鈩?/div>
load
Internal bandgap voltage reference
Double-buffered data for low distortion
TTL-compatible inputs
Low glitch energy
Single +5 Volt power supply
Description
FMS3110/3115/3120/3125 products are low-cost triple D/A
converters that are tailored to 鏗乼 graphics and video applica-
tions where speed is critical. Four speed grades are available:
FMS3110
FMS3115
FMS3120
FMS3125
100 Ms/s
150 Ms/s
200 Ms/s
250 Ms/s
Applications
鈥?Video signal conversion
鈥?RGB
鈥?YC
B
C
R
鈥?Composite, Y, C
鈥?Multimedia systems
鈥?Image processing
鈥?True-color graphics systems (1 billion colors)
鈥?Broadcast television equipment
鈥?High-De鏗乶ition Television (HDTV) equipment
鈥?Direct digital synthesis
TTL-level inputs are converted to analog current outputs that
can drive 25鈥?7.5
鈩?/div>
loads corresponding to doubly-terminated
50鈥?5
鈩?/div>
loads. A sync current following SYNC input timing
is added to the I
OG
output. BLANK will override RGB
inputs, setting I
OG
, I
OB
and I
OR
currents to zero when
BLANK = L. Although appropriate for many applications
the internal 1.235V reference voltage can be overridden by
the V
REF
input.
Few external components are required, just the current refer-
ence resistor, current output load resistors, and decoupling
capacitors.
Package is a 48-lead LQFP. Fabrication technology is
CMOS. Performance is guaranteed from 0 to 70擄C.
Block Diagram
SYNC
BLANK
SYNC
G
9-0
10
10 bit D/A
Converter
IO
G
B
9-0
10
10 bit D/A
Converter
IO
B
R
9-0
CLOCK
10
10 bit D/A
Converter
IO
R
COMP
R
REF
V
REF
+1.235V
Ref
Rev. 1.03 9/19/00
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