鈩?/div>
load
鈥?Internal bandgap voltage reference
鈥?Double-buffered data for low distortion
鈥?TTL-compatible inputs
鈥?Low glitch energy
鈥?Single +5 Volt power supply
Description
FMS3810/3815 products are low-cost triple D/A converters
that are tailored to 鏗乼 graphics and video applications where
speed is critical. Two speed grades are available:
FMS3810
FMS3815
100 Ms/s
150 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
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
reference 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
7-0
8
8 bit D/A
Converter
IO
G
B
7-0
8
8 bit D/A
Converter
IO
B
R
7-0
CLOCK
8
8 bit D/A
Converter
IO
R
COMP
R
REF
V
REF
+1.235V
Ref
REV. 1.08 12/21/00
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