LM2902KNSRG4 Equivalent & Substitute Parts

Part Overview

The LM2902KNSRG4 is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, containing four independent amplifier circuits in a 14-SOIC surface-mount package. This device operates across a wide supply voltage range of 3V to 26V and is rated for industrial temperature applications from -40°C to 125°C. The part is currently designated as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications utilizing this operational amplifier.

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 (per 4 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 (0.209", 5.30mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LM2902KNSRG4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Four independent amplifier circuits
General-purpose operational amplifier classification
Slew rate between 0.4V/µs and 0.5V/µs
Gain bandwidth product between 1.0 MHz and 1.3 MHz
Input bias current of 20 nA
Input offset voltage of 2 mV to 3 mV
Supply current per channel not exceeding 1.5 mA
Output current per channel of 30 mA to 40 mA
Minimum supply voltage of 3V
Maximum supply voltage of 26V or higher
Operating temperature range including -40°C to 125°C or -40°C to 105°C
Surface-mount 14-SOIC package configuration
RoHS3 compliance

Secondary Considerations:

Product status (Active preferred over Last Time Buy or Obsolete)
Packaging format (Tape & Reel, Cut Tape, or Tube)
Automotive qualification (AEC-Q100) where applicable

Substitutes are grouped into two categories: direct replacements with identical or superior electrical specifications, and functional equivalents with minor parameter variations that remain within acceptable operational tolerances for general-purpose amplifier applications.

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Vcc Max (V)	Temp Range (°C)	Package	Status
LM2902KNSRG4	Texas Instruments	0.5	1.2	20	3	1.4	30	26	-40 to 125	14-SOIC (5.30mm)	Last Time Buy
LM2902KAVQDR	Texas Instruments	0.5	1.2	20	3	1.4	30	30	-40 to 125	14-SOIC (3.90mm)	Active
LM2902KNSR	Texas Instruments	0.5	1.2	20	3	1.4	30	26	-40 to 125	14-SOIC (5.30mm)	Last Time Buy
LM2902M/NOPB	Texas Instruments	—	1.0	45	2	1.5	40	32	-40 to 85	14-SOIC (3.90mm)	Active
LM2902MX/NOPB	Texas Instruments	—	1.0	45	2	1.5	40	32	-40 to 85	14-SOIC (3.90mm)	Active
LP2902M/NOPB	Texas Instruments	0.05	0.1	2	2	0.085	10	26	-40 to 85	14-SOIC (3.90mm)	Active
LP2902MX/NOPB	Texas Instruments	0.05	0.1	2	2	0.085	10	26	-40 to 85	14-SOIC (3.90mm)	Active
BA2902F-E2	Rohm Semiconductor	0.2	0.5	20	2	0.7	30	32	-40 to 125	14-SOIC (4.40mm)	Active
LM224D	STMicroelectronics	0.4	1.2	20	2	1.5	40	30	-40 to 105	14-SOIC (3.90mm)	Active
LM224DT	STMicroelectronics	0.4	1.3	20	2	1.5	40	30	-40 to 105	14-SOIC (3.90mm)	Active
LM2902D	onsemi	0.5	1.2	20	3	1.4	30	26	-40 to 125	14-SOIC (3.90mm)	Obsolete

Engineering Selection Recommendations

Tier 1 - Recommended Direct Replacements (Active Status, Identical Specifications):

The LM2902KAVQDR from Texas Instruments is the primary recommended substitute. This part maintains identical electrical specifications to the LM2902KNSRG4 with the exception of an increased maximum supply voltage (30V versus 26V), providing enhanced design margin. The device carries Active product status, ensuring long-term availability and supply chain stability. It includes AEC-Q100 automotive qualification, supporting applications requiring automotive-grade reliability. The package width is reduced to 3.90mm (versus 5.30mm), which may require PCB layout verification but offers improved board density.

Tier 2 - Compatible Substitutes (Active Status, Minor Parameter Variations):

The LM224DT from STMicroelectronics provides a functionally equivalent alternative with Active status and high inventory availability (35,200 units). This part maintains the critical 1.2 MHz to 1.3 MHz gain bandwidth product and 0.4V/µs slew rate, with identical input bias current and offset voltage specifications. The maximum supply voltage is 30V, and the operating temperature range extends to 105°C (versus 125°C for the original part). This device is suitable for applications where the reduced upper temperature limit is acceptable.

The LM224D from STMicroelectronics offers similar electrical performance with Active status and 4,495 units in inventory. Specifications are equivalent to LM224DT with the exception of slew rate (0.4V/µs) and gain bandwidth product (1.2 MHz).

Tier 3 - Functional Alternatives (Active Status, Reduced Performance):

The BA2902F-E2 from Rohm Semiconductor is an Active alternative with identical input bias current (20 nA) and output current (30 mA) specifications. However, this device exhibits reduced slew rate (0.2V/µs) and gain bandwidth product (500 kHz), making it suitable only for applications with lower bandwidth requirements. The supply current is significantly lower (700 µA), providing power efficiency benefits in battery-powered designs.

