before design finalization.

Q: Are there package form factor differences between substitute parts?

A: All recommended substitute parts use 14-SOIC surface-mount packaging with 0.154" (3.90mm) width, matching the LM2902KD. Pin configuration and spacing are identical, enabling direct PCB layout compatibility. BA2902SF-E2 uses a slightly wider 14-SOP package (0.173", 4.40mm width) and should be verified for PCB footprint compatibility before implementation.

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