AS324AMTR-E1 Equivalent & Substitute Parts

Part Overview

The AS324AMTR-E1 is a general-purpose operational amplifier manufactured by Diodes Incorporated, configured as a 4-circuit integrated circuit in a 14-SOIC surface mount package. This device is classified as Active product status and is RoHS3 compliant. The AS324AMTR-E1 operates across a wide supply voltage range of 3 V to 36 V and maintains performance across industrial temperature ranges from -40°C to 85°C. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, different packaging formats, enhanced performance characteristics, or manufacturer availability considerations while maintaining functional compatibility within specified electrical parameters.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AS324AMTR-E1
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	4
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
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)	3 V
Voltage - Supply Span (Max)	36 V
Operating Temperature	-40°C ~ 85°C
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AS324AMTR-E1 are classified based on electrical parameter compatibility and mechanical interchangeability. The primary substitution criteria are:

Electrical Compatibility Parameters:

Number of circuits: 4 (mandatory)
Amplifier type: General Purpose (primary category)
Package / Case: 14-SOIC form factor (mechanical compatibility)
Mounting type: Surface Mount (assembly compatibility)
Voltage supply range overlap: Minimum 3 V to maximum 32 V or greater
Operating temperature range: -40°C to 85°C or broader
Current output per channel: 40 mA or greater
Input bias current: 20 nA to 90 nA (acceptable range for general-purpose applications)
Input offset voltage: 1 mV to 2 mV (acceptable range)

Compliance Parameters:

RoHS3 compliance (mandatory for equivalent substitution)
REACH unaffected status
Active or current product status (preferred for new designs)

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical specifications and packaging) and Functional Alternatives (compatible electrical parameters with different performance characteristics or packaging options).

Parameter Comparison

Parameter	AS324AMTR-E1 (Diodes)	LM324AM/NOPB (TI)	LM324AMX/NOPB (TI)	AD8684ARZ (ADI)	ADA4004-4ARZ-R7 (ADI)	LM224D (STM)	LM224DR2G (onsemi)	LM248D (STM)	LM248DR (TI)	LM2902DR2G (onsemi)
Amplifier Type	General Purpose	General Purpose	General Purpose	J-FET	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Current - Input Bias	20 nA	45 nA	45 nA	6 pA	40 nA	20 nA	90 nA	30 nA	30 nA	90 nA
Voltage - Input Offset	2 mV	2 mV	2 mV	350 µV	40 µV	2 mV	2 mV	1 mV	1 mV	2 mV
Current - Output / Channel	40 mA	40 mA	40 mA	12 mA	10 mA	40 mA	40 mA	25 mA	25 mA	40 mA
Voltage - Supply Span (Min)	3 V	3 V	3 V	9 V	10 V	3 V	3 V	44 V	8 V	3 V
Voltage - Supply Span (Max)	36 V	32 V	32 V	36 V	30 V	30 V	32 V	44 V	36 V	32 V
Operating Temperature (Min)	-40°C	0°C	0°C	-40°C	-40°C	-40°C	-25°C	-40°C	-25°C	-40°C
Operating Temperature (Max)	85°C	70°C	70°C	85°C	125°C	105°C	85°C	105°C	85°C	105°C
Product Status	Active	Active	Active	Active	Active	Active	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Preferred for Pin-Compatible Replacement):

The LM324AM/NOPB and LM324AMX/NOPB from Texas Instruments are direct functional equivalents to the AS324AMTR-E1. Both devices maintain identical electrical specifications for input bias current (45 nA), input offset voltage (2 mV), output current per channel (40 mA), and minimum supply voltage (3 V). The maximum supply voltage specification of 32 V on these parts is within the operational range of the AS324AMTR-E1 (36 V maximum). Both are Active product status and RoHS3 compliant. The primary difference is packaging format: LM324AM/NOPB is supplied in Tube packaging, while LM324AMX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Operating temperature range for these Texas Instruments parts is 0°C to 70°C, which is narrower than the AS324AMTR-E1 specification of -40°C to 85°C.

