The MAX3814 TMDS® EQ/driver IC compensates for
FR-4 and cable losses up to the DVI™/HDMI™ transmit connector
and provides a fully compliant DVI/HDMI TMDS
output. The device can also be used in DVI/HDMI cable
applications to extend reach and improve jitter margin of
cable channels at the receive-side connector.
The on-chip TMDS drivers operate at a standard current
level for implementing a typical DVI/HDMI nonback-terminated transmitter, as well as a 50% higher current mode for using a 200Ω back termination resistor (nonmatching) to achieve a 10dB return loss.
Typical DVI/HDMI output drivers contribute to reflection
problems between the connector and a typical high-impedance
(open) DVI/HDMI Tx output. The selectable
output current (LEVEL pin) gives the option of partial
back termination (e.g., differentially connected 200Ω) to
mitigate the reflection problem effectively while keeping
common-mode offset to a minimum.
The 4-channel implementation treats all channels identically.
To allow board layout flexibility for DVI and HDMI
connectors, which have different channel order, the
clock and data channels can be arbitrarily assigned.
The MAX3814 operates from a 3.3V power supply,
standard for DVI/HDMI applications, and is packaged
in a 5mm x 5mm x 0.1mm, 32-pin TQFP package.
|
Download
E-Mail