EL2126CS

Overview

The EL2126CS is an ultra-low noise, wideband operational amplifier manufactured by Renesas Electronics Corporation in an 8-lead SOIC package. 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 voltage noise spectral density of 1.3nV/√Hz and a current noise of 1.2pA/√Hz. At a gain of 10, the -3dB bandwidth reaches 100MHz at ±5V and 135MHz at ±15V. The input offset voltage is specified at a maximum of 2mV at ±5V and 3mV at ±15V. Slew rates range from 80V/µs to 150V/µs depending on supply voltage.

Feature Summary

• Ultra-low noise performance suitable for amplifying very small signals without adding significant noise
• Low power dissipation enabling operation in space-constrained systems with multiple channels
• Stable for gains of 10 and greater using traditional voltage feedback architecture
• Capable of driving low impedance loads such as 100Ω resistive loads

Applications

• Ultrasound input amplifiers
• Wideband instrumentation
• Communication equipment
• AGC and PLL active filters
• Wideband sensors

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as standard versions may differ from Pb-free variants. Check datasheet revision dates against manufacturing lot codes to ensure specification alignment. Validate package markings match the specific ordering suffix requirements for your assembly process.

Selection Notes

Select this component when system design requires minimal signal degradation in high-frequency applications. Ensure feedback resistor values are chosen carefully to maintain phase margin and prevent peaking. Verify that the operating temperature range aligns with the specified -40°C to +85°C limits. Consider thermal dissipation capabilities relative to the PCB layout and ambient conditions during continuous operation.

Part Context

This part belongs to the EL2126 family of wideband amplifiers fabricated using a proprietary complementary bipolar process. The family includes variations in packaging such as the 5-lead SOT-23 and the 8-lead SOIC. The EL2126CS specifically denotes the surface-mount SOIC variant designed for automated assembly processes while maintaining the core electrical characteristics of the series.

Replacement Considerations

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