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AD8601WARTZ-RL Equivalent & Substitute Parts
Part Overview
The AD8601WARTZ-RL is a general-purpose operational amplifier manufactured by Analog Devices Inc., designed for rail-to-rail output applications in a compact SOT-23-5 surface mount package. This device operates across a supply voltage range of 2.7 V to 5.5 V and is rated for automotive-grade applications with an operating temperature range of -40°C to 125°C. The part is currently in active production status with 634 units in stock.
Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining functional compatibility within specified electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 6 | V/µs |
| Gain Bandwidth Product | 8.4 | MHz |
| Current - Input Bias | 200 | nA |
| Voltage - Input Offset | 1.3 | mV |
| Current - Supply | 750 | µA |
| Current - Output / Channel | 50 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 125 | °C |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| Mounting Type | Surface Mount | — |
| Grade | Automotive | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the AD8601WARTZ-RL are classified based on functional equivalence within the following critical parameters:
Primary Substitution Criteria:
- Package compatibility: SOT-23-5 (SC-74A, SOT-753)
- Circuit configuration: Single general-purpose operational amplifier
- Output architecture: Rail-to-rail output capability
- Supply voltage range: Minimum 2.7 V to maximum 5.5 V overlap
- Operating temperature range: -40°C to 125°C minimum
- Surface mount technology
Secondary Compatibility Parameters:
- Slew rate: 6 V/µs or greater
- Gain bandwidth product: 8.4 MHz or greater
- Input bias current: 200 nA or lower
- Input offset voltage: 1.3 mV or lower
- Output current capability: 50 mA or greater per channel
- Supply current: 750 µA or lower
Substitutes are grouped into two categories: direct equivalents (identical base product number with different packaging) and similar alternatives (different manufacturers meeting functional requirements).
Parameter Comparison
| Part Number | Manufacturer | Slew Rate (V/µs) | GBW (MHz) | Input Bias (nA) | Input Offset (mV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AD8601WARTZ-RL | Analog Devices Inc. | 6 | 8.4 | 200 | 1.3 | 750 | 50 | 2.7 | 5.5 | -40 to 125 | SOT-23-5 |
| AD8601WARTZ-R7 | Analog Devices Inc. | 6 | 8.4 | 200 | 1.3 | 750 | 50 | 2.7 | 5.5 | -40 to 125 | SOT-23-5 |
| LMV821M5 | National Semiconductor | 2 | 5.6 | 40 | 1 | 300 | 45 | 2.5 | 5.5 | -40 to 85 | SOT-23-5 |
| LMV821M5/NOPB | National Semiconductor | 2 | 5.6 | 100 | 3.5 | 300 | 45 | 2.5 | 5.5 | -40 to 85 | SOT-23-5 |
| LMV821M5X/NOPB | National Semiconductor | 2 | 5.6 | 100 | 3.5 | 300 | — | 2.5 | 5.5 | -40 to 85 | SOT-23-5 |
| MAX4321EUK+T | Analog Devices Inc./Maxim Integrated | 2 | 5 | 50 | 1.2 | 725 | — | 2.4 | 6.5 | -40 to 85 | SOT-23-5 |
| MAX4322EUK+T | Analog Devices Inc./Maxim Integrated | 2 | 5 | 50 | 1.2 | 725 | — | 2.4 | 6.5 | -40 to 85 | SOT-23-5 |
| MCP6271T-E/OT | Microchip Technology | 0.9 | 2 | 1 | 3 | 170 | 25 | 2 | 6 | -40 to 125 | SOT-23-5 |
| MCP6281RT-E/OT | Microchip Technology | 2.5 | 5 | 1 | 3 | 450 | 25 | 2.2 | 6 | -40 to 125 | SOT-23-5 |
| MCP6281T-E/OT | Microchip Technology | 2.5 | 5 | 1 | 3 | 450 | 25 | 2.2 | 6 | -40 to 125 | SOT-23-5 |
| MCP6481T-E/OT | Microchip Technology | 2.7 | 4 | 1 | 1.5 | 240 | 12 | 2.2 | 5.5 | -40 to 125 | SOT-23-5 |
Engineering Selection Recommendations
Direct Equivalent (Preferred for Pin-Compatible Replacement):
The AD8601WARTZ-R7 is a direct equivalent to the AD8601WARTZ-RL, differing only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Both parts share identical electrical specifications and automotive-grade qualification. This part is suitable for direct substitution with 33,760 units in stock, providing superior availability.
Functional Alternatives with Trade-offs:
The LMV821M5 series (National Semiconductor) operates within the supply voltage range and maintains SOT-23-5 packaging. However, this family exhibits reduced slew rate (2 V/µs versus 6 V/µs) and lower gain bandwidth product (5.6 MHz versus 8.4 MHz). The operating temperature maximum is limited to 85°C, which does not meet the full -40°C to 125°C automotive specification of the AD8601WARTZ-RL. These parts are suitable only for applications where reduced bandwidth and lower temperature operation are acceptable.
The MAX4321EUK+T and MAX4322EUK+T (Analog Devices Inc./Maxim Integrated) provide extended supply voltage range (2.4 V to 6.5 V) and maintain automotive-grade status. Slew rate and gain bandwidth product are reduced (2 V/µs and 5 MHz respectively). Operating temperature is limited to -40°C to 85°C. These parts are suitable for applications requiring extended supply voltage tolerance where bandwidth reduction is acceptable.
