LM2902AQS14-13 Equivalent & Substitute Parts

Part Overview

The LM2902AQS14-13 is a general-purpose operational amplifier integrated circuit manufactured by Diodes Incorporated. This device contains four independent amplifier circuits in a 14-SOIC surface-mount package and is qualified to AEC-Q100 automotive standards. The part is currently in active production status with 13,466 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or temperature ratings are required for specific applications, or when design flexibility demands components from different manufacturers with equivalent electrical performance.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2902AQS14-13
Manufacturer	Diodes Incorporated
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	4
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.3 V/µs
Gain Bandwidth Product	700 kHz
Current - Input Bias	20 nA
Voltage - Input Offset	2 mV
Current - Supply	1 mA (x4 Channels)
Current - Output / Channel	40 mA
Voltage - Supply Span (Min)	2 V
Voltage - Supply Span (Max)	36 V
Operating Temperature	-40°C ~ 125°C
Grade	Automotive
Qualification	AEC-Q100
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM2902AQS14-13 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Number of circuits: Must be 4 independent amplifier circuits
Package type: Must be 14-SOIC (0.154", 3.90mm Width) for mechanical and electrical compatibility
Mounting type: Must be surface mount
Supply voltage range: Substitute must operate within or encompass the 2 V to 36 V range
Input bias current: 20 nA specification
Input offset voltage: 2 mV or lower
Output current per channel: 40 mA or greater
Operating temperature: Must support -40°C to 125°C or a subset thereof

Compliance and Certification:

RoHS3 compliance required
Moisture sensitivity level 1 (unlimited) preferred
Automotive grade and AEC-Q100 qualification preferred for automotive applications

Substitute parts are grouped into two categories: direct equivalents with identical electrical specifications and functional alternatives with enhanced or modified performance characteristics that remain compatible within the application envelope.

Parameter Comparison

Parameter	LM2902AQS14-13	LM124D	LM124DG4	LM124DR	LM124DRG4	LM124DT	LM224D	LM224DR	LM224DRG3	LM248D	LM248DR
Manufacturer	Diodes Inc.	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	UMW	Texas Instruments	STMicroelectronics	Texas Instruments
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	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	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.3	0.4	0.5	0.5	0.5	0.4	0.4	0.5	0.5	0.5	0.5
Gain Bandwidth Product (MHz)	0.7	1.2	1.2	1.2	1.2	1.3	1.2	1.2	1.2	1.0	1.0
Current - Input Bias (nA)	20	20	20	20	20	20	20	20	20	30	30
Voltage - Input Offset (mV)	2	2	3	3	3	2	2	3	3	1	1
Current - Supply (mA)	1.0	1.5	1.4	1.4	1.4	1.5	1.5	0.7	1.4	2.1	2.4
Current - Output / Channel (mA)	40	30	30	30	30	40	40	30	30	25	25
Voltage - Supply Span Min (V)	2	3	3	3	3	3	3	3	3	44	8
Voltage - Supply Span Max (V)	36	30	30	30	30	30	30	32	30	44	36
Operating Temperature (°C)	-40 ~ 125	-55 ~ 125	-55 ~ 125	-55 ~ 125	-55 ~ 125	-55 ~ 125	-40 ~ 105	-20 ~ 85	-25 ~ 85	-40 ~ 105	-25 ~ 85
Product Status	Active	Obsolete	Last Time Buy	Active	Discontinued at DiGi Electronics	Active	Active	Active	Last Time Buy	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compatibility):

The LM124DR and LM124DT are the preferred substitutes for the LM2902AQS14-13. Both parts are in active production status and offer enhanced performance characteristics. The LM124DR (Texas Instruments) provides the highest inventory availability at 171,766 units and maintains full 14-SOIC package compatibility. The LM124DT (STMicroelectronics) offers equivalent performance with 10,200 units in stock. Both parts support the extended temperature range of -55°C to 125°C, exceeding the original specification.

The LM124DR and LM124DT feature improved slew rate (0.5 V/µs versus 0.3 V/µs) and higher gain bandwidth product (1.2 MHz versus 0.7 MHz), enabling use in higher-frequency applications while maintaining backward compatibility in existing designs.

Secondary Substitutes (Active Status, Modified Specifications):

The LM224D and LM224DR are suitable alternatives for applications where the extended low-temperature performance of -55°C is not required. The LM224DR (UMW) offers the highest inventory availability among LM224 variants at 105,100 units and operates across -20°C to 85°C. The LM224D (STMicroelectronics) operates from -40°C to 105°C, matching the original part's lower temperature limit. Both maintain the 14-SOIC package and four-circuit configuration.

