EL2125CSZ-T13 Equivalent & Substitute Parts

Part Overview

The EL2125CSZ-T13 is a voltage feedback amplifier manufactured by Renesas Electronics Corporation, configured as a single-circuit integrated circuit in 8-SOIC surface mount packaging. This device is classified as obsolete, indicating it is no longer in active production. The identification of equivalent and substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity for applications currently utilizing this component.

Substiute Parts

EL2125CSZ-T13

Renesas Electronics CorporationIn Stock: 1135EL2125CSZ-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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THS4031CDR

Texas InstrumentsIn Stock: 1669THS4031CDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the EL2125CSZ-T13 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 1
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Electrical Performance Criteria:

• Slew Rate: 185 V/µs (minimum acceptable performance)
• -3dB Bandwidth: 220 MHz (minimum acceptable performance)
• Voltage - Supply Span: 5 V to 30 V (operating range compatibility)
• Operating Temperature: -45°C ~ 85°C (thermal envelope)

Compliance & Quality Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 3 (168 Hours)

Substitute parts must maintain identical package geometry and mounting characteristics to ensure direct board-level compatibility. Electrical parameters of substitute parts may exceed the minimum specifications of the EL2125CSZ-T13 without compromising application performance, provided they operate within the specified supply voltage and temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

The LM7121IM/NOPB and LM7121IMX/NOPB are Texas Instruments voltage feedback amplifiers in active production status. Both devices maintain identical electrical specifications and are available in 8-SOIC surface mount packaging. The LM7121IMX/NOPB is supplied in Cut Tape and Digi-Reel packaging, while the LM7121IM/NOPB is supplied in Tube packaging. Both parts exceed the performance specifications of the EL2125CSZ-T13 across slew rate and bandwidth parameters while maintaining ROHS3 compliance. The LM7121 series offers improved input bias current (5.2 µA versus 22 µA) and reduced supply current (5.3 mA versus 10.8 mA). Operating temperature range is -40°C to 85°C, which covers the upper portion of the EL2125CSZ-T13 range. Moisture sensitivity level is 1 (Unlimited), providing superior handling characteristics compared to the original part's MSL 3 rating.

Secondary Substitutes (Last Time Buy / Obsolete Status):

The THS4031CD and THS4031CDR are Texas Instruments voltage feedback amplifiers. The THS4031CD is in Last Time Buy status, while the THS4031CDR is obsolete. Both devices are available in 8-SOIC surface mount packaging and maintain ROHS3 compliance. These parts operate within a reduced temperature range (0°C to 70°C) and require a minimum supply voltage of 9 V, which may limit applicability in systems requiring the full -45°C to 85°C operating range or 5 V minimum supply voltage of the original EL2125CSZ-T13. The THS4031 series exhibits lower slew rate (100 V/µs) and reduced bandwidth (100 MHz) compared to the EL2125CSZ-T13, making these substitutes suitable only for applications with reduced performance requirements.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the original EL2125CSZ-T13. The LM7121 series offers superior moisture sensitivity characteristics (MSL 1 versus MSL 3), reducing handling and storage constraints during procurement and assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the LM7121IM/NOPB directly replace the EL2125CSZ-T13 on existing circuit boards?

A: Yes. Both devices are configured as single-circuit voltage feedback amplifiers in 8-SOIC surface mount packaging with identical pin assignments and package geometry (0.154" width, 3.90mm). Direct board-level substitution is supported without layout modifications.

Q: What are the key electrical differences between the EL2125CSZ-T13 and LM7121IMX/NOPB?

A: The LM7121IMX/NOPB provides superior performance specifications: slew rate of 1300 V/µs (versus 185 V/µs), -3dB bandwidth of 235 MHz (versus 220 MHz), and reduced input bias current of 5.2 µA (versus 22 µA). Supply current is also reduced to 5.3 mA from 10.8 mA. These improvements do not compromise compatibility and may enhance system performance in bandwidth-sensitive applications.

Q: Why is the operating temperature range different for the THS4031 series?

A: The THS4031CD and THS4031CDR operate over a narrower temperature range (0°C to 70°C) compared to the EL2125CSZ-T13 (-45°C to 85°C). Applications requiring operation below 0°C or above 70°C must utilize the LM7121 series or verify that the reduced temperature range is acceptable for the specific system environment.

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

A: The EL2125CSZ-T13 has MSL 3 (168 Hours), requiring controlled moisture exposure during storage and handling. All substitute parts have MSL 1 (Unlimited), eliminating moisture sensitivity constraints. This reduces procurement complexity and storage requirements.

Q: Are there supply voltage compatibility issues with any substitute parts?

A: The THS4031CD and THS4031CDR require a minimum supply voltage of 9 V, compared to 5 V for the EL2125CSZ-T13. Applications operating at 5 V to 8.9 V supply voltage must use the LM7121 series (minimum 4.5 V) or the original EL2125CSZ-T13. The LM7121 series supports supply voltages up to 33 V, exceeding the original part's 30 V maximum.

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

A: Both parts are electrically identical. The LM7121IM/NOPB is supplied in Tube packaging, while the LM7121IMX/NOPB is supplied in Cut Tape and Digi-Reel packaging. Selection depends on procurement volume and assembly line requirements. The LM7121IMX/NOPB offers higher inventory availability (2000 Pcs versus 1156 Pcs).

Q: Can the THS4031 series be used in applications requiring the full -45°C to 85°C temperature range?

A: No. The THS4031CD and THS4031CDR operate only from 0°C to 70°C. Applications requiring operation below 0°C or above 70°C must use the LM7121 series (-40°C to 85°C) or the original EL2125CSZ-T13 (-45°C to 85°C).

Q: What is the output current capability difference between substitute parts?

A: The EL2125CSZ-T13 provides 250 mA output current per channel. The LM7121 series provides 71 mA, and the THS4031 series provides 90 mA. Applications requiring output currents exceeding 90 mA must retain the original EL2125CSZ-T13 or verify that reduced output current is acceptable for the specific application.