LM224AD Equivalent & Substitute Parts

Part Overview

The LM224AD is a general-purpose operational amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit device in a 14-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and production continuity. The LM224AD operates across a wide supply voltage range and is suitable for general-purpose amplification applications requiring moderate bandwidth and slew rate characteristics.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	0.4	V/µs
Gain Bandwidth Product	1.2	MHz
Current - Input Bias	20	nA
Voltage - Input Offset	2	mV
Current - Supply	1.5	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 105	°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 LM224AD is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Mandatory Matching Parameters:

Number of circuits: 4
Package type: 14-SOIC surface mount
Voltage supply span compatibility: minimum 3 V, maximum 30 V or greater
Operating temperature range: must encompass or exceed -40°C to 105°C
Slew rate and gain bandwidth product: must meet or exceed application requirements
Input bias current and input offset voltage: must be compatible with circuit design tolerances

Substitution Categories:

Category 1: Direct STMicroelectronics Equivalents Parts LM224ADT and LM224D maintain identical amplifier type (General Purpose), circuit count (4), and core electrical specifications. These parts differ primarily in packaging format and product status, with LM224ADT being active and LM224D available in tube packaging.

Category 2: Cross-Manufacturer General Purpose Alternatives Parts LM224ADR (Texas Instruments) and LM224ADRG4 (Texas Instruments) provide general-purpose amplification with compatible supply voltage ranges and package configurations. These parts maintain the 4-circuit configuration and 14-SOIC package standard.

Category 3: Alternative Amplifier Architecture Parts ADTL084ARZ, ADTL084ARZ-REEL, and ADTL084ARZ-REEL7 (Analog Devices Inc.) employ J-FET amplifier architecture, offering significantly improved input bias current (2 pA versus 20 nA) and higher slew rate (20 V/µs versus 0.4 V/µs). These parts require minimum supply voltage of 8 V and are suitable for applications requiring superior input impedance characteristics.

Category 4: Alternative Manufacturer General Purpose Part LM224DR (UMW) provides general-purpose amplification with push-pull output configuration and compatible supply voltage range, though with different slew rate specification.

Category 5: Cross-Manufacturer Variant Part LM224DR2G (onsemi) maintains the 4-circuit general-purpose configuration with compatible supply voltage range and 14-SOIC package.

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Number of Circuits	Slew Rate (V/µs)	Gain Bandwidth Product (MHz)	Input Bias Current (nA)	Input Offset Voltage (mV)	Output Current / Channel (mA)	Supply Voltage Min (V)	Supply Voltage Max (V)	Operating Temperature (°C)	Package
LM224AD	STMicroelectronics	Obsolete	General Purpose	4	0.4	1.2	20	2	30	3	30	-40 to 105	14-SOIC
LM224ADT	STMicroelectronics	Active	General Purpose	4	0.4	1.3	20	2	40	3	30	-40 to 105	14-SOIC
LM224D	STMicroelectronics	Active	General Purpose	4	0.4	1.2	20	2	40	3	30	-40 to 105	14-SOIC
LM224ADR	Texas Instruments	Active	General Purpose	4	0.5	1.2	15	2	30	3	30	-25 to 85	14-SOIC
LM224ADRG4	Texas Instruments	Obsolete	General Purpose	4	0.5	1.2	15	2	30	3	30	-25 to 85	14-SOIC
LM224DR	UMW	Active	General Purpose	4	0.5	1.2	20	3	30	3	32	-20 to 85	14-SOIC
LM224DR2G	onsemi	Active	General Purpose	4	—	1	90	2	40	3	32	-25 to 85	14-SOIC
ADTL084ARZ	Analog Devices Inc.	Active	J-FET	4	20	5	0.002	1.5	27	8	36	-40 to 125	14-SOIC
ADTL084ARZ-REEL	Analog Devices Inc.	Active	J-FET	4	20	5	0.002	1.5	27	8	36	-40 to 125	14-SOIC
ADTL084ARZ-REEL7	Analog Devices Inc.	Active	J-FET	4	20	5	0.002	1.5	27	8	36	-40 to 125	14-SOIC

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications:

LM224ADT (STMicroelectronics, Active) is the primary recommended substitute. This part maintains identical amplifier type, circuit count, slew rate, gain bandwidth product, input bias current, and input offset voltage as the LM224AD. The LM224ADT offers improved output current capability (40 mA versus 30 mA per channel) and is currently in active production status. Both parts are ROHS3 compliant with MSL 1 rating and identical supply voltage specifications.

LM224D (STMicroelectronics, Active) provides an alternative with identical electrical specifications to LM224AD and improved output current (40 mA per channel). This part is available in tube packaging and maintains full compatibility with the original design.