The MCP6281T-E/OT and MCP6281RT-E/OT (Microchip Technology) offer full -40°C to 125°C operating temperature range and extended supply voltage range (2.2 V to 6 V). Slew rate is 2.5 V/µs and gain bandwidth product is 5 MHz. Output current per channel is limited to 25 mA. These parts are suitable for low-power applications where reduced output current is acceptable.
The MCP6271T-E/OT (Microchip Technology) provides the lowest supply current (170 µA) and extended supply voltage range (2 V to 6 V) with full temperature range support. However, slew rate (0.9 V/µs) and gain bandwidth product (2 MHz) are significantly reduced, and output current is limited to 25 mA. This part is suitable only for ultra-low-power applications where bandwidth and output current requirements are minimal.
The MCP6481T-E/OT (Microchip Technology) offers moderate slew rate (2.7 V/µs) and full temperature range support. Output current is limited to 12 mA, making this part unsuitable for applications requiring 50 mA output capability.
Compliance and Certification:
All listed substitute parts maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. The AD8601WARTZ-R7 maintains identical automotive-grade qualification to the primary part. National Semiconductor LMV821M5 series carries AEC-Q100 automotive qualification. Microchip Technology parts do not carry explicit automotive-grade designation in the provided specifications.
Frequently Asked Questions (FAQ)
Q: Can the AD8601WARTZ-R7 be used as a direct replacement for the AD8601WARTZ-RL?
A: Yes. The AD8601WARTZ-R7 is electrically and functionally identical to the AD8601WARTZ-RL. The only difference is packaging format: AD8601WARTZ-R7 is supplied in Cut Tape & Digi-Reel® format, while AD8601WARTZ-RL is supplied in Tape & Reel format. Both parts are suitable for automated assembly processes and carry identical electrical specifications and automotive-grade qualification.
Q: What are the key limitations when substituting with LMV821M5 series parts?
A: The LMV821M5 series exhibits three significant limitations: (1) reduced slew rate of 2 V/µs compared to 6 V/µs in the AD8601WARTZ-RL, affecting transient response speed; (2) lower gain bandwidth product of 5.6 MHz versus 8.4 MHz, limiting frequency response; (3) maximum operating temperature of 85°C, which does not meet the full automotive temperature range of -40°C to 125°C specified for the AD8601WARTZ-RL. These parts are suitable only for applications where reduced bandwidth and lower temperature operation are acceptable.
Q: Are all substitute parts suitable for automotive applications?
A: No. The AD8601WARTZ-RL and AD8601WARTZ-R7 carry explicit automotive-grade designation. The LMV821M5 series carries AEC-Q100 automotive qualification. The MAX4321EUK+T and MAX4322EUK+T are listed as automotive-grade. The Microchip Technology MCP series parts (MCP6271T-E/OT, MCP6281RT-E/OT, MCP6281T-E/OT, MCP6481T-E/OT) do not carry explicit automotive-grade designation in the provided specifications. Application of non-automotive-grade parts in automotive systems requires design review and qualification.
Q: What is the impact of reduced output current capability in substitute parts?
A: The AD8601WARTZ-RL provides 50 mA output current per channel. The LMV821M5 series provides 45 mA, which is acceptable for most applications. The Microchip Technology MCP6281 series provides 25 mA, and the MCP6271T-E/OT provides 25 mA. The MCP6481T-E/OT provides only 12 mA. Applications requiring 50 mA output current cannot use parts with lower output current ratings. Verify load impedance and current requirements before substitution.
Q: Can substitute parts with extended supply voltage range (2.4 V to 6.5 V) be used in designs specified for 2.7 V to 5.5 V?
A: Yes. Extended supply voltage range is a superset of the original specification. Parts with supply voltage range of 2.4 V to 6.5 V (such as MAX4321EUK+T and MAX4322EUK+T) are compatible with designs specified for 2.7 V to 5.5 V operation. However, verify that circuit design does not depend on the original supply voltage limits.
Q: What is the significance of input bias current differences among substitute parts?
A: The AD8601WARTZ-RL specifies 200 nA input bias current. The LMV821M5 specifies 40 nA, the MAX4321/MAX4322 series specify 50 nA, and the Microchip Technology MCP series specify 1 pA. Lower input bias current reduces input offset current errors and is generally beneficial. However, circuit designs optimized for 200 nA bias current may require recalibration if substituted with parts exhibiting significantly lower bias current (such as 1 pA in MCP series).
Q: Is the SOT-23-5 package identical across all listed parts?
A: Yes. All listed parts use the SOT-23-5 package (also designated SC-74A or SOT-753). Pin assignments and physical dimensions are identical, allowing direct PCB footprint compatibility. However, verify pinout documentation for each specific part number, as some manufacturers may use different pin designations for internal circuit variations.
Q: What supply current considerations apply when selecting substitute parts?
A: The AD8601WARTZ-RL draws 750 µA supply current. The LMV821M5 series draws 300 µA, providing 60% reduction in power consumption. The MAX4321/MAX4322 series draw 725 µA, nearly identical to the original. The MCP6271T-E/OT draws only 170 µA, providing 77% reduction. The MCP6281 series draws 450 µA, and the MCP6481T-E/OT draws 240 µA. Lower supply current is beneficial for battery-powered applications but does not affect functionality in line-powered designs.
Q: Are there any moisture sensitivity or RoHS compliance concerns with substitute parts?
A: All listed parts maintain MSL Level 1 (Unlimited) moisture sensitivity rating and RoHS3 compliance. No additional handling precautions are required beyond standard ESD protection. All parts are suitable for standard PCB assembly processes without special moisture bake-out procedures.
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