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OPA338NA/3K Equivalent & Substitute Parts
Part Overview
The OPA338NA/3K is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-circuit, rail-to-rail output amplifier operates across a 2.7 V to 5.5 V supply range with an operating temperature span of -40°C to 85°C. The device is classified as Active product status and carries ROHS3 compliance with Moisture Sensitivity Level 2 (1 Year). Substitute parts are identified when equivalent functional performance, package compatibility, and electrical parameter ranges align with application requirements while maintaining compliance certifications.
Substiute Parts
Key Parameters
| Parameter | OPA338NA/3K | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 4.6 | V/µs |
| Gain Bandwidth Product | 12.5 | MHz |
| Current - Input Bias | 0.2 | pA |
| Voltage - Input Offset | 500 | µV |
| Current - Supply | 525 | µA |
| Current - Output / Channel | 9 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 2 (1 Year) | — |
Substitute Part Grouping Explanation
Substitute parts for the OPA338NA/3K are selected based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:
Package Compatibility: All substitute parts must use SOT-23-5 package (SC-74A, SOT-753 case) to ensure direct board-level replacement without layout modifications.
Supply Voltage Range: Substitute parts must support the minimum 2.7 V and maximum 5.5 V supply span of the OPA338NA/3K, or exceed these limits to maintain backward compatibility.
Output Configuration: Rail-to-rail output type is required for direct functional substitution in applications designed for the OPA338NA/3K.
Single Circuit Configuration: All substitutes must contain exactly one operational amplifier circuit per package.
Compliance Requirements: All substitute parts must maintain ROHS3 compliance and EAR99 ECCN classification to satisfy regulatory and export requirements.
Functional Performance: Substitute parts are grouped by their ability to operate within the electrical parameter envelope defined by the OPA338NA/3K, including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current capabilities.
Parameter Comparison
| Part Number | Manufacturer | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Input Offset (µV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Output Type | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OPA338NA/3K | Texas Instruments | 4.6 | 12.5 | 0.2 | 500 | 525 | 9 | 2.7 | 5.5 | -40 to 85 | Rail-to-Rail | SOT-23-5 |
| LMP7717MF/NOPB | Texas Instruments | 35 | 88 | 0.1 | 10 | 1150 | 60 | 1.8 | 5.5 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
| LMP7717MFE/NOPB | Texas Instruments | 35 | 88 | 0.1 | 10 | 1150 | 60 | 1.8 | 5.5 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
| LMP7717MFX/NOPB | Texas Instruments | 35 | 88 | 0.1 | 10 | 1150 | 60 | 1.8 | 5.5 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
| LMV751M5/NOPB | Texas Instruments | 2.3 | 5 | 1.5 | 50 | 600 | — | 2.7 | 5 | -40 to 85 | — | SOT-23-5 |
| ADA4891-1ARJZ-R7 | Analog Devices Inc. | 210 | 240 | 2 | 2500 | 4400 | 125 | 2.7 | 5.5 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
| ADA4891-1ARJZ-RL | Analog Devices Inc. | 210 | 240 | 2 | 2500 | 4400 | 125 | 2.7 | 5.5 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
| MCP6291RT-E/OT | Microchip Technology | 7 | 10 | 1 | 3000 | 1000 | 25 | 2.4 | 6 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
| MCP661T-E/OT | Microchip Technology | 32 | 60 | 6 | 1800 | 6000 | — | 2.5 | 5.5 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
| MCP6L91RT-E/OT | Microchip Technology | 7 | 10 | 1 | 1000 | 850 | — | 2.4 | 6 | -40 to 125 | Rail-to-Rail | SOT-23-5 |
Engineering Selection Recommendations
Direct Substitution Candidates (Equivalent Performance Envelope):
The LMP7717 series (LMP7717MF/NOPB, LMP7717MFE/NOPB, LMP7717MFX/NOPB) from Texas Instruments provides superior performance across slew rate (35 V/µs vs. 4.6 V/µs), gain bandwidth product (88 MHz vs. 12.5 MHz), and input offset voltage (10 µV vs. 500 µV). These parts maintain rail-to-rail output, SOT-23-5 package compatibility, and ROHS3 compliance. Extended operating temperature range (-40°C to 125°C) and improved moisture sensitivity level (MSL 1, Unlimited) provide enhanced reliability. Supply voltage range extends to 1.8 V minimum, exceeding OPA338NA/3K requirements.
Performance-Enhanced Substitutes:
The ADA4891-1ARJZ-R7 and ADA4891-1ARJZ-RL from Analog Devices Inc. deliver significantly higher performance specifications: 210 V/µs slew rate, 240 MHz bandwidth, and 125 mA output current. These parts maintain SOT-23-5 package, rail-to-rail output, and 2.7 V to 5.5 V supply compatibility. ROHS3 compliance and MSL 1 rating are maintained. Extended temperature range (-40°C to 125°C) supports broader application environments.