The LM224DR2G from onsemi provides equivalent electrical performance with 4-circuit general-purpose amplifier configuration in 14-SOIC package. Input bias current is specified at 90 nA (higher than the AS324AMTR-E1 at 20 nA), but remains within acceptable general-purpose amplifier parameters. Supply voltage range is 3 V to 32 V. Operating temperature range is -25°C to 85°C. This part is Active status and RoHS3 compliant.

The LM2902DR2G from onsemi is functionally equivalent with identical 4-circuit configuration and 14-SOIC package. Input bias current specification is 90 nA. Supply voltage range is 3 V to 32 V. Operating temperature range is -40°C to 105°C, which exceeds the AS324AMTR-E1 specification on the upper end. This part is Active status and RoHS3 compliant.

Functional Alternatives (Enhanced Performance Characteristics):

The AD8684ARZ from Analog Devices Inc. is a J-FET amplifier configuration with 4 circuits in 14-SOIC package. This device offers significantly lower input bias current (6 pA versus 20 nA) and lower input offset voltage (350 µV versus 2 mV), providing superior precision characteristics. However, the minimum supply voltage requirement is 9 V (versus 3 V for the AS324AMTR-E1), which restricts application in low-voltage circuits. Output current per channel is 12 mA (lower than the 40 mA specification of the AS324AMTR-E1). Operating temperature range is -40°C to 85°C. This part is Active status and RoHS3 compliant. Selection of this device is appropriate when low input bias current and low offset voltage are design requirements and supply voltage constraints are acceptable.

The ADA4004-4ARZ-R7 from Analog Devices Inc. is a general-purpose amplifier with iPolar® series designation, offering enhanced performance with 12 MHz gain bandwidth product, 2.7 V/µs slew rate, and 40 µV input offset voltage. Minimum supply voltage is 10 V, restricting low-voltage applications. Output current per channel is 10 mA (lower than the AS324AMTR-E1). Operating temperature range is -40°C to 125°C. Moisture sensitivity level is MSL 3 (168 Hours), which is more stringent than the AS324AMTR-E1 MSL 1 specification. This part is Active status and RoHS3 compliant. Selection is appropriate for applications requiring extended temperature operation and enhanced precision.

The LM248D from STMicroelectronics is marked as Obsolete product status. While electrical parameters are compatible (1 mV input offset voltage, 25 mA output current per channel), the obsolete status makes this part unsuitable for new designs or long-term production commitments.

The LM248DR from Texas Instruments is an Active product providing general-purpose amplifier functionality with 1 mV input offset voltage and 25 mA output current per channel. Supply voltage range is 8 V to 36 V, which restricts operation below 8 V compared to the AS324AMTR-E1 minimum of 3 V. Operating temperature range is -25°C to 85°C. This part is RoHS3 compliant and suitable for applications where the higher minimum supply voltage is acceptable.

The LM224D from STMicroelectronics is an Active product with general-purpose amplifier configuration. Input bias current is 20 nA (matching the AS324AMTR-E1). Supply voltage range is 3 V to 30 V. Operating temperature range is -40°C to 105°C. This part is RoHS3 compliant and represents a compatible alternative.

Selection Criteria Summary:

For direct replacement in existing designs, select LM324AM/NOPB, LM324AMX/NOPB, LM224DR2G, or LM2902DR2G based on packaging requirements and temperature range compatibility. For applications requiring enhanced precision and low input bias current, select AD8684ARZ with verification that 9 V minimum supply voltage is acceptable. For extended temperature operation to 125°C, select ADA4004-4ARZ-R7 with verification that 10 V minimum supply voltage and MSL 3 moisture sensitivity are acceptable. Avoid LM248D due to obsolete product status.

Frequently Asked Questions (FAQ)

Q: Can the LM324AM/NOPB directly replace the AS324AMTR-E1 in my circuit?