The LM248DR (Texas Instruments) is an active-status alternative suitable for applications requiring lower input offset voltage (1 mV) and input bias current (30 nA). This part operates from -25°C to 85°C and supports supply voltages from 8 V to 36 V, encompassing the upper range of the original specification.

Obsolete and End-of-Life Parts (Not Recommended for New Designs):

The LM124D (STMicroelectronics), LM124DG4 (Texas Instruments, Last Time Buy), LM124DRG4 (Texas Instruments, Discontinued at DiGi Electronics), LM224DRG3 (Texas Instruments, Last Time Buy), and LM248D (STMicroelectronics, Obsolete) are not recommended for new designs due to their discontinued or end-of-life status. These parts should only be used for legacy system maintenance or repair applications where design continuity is essential.

Compliance Verification:

All substitute parts listed maintain ROHS3 compliance and moisture sensitivity level 1 (unlimited). All parts are classified under ECCN EAR99 and HTSUS 8542.33.0001, matching the original part's regulatory classification. The LM2902AQS14-13 carries automotive grade and AEC-Q100 qualification; substitute parts without these certifications should be evaluated for automotive applications requiring these qualifications.

Frequently Asked Questions (FAQ)

Q: Can the LM124DR be used as a direct replacement for the LM2902AQS14-13 in automotive applications?

A: The LM124DR is mechanically and electrically compatible with the LM2902AQS14-13 in the 14-SOIC package. However, the LM2902AQS14-13 carries AEC-Q100 automotive qualification while the LM124DR does not. For applications requiring automotive-grade certification, the LM2902AQS14-13 or equivalent automotive-qualified parts must be specified. For non-automotive applications, the LM124DR is a suitable substitute with enhanced performance.

Q: What is the difference between the LM124DR and LM124DT?

A: Both parts are functionally equivalent with identical electrical specifications: 1.2 MHz gain bandwidth product, 0.5 V/µs slew rate, and -55°C to 125°C operating temperature. The primary differences are manufacturer (Texas Instruments versus STMicroelectronics) and packaging format (Cut Tape & Digi-Reel versus Cut Tape & Digi-Reel). The LM124DR has significantly higher inventory availability (171,766 units versus 10,200 units). Selection between these parts depends on supplier availability and procurement preferences.

Q: Why does the LM224DR have a lower supply current (0.7 mA) compared to the LM2902AQS14-13 (1.0 mA)?

A: The LM224DR is manufactured by UMW and features optimized power consumption characteristics. The reduced supply current represents an improvement in power efficiency while maintaining the same four-circuit configuration and 14-SOIC package. This lower current consumption is beneficial for battery-powered or power-constrained applications.

Q: Can the LM248DR be used in place of the LM2902AQS14-13?

A: The LM248DR is mechanically compatible in the 14-SOIC package but has different electrical specifications. The LM248DR features lower input offset voltage (1 mV versus 2 mV) and lower input bias current (30 nA versus 20 nA), which are improvements. However, the LM248DR has lower output current per channel (25 mA versus 40 mA) and lower gain bandwidth product (1.0 MHz versus 0.7 MHz). The LM248DR is suitable only for applications where the reduced output current and bandwidth are acceptable.

Q: What is the significance of the 2 V minimum supply voltage in the LM2902AQS14-13?

A: The 2 V minimum supply voltage specification allows operation in low-voltage applications such as battery-powered devices. Most substitute parts (LM124 and LM224 series) require a minimum of 3 V, restricting their use in 2 V systems. If 2 V operation is required, the LM2902AQS14-13 must be specified; no listed substitutes support this lower voltage threshold.

Q: Are all listed substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed in this reference maintain ROHS3 compliance status. All parts are also classified as REACH Unaffected and carry the same ECCN (EAR99) and HTSUS (8542.33.0001) codes as the original LM2902AQS14-13.

Q: What is the difference between "Last Time Buy" and "Discontinued at DiGi Electronics" product status?

A: "Last Time Buy" indicates that the manufacturer has announced end-of-life status but the part remains available for a limited period before production ceases. "Discontinued at DiGi Electronics" indicates that a specific distributor has ceased stocking the part, though it may remain available through other channels or the manufacturer. Both statuses indicate that long-term availability is not assured, and these parts should not be selected for new designs.

Q: Can the LM124DRG4 be used as a substitute if the LM124DR is unavailable?

A: The LM124DRG4 is electrically identical to the LM124DR with the same 14-SOIC package and performance specifications. However, the LM124DRG4 is marked as "Discontinued at DiGi Electronics," indicating limited availability. The LM124DR should be prioritized due to its active status and significantly higher inventory (171,766 units versus 5,600 units).

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