Conservative Substitutes (Reduced Performance):
The LMV751M5/NOPB from Texas Instruments operates within a narrower performance envelope with 2.3 V/µs slew rate and 5 MHz bandwidth. This part maintains 2.7 V to 5 V supply range and -40°C to 85°C operating temperature alignment with OPA338NA/3K. ROHS3 compliance is maintained. Output type specification is not provided in available data.
Microchip Technology Alternatives:
The MCP6291RT-E/OT and MCP6L91RT-E/OT provide rail-to-rail output in SOT-23-5 packages with extended supply voltage range (2.4 V to 6 V) and -40°C to 125°C operating temperature. MCP6L91RT-E/OT offers improved input offset voltage (1 mV vs. 3 mV) and lower supply current (850 µA vs. 1 mA). The MCP661T-E/OT delivers higher slew rate (32 V/µs) and bandwidth (60 MHz) with rail-to-rail output capability.
Compliance Verification:
All listed substitute parts maintain ROHS3 compliance, EAR99 ECCN classification, and REACH Unaffected status, satisfying regulatory requirements equivalent to the OPA338NA/3K.
Frequently Asked Questions (FAQ)
Q: Can LMP7717MF/NOPB directly replace OPA338NA/3K on existing PCBs?
A: Yes. Both parts use identical SOT-23-5 package (SC-74A, SOT-753 case) with matching pinout. Pin-for-pin replacement is possible without PCB layout modification. Electrical performance of LMP7717MF/NOPB exceeds OPA338NA/3K specifications across all measured parameters.
Q: What is the primary difference between LMP7717MF/NOPB, LMP7717MFE/NOPB, and LMP7717MFX/NOPB?
A: These three variants are electrically identical. The difference lies in packaging format: LMP7717MF/NOPB is supplied in Tape & Reel (TR), LMP7717MFE/NOPB in Tape & Reel (TR), and LMP7717MFX/NOPB in Cut Tape (CT). All three maintain identical electrical specifications and SOT-23-5 package compatibility.
Q: Does the ADA4891-1ARJZ-RL operate within the same supply voltage range as OPA338NA/3K?
A: Yes. ADA4891-1ARJZ-RL supports 2.7 V to 5.5 V supply range, matching OPA338NA/3K requirements exactly. The part is rated for -40°C to 125°C operating temperature, extending the upper limit by 40°C compared to OPA338NA/3K.
Q: Why does MCP6291RT-E/OT have a lower maximum supply voltage specification than OPA338NA/3K?
A: MCP6291RT-E/OT supports 2.4 V to 6 V supply range, which exceeds the OPA338NA/3K maximum of 5.5 V. The 6 V maximum rating provides additional headroom for applications requiring higher supply voltages while maintaining compatibility with 5.5 V systems.
Q: Is LMV751M5/NOPB suitable as a direct substitute for all OPA338NA/3K applications?
A: LMV751M5/NOPB maintains SOT-23-5 package and 2.7 V to 5 V supply range compatibility. However, reduced slew rate (2.3 V/µs vs. 4.6 V/µs) and lower gain bandwidth product (5 MHz vs. 12.5 MHz) limit suitability to applications with relaxed bandwidth requirements. Output type specification is not provided in available data.
Q: What is the moisture sensitivity level difference between OPA338NA/3K and substitute parts?
A: OPA338NA/3K carries MSL 2 (1 Year) rating. Most substitute parts, including LMP7717 series and ADA4891 series, carry MSL 1 (Unlimited) rating, indicating superior moisture resistance and extended shelf life without baking requirements.
Q: Can MCP661T-E/OT replace OPA338NA/3K in high-speed applications?
A: MCP661T-E/OT provides 32 V/µs slew rate and 60 MHz bandwidth, both exceeding OPA338NA/3K specifications. Supply voltage range (2.5 V to 5.5 V) and operating temperature (-40°C to 125°C) are compatible. Output current specification is not provided in available data. ROHS3 compliance is maintained.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the regulatory status of OPA338NA/3K. EAR99 ECCN and REACH Unaffected classifications are maintained across all alternatives.
Q: What is the inventory availability difference between OPA338NA/3K and its substitutes?
A: OPA338NA/3K has 6000 pieces in stock. Among substitutes, MCP6L91RT-E/OT offers highest availability (25100 pieces), followed by ADA4891-1ARJZ-RL (15400 pieces) and ADA4891-1ARJZ-R7 (12100 pieces). LMP7717 variants range from 1400 to 3300 pieces.
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