A: The LM324AM/NOPB is electrically compatible with the AS324AMTR-E1 for general-purpose amplifier applications. Both devices have 4 circuits in 14-SOIC package with matching input offset voltage (2 mV) and output current per channel (40 mA). The primary consideration is operating temperature range: LM324AM/NOPB operates 0°C to 70°C, while AS324AMTR-E1 operates -40°C to 85°C. If your application requires operation below 0°C or above 70°C, the LM324AM/NOPB is not suitable. Additionally, the maximum supply voltage of LM324AM/NOPB is 32 V versus 36 V for the AS324AMTR-E1, which is acceptable for most applications.

Q: What is the difference between LM324AMX/NOPB and LM324AM/NOPB?

A: The LM324AMX/NOPB and LM324AM/NOPB are electrically identical general-purpose 4-circuit amplifiers in 14-SOIC package. The difference is packaging format: LM324AM/NOPB is supplied in Tube packaging, while LM324AMX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Select based on your assembly process requirements. Both have identical electrical specifications and are Active product status.

Q: Why would I choose AD8684ARZ over the AS324AMTR-E1?

A: The AD8684ARZ is a J-FET amplifier offering significantly lower input bias current (6 pA versus 20 nA) and lower input offset voltage (350 µV versus 2 mV). This device is selected for precision applications where low input bias current and low offset voltage are critical design requirements. However, the AD8684ARZ requires a minimum supply voltage of 9 V (versus 3 V for the AS324AMTR-E1) and provides lower output current per channel (12 mA versus 40 mA). Verify that your circuit can accommodate these constraints before selecting this device.

Q: Is the LM248D suitable for new designs?

A: No. The LM248D is marked as Obsolete product status. For new designs, select from Active product alternatives such as LM324AM/NOPB, LM324AMX/NOPB, LM224DR2G, LM2902DR2G, or LM248DR. The LM248DR from Texas Instruments is an Active alternative with similar electrical characteristics.

Q: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package is a surface mount form factor with 0.154 inches (3.90 mm) width. All substitute parts listed maintain this identical package specification, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes. This package specification is mandatory for direct substitution without PCB redesign.

Q: Can I use LM2902DR2G in place of AS324AMTR-E1 for low-temperature applications?

A: Yes. The LM2902DR2G operates from -40°C to 105°C, which covers the AS324AMTR-E1 operating range of -40°C to 85°C and extends to higher temperatures. Electrical parameters are compatible: 4-circuit general-purpose amplifier configuration, 14-SOIC package, 40 mA output current per channel, and 3 V to 32 V supply voltage range. Input bias current is specified at 90 nA (higher than the AS324AMTR-E1 at 20 nA), but remains within acceptable general-purpose amplifier specifications.

Q: What does RoHS3 compliance mean for component substitution?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates that the component meets European environmental regulations restricting the use of specific hazardous materials including lead, cadmium, mercury, and certain flame retardants. All substitute parts listed are RoHS3 compliant, ensuring regulatory compliance for applications subject to these requirements. This is a mandatory compliance parameter for equivalent substitution.

Q: Why does the ADA4004-4ARZ-R7 have MSL 3 instead of MSL 1?

A: Moisture Sensitivity Level (MSL) indicates the component's sensitivity to moisture absorption during storage and handling. MSL 1 (Unlimited) means the component has no moisture sensitivity restrictions. MSL 3 (168 Hours) means the component must be used within 168 hours after the moisture barrier bag is opened, or it must be baked to remove absorbed moisture. The ADA4004-4ARZ-R7 requires more stringent moisture control during assembly compared to the AS324AMTR-E1. Verify that your manufacturing process includes appropriate moisture handling procedures before selecting this device.

Q: What is the minimum supply voltage requirement for each substitute part?

A: AS324AMTR-E1: 3 V; LM324AM/NOPB: 3 V; LM324AMX/NOPB: 3 V; AD8684ARZ: 9 V; ADA4004-4ARZ-R7: 10 V; LM224D: 3 V; LM224DR2G: 3 V; LM248D: 44 V; LM248DR: 8 V; LM2902DR2G: 3 V. Select a substitute part with minimum supply voltage equal to or lower than your circuit's minimum supply voltage specification.

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