For Cross-Manufacturer Substitution:

LM224ADR (Texas Instruments, Active) is suitable for applications where the operating temperature range of -25°C to 85°C is acceptable. This part provides marginally improved input bias current (15 nA versus 20 nA) and slightly higher slew rate (0.5 V/µs versus 0.4 V/µs). The part is in active production with high inventory availability.

For Enhanced Performance Requirements:

ADTL084ARZ, ADTL084ARZ-REEL, and ADTL084ARZ-REEL7 (Analog Devices Inc., Active) are suitable substitutes for applications requiring superior input impedance characteristics. These J-FET amplifiers provide 50-fold improvement in input bias current (2 pA versus 20 nA) and 50-fold improvement in slew rate (20 V/µs versus 0.4 V/µs). These parts require minimum supply voltage of 8 V and are not compatible with 3 V to 5 V single-supply applications. All three variants are in active production with ROHS3 compliance.

For Alternative Manufacturer Options:

LM224DR (UMW, Active) and LM224DR2G (onsemi, Active) provide general-purpose amplification with compatible 14-SOIC packaging and supply voltage ranges. Both parts are in active production. LM224DR2G offers extended supply voltage maximum (32 V versus 30 V) but exhibits higher input bias current (90 nA versus 20 nA).

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and identical ECCN and HTSUS classifications as the original LM224AD.

Frequently Asked Questions (FAQ)

Q: Can LM224ADT be used as a direct replacement for LM224AD in all applications?

A: Yes. LM224ADT maintains identical amplifier type, circuit count, slew rate, gain bandwidth product, input bias current, and input offset voltage specifications. The improved output current capability (40 mA versus 30 mA per channel) provides additional design margin. Both parts operate across identical supply voltage ranges (3 V to 30 V) and temperature ranges (-40°C to 105°C). LM224ADT is in active production status, whereas LM224AD is obsolete.

Q: What is the primary difference between LM224ADT and LM224D?

A: Both parts are manufactured by STMicroelectronics and maintain identical electrical specifications. The primary difference is packaging format: LM224ADT is supplied in cut tape and Digi-Reel format, while LM224D is supplied in tube packaging. Both are in active production status.

Q: When should ADTL084ARZ be selected instead of LM224ADT?

A: ADTL084ARZ should be selected for applications requiring superior input impedance characteristics. The J-FET architecture provides 50-fold lower input bias current (2 pA versus 20 nA) and 50-fold higher slew rate (20 V/µs versus 0.4 V/µs). However, ADTL084ARZ requires minimum supply voltage of 8 V and is not suitable for 3 V to 5 V single-supply applications. The extended operating temperature range (-40°C to 125°C) provides additional margin for high-temperature environments.

Q: Is LM224ADR compatible with the LM224AD in terms of package and pinout?

A: Yes. LM224ADR maintains identical 14-SOIC package configuration and pinout compatibility. However, the operating temperature range is narrower (-25°C to 85°C versus -40°C to 105°C). LM224ADR is suitable for applications operating within this reduced temperature range and is currently in active production.

Q: What are the supply voltage limitations when substituting with ADTL084ARZ variants?

A: ADTL084ARZ, ADTL084ARZ-REEL, and ADTL084ARZ-REEL7 require minimum supply voltage of 8 V, compared to 3 V for LM224AD. These parts are not suitable for applications requiring operation at 3 V to 5 V supply voltages. The maximum supply voltage is 36 V, providing 6 V additional margin compared to LM224AD (30 V maximum).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (LM224ADT, LM224D, LM224ADR, LM224ADRG4, LM224DR, LM224DR2G, ADTL084ARZ, ADTL084ARZ-REEL, ADTL084ARZ-REEL7) are ROHS3 compliant with MSL 1 rating. All parts maintain identical ECCN (EAR99) and HTSUS (8542.33.0001) classifications as the original LM224AD.

Q: What is the inventory status of recommended substitutes?

A: LM224ADT (34,870 units), LM224D (4,495 units), LM224ADR (133,500 units), LM224ADRG4 (104,000 units), LM224DR (105,100 units), LM224DR2G (105,200 units), ADTL084ARZ (8,106 units), ADTL084ARZ-REEL (2,867 units), and ADTL084ARZ-REEL7 (44,200 units) are all available in stock as new original components.

Q: Can LM224DR2G be used in applications requiring the full -40°C to 105°C temperature range?

A: No. LM224DR2G operates across -25°C to 85°C, which does not encompass the full temperature range of LM224AD (-40°C to 105°C). LM224DR2G is suitable only for applications operating within the narrower temperature range. For full temperature range compatibility, select LM224ADT, LM224D, or ADTL084ARZ variants.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message