AD8123ACPZ-RL

Overview

The AD8123ACPZ-RL is a triple differential receiver with adjustable line equalization designed to compensate for transmission losses in UTP and coaxial cables up to 300 meters. It features a 120 MHz -3 dB large signal bandwidth, 55 dB peak gain at 100 MHz, and operates on ±4.5 V to ±5.5 V supplies with 132 mA quiescent current. The device includes two comparators for sync extraction and control pins for frequency response adjustment.

Feature Summary

• Triple differential architecture compensates for cable losses up to 300 meters
• Adjustable high-frequency peaking and broadband flat gain via external control voltages
• Integrated pole location adjustment for varying cable types and gauges
• On-chip comparators with hysteresis for common-mode sync pulse extraction

Applications

• Keyboard-video-mouse (KVM) systems
• RGB video distribution over UTP cables
• Professional video projection and distribution
• HD video applications
• Security video surveillance

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure compatibility with the required thermal management solutions for the LFCSP-40 package. Confirm that the supply voltage range matches the system design requirements before integration.

Selection Notes

Select this component for applications requiring long-distance RGB or YPbPr signal transmission over twisted pair or coaxial cables. The adjustable control pins allow optimization for specific cable lengths and types. Consider the power-down feature for systems requiring low standby current consumption.

Part Context

The AD8123 belongs to Analog Devices' family of high-speed video amplifiers and receivers. It complements drivers like the AD8134 and AD8147 by providing the necessary equalization and sync extraction capabilities for complete video transmission links. The device is part of the broader portfolio of professional video processing solutions.

Replacement Considerations

Publicly confirmed substitutes include the AD8124, which offers similar triple differential reception with adjustable cable equalization. Designers should verify pinout compatibility and electrical specifications when transitioning between these parts to ensure system performance remains within required limits.

FAQ

How does the AD8123 handle sync pulse extraction?

The device includes two on-chip comparators with built-in hysteresis. These can extract horizontal and vertical sync pulses encoded in the common-mode voltages of the RGB signals, supporting source-only cable termination schemes.

What is the purpose of the VPOLE control pin?

The VPOLE pin adjusts the pole locations of the equalizer. This allows the device to compensate for different cable gauges, types (UTP vs. coaxial), and variations between cables, providing flexibility beyond simple length-based compensation.

Can the AD8123 be used with coaxial cable?

Yes, the AD8123 can compensate for coaxial cable losses. Recommended control voltage settings for coaxial cable differ from those for UTP, as illustrated in the datasheet's typical performance characteristics.