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OPA4131NA Equivalent & Substitute Parts
Part Overview
The OPA4131NA is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a 4-circuit integrated circuit in 14-SOIC surface mount packaging. This device is classified as Active product status and is ROHS3 compliant. The OPA4131NA serves applications requiring low input bias current, low input offset voltage, and moderate slew rate performance in compact surface mount form factors. Substitute parts are identified based on matching amplifier type, circuit count, supply voltage range, and electrical performance parameters within acceptable tolerances for equivalent circuit operation.
Substiute Parts
Key Parameters
| Parameter | OPA4131NA Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 4 | — |
| Slew Rate | 10 | V/µs |
| Gain Bandwidth Product | 4 | MHz |
| Current - Input Bias | 5 | pA |
| Voltage - Input Offset | 200 | µV |
| Current - Supply (x4 Channels) | 1.5 | mA |
| Current - Output / Channel | 25 | mA |
| Voltage - Supply Span (Min) | 9 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts for the OPA4131NA are identified based on the following critical parameters that determine functional equivalence:
Primary Matching Criteria:
- Amplifier Type: J-FET input configuration for low input bias current performance
- Number of Circuits: 4-circuit configuration
- Gain Bandwidth Product: 4 MHz nominal
- Supply Voltage Range: Minimum 9V to maximum 36V compatibility
- Output Current per Channel: 25 mA capability
- RoHS3 Compliance and Active product status
Acceptable Substitution Parameters:
- Slew Rate: 10 V/µs or higher (OPA4131NA baseline)
- Input Bias Current: 5 pA to 10 pA range
- Input Offset Voltage: 200 µV to 300 µV range
- Supply Current: 1.5 mA to 10 mA per channel
- Operating Temperature: -40°C to 85°C minimum coverage
Package Considerations: Surface mount 14-SOIC packaging is the primary form factor. Through-hole 14-CERDIP and 14-PDIP alternatives are listed for applications requiring different mounting technologies while maintaining electrical equivalence.
Parameter Comparison
| Parameter | OPA4131NA | 5962-9063301MCA | AD713AQ | AD713JNZ | Unit |
|---|---|---|---|---|---|
| Amplifier Type | J-FET | J-FET | J-FET | J-FET | — |
| Number of Circuits | 4 | 4 | 4 | 4 | — |
| Slew Rate | 10 | 20 | 20 | 20 | V/µs |
| Gain Bandwidth Product | 4 | 4 | 4 | 4 | MHz |
| Current - Input Bias | 5 | 10 | 10 | 10 | pA |
| Voltage - Input Offset | 200 | 300 | 300 | 300 | µV |
| Current - Supply (x4 Channels) | 1.5 | 10 | 10 | 10 | mA |
| Current - Output / Channel | 25 | 25 | 25 | 25 | mA |
| Voltage - Supply Span (Min) | 9 | 9 | 9 | 9 | V |
| Voltage - Supply Span (Max) | 36 | 36 | 36 | 36 | V |
| Operating Temperature | -40 to 85 | -55 to 125 | -40 to 85 | 0 to 70 | °C |
| Mounting Type | Surface Mount | Through Hole | Through Hole | Through Hole | — |
| Package / Case | 14-SOIC | 14-CERDIP | 14-CERDIP | 14-DIP | — |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | — |
Engineering Selection Recommendations
Surface Mount Applications (14-SOIC): The OPA4131NA remains the primary selection for surface mount PCB designs. No direct surface mount substitute with identical J-FET amplifier type and 4-circuit configuration is available in the provided substitute list. The device maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 3, 168 hours).
Through-Hole Alternatives (14-CERDIP / 14-PDIP): For applications requiring through-hole mounting technology, the following J-FET 4-circuit amplifiers provide electrical equivalence:
-
5962-9063301MCA (Analog Devices Inc., 14-CERDIP): Matches OPA4131NA electrical specifications with extended operating temperature range (-55°C to 125°C). Slew rate increased to 20 V/µs. Supply current elevated to 10 mA. MSL 1 rating provides superior moisture protection.
