OPA4137PA Equivalent & Substitute Parts

Part Overview

The OPA4137PA is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a 4-circuit integrated circuit in a 14-DIP through-hole package. This device is classified as Last Time Buy, indicating discontinued production with limited availability. The OPA4137PA belongs to the MicroAmplifier™ series and is designed for applications requiring low input bias current and low input offset voltage characteristics inherent to J-FET amplifier topology.

Substitute parts are necessary due to the Last Time Buy status of the OPA4137PA. Alternative equivalent devices maintain the same functional specifications while offering either improved product status (Active), different packaging options for modern assembly processes, or enhanced performance parameters within the J-FET amplifier category.

Substiute Parts

OPA4137PA

Texas InstrumentsIn Stock: 2188OPA4137PA Datasheet

Current PartRFQ

OPA4137U/2K5

Texas InstrumentsIn Stock: 9513OPA4137U/2K5 Datasheet

MFR RecommendedRFQ

LF444ACN/NOPB

Texas InstrumentsIn Stock: 2289LF444ACN/NOPB Datasheet

MFR RecommendedRFQ

LT1465CN

Analog Devices Inc.In Stock: 1469LT1465CN Datasheet

MFR RecommendedRFQ

OP482GPZ

Analog Devices Inc.In Stock: 1478OP482GPZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the OPA4137PA is based on the following criteria:

Primary Substitution Criteria:

• Amplifier Type: J-FET (required for input bias current and offset voltage characteristics)
• Number of Circuits: 4 (functional equivalence)
• Gain Bandwidth Product: 1 MHz (performance baseline)
• Package compatibility: 14-DIP through-hole or 14-SOIC surface mount variants

Substitution Categories:

1. Direct Package Equivalent (Same DIP, Active Status): Parts maintaining 14-DIP through-hole packaging with Active product status, suitable for direct replacement in existing designs.

2. Surface Mount Alternative (14-SOIC): OPA4137U/2K5 provides identical electrical specifications in surface-mount packaging for modern PCB assembly processes.

3. Performance-Enhanced Alternatives: Parts with improved slew rate, gain bandwidth product, or input offset voltage while maintaining J-FET topology and 4-circuit configuration.

4. Extended Temperature Range Alternatives: Parts supporting the full -40°C to 85°C operating range required for industrial applications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement (Same Package):

Select OP482GPZ when the application requires extended temperature range (-40°C to 85°C) and can benefit from enhanced performance specifications. The OP482GPZ maintains 14-DIP through-hole packaging, Active product status, and provides superior slew rate (9 V/µs) and gain bandwidth product (4 MHz) compared to the OPA4137PA. This device is suitable for designs requiring higher bandwidth or faster transient response.

Select LF444ACN/NOPB for cost-optimized applications where operating temperature is limited to 0°C to 70°C and the reduced slew rate (1 V/µs) is acceptable. This device maintains 14-DIP through-hole packaging and Active product status with lower supply current requirements.

For Surface-Mount Assembly:

Select OPA4137U/2K5 when transitioning to surface-mount technology while maintaining identical electrical specifications to the original OPA4137PA. This device provides 14-SOIC packaging with Active product status and is supplied in Tape & Reel format for automated assembly processes.

For Low Input Bias Current Applications:

Select LT1465CN when the application requires exceptionally low input bias current (0.5 pA) and low input offset voltage (600 µV). This device operates within 0°C to 70°C temperature range and provides reduced supply current (145 µA) for power-sensitive applications.

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the original OPA4137PA.

Frequently Asked Questions (FAQ)

Q: Can OPA4137U/2K5 replace OPA4137PA in existing through-hole PCB designs?

A: No. The OPA4137U/2K5 uses 14-SOIC surface-mount packaging, while the OPA4137PA uses 14-DIP through-hole packaging. These packages are not mechanically compatible with the same PCB footprint. The OPA4137U/2K5 requires PCB redesign for surface-mount assembly.

Q: What is the key difference between OP482GPZ and OPA4137PA?

A: The OP482GPZ provides higher slew rate (9 V/µs versus 3.5 V/µs) and higher gain bandwidth product (4 MHz versus 1 MHz). Both devices maintain 14-DIP through-hole packaging and support the full -40°C to 85°C operating temperature range. The OP482GPZ is suitable for applications requiring faster signal processing.

Q: Is LF444ACN/NOPB suitable for industrial temperature range applications?

A: No. The LF444ACN/NOPB operates within 0°C to 70°C, which does not cover the full industrial temperature range of -40°C to 85°C supported by the OPA4137PA. For industrial applications requiring extended temperature range, select OP482GPZ or OPA4137U/2K5.

Q: Why does LT1465CN have lower input bias current than OPA4137PA?

A: The LT1465CN is designed with enhanced input stage characteristics that achieve 0.5 pA input bias current compared to 5 pA for the OPA4137PA. This represents superior input impedance performance, beneficial for high-impedance signal sources. However, the LT1465CN is limited to 0°C to 70°C operating temperature.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (OPA4137U/2K5, LF444ACN/NOPB, LT1465CN, and OP482GPZ) are ROHS3 Compliant, consistent with the original OPA4137PA.

Q: What is the supply current difference between OPA4137PA and LT1465CN?

A: The OPA4137PA requires 220 µA total supply current, while the LT1465CN requires 145 µA. The LT1465CN provides approximately 34% lower supply current, making it suitable for battery-powered or power-constrained applications.

Q: Can OP482GPZ be used as a direct pin-compatible replacement?

A: Yes. The OP482GPZ maintains 14-DIP through-hole packaging with identical pin configuration to the OPA4137PA. It is a direct pin-compatible replacement with improved performance specifications and Active product status.