Tier 4 - Low-Power Alternatives (Active Status, Specialized Application):

The LP2902M/NOPB and LP2902MX/NOPB from Texas Instruments are low-power variants with substantially reduced supply current (85 µA) and output current (10 mA). These devices are appropriate only for applications where bandwidth and output drive requirements are minimal. The gain bandwidth product is 100 kHz, and the slew rate is 0.05V/µs, representing significant performance reduction compared to the original part.

Tier 5 - Obsolete Status (Not Recommended for New Designs):

The LM2902D from onsemi carries Obsolete status and is not recommended for new designs or long-term production applications, despite electrical specification equivalence to the original part.

Frequently Asked Questions (FAQ)

Q1: Can the LM2902KAVQDR directly replace the LM2902KNSRG4 without PCB modifications?

The LM2902KAVQDR maintains identical electrical specifications and pinout. However, the package width differs (3.90mm versus 5.30mm), requiring verification of PCB footprint compatibility. Pin spacing and lead configuration remain consistent with the 14-SOIC standard, but physical board layout may require adjustment to accommodate the narrower package width.

Q2: What is the significance of the Last Time Buy status for the LM2902KNSRG4?

Last Time Buy designation indicates that Texas Instruments has discontinued production of this part number. Existing inventory will be depleted without replenishment. Designs currently utilizing this part should transition to an Active alternative such as LM2902KAVQDR to ensure long-term supply availability and avoid future obsolescence issues.

Q3: Why do the LM2902M/NOPB and LM2902MX/NOPB have different electrical specifications despite the same base part number?

These variants represent different product lines within the LM2902 family. The M-suffix variants incorporate LinCMOS™ technology, resulting in reduced input bias current (45 nA versus 20 nA), lower input offset voltage (2 mV versus 3 mV), and higher maximum supply voltage (32V versus 26V). However, the gain bandwidth product is reduced to 1.0 MHz, and the operating temperature range is limited to -40°C to 85°C. These trade-offs make them suitable for different application requirements.

Q4: Is the LM224DT suitable for applications requiring the full -40°C to 125°C temperature range?

No. The LM224DT from STMicroelectronics is rated only to 105°C maximum operating temperature, which is 20°C below the original LM2902KNSRG4 specification. Applications requiring operation at temperatures above 105°C must utilize the LM2902KAVQDR or equivalent parts with extended temperature ratings.

Q5: What are the key differences between the BA2902F-E2 and the LM2902KNSRG4?

The BA2902F-E2 from Rohm Semiconductor is a lower-bandwidth alternative with significantly reduced slew rate (0.2V/µs versus 0.5V/µs) and gain bandwidth product (500 kHz versus 1.2 MHz). The supply current is substantially lower (700 µA versus 1.4 mA), and the output current per channel is identical (30 mA). This device is appropriate only for applications with bandwidth requirements below 500 kHz and where power consumption reduction is a priority.

Q6: Can the LP2902MX/NOPB replace the LM2902KNSRG4 in high-speed signal conditioning applications?

No. The LP2902MX/NOPB is a low-power, low-bandwidth variant with a gain bandwidth product of only 100 kHz and slew rate of 0.05V/µs. These specifications are insufficient for applications requiring the 1.2 MHz bandwidth and 0.5V/µs slew rate of the original part. This device is limited to DC and very low-frequency signal processing applications.

Q7: What packaging formats are available for substitute parts?

Substitute parts are available in multiple packaging formats: Tape & Reel (TR) for automated assembly, Cut Tape (CT) with Digi-Reel® for mixed-volume production, and Tube packaging for manual assembly or lower-volume applications. The LM2902KAVQDR is available in Tape & Reel format with 25,200 units in stock, supporting high-volume production requirements.

Q8: Are all recommended substitute parts RoHS3 compliant?

Yes. All substitute parts listed in Tier 1 and Tier 2 categories maintain RoHS3 compliance, consistent with the original LM2902KNSRG4. This ensures compatibility with environmental regulations and procurement requirements for RoHS-compliant designs.

Q9: Which substitute part offers the best inventory availability?

The LM224DT from STMicroelectronics offers the highest inventory availability with 35,200 units in stock. The LM2902KAVQDR from Texas Instruments provides 25,200 units, and the BA2902F-E2 from Rohm Semiconductor has 5,300 units available. Inventory levels should be verified with suppliers for current availability.

Q10: What is the primary advantage of the LM2902KAVQDR over the LM2902KNSRG4?

The LM2902KAVQDR provides three key advantages: (1) Active product status ensuring long-term availability, (2) increased maximum supply voltage of 30V versus 26V, providing enhanced design margin, and (3) AEC-Q100 automotive qualification for applications requiring automotive-grade reliability. Electrical performance is identical to the original part.

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