-
AD713AQ (Analog Devices Inc., 14-CERDIP): Identical electrical performance to 5962-9063301MCA. Operating temperature -40°C to 85°C matches OPA4131NA. MSL 1 rating.
-
AD713JNZ (Analog Devices Inc., 14-PDIP): J-FET 4-circuit configuration with 20 V/µs slew rate. Operating temperature limited to 0°C to 70°C. Suitable for commercial temperature range applications only.
General Purpose Amplifier Alternatives: The AD704 series (AD704ARZ-16, AD704ARZ-16-REEL, AD704JNZ, AD704JRZ-16, AD704JRZ-16-REEL) provides general purpose amplifier functionality with 4-circuit configuration. These devices feature lower slew rate (0.1 V/µs) and reduced input bias current (100 pA) compared to OPA4131NA J-FET performance. Selection of AD704 variants requires application-specific evaluation of bandwidth and slew rate requirements.
Compliance and Certification: All listed substitute parts maintain ROHS3 compliance, Active product status, and REACH unaffected designation. Moisture sensitivity levels vary; MSL 1 rated devices provide superior protection for extended storage and humid environments compared to OPA4131NA MSL 3 rating.
Frequently Asked Questions (FAQ)
Q: Can the OPA4131NA be replaced with an AD704 series amplifier?
A: AD704 series devices are general purpose amplifiers with different electrical characteristics. The AD704 features 0.1 V/µs slew rate (versus OPA4131NA 10 V/µs), 100 pA input bias current (versus 5 pA), and 800 kHz gain bandwidth product (versus 4 MHz). Substitution is not recommended without application-specific verification of bandwidth and slew rate requirements.
Q: What is the difference between 5962-9063301MCA and AD713AQ?
A: Both devices are J-FET 4-circuit amplifiers in 14-CERDIP packaging with identical electrical specifications (20 V/µs slew rate, 4 MHz bandwidth, 10 pA input bias current). The primary difference is operating temperature range: 5962-9063301MCA operates -55°C to 125°C, while AD713AQ operates -40°C to 85°C. Both maintain MSL 1 moisture sensitivity rating.
Q: Is the OPA4131NA suitable for surface mount assembly?
A: Yes. The OPA4131NA is specified for surface mount technology with 14-SOIC (0.154", 3.90mm width) packaging. No direct surface mount substitute with identical J-FET 4-circuit configuration is available in the provided substitute list. For surface mount applications, the OPA4131NA is the recommended selection.
Q: What are the key electrical differences between OPA4131NA and 5962-9063301MCA?
A: Both are J-FET 4-circuit amplifiers with 4 MHz gain bandwidth product and 9V to 36V supply range. OPA4131NA features 10 V/µs slew rate and 1.5 mA supply current. 5962-9063301MCA features 20 V/µs slew rate and 10 mA supply current. Input bias current increases from 5 pA to 10 pA, and input offset voltage increases from 200 µV to 300 µV. Operating temperature range extends from -40°C to 85°C to -55°C to 125°C.
Q: Can I use AD713JNZ in place of OPA4131NA?
A: AD713JNZ is a J-FET 4-circuit amplifier with matching electrical specifications (20 V/µs slew rate, 4 MHz bandwidth, 10 pA input bias current, 25 mA output current). However, operating temperature range is limited to 0°C to 70°C, which is narrower than OPA4131NA (-40°C to 85°C). Package is 14-PDIP through-hole instead of 14-SOIC surface mount. Substitution is suitable only for commercial temperature range applications requiring through-hole mounting.
Q: What does MSL rating mean for these amplifiers?
A: MSL (Moisture Sensitivity Level) indicates the device's sensitivity to moisture absorption during storage and handling. OPA4131NA is MSL 3 (168 hours maximum floor life at 30°C/60% RH). Substitute parts 5962-9063301MCA, AD713AQ, and AD713JNZ are MSL 1 (unlimited floor life), providing superior protection for extended storage in humid environments.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected designation, matching the OPA4131NA environmental compliance status.
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