SC7123
HIGH SPEED
TRIPLE 10‐Bit VIDEO D/A CONVERTER
SC7123•Rev.2.1.1 1
©2010SteadiChipsCo.,Ltd
FEATURES
240MSPSTHROUGHPUTRATE
TRIPLE10‐bitD/ACONVERTER
WIDESPURIOUS‐FREEDYNAMICRANGE:
76dBatf
CLK
=50MHz;f
OUT
=1MHz
77dBatf
CLK
=100MHz;f
OUT
=2.01MHz
DIFFERENTIALCURRENTOUTPUT
RS‐343A‐/RS‐170‐COMPATIBLEOUTPUT
SINGLE5/3.3VPOWERSUPPLY
TTL‐COMPATIBLEINPUTS
OUTPUTCURRENTRANGE:2.0mATO26.5mA
LOWPOWERSTANDBYMODE(1mW)
48‐PINLQFPPB‐FREEPACKAGE
APPLICATIONS
IMAGEPROCESSING
HIGHRESOLUTIONCOLORGRAPHICS
VIDEOSIGNALRECONSTRUCTION
INSTRUMENTATION
DESCRIPTION
The SC7123 is a low cost general‐purpose triple
high‐speedD/Aconverter,whichisoptimizedforvideo
graphics applications. The SC7123 contains three
matched 10‐bit DACs, which adopt an advanced, high
speed, segmented architecture. It consists of a
standardTTLinputinterface,asetofhighimpedance,
analog output
current sources and a complementary
output. The SC7123 has additional video control
signals,composite S
__
Y
__
N
__
C
__
and B
__
L
__
A
__
N
__
K
__
.TheSC7123also
has a power save mode. Its monolithic CMOS
constructionensuresgreaterfunctionality.Featuredby
a proprietary switching technique and segmented
current source architecture, the SC7123 dramatically
reduce spurious components and enhance dynamic
performance.ThroughtheEdge‐triggeredinputlatches
and a built‐in 1.235V temperature compensated
bandgap
reference,theSC7123providethecostumers
aneasyandcost‐savingchoice.
The SC7123 is developed for low‐power low‐voltage
applications,whosesupplyrangeisfrom+2.7Vto+5V.
The SC7123 is specified over the industrial (–40°C to
+85°C) or commercial (0°C to +70°C) temperature
ranges.
PRODUCTHIGHLIGHTS
240MHZ MAXIMUM SAMPLING CLOCK
FREQUENCY
10BITRESOLUTION
ON‐CHIP1.235VREFERENCE
ADJUSTABLESCALEFROM2MATO26.5MA
HIGHESDCAPABILITY(>8000VHBM)
FUNCTIONALBLOCKDIAGRAM
BLANK
SYNC
VAA
10
DATA
REGISTER
10
DAC
BLANKAND
SYNCLOGIC
IOR
IOR
10
DATA
REGISTER
10
DAC
IOG
IOG
10
DATA
REGISTER
10
DAC
IOB
IOB
POWER‐ DOWN
MODE
PSAVE
VOLTAGE
REFERENCE
CIRCUIT
GND COMPR
SET
VREF
R9ToR0
G9ToG0
B9ToB0
REV.2.1.1
InformationfurnishedbySteadiChipsisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbySteadiChipsforitsuse,orforanyinfringementsof patentsorother
rightsofthirdpartieswhichmayresultfromitsuse.Nolicenseisgrantedbyimplicationorotherwiseunderanypatentor
patentrightsofSteadiChips
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