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AS324MTR-E1 Equivalent & Substitute Parts
Part Overview
The AS324MTR-E1 is a general-purpose operational amplifier integrated circuit manufactured by Diodes Incorporated. This 4-circuit OPAMP is housed in a 14-SOIC surface mount package and is designed for applications requiring low-power, general-purpose amplification across a wide supply voltage range of 3V to 36V. The device is currently in active production status with 56,300 units in stock.
Substitute parts are necessary when the AS324MTR-E1 becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when enhanced performance characteristics are needed for specific application requirements while maintaining functional compatibility within the 14-SOIC package footprint.
Substiute Parts
Key Parameters
| Parameter | AS324MTR-E1 Value | Unit |
|---|---|---|
| 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 (x4 Channels) | 1 | mA |
| Current - Output / Channel | 40 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | -40°C ~ 85°C | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | — |
Substitute Part Grouping Explanation
Substitution of the AS324MTR-E1 is determined by the following critical parameters:
Mandatory Compatibility Criteria:
- Package / Case: 14-SOIC (0.154", 3.90mm Width) — all substitutes must use identical package footprint
- Mounting Type: Surface Mount — all substitutes must be surface mount compatible
- Number of Circuits: 4 — all substitutes must contain 4 operational amplifier circuits
- Amplifier Type: General Purpose — substitutes must be classified as general-purpose amplifiers
- Voltage - Supply Span: Minimum 3V to Maximum 36V — substitutes must support this supply range or a subset thereof
Performance Parameters Affecting Substitution:
- Current - Input Bias: 20 nA (baseline specification)
- Voltage - Input Offset: 2 mV (baseline specification)
- Current - Supply: 1 mA per 4 channels (baseline specification)
- Current - Output / Channel: 40 mA (baseline specification)
- Operating Temperature: -40°C ~ 85°C (baseline specification)
Compliance & Certification:
- RoHS3 Compliant status required
- REACH Unaffected status required
- ECCN: EAR99 classification
Substitute parts are grouped into two categories: General Purpose Amplifiers (matching amplifier type) and J-FET Amplifiers (alternative topology with enhanced input characteristics). General Purpose substitutes maintain functional equivalence with the AS324MTR-E1. J-FET substitutes offer superior input bias current performance but may have different supply voltage requirements and operating temperature ranges.
Parameter Comparison
| Parameter | AS324MTR-E1 | ADA4004-4ARZ | ADA4004-4ARZ-R7 | LM124DR | LM124DRG4 | LM124DT | AD8684ARZ | LF347BDR |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Diodes Inc. | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | STMicroelectronics | Analog Devices | Texas Instruments |
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | J-FET | J-FET |
| Number of Circuits | 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 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Current - Input Bias | 20 nA | 40 nA | 40 nA | 20 nA | 20 nA | 20 nA | 6 pA | 50 pA |
| Voltage - Input Offset | 2 mV | 40 µV | 40 µV | 3 mV | 3 mV | 2 mV | 350 µV | 3 mV |
| Current - Supply (x4 Channels) | 1 mA | — | — | 1.4 mA | 1.4 mA | 1.5 mA | 210 µA | 8 mA |
| Current - Output / Channel | 40 mA | 10 mA | 10 mA | 30 mA | 30 mA | 40 mA | 12 mA | 31 mA |
| Voltage - Supply Span (Min) | 3 V | 10 V | 10 V | 3 V | 3 V | 3 V | 9 V | 7 V |
| Voltage - Supply Span (Max) | 36 V | 30 V | 30 V | 30 V | 30 V | 30 V | 36 V | 36 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -40°C ~ 85°C | 0°C ~ 70°C |
| Product Status | Active | Active | Active | Active | Discontinued at DiGi Electronics | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
General Purpose Amplifier Substitutes (Recommended Primary Category)
The LM124DR, LM124DRG4, and LM124DT are direct functional equivalents to the AS324MTR-E1 within the general-purpose amplifier category. All three maintain the 14-SOIC package footprint, 4-circuit configuration, and surface mount compatibility. The LM124DR is the preferred substitute due to its active product status and highest inventory availability (171,766 units). The LM124DT offers identical input bias current and voltage offset specifications to the AS324MTR-E1 with enhanced output current capability (40 mA per channel). Both LM124DR and LM124DT support the full -40°C to 85°C operating temperature range of the AS324MTR-E1.
