AD8324JRQZ-REEL7

Overview

The AD8324JRQZ-REEL7 is a low-cost, single-channel line driver designed for coaxial cable applications. It operates from a single 3.13 V to 3.47 V supply with a typical quiescent current of 207 mA at maximum gain. The device provides a voltage gain range of 59 dB, adjustable in 1 dB steps via an SPI interface. It maintains a differential output impedance of 75 Ω and supports an upper bandwidth of 100 MHz across the full gain range.

Feature Summary

• Digital gain control via SPI interface with 1 dB step resolution over a 59 dB range
• Maintains 75 Ω differential output impedance during both transmit enable and disable states
• Integrated power-saving modes including sleep mode reducing current to 30 μA
• Supports DOCSIS 2.0 and EuroDOCSIS reverse path transmission specifications

Applications

• DOCSIS 2.0 and EuroDOCSIS cable modems
• CATV set-top boxes
• CATV telephony modems
• Coaxial and twisted pair line drivers

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm that the component meets RoHS compliance standards applicable to the target manufacturing region. Ensure the QSOP-20 package variant aligns with the thermal and footprint constraints of the printed circuit board design.

Selection Notes

Select this component for upstream cable line driving applications requiring precise digital gain adjustment. The device is suitable for systems needing a 3.3 V single-supply operation with low distortion performance. Consider the thermal resistance characteristics of the QSOP package when designing heat dissipation strategies for enclosed environments.

Part Context

This part belongs to the Analog Devices AD8324 series, which comprises specialized amplifiers optimized for cable line driving. The AD8324 family addresses the requirements of DOCSIS 2.0 and EuroDOCSIS standards, providing a cost-effective solution for integrating upstream signal amplification into cable modem and CATV infrastructure equipment.

Replacement Considerations

Publicly confirmed substitutes include other parts within the AD8324 product family, such as variants with different package options like LFCSP. When replacing, ensure the alternative maintains compatibility with the 3.3 V supply voltage and SPI control interface while meeting the required 75 Ω output impedance specification.