Request Quote
(Ships tomorrow)
OPA2137U Equivalent & Substitute Parts
Part Overview
The OPA2137U is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a dual-channel (2 circuit) device in 8-SOIC surface mount packaging. This device is classified as Last Time Buy, indicating discontinued production status. The OPA2137U operates across a wide supply voltage range of 4.5V to 36V with low input bias current of 5 pA, making it suitable for high-impedance signal conditioning applications. Due to its Last Time Buy status, equivalent and substitute parts are necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | OPA2137U Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 2 | — |
| Slew Rate | 3.5 | V/µs |
| Gain Bandwidth Product | 1 | MHz |
| Current - Input Bias | 5 | pA |
| Voltage - Input Offset | 1.5 | mV |
| Current - Supply | 220 | µA |
| Current - Output / Channel | 60 | mA |
| Voltage - Supply Span (Min) | 4.5 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 3 (168 Hours) | — |
Substitute Part Grouping Explanation
Substitution of the OPA2137U is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:
Critical Parameters for Substitution:
- Amplifier Type (J-FET vs. General Purpose)
- Number of Circuits (2 channels required)
- Package / Case (8-SOIC form factor mandatory)
- Mounting Type (Surface Mount)
- Supply Voltage Range compatibility (minimum 4.5V to 36V span or subset thereof)
- Input Bias Current (5 pA specification)
Substitution Categories:
Category 1: Direct J-FET Equivalents (Highest Compatibility) OPA2137U/2K5 is a Texas Instruments variant of the same base product (OPA2137) with identical electrical specifications and Active product status, providing direct substitution with improved availability.
Category 2: Enhanced J-FET Alternatives (Functional Substitutes) AD8512ARZ and its packaging variants (AD8512ARZ-REEL, AD8512ARZ-REEL7) are J-FET input dual-channel amplifiers in 8-SOIC packaging. These devices feature higher slew rate (20V/µs vs. 3.5V/µs), higher gain bandwidth product (8 MHz vs. 1 MHz), and lower input offset voltage (100 µV vs. 1.5 mV). Supply voltage range is 10V to 30V, which is a subset of the OPA2137U range. These are suitable where the narrower supply range is acceptable and enhanced performance is beneficial.
Category 3: General Purpose Alternatives (Functional Compatibility with Trade-offs) LM258ADT, LM258AYDT, LM258DT, LM2904AYDT, and LM2904DT are general purpose dual-channel amplifiers in 8-SOIC packaging. These devices operate across 3V to 30V or 3V to 32V supply ranges. Input bias current is 20 nA (higher than OPA2137U's 5 pA), and slew rates are lower (0.3V/µs to 0.6V/µs). These substitutes are applicable in applications where J-FET input characteristics are not critical.
Category 4: General Purpose Alternative (Lowest Supply Voltage) AP4310AMTR-G1 is a general purpose dual-channel amplifier with 3V to 36V supply range, matching the OPA2137U's maximum supply voltage. Input bias current is 20 nA, and slew rate is 0.5V/µs. This device offers the widest supply voltage compatibility among general purpose alternatives.
Parameter Comparison
| Parameter | OPA2137U | OPA2137U/2K5 | AD8512ARZ | LM258ADT | LM2904AYDT | AP4310AMTR-G1 |
|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Analog Devices Inc. | STMicroelectronics | STMicroelectronics | Diodes Incorporated |
| Amplifier Type | J-FET | J-FET | J-FET | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 |
| Slew Rate (V/µs) | 3.5 | 3.5 | 20 | 0.6 | 0.6 | 0.5 |
| Gain Bandwidth Product (MHz) | 1 | 1 | 8 | 1.1 | 1.1 | 1 |
| Current - Input Bias (pA) | 5 | 5 | 25 | 20 nA | 20 nA | 20 nA |
| Voltage - Input Offset (mV) | 1.5 | 1.5 | 0.1 | 1 | 1 | 0.5 |
| Current - Supply (µA) | 220 | 220 | 2200 | 700 | 700 | 150 |
| Current - Output / Channel (mA) | 60 | 60 | 70 | 40 | 40 | 40 |
| Voltage - Supply Span (Min - Max) | 4.5 - 36 V | 4.5 - 36 V | 10 - 30 V | 3 - 30 V | 3 - 30 V | 3 - 36 V |
| Operating Temperature | -40 to 85°C | -40 to 85°C | -40 to 125°C | -40 to 105°C | -40 to 125°C | -40 to 105°C |
| Package / Case | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Product Status | Last Time Buy | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) |
Engineering Selection Recommendations
For Direct Replacement (Recommended First Choice): OPA2137U/2K5 is the preferred substitute. It maintains identical electrical specifications and J-FET input characteristics while offering Active product status and improved long-term availability. This variant requires no circuit redesign and provides pin-for-pin compatibility.
