ADEL2020ANZ

Overview

The ADEL2020ANZ is a high-speed current feedback operational amplifier designed for video and data acquisition applications. It operates within a supply voltage range of ±3.0 V to ±18 V. Key electrical parameters include a –3 dB bandwidth of 90 MHz at unity gain, a slew rate of 500 V/µs, and a settling time of 60 ns to 0.1% for a 10 V step. The device features low input voltage noise of 2.9 nV/√Hz and quiescent current of 6.8 mA. It incorporates a disable function that reduces supply current to 2.1 mA and provides input-to-output isolation of 54 dB in the off state.

Feature Summary

• Optimized for high-performance video and data acquisition systems with superior dynamic specifications compared to legacy counterparts.
• Integrated high-performance disable function allowing rapid transition to high-impedance output state with guaranteed break-before-make timing.
• Capable of driving capacitive loads exceeding 1000 pF directly without oscillation when used with appropriate feedback resistance.

Applications

• Video line drivers requiring low differential gain and phase errors
• High-speed data acquisition signal conditioning
• Broadband amplification circuits

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the ADEL2020ANZ denotes an 8-lead PDIP variant. Confirm temperature range compliance for industrial environments (-40°C to +85°C). Ensure power supply bypassing components are selected according to datasheet recommendations to maintain stability and minimize distortion at high frequencies.

Selection Notes

Select this component for applications demanding high slew rates and wide bandwidth with low power consumption. Consider the current feedback architecture, which requires specific feedback resistor values to set bandwidth. Evaluate thermal dissipation requirements against the derating curves if operating near maximum junction temperatures or using higher supply voltages.

Part Context

The ADEL2020 serves as an improved second source to the EL2020, offering enhanced performance metrics including lower power supply current and reduced noise. It is manufactured by Analog Devices Inc. and is available in both 8-lead PDIP and 20-lead SOIC packages to accommodate various board layout constraints.

Replacement Considerations

The ADEL2020AR-20 is a pin-compatible alternative offered in a 20-lead SOIC package.

FAQ

How does the disable function affect input-to-output isolation?

When the disable pin is pulled to common (0 V), the device enters a disabled state providing input-to-output isolation better than 50 dB at 10 MHz, with an output impedance similar to a 1.5 kΩ resistor in parallel with 13 pF.

What is the recommended method for offset nulling?

A 10 kΩ potentiometer connected between Pins 1 and 5, with its wiper connected to V+, can be used to trim out the inverting input current. For higher closed-loop gains, the wiper should be tied to ground through a large value resistor.