Document
4:1 HDMI/DVI Switch with Equalization AD8197A
FEATURES
4 inputs, 1 output HDMI/DVI link Enables HDMI 1.3-compliant receiver Pin-to-pin compatible with the AD8191A 4 TMDS channels per link Supports 250 Mbps to 2.25 Gbps data rates Supports 25 MHz to 225 MHz pixel clocks Equalized inputs for operation with long HDMI cables www.DataSheet4U.com (20 meters at 2.25 Gbps) Fully buffered unidirectional inputs/outputs Globally switchable, 50 Ω on-chip terminations Pre-emphasized outputs Low added jitter Single-supply operation (3.3 V) 4 auxiliary channels per link Bidirectional unbuffered inputs/outputs Flexible supply operation (3.3 V to 5 V) HDCP standard compatible Allows switching of DDC bus and 2 additional signals Output disable feature Reduced power dissipation Removable output termination Allows building of larger arrays 2 AD8197A devices support HDMI/DVI dual-link Standards compatible: HDMI receiver, HDCP, DVI Serial (I2C slave) and parallel control interface 100-lead, 14 mm × 14 mm LQFP, Pb-free package
FUNCTIONAL BLOCK DIAGRAM
PP_CH[1:0] PP_OTO PP_OCL PP_EQ PP_EN PP_PRE[1:0]
RESET
PARALLEL SERIAL I2C_SDA I2C_SCL I2C_ADDR[2:0] VTTI
2
2
AD8197A
CONTROL LOGIC AVCC DVCC AMUXVCC AVEE DVEE VTTO
3
CONFIG INTERFACE
+ IP_A[3:0] IN_A[3:0] – + IP_B[3:0]
4 4 4 4 4 4 4 4 4 4
IN_B[3:0] – + IP_C[3:0] IN_C[3:0] – + IP_D[3:0] IN_D[3:0] –
SWITCH CORE EQ
PE
+ OP[3:0] – ON[3:0]
HIGH SPEED VTTI AUX_A[3:0] AUX_B[3:0] AUX_C[3:0] AUX_D[3:0]
BUFFERED
4 4 4 4
SWITCH CORE LOW SPEED UNBUFFERED
4
AUX_COM[3:0]
BIDIRECTIONAL
Figure 1.
TYPICAL APPLICATION
MEDIA CENTER HDTV SET HDMI RECEIVER SET-TOP BOX DVD PLAYER
04:20
GAME CONSOLE
APPLICATIONS
Multiple input displays Projectors A/V receivers Set-top boxes Advanced television (HDTV) sets
Figure 2. Typical HDTV Application
GENERAL DESCRIPTION
The AD8197A is an HDMI™/DVI switch featuring equalized TMDS® inputs and pre-emphasized TMDS outputs, ideal for systems with long cable runs. Outputs can be set to a high impedance state to reduce the power dissipation and/or to allow the construction of larger arrays using the wire-OR technique. The AD8197A is provided in a 100-lead LQFP, Pb-free, surfacemount package, specified to operate over the −40°C to +85°C temperature range.
PRODUCT HIGHLIGHTS
1. Supports data rates up to 2.25 Gbps, enabling 1080p deep color (12-bit color) HDMI formats, and greater than UXGA (1600 × 1200) DVI resolutions. Input cable equalizer enables use of long cables at the input (more than 20 meters of 24 AWG cable at 2.25 Gbps). Auxiliary switch routes a DDC bus and two additional signals for a single-chip, HDMI 1.3 receive-compliant solution.
2. 3.
Rev. 0
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