EL2126CSZ-T13 Equivalent & Substitute Parts

Part Overview

The EL2126CSZ-T13 is a voltage feedback amplifier manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface mount package. This linear amplifier integrated circuit features a single amplification circuit with a slew rate of 150V/µs and -3dB bandwidth of 135 MHz. The device operates across a supply voltage range of 5V to 30V and is rated for temperatures from -40°C to 85°C.

The EL2126CSZ-T13 carries an Obsolete product status. Locating equivalent and substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for systems utilizing this amplifier.

Substiute Parts

EL2126CSZ-T13

Renesas Electronics CorporationIn Stock: 1064EL2126CSZ-T13 Datasheet

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LM7121IM/NOPB

Texas InstrumentsIn Stock: 1174LM7121IM/NOPB Datasheet

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LM7121IMX/NOPB

Texas InstrumentsIn Stock: 2020LM7121IMX/NOPB Datasheet

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THS4031CD

Texas InstrumentsIn Stock: 1872THS4031CD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the EL2126CSZ-T13 is determined by compatibility across the following critical parameters:

Package and Mounting Compatibility: All substitute parts must use the 8-SOIC surface mount package with identical 0.154" (3.90mm) width to ensure direct PCB footprint compatibility.

Amplifier Architecture: All candidates must be voltage feedback amplifier topologies with a single circuit configuration.

Electrical Operating Range: Substitute parts must support the required supply voltage span. The EL2126CSZ-T13 operates from 5V to 30V; substitute parts must accommodate this range or provide compatible overlap.

Functional Performance Envelope: Slew rate, bandwidth, input bias current, input offset voltage, supply current, and output current capacity define the functional performance envelope. Substitute parts may exceed these specifications while maintaining functional equivalence.

Temperature Rating: Operating temperature range must support the -40°C to 85°C specification or provide compatible coverage.

Compliance and Certifications: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to ensure regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

LM7121IM/NOPB and LM7121IMX/NOPB (Texas Instruments): Both variants are Active status products with identical electrical specifications. These parts provide superior performance characteristics compared to the EL2126CSZ-T13, including higher slew rate (1300V/µs versus 150V/µs) and greater bandwidth (235 MHz versus 135 MHz). Supply voltage compatibility spans 4.5V to 33V, which encompasses the EL2126CSZ-T13 operating range of 5V to 30V. Operating temperature range matches the original specification (-40°C to 85°C). Both parts maintain ROHS3 compliance and feature improved moisture sensitivity ratings (MSL 1 versus MSL 3). The LM7121IMX/NOPB variant offers higher inventory availability (2000 pcs) and is supplied in Cut Tape and Digi-Reel packaging, supporting high-volume production requirements. The LM7121IM/NOPB is supplied in Tube packaging. Both are direct functional replacements with enhanced performance margins.

THS4031CD (Texas Instruments): This part carries Last Time Buy status and represents a transitional option. It maintains the 8-SOIC package and voltage feedback amplifier topology. However, the THS4031CD operates within a reduced temperature range (0°C to 70°C) compared to the EL2126CSZ-T13 (-40°C to 85°C), making it unsuitable for applications requiring full industrial temperature coverage. The minimum supply voltage requirement of 9V exceeds the EL2126CSZ-T13 minimum of 5V, restricting its use in lower voltage systems. Slew rate (100V/µs) and bandwidth (100 MHz) are lower than the original specification. Given its Last Time Buy status and operational constraints, this part is not recommended as a primary substitute.

Recommended Primary Substitutes: LM7121IM/NOPB and LM7121IMX/NOPB are the preferred equivalents, with LM7121IMX/NOPB offering superior availability and production-friendly packaging.

Frequently Asked Questions (FAQ)

Q: Can the LM7121IM/NOPB directly replace the EL2126CSZ-T13 without circuit modifications?

A: Yes. Both parts share identical 8-SOIC package geometry, pinout configuration, and voltage feedback amplifier topology. The LM7121IM/NOPB operates within the supply voltage range required by the EL2126CSZ-T13 and maintains the same temperature rating (-40°C to 85°C). No circuit modifications are required for direct substitution.

Q: What is the difference between LM7121IM/NOPB and LM7121IMX/NOPB?

A: Both parts are electrically identical with matching performance specifications. The primary difference is packaging format: LM7121IM/NOPB is supplied in Tube packaging, while LM7121IMX/NOPB is supplied in Cut Tape and Digi-Reel format. The LM7121IMX/NOPB variant is preferred for high-volume production due to automated handling compatibility and higher available inventory (2000 pcs versus 1156 pcs).

Q: Why does the LM7121 series show higher slew rate and bandwidth than the EL2126CSZ-T13?

A: The LM7121 series represents a more recent design generation with enhanced performance characteristics. Higher slew rate (1300V/µs versus 150V/µs) and bandwidth (235 MHz versus 135 MHz) provide improved transient response and frequency response capabilities. These enhancements are compatible with the EL2126CSZ-T13 application envelope and do not introduce incompatibility.

Q: Is the THS4031CD a suitable substitute?

A: The THS4031CD is not recommended as a primary substitute. While it maintains the 8-SOIC package and voltage feedback topology, it operates within a restricted temperature range (0°C to 70°C) compared to the EL2126CSZ-T13 (-40°C to 85°C). Additionally, its minimum supply voltage requirement of 9V exceeds the EL2126CSZ-T13 minimum of 5V. The part carries Last Time Buy status, indicating limited future availability. Applications requiring full industrial temperature coverage or lower supply voltages must use the LM7121 series.

Q: What is the significance of the MSL (Moisture Sensitivity Level) difference?

A: The EL2126CSZ-T13 carries MSL 3 (168 hours), while substitute parts carry MSL 1 (Unlimited). MSL rating indicates moisture sensitivity during storage and handling. Lower MSL ratings (MSL 1) provide greater tolerance to humidity exposure and longer shelf life without requiring specialized dry-pack storage. Substitute parts with MSL 1 offer superior handling flexibility and reduced risk of moisture-related failures during manufacturing.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The EL2126CSZ-T13 and all listed substitute parts (LM7121IM/NOPB, LM7121IMX/NOPB, and THS4031CD) maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for both legacy and current production environments.

Q: What output current capacity differences exist between the EL2126CSZ-T13 and LM7121 variants?

A: The EL2126CSZ-T13 provides 220 mA output current per channel, while the LM7121IM/NOPB and LM7121IMX/NOPB provide 71 mA per channel. Applications requiring the full 220 mA output capacity must verify that the reduced output current of the LM7121 series is compatible with the load impedance and signal requirements of the target circuit.

Q: Can the EL2126CSZ-T13 be used in applications with supply voltages below 9V?

A: Yes. The EL2126CSZ-T13 operates from 5V minimum supply voltage. The THS4031CD cannot be used in such applications due to its 9V minimum requirement. The LM7121 series (LM7121IM/NOPB and LM7121IMX/NOPB) supports 4.5V minimum supply voltage, providing additional margin for low-voltage applications.