For Enhanced Performance Applications: AD8512ARZ, AD8512ARZ-REEL, and AD8512ARZ-REEL7 are suitable when higher slew rate (20V/µs), higher bandwidth (8 MHz), and lower input offset voltage (100 µV) are beneficial. The narrower supply voltage range (10V to 30V) must be verified against circuit requirements. These devices maintain J-FET input characteristics. Moisture sensitivity is Level 1 (Unlimited), providing superior handling characteristics compared to the OPA2137U.
For General Purpose Applications with Wide Supply Range: AP4310AMTR-G1 supports the full 3V to 36V supply range and offers the lowest quiescent current (150 µA). This device is suitable for battery-powered or low-power applications where J-FET input bias current is not a critical specification.
For Automotive-Qualified Applications: LM258AYDT and LM2904AYDT carry AEC-Q100 qualification and are suitable for automotive-grade designs. Both maintain general purpose amplifier characteristics with 3V to 30V supply range.
For High-Volume, Cost-Optimized Designs: LM258DT and LM2904DT offer the highest inventory availability (125,300 and 125,400 units respectively) and are suitable for cost-sensitive applications where general purpose amplifier performance is acceptable.
Frequently Asked Questions (FAQ)
Q: Can OPA2137U/2K5 be used as a direct drop-in replacement for OPA2137U? A: Yes. OPA2137U/2K5 is a variant of the same base product with identical electrical specifications, J-FET input characteristics, and 8-SOIC packaging. It provides pin-for-pin compatibility and requires no circuit modifications.
Q: What is the key difference between J-FET and General Purpose amplifiers in this comparison? A: J-FET input amplifiers (OPA2137U, OPA2137U/2K5, AD8512ARZ) feature extremely low input bias current (5 pA to 25 pA), making them suitable for high-impedance signal sources. General Purpose amplifiers (LM258, LM2904, AP4310) have input bias currents of 20 nA, which is acceptable for lower-impedance applications but unsuitable for high-impedance circuits.
Q: Can I use AD8512ARZ if my circuit operates at 4.5V supply voltage? A: No. AD8512ARZ requires a minimum supply voltage of 10V. The OPA2137U/2K5 or OPA2137U must be used for 4.5V operation.
Q: What is the significance of Moisture Sensitivity Level (MSL)? A: MSL indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. MSL 1 (Unlimited) allows indefinite storage without special handling. MSL 3 (168 Hours) requires controlled storage and limits shelf life to 168 hours after opening the moisture barrier bag. AD8512ARZ variants offer superior handling characteristics with MSL 1.
Q: Are all substitute parts RoHS3 compliant? A: Yes. All parts listed in this comparison are ROHS3 Compliant, meeting environmental and hazardous substance restrictions.
Q: Which substitute offers the best performance for high-speed signal conditioning? A: AD8512ARZ provides the highest slew rate (20V/µs) and gain bandwidth product (8 MHz), along with the lowest input offset voltage (100 µV). This device is suitable for applications requiring faster signal response and higher accuracy compared to the OPA2137U.
Q: Can LM258ADT replace OPA2137U in a photodiode amplifier circuit? A: LM258ADT is not recommended for photodiode amplifier applications. Photodiode circuits require extremely low input bias current to minimize leakage current effects. LM258ADT's 20 nA input bias current is 4,000 times higher than OPA2137U's 5 pA specification, resulting in significant measurement errors. OPA2137U/2K5 or AD8512ARZ must be used for photodiode applications.
Q: What is the operating temperature range difference between OPA2137U and AD8512ARZ? A: OPA2137U operates from -40°C to 85°C, while AD8512ARZ operates from -40°C to 125°C. If the application requires operation above 85°C, AD8512ARZ is necessary.
Q: Are there packaging format differences among the AD8512 variants? A: AD8512ARZ is supplied in Tube packaging. AD8512ARZ-REEL and AD8512ARZ-REEL7 are supplied in Cut Tape (CT) & Digi-Reel® format. All three variants have identical electrical specifications and 8-SOIC package dimensions. Selection depends on assembly process requirements and tape reel specifications.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts