EL2126CSZ-T13

Overview

The EL2126CSZ-T13 is an ultra-low noise, wideband voltage feedback amplifier manufactured by Renesas Electronics Corporation. It operates from ±2.5V to ±15V supplies with a typical supply current of 4.7mA at ±5V and 56mA at ±15V. The device features a 100MHz -3dB bandwidth at a gain of 10 (±5V) and 135MHz at ±15V. Key electrical specifications include a voltage noise spectral density of 1.3nV/√Hz, a current noise of 1.2pA/√Hz, and a typical input offset voltage of 200µV. It is housed in an 8-lead SOIC package.

Feature Summary

• Ultra-low noise performance with 1.3nV/√Hz voltage noise and 1.2pA/√Hz current noise for high-fidelity signal amplification.
• Wideband operation with a 100MHz -3dB bandwidth at unity gain configurations and gains greater than or equal to 10.
• Low power consumption utilizing half the supply current of competitive parts, enabling efficient thermal management.
• Stable for traditional voltage feedback topologies, allowing the use of reactive elements in the feedback loop.

Applications

• Ultrasound input amplifiers
• Wideband instrumentation systems
• Communication equipment signal processing
• AGC and PLL active filters
• Wideband sensor interfaces

Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status as the 'Z' suffix indicates lead-free construction. Ensure proper ESD handling procedures are followed during storage and assembly. Check datasheet revisions for any updates to absolute maximum ratings or thermal characteristics before finalizing procurement orders.

Selection Notes

Select this component for applications requiring minimal noise addition when amplifying small signals. Verify that the required closed-loop gain is 10 or higher for guaranteed stability without external compensation. Consider the 8-lead SOIC package dimensions for PCB layout constraints. Evaluate thermal dissipation requirements based on the specific supply voltage and load conditions.

Part Context

The EL2126 series belongs to the Elantec family of high-speed operational amplifiers fabricated using a proprietary complementary bipolar process. This technology enables high slew rates and wide bandwidths while maintaining low power consumption. The EL2126CSZ-T13 specifically denotes the tape and reel packaging variant of the 8-lead SOIC version.

Replacement Considerations

Public confirmed substitute part numbers: LM7121IM/NOPB, LM7121IMX/NOPB.

FAQ

What is the minimum stable gain for the EL2126?

The EL2126 is designed to be stable for gains of 10 and greater. External compensation may be required for lower gain settings.

How does capacitive loading affect the EL2126?

Capacitive loads decrease phase margin, potentially causing peaking, overshoot, or oscillation. Isolation with a series resistor between 5Ω to 20Ω is recommended for optimum AC performance.