The ADA4004-4ARZ and ADA4004-4ARZ-R7 are general-purpose substitutes with enhanced performance characteristics. Both devices feature superior voltage input offset (40 µV versus 2 mV) and extended operating temperature range (-40°C to 125°C). However, these devices require a minimum supply voltage of 10V, which restricts their use in applications requiring 3V to 9V operation. The ADA4004-4ARZ-R7 is available in Cut Tape & Digi-Reel® packaging with 4,655 units in stock, while the ADA4004-4ARZ is supplied in Tube packaging with 1,495 units available.
J-FET Amplifier Substitutes (Alternative Category)
The AD8684ARZ and LF347BDR represent J-FET topology alternatives offering superior input bias current performance (6 pA and 50 pA respectively, compared to 20 nA for the AS324MTR-E1). The AD8684ARZ maintains compatibility with the full 9V to 36V supply range and -40°C to 85°C operating temperature. The LF347BDR operates across 7V to 36V supply range but is limited to 0°C to 70°C operating temperature, making it unsuitable for extended temperature applications.
Compliance & Availability Considerations
All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements equivalent to the AS324MTR-E1. The LM124DR offers the highest inventory availability and active product status, making it the optimal choice for immediate procurement. The ADA4004-4ARZ-R7 provides enhanced performance with active status and substantial inventory (4,655 units). The LF347BDR is available in active status with 4,007 units in Tape & Reel packaging.
Frequently Asked Questions (FAQ)
Q: Can the ADA4004-4ARZ be used as a direct replacement for the AS324MTR-E1 in all applications?
A: The ADA4004-4ARZ is functionally compatible in the 14-SOIC package and 4-circuit configuration. However, it requires a minimum supply voltage of 10V, whereas the AS324MTR-E1 operates from 3V. Applications using supply voltages between 3V and 9V require the LM124DR, LM124DT, or AD8684ARZ instead.
Q: What is the difference between the LM124DR and LM124DRG4?
A: Both devices are identical in electrical specifications and package format (14-SOIC). The LM124DRG4 is discontinued at DiGi Electronics with 5,600 units in stock, while the LM124DR maintains active product status with 171,766 units available. The LM124DR is the recommended choice for new designs.
Q: Why do J-FET substitutes like the AD8684ARZ have different input bias current specifications?
A: J-FET input stage topology inherently produces lower input bias current (6 pA for AD8684ARZ) compared to bipolar input stages (20 nA for AS324MTR-E1). This is a fundamental characteristic of the J-FET architecture and represents an improvement in input impedance performance. J-FET substitutes are suitable when low input bias current is a design requirement.
Q: Are the ADA4004-4ARZ and ADA4004-4ARZ-R7 electrically identical?
A: Yes, both devices are electrically identical with identical electrical specifications. The difference is packaging format: ADA4004-4ARZ is supplied in Tube packaging, while ADA4004-4ARZ-R7 is supplied in Cut Tape & Digi-Reel® packaging. Selection depends on manufacturing process requirements.
Q: Can the LF347BDR be used in applications requiring -40°C operation?
A: No. The LF347BDR operates from 0°C to 70°C, which does not include the -40°C minimum temperature of the AS324MTR-E1. Applications requiring -40°C operation must use the LM124DR, LM124DT, ADA4004-4ARZ, ADA4004-4ARZ-R7, or AD8684ARZ.
Q: What is the significance of MSL (Moisture Sensitivity Level) ratings in substitution?
A: MSL ratings indicate moisture sensitivity during storage and handling. The AS324MTR-E1 has MSL 3 (168 Hours), requiring controlled storage conditions. Substitutes with MSL 1 (Unlimited) offer superior moisture tolerance and may be preferable for applications with extended storage or humid environments. LM124 series devices and J-FET alternatives all feature MSL 1 ratings.
Q: Is the LM124DT suitable for applications requiring 40 mA output current per channel?
A: Yes. The LM124DT provides 40 mA output current per channel, matching the AS324MTR-E1 specification. The LM124DR and LM124DRG4 provide 30 mA per channel. For applications requiring maximum output current, the LM124DT is the appropriate substitute.
Q: What packaging options are available for the LM124 series substitutes?
A: The LM124DR is supplied in Cut Tape & Digi-Reel® packaging. The LM124DRG4 is supplied in Cut Tape & Digi-Reel® packaging (discontinued at DiGi Electronics). The LM124DT is supplied in Cut Tape & Digi-Reel® packaging. The AS324MTR-E1 original part is supplied in Tape & Reel (TR) packaging.
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