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TLV2781IDBVT Equivalent & Substitute Parts
Part Overview
The TLV2781IDBVT is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This rail-to-rail output amplifier operates across a supply voltage range of 1.8 V to 3.6 V and is designed for low-power applications requiring single-circuit amplification. The device is active and in production, with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within the specified parameter constraints.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| Mounting Type | Surface Mount | — |
| Voltage - Supply Span (Min) | 1.8 | V |
| Voltage - Supply Span (Max) | 3.6 | V |
| Operating Temperature | -40 to 125 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the TLV2781IDBVT is determined by the following critical parameters:
Mechanical Compatibility:
- Package type: SOT-23-5 (SC-74A, SOT-753)
- Mounting type: Surface Mount
- Pin count and footprint equivalence
Electrical Compatibility:
- Amplifier type: General Purpose
- Number of circuits: 1
- Output type: Rail-to-Rail
- Supply voltage range: Minimum 1.8 V, Maximum 3.6 V (substitute must support this range or broader)
- Operating temperature range: -40°C to 125°C
Regulatory & Quality:
- RoHS3 compliance
- MSL rating: 1 (Unlimited)
- Active product status
Substitute parts are grouped into two categories based on supply voltage compatibility:
Category A (Voltage-Compatible Substitutes): Parts with supply voltage ranges that encompass or exceed the TLV2781IDBVT range (1.8 V to 3.6 V). These include AD8601 variants and MCP6281/MCP6481 series.
Category B (Limited Voltage Substitutes): Parts with minimum supply voltage above 1.8 V. These include MAX4321EUK+T and MAX4322EUK+T, which require minimum 2.4 V operation.
Parameter Comparison
| Part Number | Manufacturer | Slew Rate (V/µs) | Gain Bandwidth Product (MHz) | Input Bias Current (pA) | Input Offset Voltage (µV) | Supply Current (µA) | Output Current / Channel (mA) | Supply Voltage Min (V) | Supply Voltage Max (V) | Operating Temp (°C) | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TLV2781IDBVT | Texas Instruments | 5 | 8 | 2.5 | 250 | 650 | 23 | 1.8 | 3.6 | -40 to 125 | Tape & Reel (TR) |
| AD8601ARTZ-R2 | Analog Devices Inc. | 6 | 8.4 | 0.2 | 80 | 750 | 50 | 2.7 | 5.5 | -40 to 125 | Cut Tape (CT) & Digi-Reel® |
| AD8601ARTZ-REEL | Analog Devices Inc. | 6 | 8.4 | 0.2 | 80 | 750 | 50 | 2.7 | 5.5 | -40 to 125 | Cut Tape (CT) & Digi-Reel® |
| AD8601ARTZ-REEL7 | Analog Devices Inc. | 6 | 8.4 | 0.2 | 80 | 750 | 50 | 2.7 | 5.5 | -40 to 125 | Cut Tape (CT) & Digi-Reel® |
| AD8601WARTZ-R7 | Analog Devices Inc. | 6 | 8.4 | 200 | 1300 | 750 | 50 | 2.7 | 5.5 | -40 to 125 | Cut Tape (CT) & Digi-Reel® |
| AD8601WDRTZ-REEL7 | Analog Devices Inc. | 6 | 8.4 | 0.2 | 1300 | 750 | 50 | 2.7 | 5.5 | -40 to 125 | Cut Tape (CT) & Digi-Reel® |
| MAX4321EUK+T | Analog Devices Inc./Maxim Integrated | 2 | 5 | 50 | 1200 | 725 | — | 2.4 | 6.5 | -40 to 85 | Tape & Reel (TR) |
| MAX4322EUK+T | Analog Devices Inc./Maxim Integrated | 2 | 5 | 50 | 1200 | 725 | — | 2.4 | 6.5 | -40 to 85 | Tape & Reel (TR) |
| MCP6281RT-E/OT | Microchip Technology | 2.5 | 5 | 1 | 3000 | 450 | 25 | 2.2 | 6 | -40 to 125 | Tape & Reel (TR) |
| MCP6281T-E/OT | Microchip Technology | 2.5 | 5 | 1 | 3000 | 450 | 25 | 2.2 | 6 | -40 to 125 | Cut Tape (CT) & Digi-Reel® |
| MCP6481T-E/OT | Microchip Technology | 2.7 | 4 | 1 | 1500 | 240 | 12 | 2.2 | 5.5 | -40 to 125 | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Substitutes (Recommended for Direct Replacement):
The AD8601 series (AD8601ARTZ-R2, AD8601ARTZ-REEL, AD8601ARTZ-REEL7) provides the closest electrical performance match to the TLV2781IDBVT. These parts maintain identical operating temperature range (-40°C to 125°C), RoHS3 compliance, and MSL 1 rating. The AD8601 variants offer improved input bias current (0.2 pA vs. 2.5 pA) and lower input offset voltage (80 µV vs. 250 µV). However, the minimum supply voltage is 2.7 V, which exceeds the TLV2781IDBVT minimum of 1.8 V. These substitutes are suitable for applications where the supply voltage remains at or above 2.7 V.
