ADEL2020AR-20-REEL

Overview

The ADEL2020AR-20-REEL is a current feedback amplifier in a 20-lead SOIC package, serving as an improved second source to the EL2020. It operates within a supply voltage range of ±3.0 V to ±18 V and supports an industrial temperature range of –40 °C to +85 °C. Key dynamic specifications include a 90 MHz bandwidth at unity gain and a 500 V/µs slew rate. The device draws 6.8 mA quiescent current, reducing to 2.1 mA in power-down mode. It features low input voltage noise of 2.9 nV/√Hz and offers a high-performance disable function with 100 ns turn-off time.

Feature Summary

• Optimized for video applications with minimal differential gain and phase errors when driving terminated cables.
• Includes a high-performance disable function that isolates input from output and reduces supply current significantly.
• Provides break-before-make switching capability during state transitions to prevent signal glitches.
• Capable of driving capacitive loads exceeding 1000 pF directly without oscillation when used with appropriate feedback resistors.

Applications

• Video line drivers requiring wide bandwidth and low distortion
• High-speed data acquisition systems
• Multiplexer circuits utilizing the disable feature for channel isolation

Procurement Notes

Verify the specific ordering suffix matches the required packaging format. Confirm the component meets the industrial temperature range requirements for your environment. Ensure ESD precautions are observed during handling due to the sensitivity of the internal circuitry. Cross-reference the pinout with your schematic to confirm compatibility with the 20-lead SOIC footprint.

Selection Notes

Select this part when a current feedback architecture is preferred for its constant bandwidth characteristics independent of closed-loop gain. Consider the ADEL2020 over standard voltage feedback amplifiers if higher slew rates and wider bandwidths are necessary for video or fast settling applications. Evaluate the disable pin functionality if system-level power management or signal isolation is required.

Part Context

This component is an enhanced version of the EL2020, offering improved dynamic performance including 50% more bandwidth and lower power consumption. It maintains compatibility with existing designs while providing better offset voltage and noise specifications. The device is designed to replace legacy parts in video and data acquisition equipment where high speed and low distortion are critical.

Replacement Considerations

The ADEL2020 is explicitly documented as an improved second source to the EL2020. Designers replacing the EL2020 should verify that the slightly different offset nulling requirements and feedback resistor values align with their existing circuit topology.

FAQ

How does the disable pin affect the output impedance?

When disabled by pulling Pin 8 to common (0 V), the output becomes a high impedance state, approximately equivalent to the parallel combination of the feedback and gain resistors with a small capacitance.

What is the recommended method for offset nulling?

A 10 kΩ potentiometer connected between Pins 1 and 5, with the wiper tied to V+, can trim the inverting input current. For higher gains, the wiper may need to be tied to ground through a large resistor to achieve zero output offset.

Can the ADEL2020 drive capacitive loads directly?

Yes, with the appropriate feedback resistor, the ADEL2020 can drive capacitive loads exceeding 1000 pF directly without oscillation.