AD8194ACPZ-R7

Overview

The AD8194ACPZ-R7 is a buffered 2:1 TMDS switch designed for high-speed HDMI and DVI video applications. It features four TMDS channels per input/output, supporting data rates from 250 Mbps to 2.25 Gbps and pixel clocks from 25 MHz to 225 MHz. The device includes equalized inputs capable of compensating for cable loss over distances up to 20 meters at maximum data rates. It operates on a single 3.3 V supply with typical quiescent currents of 50 mA (AVCC), 40 mA (VTTI), and 40 mA (VTTO). The component is housed in a 32-lead LFCSP package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated input equalization recovers signal integrity for long HDMI cable runs.
• Fully buffered architecture with matched 50 Ω on-chip terminations minimizes reflections.
• Single-pin source selection logic controls switching between two input sources.
• Low added jitter performance supports deep color and high-resolution formats.

Applications

• Advanced television (HDTV) sets
• Multiple input displays
• Projectors
• A/V receivers
• Set-top boxes

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing components. Confirm that the LFCSP package requires proper thermal connection to the AVEE plane for heat dissipation. Ensure the design accounts for the necessity of external low-speed switches for DDC signals, as this component handles only TMDS data.

Selection Notes

Select this part for designs requiring signal recovery over extended cable lengths without external equalizers. Verify compatibility with HDMI 1.3 specifications regarding receiver termination. Consider the need for separate CMOS switches to manage low-speed control lines like DDC and CEC, which are not integrated into this switch.

Part Context

The AD8194 is part of Analog Devices' portfolio of high-speed video switches. It serves as a buffered solution for TMDS signals, distinct from non-buffered or crosspoint alternatives. It is pin-to-pin compatible with the AD8193, facilitating direct upgrades or replacements in existing layouts while providing enhanced equalization capabilities.

Replacement Considerations

The AD8193 is a pin-compatible alternative within the same family. Verify if the integrated equalization of the AD8194 is required or if the non-equalized AD8193 suffices for shorter cable runs.