LM224ADRG4 Equivalent & Substitute Parts

Part Overview

The LM224ADRG4 is a general-purpose operational amplifier integrated circuit containing four independent amplifier circuits in a 14-SOIC surface mount package. Manufactured by Texas Instruments, this device is classified as obsolete product status. Due to its obsolete classification, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications. The LM224ADRG4 operates across a wide supply voltage range and is suitable for general-purpose amplification applications requiring moderate bandwidth and slew rate performance.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	LM224ADRG4	—
Manufacturer	Texas Instruments	—
Category	Linear, Amplifiers	—
Number of Circuits	4	—
Amplifier Type	General Purpose	—
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°C ~ 85°C	TA
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LM224ADRG4 is determined by the following critical parameters that must remain within acceptable tolerances:

Primary Substitution Criteria:

Number of circuits: 4 independent amplifier channels
Package type: 14-SOIC surface mount configuration
Supply voltage range: Minimum 3 V, Maximum 30 V or greater
Gain bandwidth product: 1.2 MHz or higher
Slew rate: 0.5 V/µs or higher
Current output per channel: 30 mA or greater
Input bias current: 15 nA or lower
Input offset voltage: 2 mV or lower
Operating temperature range: Must encompass -25°C to 85°C minimum
RoHS3 compliance and MSL Level 1 rating

Substitute parts are grouped into two categories based on electrical performance alignment:

Category A - Direct Electrical Equivalents (Active Status): Parts that maintain identical or superior electrical specifications while offering active product status. These include LM224ADR, LM324AMX/NOPB, LM324MX/NOPB, and LM324AM/NOPB. These parts satisfy all primary substitution criteria and provide enhanced availability.

Category B - Functional Equivalents with Parameter Variations: Parts that maintain core functionality within acceptable parameter ranges but exhibit variations in specific electrical characteristics. These include LM2902DR, LP324M/NOPB, LP324MX/NOPB, BA10324AF-E2, and BA2902F-E2. These parts require engineering evaluation based on application-specific requirements.

Parameter Comparison

Parameter	LM224ADRG4	LM224ADR	LM2902DR	LM324AMX/NOPB	LM324MX/NOPB	LP324MX/NOPB	BA10324AF-E2	BA2902F-E2
Manufacturer	Texas Instruments	Texas Instruments	Rohm Semiconductor	Texas Instruments	Texas Instruments	Texas Instruments	Rohm Semiconductor	Rohm Semiconductor
Number of Circuits	4	4	4	4	4	4	4	4
Slew Rate (V/µs)	0.5	0.5	0.3	—	—	0.05	0.2	0.2
Gain Bandwidth Product (MHz)	1.2	1.2	1.2	1	1	0.1	0.5	0.5
Current - Input Bias (nA)	15	15	20	45	45	2	20	20
Voltage - Input Offset (mV)	2	2	1	2	2	2	2	2
Current - Supply (mA)	1.4	1.4	1	1.5	1.5	0.085	0.6	0.7
Current - Output / Channel (mA)	30	30	30	40	40	10	35	30
Voltage - Supply Span Min (V)	3	3	3	3	3	3	3	3
Voltage - Supply Span Max (V)	30	30	32	32	32	32	32	32
Operating Temperature (°C)	-25 ~ 85	-25 ~ 85	-40 ~ 125	0 ~ 70	0 ~ 70	0 ~ 70	-40 ~ 85	-40 ~ 125
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.173", 4.40mm)
Product Status	Obsolete	Active	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation - LM224ADR: The LM224ADR is the manufacturer-recommended direct substitute for the LM224ADRG4. This part maintains identical electrical specifications including slew rate of 0.5 V/µs, gain bandwidth product of 1.2 MHz, and supply current of 1.4 mA across four channels. The LM224ADR carries active product status, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant with MSL Level 1 rating. The 14-SOIC package dimensions are identical (0.154", 3.90mm width), enabling direct PCB footprint compatibility. This substitution requires no circuit redesign or validation.

Secondary Recommendation - LM324AMX/NOPB and LM324MX/NOPB: These Texas Instruments LM324 series parts provide active product status with enhanced current output capability (40 mA per channel versus 30 mA). Both parts operate within the required supply voltage range (3 V to 32 V) and maintain identical package configuration. The gain bandwidth product is specified at 1 MHz, which is lower than the LM224ADRG4 specification of 1.2 MHz. Input bias current is higher at 45 nA compared to 15 nA. These parts are suitable for applications where the reduced bandwidth and higher input bias current do not impact circuit performance. Operating temperature range is limited to 0°C to 70°C, which is narrower than the LM224ADRG4 range of -25°C to 85°C.

