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OPA4131NJ Equivalent & Substitute Parts
Part Overview
The OPA4131NJ 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 OPA4131NJ serves applications requiring low input bias current and stable offset voltage characteristics across industrial temperature ranges. Substitute parts are identified when equivalent electrical performance parameters and compatible packaging options are required for design flexibility, inventory management, or supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 4 | — |
| Slew Rate | 10 | V/µs |
| Gain Bandwidth Product | 4 | MHz |
| Current - Input Bias | 50 | pA |
| Voltage - Input Offset | 1.5 | mV |
| Current - Supply (per 4 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 | — |
Substitute Part Grouping Explanation
Substitution of the OPA4131NJ is determined by the following critical parameters:
Primary Substitution Criteria:
- Amplifier Type: J-FET input configuration for low input bias current performance
- Number of Circuits: 4-circuit configuration
- Gain Bandwidth Product: 4 MHz minimum
- Slew Rate: 10 V/µs or greater
- Supply Voltage Range: Minimum 9 V to maximum 36 V overlap
- Output Current per Channel: 25 mA capability
- Input Bias Current: 50 pA or lower
- Operating Temperature: Overlap with -40°C to 85°C range
- Package Compatibility: Surface mount or through-hole alternatives with equivalent pinout
Substitute Categories:
Category 1: J-FET Direct Equivalents (Same Amplifier Type) Parts maintaining J-FET input architecture with 4-circuit configuration and compatible electrical specifications. These include 5962-9063301MCA and AD713AQ, which preserve the low input bias current characteristic essential for high-impedance signal conditioning applications.
Category 2: General Purpose Alternatives (Different Amplifier Type) Parts with General Purpose amplifier topology offering 4-circuit configuration and compatible supply voltage ranges. These include AD704 variants and 5962-8777101M3A, suitable for applications where J-FET input bias current performance is not critical.
Category 3: Specialized Performance Variants Part 5962-88565023A provides enhanced gain bandwidth product (6.5 MHz) and higher slew rate (8 V/µs) for applications requiring improved frequency response, with trade-offs in input bias current and supply current.
Parameter Comparison
| Parameter | OPA4131NJ | 5962-9063301MCA | AD713AQ | AD713JNZ | AD704ARZ-16 | AD704JRZ-16 | 5962-8777101M3A | 5962-88565023A |
|---|---|---|---|---|---|---|---|---|
| Amplifier Type | J-FET | J-FET | J-FET | J-FET | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Slew Rate (V/µs) | 10 | 20 | 20 | 20 | 0.1 | 0.1 | 0.15 | 8 |
| Gain Bandwidth Product (MHz) | 4 | 4 | 4 | 4 | 0.8 | 0.8 | 0.5 | 6.5 |
| Current - Input Bias (pA) | 50 | 10 | 10 | 10 | 100 | 100 | 750 | 7000 |
| Voltage - Input Offset (mV) | 1.5 | 0.3 | 0.3 | 0.3 | 0.05 | 0.05 | 0.04 | 0.25 |
| Current - Supply (mA) | 1.5 | 10 | 10 | 10 | 1.5 | 1.5 | 0.6 | 9.2 |
| Current - Output / Channel (mA) | 25 | 25 | 25 | 25 | 15 | 15 | — | — |
| Voltage - Supply Span Min (V) | 9 | 9 | 9 | 9 | 4 | 4 | 6 | 9 |
| Voltage - Supply Span Max (V) | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 |
| Operating Temperature (°C) | -40 to 85 | -55 to 125 | -40 to 85 | 0 to 70 | -40 to 85 | 0 to 70 | -55 to 125 | -55 to 125 |
| Package / Case | 14-SOIC | 14-CERDIP | 14-CERDIP | 14-DIP | 16-SOIC | 16-SOIC | 28-LCC | 28-LCC |
| Mounting Type | Surface Mount | Through Hole | Through Hole | Through Hole | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct J-FET Substitution with Enhanced Performance:
The 5962-9063301MCA and AD713AQ represent J-FET amplifier alternatives with identical 4-circuit configuration and 4 MHz gain bandwidth product. Both parts feature superior input bias current (10 pA versus 50 pA) and improved slew rate (20 V/µs versus 10 V/µs). The 5962-9063301MCA operates across extended temperature range (-55°C to 125°C) and is available in 14-CERDIP through-hole packaging. AD713AQ maintains the -40°C to 85°C operating range of the OPA4131NJ. AD713JNZ provides identical electrical specifications in 14-DIP through-hole package with narrower operating temperature (0°C to 70°C).
