LM224ADRE4 Equivalent & Substitute Parts

Part Overview

The LM224ADRE4 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, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. The LM224ADRE4 operates across a supply voltage range of 3V to 30V with a gain bandwidth product of 1.2 MHz and a slew rate of 0.5V/µs, making it suitable for general-purpose amplification applications requiring moderate bandwidth performance.

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	15	nA
Voltage - Input Offset	2	mV
Current - Supply (x4 Channels)	1.4	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-25 to 85	°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 LM224ADRE4 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Number of circuits (4 required)
Gain bandwidth product (1.2 MHz nominal)
Slew rate (0.5V/µs nominal)
Input bias current (15 nA nominal)
Input offset voltage (2 mV nominal)
Supply current per channel (1.4 mA nominal)
Output current per channel (30 mA nominal)
Supply voltage range (minimum 3V, maximum 30V)
Operating temperature range (-25°C to 85°C)

Mechanical Compatibility Criteria:

Package type: 14-SOIC surface mount
Package width: 0.154" (3.90mm)
Mounting type: Surface mount

Compliance Criteria:

RoHS3 compliance
Moisture sensitivity level 1

Substitute parts are grouped into two categories: direct equivalents that maintain all electrical specifications within the original operating envelope, and functional alternatives that provide equivalent circuit count and general-purpose amplification capability with variations in secondary performance parameters such as slew rate, bandwidth, or supply current characteristics.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Package
LM224ADRE4	Texas Instruments	Obsolete	0.5	1.2	15	1.4	30	-25 to 85	14-SOIC
LM224ADR	Texas Instruments	Active	0.5	1.2	15	1.4	30	-25 to 85	14-SOIC
LM2902DR	Rohm Semiconductor	Obsolete	0.3	1.2	20	1.0	30	-40 to 125	14-SOIC
LM324AM/NOPB	Texas Instruments	Active	—	1.0	45	1.5	40	0 to 70	14-SOIC
LM324AMX/NOPB	Texas Instruments	Active	—	1.0	45	1.5	40	0 to 70	14-SOIC
LM324M/NOPB	Texas Instruments	Active	—	1.0	45	1.5	40	0 to 70	14-SOIC
LM324MX/NOPB	Texas Instruments	Active	—	1.0	45	1.5	40	0 to 70	14-SOIC
LP324M/NOPB	Texas Instruments	Active	0.05	0.1	2	0.085	10	0 to 70	14-SOIC
LP324MX/NOPB	Texas Instruments	Active	0.05	0.1	2	0.085	10	0 to 70	14-SOIC
BA10324AF-E2	Rohm Semiconductor	Active	0.2	0.5	20	0.6	35	-40 to 85	14-SOIC
BA2902F-E2	Rohm Semiconductor	Active	0.2	0.5	20	0.7	30	-40 to 125	14-SOIC

Engineering Selection Recommendations

Primary Substitute: LM224ADR

The LM224ADR is the direct active equivalent of the LM224ADRE4. This part maintains identical electrical specifications including slew rate (0.5V/µs), gain bandwidth product (1.2 MHz), input bias current (15 nA), supply current (1.4 mA), and output current (30 mA). The LM224ADR is manufactured by Texas Instruments with active product status, ensuring long-term availability and supply chain continuity. Both parts are RoHS3 compliant with moisture sensitivity level 1. The LM224ADR is available in Cut Tape and Digi-Reel packaging formats with 133,500 units in stock.

Secondary Substitutes: LM324 Series (LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, LM324MX/NOPB)

The LM324 series represents a functional alternative with active product status from Texas Instruments. These parts maintain the 4-circuit configuration and 14-SOIC package format. The LM324 series operates within the 3V to 32V supply range and provides 40 mA output current per channel, exceeding the LM224ADRE4 specification of 30 mA. However, the LM324 series exhibits reduced gain bandwidth product (1.0 MHz versus 1.2 MHz) and higher input bias current (45 nA versus 15 nA). The operating temperature range is restricted to 0°C to 70°C, which is narrower than the LM224ADRE4 range of -25°C to 85°C. These parts are suitable for applications where the reduced bandwidth and higher input bias current are acceptable trade-offs for improved output current capability and active product status.

Alternative Substitutes: LP324 Series (LP324M/NOPB, LP324MX/NOPB)

The LP324 series provides a low-power alternative with significantly reduced supply current (85 µA versus 1.4 mA) and input bias current (2 nA versus 15 nA). These parts are suitable for battery-powered or low-power applications. However, the LP324 series exhibits substantially reduced gain bandwidth product (100 kHz versus 1.2 MHz) and slew rate (0.05V/µs versus 0.5V/µs), limiting applicability to low-frequency signal processing. Output current per channel is reduced to 10 mA. The operating temperature range is 0°C to 70°C.

