ADA4320-1ACPZ-R7

Overview

The ADA4320-1 is a high-power, ultralow distortion video amplifier designed for CATV reverse channel line driving. It supports DOCSIS 3.0 and EuroDOCSIS 3.0 specifications with a single 5 V supply (4.75 V to 5.25 V). The device features a gain range of -27 dB to +32 dB (59 dB total) in 1 dB steps via SPI. Key electrical parameters include an output impedance of 75 Ω, input resistance of 640 Ω (differential), and ACPR performance of -66 dBc for single QPSK channels. Operating current ranges from 12 μA in sleep mode to 260 mA at maximum gain.

Feature Summary

• Supports CableLabs DOCSIS 3.0/2.0 and EuroDOCSIS 3.0 upstream transmission specifications
• Maintains constant 75 Ω output impedance across enable, disable, and sleep states
• Features current-scaled output stage that adjusts quiescent consumption based on gain setting
• Includes selectable low power modes including transmit disable and full power-down sleep

Applications

• DOCSIS 3.0 and EuroDOCSIS cable modems and E-MTAs
• DOCSIS 3.0 set-top boxes
• CATV telephony modems
• Coaxial or twisted pair line drivers

Procurement Notes

Verify the specific ordering suffix R7 corresponds to the reel packaging configuration required for your assembly process. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the LFCSP-24 package thermal pad is properly soldered to the PCB ground plane to achieve specified thermal resistance and junction temperature limits during operation.

Selection Notes

Select this component when designing systems requiring precise gain control and low distortion for upstream CATV signals. The integrated SPI interface allows dynamic adjustment of gain and output current levels to optimize power efficiency. Consider the 4 mm x 5 mm LFCSP package constraints and the necessity of external balun transformers for single-ended to differential conversion in your layout design.

Part Context

This device belongs to the Analog Devices ADA4320-1 series of video amplifiers. It is specifically engineered for cable modem termination systems and customer premises equipment. The component addresses the high output drive and stringent fidelity requirements of modern DOCSIS 3.0 upstream channels within a compact surface-mount footprint.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.