AD8324JRQ-REEL7

Overview

The AD8324JRQ-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 features an SPI-compatible interface for digital gain control over a 59 dB range in 1 dB steps. 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
• Maintains 75 Ω output impedance during transmit enable and disable states
• Integrated sleep mode reducing static current to 30 μA
• Supports DOCSIS 2.0 and EuroDOCSIS reverse path 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 specific ordering suffix corresponds to the required package type, as the AD8324 family includes both LFCSP and QSOP variants. Confirm that the component meets RoHS compliance standards for the intended manufacturing process. Ensure the source documentation matches the Rev C datasheet specifications for accurate electrical characterization.

Selection Notes

Select this component for upstream cable transmission systems requiring precise digital gain adjustment. The device is suitable for designs needing low distortion performance at high output levels. Consider the thermal resistance characteristics when designing the PCB layout, particularly regarding the exposed pad connection for heat dissipation in surface-mount implementations.

Part Context

The AD8324 is part of Analog Devices' specialized amplifier portfolio targeting cable modem infrastructure. It serves as an upstream power amplifier solution for hybrid fiber-coaxial networks. The device integrates attenuation cores and output stages optimized for driving 75 Ω loads through transformers.

Replacement Considerations

Publicly confirmed substitutes include other ADI line drivers within the same product family that offer compatible pinouts and functional specifications for direct replacement in existing designs without circuit modification.