AD8331ARQ-REEL7

Overview

The AD8331ARQ-REEL7 is a single-channel ultralow noise variable gain amplifier (VGA) from Analog Devices, designed for high-frequency signal processing. It integrates an LNA with 19 dB gain and an X-AMP VGA providing a 48 dB range. The device operates on a single 5 V supply, consuming 25 mA per channel. Key electrical parameters include a 120 MHz bandwidth, 650 V/µs slew rate, and 0.74 nV/√Hz input voltage noise. It features programmable output clamping and active input impedance matching.

Feature Summary

• Integrates an ultralow noise preamplifier with an X-AMP variable gain amplifier for precise linear-in-dB control.
• Features selectable postamplifier gain to optimize performance for specific analog-to-digital converter resolutions.
• Includes adjustable output limiting to prevent overload of subsequent stages.

Applications

• Ultrasound and sonar time-gain controls
• High performance automatic gain control systems
• I/Q signal processing
• High speed dual ADC drivers

Procurement Notes

Verify the exact part number against official manufacturer documentation to ensure compatibility with system requirements. Confirm that the REEL7 suffix corresponds to the correct tape and reel packaging configuration required for automated assembly processes. Cross-reference specifications with the latest datasheet revision to validate performance characteristics.

Selection Notes

Select this component when designing circuits requiring low noise amplification at frequencies up to 120 MHz. It is suitable for applications demanding precise gain control and high linearity. Ensure the design accommodates the single 5 V supply requirement and utilizes the differential outputs for optimal distortion performance.

Part Context

This component belongs to the AD8331/AD8332/AD8334 family of ultralow noise VGAs. While the AD8332 offers dual channels and the AD8334 provides four channels, the AD8331 is specifically configured as a single-channel solution. All variants share similar internal architectures and performance metrics optimized for ultrasound and RF applications.

Replacement Considerations

The AD8332ACPZ and AD8334ACP are functionally related parts within the same product family. Verify pinout compatibility and channel count differences before substitution. Consult the official ordering guide for package variations and availability status.