www.fairchildsemi.com
FMS3810/3815
Triple Video D/A Converters
3 x 8 bit, 150 Ms/s
Features
Description
• 8-bit resolution
• 150 megapixels per second
– 0.2% linearity error
FMS3810/3815 products are low-cost triple D/A converters
that are tailored to fit graphics and video applications where
speed is critical. Two speed grades are available:
• Sync and blank controls
FMS3810
FMS3815
100 Ms/s
150 Ms/s
• 1.0V p-p video into 37.5Ω or 75Ω load
• Internal bandgap voltage reference
• Double-buffered data for low distortion
• TTL-compatible inputs
• Low glitch energy
• Single+5Voltpowersupply
TTL-level inputs are converted to analog current outputs that
can drive 25–37.5Ω loads corresponding to doubly-terminated
50–75Ω loads. A sync current following SYNC input timing
is added to the I
output. BLANK will override RGB
OG
inputs, setting I , I and I currents to zero when
BLANK = L. Although appropriate for many applications
the internal 1.235V reference voltage can be overridden by
OG OB OR
Applications
• Video signal conversion
– RGB
the V
input.
REF
– YC C
– Composite, Y, C
• Multimedia systems
• Image processing
B
R
Few external components are required, just the current
reference resistor, current output load resistors, and
decoupling capacitors.
• True-color graphics systems
Package is a 48-lead LQFP. Fabrication technology is
CMOS. Performance is guaranteed from 0 to 70°C.
Block Diagram
SYNC
SYNC
BLANK
8
8
8
8 bit D/A
IO
IO
IO
G
G
B
R
7-0
Converter
8 bit D/A
Converter
B
7-0
8 bit D/A
Converter
R
7-0
CLOCK
COMP
R
REF
REF
+1.235V
Ref
V
REV. 1.08 12/21/00