AD8194ACPZ Datasheet, PDF (1/16 Pages) Analog Devices – Buffered 2:1 TMDS Switch with Equalization

FEATURES
2 inputs, 1 output HDMI/DVI high speed signal switch
Pin-to-pin compatible with the AD8193
Enables HDMI 1.3-compliant receiver
4 TMDS channels per input/output
Supports 250 Mbps to 2.25 Gbps data rates
Supports 25 MHz to 225 MHz pixel clocks
Fully buffered unidirectional inputs/outputs
Equalized inputs for operation with long HDMI cables
(20 m at 2.25 Gbps)
Matched 50 Ω input and output on-chip terminations
Low added jitter
Single-supply operation (3.3 V)
Standards compliant: HDMI receiver, DVI
32-lead, 5 mm × 5 mm, RoHS-compliant LFCSP
APPLICATIONS
Advanced television (HDTV) sets
Multiple input displays
Projectors
A/V receivers
Set-top boxes
GENERAL DESCRIPTION
The AD8194 is a low cost quad 2:1 TMDS® switch for high
speed HDMI™/DVI video applications. The AD8194 features
equalized inputs, ideal for systems with long cable runs. Its
primary function is to switch the high speed signals from one
of two single-link (HDMI or DVI) sources to the single-link
output. The AD8194 is a fully buffered switch solution with 50 Ω
input and output terminations, providing full-swing output
signal recovery and minimizing reflections for improved system
signal integrity.
The AD8194 is provided in a space-saving, 32-lead, LFCSP,
surface-mount, RoHS-compliant, plastic package and is specified
to operate over the −40°C to +85°C temperature range.
Buffered 2:1 TMDS Switch
with Equalization
AD8194
FUNCTIONAL BLOCK DIAGRAM
AVCC AVEE
S_SEL
VTTI
CONTROL
LOGIC
AD8194
IP_A[3:0] ⁺
IN_A[3:0] _–
+
IP_B[3:0]
IN_B[3:0] _–
VTTI
4
4
4
EQ
SWITCH
CORE
Tx
4
4
4
HIGH SPEED
BUFFERED
VTTO
+
OP[3:0]
– ^ON[3:0]
Figure 1.
TYPICAL APPLICATION
HDTV SET
HDMI
RECEIVER
SET-TOP BOX
AD8194
DVD PLAYER
Figure 2. Typical AD8194 Application for HDTV Sets
PRODUCT HIGHLIGHTS
1. Data supports rates up to 2.25 Gbps, enabling greater than
1080p deep color (12-bit color) HDMI formats and greater
than UXGA (1600 × 2300) DVI resolutions.
2. Fully buffered inputs and outputs.
3. Input cable equalizer enables use of long cables at the
input. For a typical 24 AWG cable, the AD8194 compen-
sates for more than 20 m at data rates up to 2.25 Gbps.
4. Matched 50 Ω on-chip input and output terminations
improve system signal integrity.
5. Single-pin source select bit.
6. Low added jitter.
Rev. 0
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