Tertiary Recommendation - LM2902DR: The LM2902DR from Rohm Semiconductor maintains the 1.2 MHz gain bandwidth product and 4-circuit configuration. This part exhibits lower slew rate (0.3 V/µs versus 0.5 V/µs) and higher input bias current (20 nA versus 15 nA). The LM2902DR is classified as obsolete product status. The extended operating temperature range (-40°C to 125°C) exceeds the LM224ADRG4 specification. This part is suitable for applications requiring extended temperature performance where the reduced slew rate is acceptable.

Alternative Consideration - LP324MX/NOPB: The LP324MX/NOPB is a low-power variant with significantly reduced supply current (85 µA versus 1.4 mA) and lower output current capability (10 mA per channel versus 30 mA). The gain bandwidth product is reduced to 100 kHz. This part is suitable only for applications where power consumption is critical and bandwidth requirements are substantially lower than the original design specification.

Package Compatibility Note - BA10324AF-E2 and BA2902F-E2: The Rohm Semiconductor BA10324AF-E2 and BA2902F-E2 parts feature a slightly wider 14-SOIC package (0.173", 4.40mm width versus 0.154", 3.90mm width). PCB layout verification is required to confirm package footprint compatibility before substitution. Both parts maintain the 4-circuit configuration and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q1: Can the LM224ADRG4 be directly replaced with the LM224ADR?

A: Yes. The LM224ADR is the manufacturer-recommended substitute with identical electrical specifications and package configuration. Direct substitution requires no circuit modifications. The primary difference is product status: LM224ADR is active while LM224ADRG4 is obsolete.

Q2: What are the key electrical differences between LM224ADRG4 and LM324 series parts?

A: The LM324 series (LM324AMX/NOPB, LM324MX/NOPB) operates at 1 MHz gain bandwidth product compared to 1.2 MHz for the LM224ADRG4. Input bias current is higher at 45 nA versus 15 nA. Output current capability is enhanced at 40 mA per channel versus 30 mA. Operating temperature range is narrower at 0°C to 70°C versus -25°C to 85°C. These differences may impact circuit performance in bandwidth-sensitive or temperature-extreme applications.

Q3: Is the LP324MX/NOPB suitable as a substitute for the LM224ADRG4?

A: The LP324MX/NOPB is a low-power variant with substantially different electrical characteristics. Gain bandwidth product is reduced to 100 kHz (versus 1.2 MHz), and output current is limited to 10 mA per channel (versus 30 mA). This part is suitable only for applications where the original design specifications can accommodate significantly reduced bandwidth and output current capability.

Q4: What package compatibility issues exist with Rohm Semiconductor alternatives?

A: The BA10324AF-E2 and BA2902F-E2 parts feature a 14-SOIC package with 0.173" width (4.40mm) compared to the standard 0.154" width (3.90mm) of the LM224ADRG4. PCB layout verification is required to confirm that the wider package does not create clearance conflicts with adjacent components or board features.

Q5: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this document carry ROHS3 compliance certification and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of the LM224ADRG4.

Q6: Which substitute part offers the widest operating temperature range?

A: The LM2902DR and BA2902F-E2 both specify operating temperature range of -40°C to 125°C, which exceeds the LM224ADRG4 specification of -25°C to 85°C. These parts are suitable for applications requiring extended temperature performance.

Q7: What is the supply current difference between LM224ADRG4 and LP324MX/NOPB?

A: The LM224ADRG4 draws 1.4 mA total supply current across four channels, while the LP324MX/NOPB draws only 85 µA. This represents approximately 94% reduction in power consumption, making the LP324MX/NOPB suitable for battery-powered or power-constrained applications where bandwidth and output current requirements permit the substitution.

Q8: Can the LM224ADRG4 be substituted in applications requiring -25°C minimum operating temperature?

A: The LM324 series parts (LM324AMX/NOPB, LM324MX/NOPB) specify minimum operating temperature of 0°C, which does not meet the -25°C requirement. The LM224ADR, LM2902DR, BA10324AF-E2, and BA2902F-E2 all support extended low-temperature operation and are suitable for this requirement.

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