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DC794A

Description
Video IC Development Tool LT6554CGN - Triple High Speed ​​Video Buff
CategoryEmbedded solution    Engineering tools    Analog and digital IC development tools    Video IC development tools   
File Size262KB,6 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
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DC794A Overview

Video IC Development Tool LT6554CGN - Triple High Speed ​​Video Buff

DC794A Parametric

Parameter NameAttribute value
MakerADI
Product CategoryVideo IC Development Tools
Shipping restrictionsMouser does not currently sell this product.
productDemonstration Boards
typeHigh Speed Video Buffer
Tools for assessmentLT6554
Working power voltage4.5 V to 12 V
seriesLT6554
Factory packaging quantity1
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 794
TRIPLE HIGH SPEED VIDEO BUFFER
LT6554
DESCRIPTION
Demonstration Circuit 794 is a Triple High Speed
Video Buffer featuring the LT6554. This circuit is de-
signed to demonstrate DC-coupled performance in
either split- or single-supply operation. Table 1 indi-
Table 1. Performance Summary (T
A
= 25°C)
PARAMETER
Supply Voltage
Input Impedance, INR, ING, INB
Output Impedance, OUTR, OUTG, OUTB
CAL trace Impedance
Gain
Bandwidth
Crosstalk
Outputs terminated into 75Ω
Outputs terminated into High impedance
–3dB, outputs terminated in 75Ω, -13dBm input
Worst-case All Hostile, 10MHz
Worst-case All Hostile, 100MHz
±3.3V Split Supply, No Output Clipping, Hi-Z loading
Input Signal Voltage Range
±5.0V Split Supply, No Output Clipping, Hi-Z loading
+9.0V Single Supply, No Output Clipping, Hi-Z loading
On/Off Control Input
Logic Low Voltage (Amplifiers ON), DGND = 0V
Logic High Voltage (Amplifiers OFF), DGND = 0V
CONDITION
Split supply operation, Min/Max
Single supply operation, Min/Max
VALUE
±2.3V/±6V
+4.5/+12V
75Ω, dc-coupled to ground
75Ω, dc-coupled
75Ω nominal
-6dB nominal
0dB nominal
450MHz typical
–75dB typical
–50dB typical
±2.0V
±3.7V
+1.3 to +7.7V
≤0.8V
≥2.0V
(5.5V max)
cates the performance that is achieved with this
evaluation board.
Design files for this circuit board are available. Call
the LTC factory.
OPERATING PRINCIPLES
DC794 provides three identical channels of wideband
signal buffering suitable for driving HDTV or high-
resolution RGB video multiplexers or digitizers. Each
buffer section of the LT6554 provides a fixed gain of
1 to a destination load. Each input is terminated to
analog ground to properly load the input signal ca-
bles.
To minimize ingress of external digital ground noise,
the DGND logic reference input is decoupled from
analog ground within the LT6554. DC794 includes a
jumper, JP2, which allows the DGND to be strapped
to the local analog ground (AGND); for example,
when the logic source is floating or none is used dur-
ing the evaluation. DGND may be left uncommitted
with JP2 in the FLOAT position.
Another jumper, JP1, allows the LT6554 to be forced
to an ENABLE condition. If JP1 is left in the EXTernal
position, then enabling the LT6554 is accomplished
by pulling down the EN connection to a level near that
of DGND via connection to E1 or J1. A pull-up resis-
tor internal to the LT6554 will provide a default shut-
down mode of operation if the control input is left
1
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