EL2126CS Equivalent & Substitute Parts

Part Overview

The EL2126CS is a voltage feedback amplifier integrated circuit manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production requirements. The EL2126CS delivers a single amplifier circuit with a slew rate of 150V/µs and -3dB bandwidth of 135 MHz, suitable for general-purpose voltage feedback amplification applications.

Substiute Parts

EL2126CS

Renesas Electronics CorporationIn Stock: 1053EL2126CS 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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Key Parameters

Substitute Part Grouping Explanation

Substitution of the EL2126CS is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Amplifier Type: Voltage Feedback (single circuit configuration)
• Package / Case: 8-SOIC surface mount form factor
• Operating Temperature Range: -40°C ~ 85°C minimum
• Supply Voltage Compatibility: Minimum 5V to maximum 30V operation

Secondary Compatibility Factors:

• Slew Rate: Substitute must meet or exceed 150V/µs
• -3dB Bandwidth: Substitute must meet or exceed 135 MHz
• Input Bias Current: Substitute must not exceed 7 µA significantly
• Input Offset Voltage: Substitute must not exceed 500 µV significantly
• Output Current Capability: Substitute must support 220 mA per channel minimum

The LM7121IM/NOPB and LM7121IMX/NOPB from Texas Instruments satisfy all primary substitution criteria and exceed secondary performance parameters. Both devices are active products with current manufacturing status and RoHS3 compliance, addressing the obsolescence of the EL2126CS.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LM7121IMX/NOPB

The LM7121IMX/NOPB is the preferred substitute for the obsolete EL2126CS. This device is manufactured by Texas Instruments and maintains active product status with current availability. The LM7121IMX/NOPB is RoHS3 compliant, addressing regulatory requirements that the original EL2126CS does not satisfy. The packaging format (Cut Tape & Digi-Reel) supports both prototype and production volume requirements. Electrical performance exceeds the EL2126CS across all measured parameters: slew rate of 1300V/µs versus 150V/µs, -3dB bandwidth of 235 MHz versus 135 MHz, and lower input bias current of 5.2 µA versus 7 µA. Supply voltage range compatibility extends from 4.5V to 33V, encompassing the original 5V to 30V specification.

Secondary Substitute: LM7121IM/NOPB

The LM7121IM/NOPB provides equivalent electrical performance to the LM7121IMX/NOPB with identical specifications. This variant is supplied in Tube packaging format. Selection between LM7121IM/NOPB and LM7121IMX/NOPB depends on procurement and assembly requirements rather than electrical compatibility.

Both LM7121 variants are direct pin-compatible replacements in the 8-SOIC package and require no circuit modifications for implementation. The enhanced performance characteristics of the LM7121 series provide design margin improvements over the original EL2126CS specification.

Frequently Asked Questions (FAQ)

Q: Can the LM7121IM/NOPB and LM7121IMX/NOPB be used interchangeably with the EL2126CS?

A: Yes. Both devices are electrically and mechanically compatible with the EL2126CS. They share identical 8-SOIC package dimensions, pin configuration, and operating temperature range. The primary difference between the two LM7121 variants is packaging format: LM7121IM/NOPB is supplied in Tube, while LM7121IMX/NOPB is supplied in Cut Tape & Digi-Reel format.

Q: What are the key performance improvements of the LM7121 series over the EL2126CS?

A: The LM7121 devices provide significantly enhanced performance: slew rate increases from 150V/µs to 1300V/µs, -3dB bandwidth increases from 135 MHz to 235 MHz, and input bias current decreases from 7 µA to 5.2 µA. Supply voltage range extends from 4.5V minimum (versus 5V) to 33V maximum (versus 30V).

Q: Are there compliance or regulatory differences between the EL2126CS and LM7121 substitutes?

A: Yes. The EL2126CS is RoHS non-compliant, while both LM7121 variants are RoHS3 compliant. Both the original and substitute devices are REACH Unaffected and carry ECCN classification EAR99. The LM7121 variants support modern regulatory requirements for new designs and production.

Q: What packaging options are available for the LM7121 substitute?

A: Two packaging variants are available. The LM7121IMX/NOPB is supplied in Cut Tape & Digi-Reel format, suitable for automated assembly and mixed-volume production. The LM7121IM/NOPB is supplied in Tube format, suitable for manual assembly or lower-volume applications. Both use identical 8-SOIC (0.154", 3.90mm Width) surface mount packages.

Q: Is circuit redesign required when substituting the LM7121 for the EL2126CS?

A: No circuit redesign is required. The LM7121 devices are pin-compatible direct replacements in the 8-SOIC package. The enhanced performance characteristics of the LM7121 series provide improved design margin without requiring modifications to existing circuit topology or component values.

Q: What is the current availability status of these substitute parts?

A: The LM7121IM/NOPB has 1156 pieces in stock, and the LM7121IMX/NOPB has 2000 pieces in stock. Both are active products from Texas Instruments with ongoing manufacturing support, contrasting with the obsolete status of the EL2126CS.