Secondary Substitutes (Conditional Compatibility):
The MCP6281T-E/OT and MCP6281RT-E/OT (Microchip Technology) support the full operating temperature range and maintain RoHS3 compliance. These parts operate from 2.2 V minimum, closer to the TLV2781IDBVT specification. The MCP6481T-E/OT offers the lowest supply current (240 µA) among substitutes, beneficial for power-constrained applications, though it operates from 2.2 V minimum.
The MAX4321EUK+T and MAX4322EUK+T (Analog Devices Inc./Maxim Integrated) require minimum 2.4 V operation and support only -40°C to 85°C temperature range, limiting their use to applications not requiring the full 125°C upper temperature specification.
Compliance Verification:
All substitute parts listed maintain RoHS3 compliance and MSL 1 (Unlimited) rating, ensuring regulatory equivalence. All parts are active products in production status. Package compatibility (SOT-23-5) is confirmed across all substitutes.
Supply Voltage Constraint:
Applications requiring operation below 2.2 V have no direct substitutes from the provided list. The TLV2781IDBVT remains the only option for 1.8 V minimum supply voltage operation.
Frequently Asked Questions (FAQ)
Q: Can the AD8601ARTZ-REEL7 replace the TLV2781IDBVT in all applications?
A: The AD8601ARTZ-REEL7 is mechanically and electrically compatible for applications where the supply voltage is 2.7 V or higher. If your circuit operates at 1.8 V to 2.6 V, the AD8601 series cannot be used. Verify your supply voltage specification before substitution.
Q: What is the difference between AD8601ARTZ-R2, AD8601ARTZ-REEL, and AD8601ARTZ-REEL7?
A: These three AD8601 variants are electrically identical. The differences are in packaging format: AD8601ARTZ-R2 is supplied in Cut Tape with Digi-Reel®, AD8601ARTZ-REEL is supplied in Cut Tape with Digi-Reel®, and AD8601ARTZ-REEL7 is supplied in Cut Tape with Digi-Reel®. Select based on your procurement and assembly requirements.
Q: Why does the MCP6481T-E/OT have lower supply current than the TLV2781IDBVT?
A: The MCP6481T-E/OT is designed for ultra-low-power applications with a supply current of 240 µA compared to the TLV2781IDBVT at 650 µA. This lower current consumption comes with trade-offs in gain bandwidth product (4 MHz vs. 8 MHz) and output current capability (12 mA vs. 23 mA). Select this part only if power consumption is a primary design constraint.
Q: Are the MAX4321EUK+T and MAX4322EUK+T suitable for automotive applications?
A: The MAX4321EUK+T and MAX4322EUK+T are not designated as automotive-grade parts. The AD8601WARTZ-R7 and AD8601WDRTZ-REEL7 carry automotive grade designation. If automotive qualification is required, use the AD8601W variants.
Q: What is the impact of using a substitute with higher input offset voltage?
A: Input offset voltage affects DC accuracy in precision applications. The TLV2781IDBVT has 250 µV offset. Substitutes like MCP6281T-E/OT (3000 µV) and MAX4321EUK+T (1200 µV) have higher offsets. For applications requiring offset trimming or where DC precision is critical, verify that the higher offset voltage is acceptable for your circuit design.
Q: Can I use MCP6281T-E/OT in place of TLV2781IDBVT for high-speed applications?
A: The MCP6281T-E/OT has a gain bandwidth product of 5 MHz compared to the TLV2781IDBVT at 8 MHz. For applications requiring bandwidth above 5 MHz, the MCP6281 series is not suitable. The AD8601 series (8.4 MHz) is a better choice for higher-speed requirements.
Q: Is the SOT-23-5 package footprint identical across all substitutes?
A: Yes. All substitute parts use the SOT-23-5 package (SC-74A, SOT-753 case designation). The physical footprint, pin spacing, and PCB layout are identical. No PCB redesign is required for package compatibility.
Q: What is the temperature range limitation of MAX4321EUK+T?
A: The MAX4321EUK+T operates from -40°C to 85°C, which is 40°C below the TLV2781IDBVT upper limit of 125°C. Applications requiring operation above 85°C cannot use this substitute.
Q: Are all substitutes RoHS3 compliant?
A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the TLV2781IDBVT compliance profile.
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