For Surface Mount Compatibility with Reduced Supply Current:
The AD704ARZ-16 and AD704JRZ-16 maintain 16-SOIC surface mount packaging with 4-circuit general purpose amplifier configuration. These parts deliver identical 1.5 mA supply current and -40°C to 85°C operating range. Trade-offs include reduced slew rate (0.1 V/µs), lower gain bandwidth product (0.8 MHz), and reduced output current per channel (15 mA). AD704JRZ-16 operates at 0°C to 70°C temperature range. Both parts are ROHS3 compliant with unlimited moisture sensitivity level.
For Extended Temperature and Compliance Requirements:
The 5962-8777101M3A provides general purpose amplifier configuration with extended operating temperature (-55°C to 125°C) and unlimited moisture sensitivity level. This part operates at reduced slew rate (0.15 V/µs) and gain bandwidth product (0.5 MHz) with higher input bias current (750 pA). The 28-LCC package differs from OPA4131NJ pinout.
For Enhanced Frequency Response Applications:
The 5962-88565023A delivers 6.5 MHz gain bandwidth product and 8 V/µs slew rate with extended temperature range (-55°C to 125°C). This part requires higher supply current (9.2 mA) and exhibits higher input bias current (7 nA) compared to OPA4131NJ. The 28-LCC package requires PCB layout modification.
All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with OPA4131NJ regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can AD704ARZ-16 directly replace OPA4131NJ in existing PCB layouts?
A: No. AD704ARZ-16 uses 16-SOIC packaging versus OPA4131NJ 14-SOIC packaging. Pinout differs: AD704 requires 16 pins while OPA4131NJ uses 14 pins. PCB redesign is required. Additionally, AD704 is general purpose amplifier type versus J-FET type of OPA4131NJ, resulting in different input bias current (100 pA versus 50 pA) and slew rate (0.1 V/µs versus 10 V/µs).
Q: What is the primary advantage of 5962-9063301MCA over OPA4131NJ?
A: The 5962-9063301MCA maintains J-FET amplifier type and 4-circuit configuration with identical 4 MHz gain bandwidth product. Advantages include lower input bias current (10 pA versus 50 pA), higher slew rate (20 V/µs versus 10 V/µs), and extended operating temperature range (-55°C to 125°C versus -40°C to 85°C). The trade-off is higher supply current (10 mA versus 1.5 mA) and different packaging (14-CERDIP through-hole versus 14-SOIC surface mount).
Q: Are AD713AQ and AD713JNZ electrically equivalent?
A: AD713AQ and AD713JNZ are electrically identical J-FET amplifiers with 4-circuit configuration, 4 MHz gain bandwidth product, 20 V/µs slew rate, and 10 pA input bias current. The difference is packaging and temperature range: AD713AQ uses 14-CERDIP through-hole with -40°C to 85°C operating range, while AD713JNZ uses 14-DIP through-hole with 0°C to 70°C operating range.
Q: Why does 5962-88565023A have higher supply current than OPA4131NJ?
A: The 5962-88565023A delivers enhanced gain bandwidth product (6.5 MHz versus 4 MHz) and higher slew rate (8 V/µs versus 10 V/µs). The increased supply current (9.2 mA versus 1.5 mA) reflects the higher performance capability. This part is suitable for applications requiring improved frequency response where increased power consumption is acceptable.
Q: Can OPA4131NJ be replaced with AD704 variants in high-impedance signal conditioning circuits?
A: Substitution requires circuit analysis. OPA4131NJ J-FET input provides 50 pA input bias current suitable for high-impedance sources. AD704 general purpose amplifier exhibits 100 pA input bias current, doubling the bias current specification. For applications with source impedance exceeding 10 MΩ, the increased bias current may introduce unacceptable offset errors. Verify circuit performance requirements before substitution.
Q: What packaging options are available for J-FET 4-circuit amplifiers equivalent to OPA4131NJ?
A: J-FET 4-circuit amplifiers with 4 MHz gain bandwidth product are available in: 14-SOIC surface mount (OPA4131NJ), 14-CERDIP through-hole (5962-9063301MCA, AD713AQ), and 14-DIP through-hole (AD713JNZ). Surface mount options are limited to OPA4131NJ in 14-SOIC package. Through-hole alternatives require PCB redesign for different pin spacing and package dimensions.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed (5962-9063301MCA, AD713AQ, AD713JNZ, AD704ARZ-16, AD704JRZ-16, AD704ARZ-16-REEL, AD704JRZ-16-REEL, 5962-8777101M3A, 5962-88565023A) are ROHS3 compliant and REACH unaffected, matching OPA4131NJ regulatory status.
Q: What is the moisture sensitivity level difference between OPA4131NJ and substitute parts?
A: OPA4131NJ has MSL 3 (168 Hours). Most substitute parts have MSL 1 (Unlimited), indicating superior moisture resistance. Lower MSL ratings provide extended shelf life and reduced risk of moisture-induced failures during storage and handling.
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