ADA4817-1ARDZ-RL

Overview

The ADA4817-1ARDZ-RL is a single-channel, unity-gain stable, ultrahigh-speed voltage feedback operational amplifier with FET inputs. Utilizing Analog Devices' proprietary XFCB process, it delivers a −3 dB bandwidth of 1050 MHz and a slew rate of 870 V/µs at ±5 V supplies. The device features low input noise (4 nV/√Hz) and picoampere-level bias current. It operates on a wide supply range of 5 V to 10 V and includes a dedicated power-down pin to reduce quiescent current from 19 mA to below 2 mA.

Feature Summary

• Integrates an innovative high-speed FET input stage combined with an H-bridge architecture to achieve exceptional speed and low distortion.
• Features a low-distortion pinout design that improves second harmonic distortion performance and simplifies printed circuit board layout.
• Includes a dedicated power-down control pin allowing the user to significantly reduce supply current consumption when the amplifier is inactive.
• Utilizes an exposed paddle in the package to provide a low thermal resistance path to the PCB for efficient heat transfer.

Applications

• Photodiode amplifiers
• Data acquisition front ends
• Instrumentation
• Filters
• ADC drivers

Procurement Notes

Verify the specific ordering suffix ARDZ-RL against the manufacturer's official documentation to confirm the exact package type and reel quantity. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the datasheet revision date to confirm the technical specifications align with your design requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring ultrahigh bandwidth and low noise, such as photodiode preamplifiers or ADC drivers. Consider the 5 V to 10 V supply range and the availability of a power-down feature for systems requiring active management of quiescent current. Evaluate the thermal dissipation capabilities based on the specific PCB layout and ambient temperature conditions.

Part Context

The ADA4817-1 is part of the ADA4817 family of FastFET amplifiers developed using the eXtra fast complementary bipolar (XFCB) process. This technology enables the combination of ultralow noise and very high input impedances. The family includes both single-channel and dual-channel variants designed for wideband transimpedance applications and data acquisition systems.

Replacement Considerations

Consult the manufacturer's official documentation for confirmed substitute part numbers. Verify compatibility regarding pin configurations, electrical parameters, and package dimensions before implementing any alternative components in the design.

FAQ

How does the power-down function operate?

The amplifier features a separate power-down pin (PD). The device is enabled when the PD pin voltage is within 0.9 V of the positive supply (+VS) and disabled when the voltage is at least 3.5 V from +VS, reducing quiescent current to below 2 mA.

What is the purpose of the exposed pad in the package?

The exposed pad provides a low thermal resistance path to the printed circuit board (PCB), enabling more efficient heat transfer and increasing reliability by dissipating power generated during operation.