Cross-Manufacturer Alternatives: Rohm Semiconductor Parts (LM2902DR, BA10324AF-E2, BA2902F-E2)

Rohm Semiconductor offers compatible 4-circuit general-purpose amplifiers in 14-SOIC packages. The LM2902DR provides 1.2 MHz gain bandwidth product with extended operating temperature range (-40°C to 125°C) but exhibits reduced slew rate (0.3V/µs) and lower supply current (1.0 mA). The BA10324AF-E2 and BA2902F-E2 provide 500 kHz gain bandwidth product with reduced slew rate (0.2V/µs) and lower supply current (600 µA to 700 µA). These parts are suitable for applications where extended temperature range or reduced power consumption is prioritized over bandwidth performance.

Frequently Asked Questions (FAQ)

Q: Can the LM224ADR directly replace the LM224ADRE4 without circuit modification?

A: Yes. The LM224ADR is electrically and mechanically identical to the LM224ADRE4. Both parts maintain the same slew rate (0.5V/µs), gain bandwidth product (1.2 MHz), input bias current (15 nA), supply current (1.4 mA), output current (30 mA), and operating temperature range (-25°C to 85°C). The 14-SOIC package dimensions are identical. No circuit modification is required.

Q: What is the primary advantage of using LM324 series parts instead of LM224ADR?

A: The LM324 series maintains active product status with higher output current capability (40 mA per channel versus 30 mA). However, the LM324 series exhibits reduced gain bandwidth product (1.0 MHz versus 1.2 MHz), higher input bias current (45 nA versus 15 nA), and a narrower operating temperature range (0°C to 70°C versus -25°C to 85°C). Selection depends on whether the application requires the extended temperature range and higher input impedance of the LM224 series or the increased output current of the LM324 series.

Q: Are the LP324 series parts suitable as direct replacements?

A: The LP324 series is not suitable as a direct replacement for general-purpose applications. While these parts maintain the 4-circuit configuration and 14-SOIC package, they exhibit significantly reduced gain bandwidth product (100 kHz versus 1.2 MHz) and slew rate (0.05V/µs versus 0.5V/µs). The LP324 series is designed for low-power, low-frequency applications and will not perform adequately in circuits designed for the LM224ADRE4 bandwidth specifications.

Q: What is the difference between LM224ADR and LM224ADRE4 packaging?

A: The LM224ADR is available in Cut Tape (CT) and Digi-Reel packaging formats, while the LM224ADRE4 was supplied in standard packaging. Both parts use the 14-SOIC package with identical 0.154" (3.90mm) width. The packaging format difference relates to tape and reel configuration for automated assembly, not the physical component dimensions.

Q: Can Rohm Semiconductor parts (LM2902DR, BA10324AF-E2, BA2902F-E2) replace the LM224ADRE4?

A: Rohm Semiconductor parts provide functional alternatives with 4-circuit general-purpose amplifier configuration in compatible 14-SOIC packages. However, these parts exhibit reduced slew rate and gain bandwidth product compared to the LM224ADRE4. The LM2902DR maintains 1.2 MHz bandwidth but with 0.3V/µs slew rate. The BA10324AF-E2 and BA2902F-E2 provide 500 kHz bandwidth with 0.2V/µs slew rate. These parts are suitable only for applications where reduced bandwidth performance is acceptable.

Q: What is the operating temperature range limitation of the LM324 series?

A: The LM324 series operates from 0°C to 70°C, which is narrower than the LM224ADRE4 range of -25°C to 85°C. Applications requiring operation below 0°C or above 70°C must use the LM224ADR or other parts with extended temperature specifications. The Rohm Semiconductor LM2902DR and BA2902F-E2 provide extended temperature range to 125°C.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant with moisture sensitivity level 1 (unlimited). All parts meet REACH compliance requirements and carry EAR99 export classification.

Q: What is the primary reason to select LM224ADR over other substitutes?

A: The LM224ADR is the recommended primary substitute because it maintains complete electrical and mechanical compatibility with the LM224ADRE4 while offering active product status, ensuring long-term availability and supply chain continuity. The LM224ADR is manufactured by Texas Instruments with 133,500 units in stock, providing reliable procurement for ongoing production requirements.

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